Komatsubulldozersmall ( - d39)
Komatsu D21A-7T(S/N 78604-UP (Trimming Dozer (m/c)))
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu D21A-7T (S/N 78604-UP) is a compact crawler dozer designed for utility earthmoving, grading, and trimming applications. This Dash-7 generation machine operates in the approximately 3,600 kg (7,937 lb) weight class and is powered by a Komatsu 4D95S engine delivering 40 hp (2 leaves 29.8 kW) at 2450 rpm. The unit features a hydrostatic (HS) transmission providing two forward and two reverse gears.
The Dash-7 series represents the Tier 3 / Stage IIIA emissions era, offering improved efficiency over previous generations. This specific serial range (78604-UP) is critical in the used parts market due to its specialized trimming configuration. Maintenance of the hydrostatic powertrain and engine components remains vital for preserving resale value and operational reliability in utility applications.
Below: full specifications, fluids & capacities, the factory service schedule, common service parts, verified fault codes, what owners discuss, attachment guidance, the complete assembly directory, and a serial-number reference. Complete parts lists with full OEM part numbers, exploded diagrams, quantities, and fitment data are available free in Heavy Parts AI.
Komatsu D21A-7T(S/N 78604-UP (Trimming Dozer (m/c))) specifications
Engine
| Engine Model | 4D95S |
| Number of Cylinders | 4 |
| Displacement | 2.7 L (164.2 cu in) |
| Gross Power | 40 hp (29.8 kW) @ 2450 rpm |
| Emissions Tier | Tier 3 / Stage IIIA |
Weights
| Operating Weight | 3,600 kg (7,936.7 lb) |
Dimensions
| Length w/ Blade | 3.4 m (11.16 ft) |
| Length w/o Blade | 2.56 m (8.4 ft) |
| Width Over Tracks | 1.le m (5.29 ft) |
| Height To Top Of Cab | 2.475 m (8.13 ft) |
| Ground Clearance | 295 mm (0.97 ft) |
| Length of Track on Ground | 1.685 m (5.53 ft) |
Undercarriage
| Track Gauge | 1.31 m (4.3 ft) |
| Standard Shoe Size | 30.2 cm (11.82 in) |
| Track Pitch | 135 mm (5.32 in) |
| Number of Track Rollers Per Side | 5 |
Performance
| Transmission Type | Hydrostatic (HS) |
| Number of Forward Gears | 2 |
| Number of Reverse Gears | 2 |
Blades
| Standard Blade Width | 2.17 m (7.2 ft) |
| Standard Blade Height | 590 mm (23.3 in) |
Service Capacities & Maintenance
| Maintenance Interval: 10h | Check fluid levels, leaks, air cleaner temp control, underbody inspection |
| Maintenance Interval: 250h | Change engine oil/filter, check battery, inspect drivebelt |
| Maintenance Interval: 500h | Change coolant, brake hydraulic fluid, inspect brake pipes, check idle speed |
| Maintenance Interval: 1000h | Change transmission oil, air cleaner element, inspect emission filter, check crankcase ventilation |
| Maintenance Interval: 2000h | Check valve clearance, renew hydraulic hoses/seals, inspect final drives, intensive inspection |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
Komatsu D21A-7T(S/N 78604-UP (Trimming Dozer (m/c))) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the D21A-7T(S/N 78604-UP (Trimming Dozer (m/c))) beyond the schedule
Predictive Maintenance & Fluid Analysis
Monitor engine oil and transmission oil quality regularly to detect internal wear. For the 4D95S engine, frequent checks of coolant levels and concentration are necessary to prevent overheating. Use fluid analysis to identify early signs of hydraulic contamination or metal particulates in the hydrostatic transmission, which can lead to significant power loss or gear failure.
Corrective & Common Repairs
Address error codes E10 and E15 immediately by checking engine controller power, fuses, and sensor wiring. If hydraulic performance drops, inspect brake hydraulic hoses and seals for leaks. For steering or track engagement issues, examine the hydraulic controls and clutch components. Ensure air cleaner temperature control is functional to prevent intake clogging (Code AA10NX).
Overhaul & Rebuild Points
Plan for valve clearance adjustments during major service intervals to maintain engine timing. During powertrain overhauls, focus on the hydrostatic transmission planetary gears and final drive components. Complete undercarriage rebuilds should include inspecting track rollers, idlers, and sprocket wear. Renewing all hydraulic hoses and seals is essential during any deep-system overhaul to prevent pressure loss.
Seasonal & Environment Servicing
In dusty environments, prioritize air cleaner element renewal and emission filter inspections to prevent engine choking. During cold operations, verify glow plug functionality and battery electrolyte levels. For machines operating in high-mointure areas, inspect the undercarriage and chassis covers for dirt accumulation that can cause corrosion or hide structural fatigue.
D21A-7T(S/N 78604-UP (Trimming Dozer (m/c))) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| YM129901-55800 | Fuel Filter Ass'Y | Fuel system service | Check fitment → |
| YM129910-55600 | Fuel Filter Ass'Y | Fuel system service | Check fitment → |
| YM129470-55610 | Body, Fuel Filter | Fuel system service | Check fitment → |
| 07281-00197 | Clamp,(With Pre-Fuel Filter) | Fuel system service | Check fitment → |
| 104-98-41140 | Plate,Engine Fuel Filter | Fuel system service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
D21A-7T(S/N 78604-UP (Trimming Dozer (m/c))) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| E03 | Swing parking brake system error | Discrepancies or issues within the parking brake system | Immediate inspection of the lever's connectivity and alignment |
| E10 | Engine controller power failure or engine control drive system circuit malfunction | Power loss to the controller or circuit malfunction leading to engine stall | Check engine controller power supply and examine control drive system circuits |
| E11 | Engine control system failure | System malfunction causing a decrease in output power to protect the engine | Inspect engine control system components for malfunctions |
| E15 | Engine sensor fault | Malfunction in temperature, fuel pressure, or oil pressure sensors | Scrutinize engine sensors and their interconnections for integrity |
| AA10NX | Air filter clogging | Accumulation of debris in the air cleaner | Clean or replace the air filter element |
| AB00KE | Low charging voltage | Battery charge voltage is too low | Inspect alternator output and battery connection integrity |
| B@BAZG | Low engine oil pressure | Insufficient pressure within the engine lubrication system | Check engine oil level and inspect oil pump operation |
| B@BCNS | Engine coolant overheating | Engine water temperature exceeding safe operating limits | Inspect cooling system, radiator, and coolant levels |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
D21A-7T(S/N 78604-UP (Trimming Dozer (m/c))) attachments & work tools
Blades
Standard blade width is 2.17 m (7.2 ft) with a height of 0.59 m (23.3 in). Available configurations include C-frame, PAT dozer blades, and various cutting edges.
Rippers
Ripper attachments are available for this model. Specific single-shank or multi-shank weight and configuration details are not documented for this exact serial range.
Winches
Not documented for this exact serial range — verify with your dealer.
Drawbars/counterweights
Not documented for this exact serial range — verify with your dealer.
Cab/ROPS guarding options
Work equipment control components such as attachment levers and knobs are available for PAT dozer configurations. Specific forestry or waste guarding options are not documented for this exact serial range.
Hydraulic arrangement notes
The machine utilizes a hydrostatic (HS) transmission. Hydraulic oil capacity is identified via dipstick, and the system uses Komatsu HYDO/EO compatible fluids.
All D21A-7T(S/N 78604-UP (Trimming Dozer (m/c))) assemblies by section
Every catalogued assembly group for the Komatsu D21A-7T(S/N 78604-UP (Trimming Dozer (m/c))). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
4d98e-1a-Tr S/N 00101-Up
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Air Cleaner (For Trimming Dozer)(#00101-02485)
| YM***02 | Bolt Plated | 4 |
| YM***40 | Valve,Unloader | 1 |
| YM***10 | Hose | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Air Cleaner (For Trimming Dozer)(#02486-)
| YM***40 | Valve,Unloader | 1 |
| YM***30 | Pan,Dust | 1 |
| YM***22 | Screw | 6 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Air Intake Manifold
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Alternator (25a) (Inner Parts)(#02486-)
| YM***01 | Cover | 1 |
| YM***60 | Wire | 1 |
| YM***00 | Starter Ass'Y | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Alternator And Mounting (25a) (For Trimming Dozer)(#00101-02485)
| YM***00 | Alternator A. (25a) | 1 |
| YM***40 | Distance Piece | 1 |
| YM***02 | Screw | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Alternator And Mounting (25a) (For Trimming Dozer)(#02486-)
| YM***40 | Distance Piece | 1 |
| YM***40 | Screw | 1 |
| YM***30 | Plate,Adjust | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Block Heater (Cold Terrain Trimming Dozer)(#00101-02485)
| YM***00 | Heater,Block | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Camshaft And Tappet
| YM***00 | Tappet Rod | 8 |
| YM***50 | Bearing, Thrust | 1 |
| YM***80 | Camshaft Ass'Y | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Crankshaft (For Trimming Dozer)(#00101-02485)
| YM***00 | Crankshaft, Assembly | 1 |
| YM***20 | Parallel Pin | 1 |
| YM***50 | Pulley | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Crankshaft (For Trimming Dozer)(#02486-)
| YM***00 | Crankshaft, Assembly | 1 |
| YM***60 | Pulley | 1 |
| YM***30 | O-Ring (Kit) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Cylinder Block
| YM***60 | Cylinder Block, Assembly | 1 |
| YM***00 | Main Metal Ass'Y (Std) | 5 |
| YM***50 | Plug | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Cylinder Block Accessory
| YM***50 | Oil Pressure Transmitter | 1 |
| YM***50 | Oil Pressure Transmitter | 1 |
| YM***90 | Valve,Water Drain | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Cylinder Head
| YM***80 | Retainer, Spring | 8 |
| YM***40 | Seal,Valve? Exhaust (Kit) | 4 |
| YM***00 | Plug | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Dipstic
| YM***00 | Gauge,Oil | 1 |
| YM***10 | Guide,Oil Gauge | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Drive Gear
| YM***00 | Idle Gear Ass'Y | 1 |
| YM***00 | Gear Ass'Y,Hydraulic Pump | 1 |
| YM***00 | Gear,Injection Pump Drive | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Electrical Parts (Forwerded Individually Parts)
| YM***00 | Relay Ass'Y,Safety | 1 |
| YM***10 | Relay Ass'Y,Magnetic | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Engine Stop Motor
| YM***20 | Bracket | 1 |
| YM***80 | Ring,Snap | 1 |
| YM***30 | Spring | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Exhaust Manifold (For Trimming Dozer)
| YM***02 | Nut | 2 |
| YM***20 | Cover | 1 |
| YM***52 | Screw | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Flywheel And Flywheel Housing
| YM***52 | Screw | 9 |
| YM***90 | Flywheel Ass'Y | 1 |
| YM***30 | Screw | 6 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Front Cover And Oil Pump
| YM***02 | Bolt Plated | 3 |
| YM***51 | Cap, Lub. Oil Supply | 1 |
| YM***02 | Screw | 10 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Front Hanger
| YM***10 | Hook,Front | 1 |
| YM***62 | Bolt,(For Shipping) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Fuel Filter (For Poor Fuel) (Inner Parts)
| YM***20 | Level Sensor Ass'Y | 1 |
| YM***30 | Plug,Drain | 1 |
| YM***00 | Fuel Filter Ass'Y | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Fuel Filter And Piping (For Poor Fuel)
| YM***10 | Banjo Fitting | 1 |
| YM***90 | Retainer | 2 |
| YM***70 | Joint | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Fuel Filter And Piping(#00101-02485)
| YM***02 | Screw | 1 |
| YM***10 | Banjo Fitting | 1 |
| YM***80 | Screw | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Fuel Filter And Piping(#02486-)
| YM***02 | Screw | 1 |
| YM***80 | Screw | 1 |
| YM***11 | Hose Ass'Y | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Fuel Injection Pump (Feed Pump) (Inner Parts)
| YM***40 | Gasket | 4 |
| YM***60 | O-Ring | 2 |
| YM***10 | Feed Pump Ass'Y | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Fuel Injection Pump (Governor) (1/2) (Inner Parts)
| YM***00 | Screw | 1 |
| YM***10 | Screw | 6 |
| YM***20 | Limiter | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Fuel Injection Pump (Governor) (2/2) (Inner Parts)
| YM***40 | Screw | 2 |
| YM***00 | Nut | 1 |
| YM***40 | Shim, 0.300 mm | 0 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Fuel Injection Pump (Pump) (1/2) (Inner Parts)
| YM***40 | Gasket | 2 |
| YM***00 | Adapter | 2 |
| YM***40 | Gasket | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Fuel Injection Pump (Pump) (2/2) (Inner Parts)
| YM***00 | Segment | 4 |
| YM***00 | Gasket Disc | 4 |
| YM***20 | Valve,Delivery | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Fuel Injection Pump And Piping
| YM***02 | Bolt Plated | 1 |
| YM***40 | Injection Pipe N. 4 | 1 |
| YM***20 | Retainer, Pipe | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Fuel Nozzle And Spill Hose
| YM***20 | Spring | 1 |
| YM***00 | Fuel Injection Nozzle, Assembly | 1 |
| YM***80 | Pipe | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Gasket Kit(#00101-02485)
| YM***40 | Seal,Valve? Exhaust (Kit) | 4 |
| YM***40 | O-Ring,Drain Plug | 1 |
| YM***01 | Gasket (Kit) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Gasket Kit(#02486-)
| YM***40 | Seal,Valve? Exhaust (Kit) | 4 |
| YM***20 | Gasket Kit | 1 |
| YM***40 | O-Ring,Drain Plug | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Head Cover
| YM***51 | Cap, Lub. Oil Supply | 1 |
| YM***42 | Screw | 1 |
| YM***00 | Screw | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Lubricating Oil Piping
| YM***81 | Retainer | 1 |
| YM***50 | Tube | 1 |
| YM***50 | Pipe | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Muffler
| YM***62 | Bolt | 1 |
| YM***02 | Nut | 4 |
| YM***22 | Stud | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Oil Filter
| YM***40 | Stud | 1 |
| YM***51 | Cartridge,Cylinder Head Cover | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Oil Pan (For Trimming Dozer And Cold Train Trimming Dozer)
| YM***00 | O-Ring (Kit) | 1 |
| YM***30 | Oil Pan Ass'Y | 1 |
| YM***00 | Spacer | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Piston And Connecting Rod
| YM***50 | Ring Set (+0.25 mm) | 1 |
| YM***00 | Connecting Rod, Assembly | 4 |
| YM***01 | Pin, Piston | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Rear Hanger
| YM***20 | Clamp,Harness | 1 |
| YM***00 | Suspension Plate | 1 |
| YM***62 | Bolt,(For Shipping) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Rocker Arm
| YM***20 | Rocker Socket | 1 |
| YM***80 | Spring | 3 |
| YM***60 | Rocker Arm Ass'Y,Exhaust | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Starting Motor (2.3kw) (Inner Parts) : Unit_01_of_02
| YM***20 | O-Ring | 1 |
| YM***80 | Holder Brush, Assembly | 1 |
| YM***20 | Shift Lever Ass'Y | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Starting Motor (2.3kw) (Inner Parts) : Unit_02_of_02
| YM***20 | O-Ring | 1 |
| YM***22 | Starting Motor Ass'Y,(2.3kw) | 1 |
| YM***80 | Holder Brush, Assembly | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Starting Motor And Mounting (2.3kw)
| YM***02 | Nut | 1 |
| YM***02 | Screw | 1 |
| (Y***2) | Starting Motor Ass'Y,(2.3kw) (See Fig.A6210-B0a3) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Tension Pulley(#02486-)
| YM***40 | Adjuster | 1 |
| YM***60 | Block | 1 |
| YM***02 | Nut | 3 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Tool
| YM***20 | Flex Horn (Option.) | 1 |
| YM***50 | Horn,Flex | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Water Pump And Cooling Fan (For Trimming Dozer)(#00101-02485)
| YM***00 | Pulley | 1 |
| YM***90 | Thermostat | 1 |
| YM***02 | Screw | 3 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : 4d98e-1a-Tr S/N 00101-Up : Water Pump And Cooling Fan (For Trimming Dozer)(#02486-)
| YM***52 | Bolt | 4 |
| YM***02 | Screw | 3 |
| YM***00 | Fan,Cooling | 1 |
Accessory
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Accessory : Cap & Overall
| 09***50 | Overall,(Special Order) | 1 |
| 09***57 | Cap,(Special Order) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Accessory : Seat(For Shassis)
| 11***11 | Seat,Chassis | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Accessory : Spare Parts
| 04***46 | V-Belt,Cooling Fan | 1 |
| 07***95 | O-Ring,Transmission Strainer | 1 |
| 07***28 | O-Ring,(For Hd325-6?Hm400-1) (A2110) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Accessory : Spare Parts (For Indnesia)(#80404-)
| 07***95 | O-Ring,Transmission Strainer | 1 |
| 07***28 | O-Ring,(For Hd325-6?Hm400-1) (A2110) | 2 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Accessory : Spare Parts(#78604-78851)
| 04***47 | V-Belt,(With 25a Alternator) | 1 |
| 07***95 | O-Ring,Transmission Strainer | 1 |
| 07***28 | O-Ring,(For Hd325-6?Hm400-1) (A2110) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Accessory : Spare Parts(#78852-) : Unit_02_of_03
| 07***95 | O-Ring,Transmission Strainer | 1 |
| 07***28 | O-Ring,(For Hd325-6?Hm400-1) (A2110) | 2 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Accessory : Spare Parts(#78852-) : Unit_01_of_03
| 07***95 | O-Ring,Transmission Strainer | 1 |
| 07***28 | O-Ring,(For Hd325-6?Hm400-1) (A2110) | 2 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Accessory : Spare Parts(#78852-) : Unit_03_of_03
| 07***95 | O-Ring,Transmission Strainer | 1 |
| 07***28 | O-Ring,(For Hd325-6?Hm400-1) (A2110) | 2 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Accessory : Spare Parts(#79672-)
| 07***95 | O-Ring,Transmission Strainer | 1 |
| 07***28 | O-Ring,(For Hd325-6?Hm400-1) (A2110) | 2 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Accessory : T00l
| 07***50 | Pump, (Bellows Type) | 2 |
| 07***03 | Cartridge - Grease | 1 |
| 07***17 | Nozzle | 1 |
Cooling System
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Cooling System : Cooling
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
| 01***20 | Bolt,(For Mono Lever Steering) | 5 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Cooling System : Cooling Radiator (For Trimming Dozer)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
| 01***20 | Bolt,(For Mono Lever Steering) | 7 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Cooling System : Cooling Radiator (With Sandy Dusty Protection Grid)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 4 |
| 01***20 | Bolt,(For Mono Lever Steering) | 7 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Cooling System : Cooling Radiator (With Sandy Dusty Protection Grid) (For Trimming Dozer)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 4 |
| 01***20 | Bolt,(For Mono Lever Steering) | 7 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Cooling System : Reserve Tank
| 01***16 | Bolt - Box Mounting | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***23 | Washer,(With Auto Emergency Steering) | 2 |
Electrical System
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Electrical System : Back-Up Alarm
| 01***05 | Capscrew | 2 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 2 |
| 01***11 | Nut | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Electrical System : Back-Up Buzzer (For Trimming Dozer)(#78906-)
| 01***16 | Bolt - Box Mounting | 1 |
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Electrical System : Battery
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
| 08***00 | Terminal? (+),(10l) (Not Shown) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Electrical System : Battery Dry
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
| 08***00 | Terminal? (+),(10l) (Not Shown) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Electrical System : Battery Wiring
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
| 08***20 | Wire | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Electrical System : Vehicle Lamp
| 01***10 | Nut,(Fig.F2820-01a3-12) | 2 |
| 10***20 | Lamp Ass'Y | 3 |
| 10***10 | Bulb? 55w | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Electrical System : Vehicle Wiring (1/2)(#80266-)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 3 |
| 01***15 | Bolt | 1 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 9 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Electrical System : Vehicle Wiring (2/2)(#80266-)
| 01***10 | Bolt,(With Auto Emergency Steering) | 1 |
| 01***20 | Bolt,(Without Air Con. Or Heater) | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Electrical System : Vehicle Wiring (For Two Levers Steering) (1/2)(#78604-80265)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 2 |
| 01***15 | Bolt | 1 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 8 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Electrical System : Vehicle Wiring (For Two Levers Steering) (2/2)(#78604-80265)
| 01***10 | Bolt,(With Auto Emergency Steering) | 1 |
| 01***20 | Bolt,(Without Air Con. Or Heater) | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
Engine Related Parts
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Engine Related Parts : Damper 50ps
| 01***16 | Bolt - Seat And Tether Belt Mounting | 8 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 10 |
| 01***75 | Bolt (M10-1.50x75) | 3 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Engine Related Parts : Damper Std
| 01***16 | Bolt - Seat And Tether Belt Mounting | 8 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 10 |
| 01***75 | Bolt (M10-1.50x75) | 3 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Engine Related Parts : Engine Mount
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 1 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***40 | Bolt (Op) | 8 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Engine Related Parts : Engine Mount (Sandy Dusty Spec.)
| 01***25 | Bolt,(Rear Attachment Less) | 1 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Engine Related Parts : Engine Mount (With Pre Cleaner)
| 01***25 | Bolt,(Rear Attachment Less) | 1 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Engine Related Parts : Exhaust Pipe
| 01***11 | Nut,(Spark Arrester Spec.) | 2 |
| 01***13 | Nut | 1 |
| 61***70 | Bolt | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Engine Related Parts : Exhaust Pipe (For Trimming Dozer)
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 4 |
| 10***20 | Pipe | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Engine Related Parts : Exhaust Pipe Spark Arrester
| 01***45 | Bolt | 1 |
| 01***08 | Nut,(Spark Arrester Spec.), Nut; Was 01582-21008 | 2 |
| 01***11 | Nut,(Spark Arrester Spec.) | 2 |
Fuel Tank And Related Parts
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Fuel Tank And Related Parts : Control Knob (D21) (For F2-R2 Transmission) (For Two Lever Steering)
| 09***35 | Knob (Op) | 1 |
| 11***20 | Knob, Bucket And Front Attachment Control Lever | 1 |
| 11***60 | Plug | 5 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Fuel Tank And Related Parts : Control Knob (D21) (For F3-R3 Transmission)(#80266-)
| 09***35 | Knob (Op) | 1 |
| 11***60 | Plug | 5 |
| 17***81 | Knob | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Fuel Tank And Related Parts : Control Knob (D21) (For Rops Cab) (For F3-R3 Transmission)(#80266-)
| 09***35 | Knob (Op) | 1 |
| 10***10 | Extension,(With Cab) | 1 |
| 10***20 | Nut,(With Cab) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Fuel Tank And Related Parts : Control Knob (D21) (For Rops Cab)(#78604-80265)
| 09***35 | Knob (Op) | 1 |
| 10***10 | Extension,(With Cab) | 1 |
| 10***20 | Nut,(With Cab) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Fuel Tank And Related Parts : Control Knob (D21)(#78604-80265)
| 09***35 | Knob (Op) | 1 |
| 11***90 | Nut | 1 |
| 11***60 | Plug | 5 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Fuel Tank And Related Parts : Fuel Guide (D21) (For F3-R3 Transmission) (For Two Lever Steering)
| 01***25 | Bolt | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
| 10***30 | Cover | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Fuel Tank And Related Parts : Fuel Guide (D21)(#78604-80265)
| 01***25 | Bolt | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
| 10***22 | Cover | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Fuel Tank And Related Parts : Fuel Guide (D21)(#80266-)
| 01***25 | Screw | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
| 10***10 | Cover | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Fuel Tank And Related Parts : Fuel Line
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 5 |
| 01***32 | Washer,(With Auto Emergency Steering) | 5 |
| 04***10 | Clip | 6 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Fuel Tank And Related Parts : Fuel Line Additional Strainer
| 01***25 | Bolt,(Rear Attachment Less) | 2 |
| 01***30 | Bolt - M8 X 30lg | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 5 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Fuel Tank And Related Parts : Fuel Tank (D21)(#78604-80265)
| 01***40 | Bolt,For Weight Adjusting Bolt | 4 |
| 01***10 | Screw,(For Wiper Switch Earth) | 5 |
| 01***25 | Bolt | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Fuel Tank And Related Parts : Fuel Tank (D21)(#80266-)
| 01***40 | Bolt,For Weight Adjusting Bolt | 4 |
| 01***10 | Screw,(For Wiper Switch Earth) | 5 |
| 01***25 | Bolt | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Fuel Tank And Related Parts : Transmission Control Lever (1/2) (D21) (For F2-R2 Transmission) (For Two Lever Steering)
| 01***30 | Bolt - M8 X 30lg | 1 |
| 01***05 | Nut,L.H. (For Trimming Dozer) | 2 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 3 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Fuel Tank And Related Parts : Transmission Control Lever (1/2) (D21)(#78604-80265)
| 01***30 | Bolt - M8 X 30lg | 10 |
| 01***05 | Nut,L.H. (For Trimming Dozer) | 2 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 3 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Fuel Tank And Related Parts : Transmission Control Lever (1/2) (D21)(#80266-)
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Fuel Tank And Related Parts : Transmission Control Lever (2/2) (D21) (For F2-R2 Transmission) (For Two Lever Steering)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***32 | Washer,(With Auto Emergency Steering) | 6 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Fuel Tank And Related Parts : Transmission Control Lever (2/2) (D21)(#78604-80265)
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***08 | Washer,(For 1 Attachment And Pat) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Fuel Tank And Related Parts : Transmission Control Lever (2/2) (D21)(#80266-)
| 01***20 | Bolt,(For Mono Lever Steering) | 3 |
| 01***05 | Nut,L.H. (For Trimming Dozer) | 2 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Fuel Tank And Related Parts : Transmission Control Lever Linkage (D21) (For F2-R2 Transmission)(For Two Lever Steering)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***30 | Bolt - M8 X 30lg | 4 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Fuel Tank And Related Parts : Transmission Control Lever Linkage (D21)(#78604-80265)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***30 | Bolt - M8 X 30lg | 2 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Fuel Tank And Related Parts : Transmission Control Lever Linkage (D21)(#80266-)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***30 | Bolt - M8 X 30lg | 4 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
Guard
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Guard : Engine Hood
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***06 | Screw | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Guard : Engine Hood (With Pre Cleaner And Spark Arester) : Unit_02_of_02
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***08 | Nut, Regular Hexagon (M10-1.50) | 5 |
| 01***32 | Washer,(With Auto Emergency Steering) | 5 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Guard : Engine Hood (With Pre Cleaner And Spark Arester) : Unit_01_of_02
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Guard : Engine Side Cover
| 04***24 | Pin, Spring | 2 |
| 04***10 | Pin,Cotter (Without Towing Winch), Cotter Pin; Was 04050-11610 | 2 |
| 09***00 | Catcher | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Guard : Fendr
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 3 |
| 01***35 | Capscrew - M14 (1)/(2) | 8 |
| 01***40 | Capscrew | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Guard : Radiator Guard
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 8 |
| 01***16 | Screw,(P.O.C. Model) (Except Japan) | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Guard : Radiator Mask
| 01***12 | Nut,L.H. Thread | 2 |
| 04***18 | Pin,(For Straight Tilt Dozer) (D65p) | 2 |
| 10***42 | Grille,Lower | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Guard : Rear Bracket
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***40 | Capscrew | 4 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Guard : Rear Bracket(With Additional Fuel Strainer)
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***40 | Capscrew | 4 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Guard : Rear Cover : Unit_02_of_02
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***35 | Capscrew - M14 (1)/(2) | 4 |
| 01***50 | Capscrew | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Guard : Rear Cover : Unit_01_of_02
| 01***30 | Bolt - M14 X 30lg | 2 |
| 01***50 | Capscrew | 4 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 6 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Guard : Rear Cover (For 4 Pillar Type Canopy)
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***50 | Capscrew | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Guard : Rear Cover (For Russian)
| 01***30 | Bolt - M14 X 30lg | 2 |
| 01***50 | Capscrew | 4 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 6 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Guard : Steel Cab Mount (For Russian)
| 01***40 | Capscrew | 26 |
| 01***45 | Bolt, M14x2.0x45 | 8 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 34 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Guard : Under Guard
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***30 | Bolt - M14 X 30lg | 12 |
| 01***00 | Bolt | 2 |
Hydraulic System
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Hydraulic System : Hydraulic Piping (Delivery Piping And Safty Cover) (For 2-Valve)
| 01***25 | Bolt,(Rear Attachment Less) | 1 |
| 01***30 | Bolt - M8 X 30lg | 4 |
| 01***35 | Bolt,(For Fix Position) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Hydraulic System : Hydraulic Piping (Suction Piping)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Hydraulic System : Hydraulic Piping (Tilt Cylinder Line) (Chassis Side)
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***11 | Nut,(With Under Mirror) | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Hydraulic System : Hydraulic Tank (For 3-Point Hitch? Back-Up Alarm)(#78604-80265)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 4 |
| 01***06 | Screw | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Hydraulic System : Hydraulic Tank (For Back-Up Alarm)(#80266-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 4 |
| 01***06 | Screw | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Hydraulic System : Hydraulic Tank (For Rops Cab)(#78604-80265)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 4 |
| 01***06 | Screw | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Hydraulic System : Hydraulic Tank (For Rops Cab)(#80266-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 4 |
| 01***06 | Screw | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Hydraulic System : Hydraulic Tank(#78604-80265)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 4 |
| 01***06 | Screw | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Hydraulic System : Hydraulic Tank(#80266-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 4 |
| 01***06 | Screw | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Hydraulic System : Lift Cylinder Line (For Trimming Dozer)
| 01***30 | Bolt,(With Body Positioner) | 6 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 6 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Hydraulic System : Main Pump
| 01***30 | Bolt,(With Body Positioner) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 07***85 | O-Ring,(Without Fuel Level Gauge) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Hydraulic System : Main Valve (Mount)
| 01***25 | Bolt,(Rear Attachment Less) | 7 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 7 |
| 07***15 | O-Ring,(Without Boom Kickout) | 4 |
Main Frame And Related Parts
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Main Frame And Related Parts : Side Frame (For Trimming Dozer) (For Mono Lever Steering)
| 01***55 | Bolt,(Not Used For Chip Dozer) | 12 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 12 |
| 07***08 | Plug | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Main Frame And Related Parts : Steering Case Frame (For Trimming Dozer) (For Mono Lever Steering)
| 01***20 | Bolt,(For Mono Lever Steering) | 6 |
| 01***45 | Bolt,(With Water Separator Type) | 7 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 7 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Main Frame And Related Parts : Suspension (For Trimming Dozer)
| 01***40 | Capscrew | 8 |
| 01***50 | Bolt,(For D60pl) | 8 |
| 01***55 | Bolt,(Not Used For Chip Dozer) | 8 |
Marks And Plates
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Marks And Plates : Marks And Plates (Chinese)(#78604-81600)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Inspection And Maintenance | 1 |
| 09***35 | Plate? Name,Ripper (Limited Supply) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Marks And Plates : Marks And Plates (Chinese)(#81601-)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Inspection And Maintenance | 1 |
| 09***35 | Plate? Name,Ripper (Limited Supply) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Marks And Plates : Marks And Plates (English)(#78604-81600)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Inspection And Maintenance | 1 |
| 09***35 | Plate? Name,(Limited Supply) (English) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Marks And Plates : Marks And Plates (English)(#81601-)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Inspection And Maintenance | 1 |
| 09***35 | Plate? Name,(Limited Supply) (English) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Marks And Plates : Marks And Plates (Russian)(#78604-81600)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Inspection And Maintenance | 1 |
| 09***35 | Plate? Name,Name (Limited Supply) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Marks And Plates : Marks And Plates (Russian)(#81601-)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Inspection And Maintenance | 1 |
| 09***35 | Plate? Name,Name (Limited Supply) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Marks And Plates : Marks And Plates (Usa)(#78604-81600)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Inspection And Maintenance | 1 |
| 09***35 | Plate? Name,(Limited Supply) (English) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Marks And Plates : Marks And Plates (Usa)(#81601-)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Inspection And Maintenance | 1 |
| 09***35 | Plate? Name,(Limited Supply) (English) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Marks And Plates : Rops Plate Unit (Chinese)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Name,(Limited Supply) (Chinese) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Marks And Plates : Rops Plate Unit (English)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Name,Rops(Except U.S.A. And Canada) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Marks And Plates : Rops Plate Unit (German)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Name,(Rops And Fops)(Ec Regulation) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Marks And Plates : Rops Plate Unit (Spanish)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Name,(Spanish) (Limited Supply) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Marks And Plates : Rops Plate Unit (Usa)(#80053-)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***01 | Plate? Name,(Limited Supply) (Usa? Canada) | 1 |
Operator'S Compartment And Control System
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Arm Rest
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 11***40 | Rest,Arm | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Brake Control Pedal (Brake Pedal) (For Mono Lever Steering)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(With Body Positioner) | 5 |
| 01***32 | Screw | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Brake Control Pedal (Brake Pedal) (For Russian) (For Mono Lever Steering)
| 01***30 | Bolt - M8 X 30lg | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(With Body Positioner) | 5 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Brake Control Pedal (Linkage) (For Mono Lever Steering)
| 01***45 | Bolt, Mounting Cranking Motor | 1 |
| 01***06 | Nut,L.H. Thread (For Russian) | 3 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Canvas Canopy
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 8 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Car Heater (Electrical System) (For Russian)
| 01***08 | Screw, Control Lever Rod | 4 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 4 |
| 01***05 | Washer,(Additional Sun Visor) | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Car Heater (Heater Piping) (For Russian)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 3 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Car Heater (Heater) (For Russian)
| 01***16 | Bolt - Box Mounting | 6 |
| 01***20 | Bolt,(For Mono Lever Steering) | 5 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Car Heater Unit (For Russian)
| 11***50 | Car Heater Ass'Y,(See Fig.K0710-51a0) | 1 |
| ND***30 | Case Ass'Y | 1 |
| ND***80 | Wire Ass'Y | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Center Floor
| 01***20 | Bolt,(For Mono Lever Steering) | 8 |
| 01***32 | Washer,(With Auto Emergency Steering) | 8 |
| 10***10 | Plate,Floor (D21) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Center Floor (For Russian)
| 01***20 | Bolt,(For Mono Lever Steering) | 8 |
| 01***32 | Washer,(With Auto Emergency Steering) | 8 |
| 04***10 | Pin,Cotter (Without Towing Winch), Cotter Pin; Was 04050-11610 | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Control Rod (For Trimming Dozer)
| 01***20 | Bolt,(For Mono Lever Steering) | 3 |
| 01***04 | Nut,(For Air Conditioner Less) | 1 |
| 01***13 | Washer,Spring(For Wiper Switch Earth) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Floor Mat
| 10***32 | Floor Mat,(For D21) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Floor Mat (For Russian)
| 10***30 | Floor Mat,(For Car Heater) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Handrail
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 6 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Handrail (For Two Levers Steering)
| 01***35 | Bolt,(F4320-52a0 -5 ) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
| 10***71 | Handle | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Handrail (With 4-Pillar Type Canopy)
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 10***11 | Handle | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Handrail (With Two Levers Steering 4-Pillar Type Canopy) Or (For Russian)
| 07***18 | Plug,(With Extinguisher) (D31p) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Head Guard
| 01***40 | Capscrew | 18 |
| 01***75 | Capscrew | 24 |
| 01***42 | Washer,Spring (For Pedal Steering), Washer-Spring | 18 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Inching Control (Inching Pedal) (For F3-R3 Transmission)
| 01***30 | Bolt,(With Body Positioner) | 3 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 3 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Inching Control (Inching Pedal) (For F3-R3 Transmission) (For Russian)
| 01***30 | Bolt,(With Body Positioner) | 3 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 3 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Inching Control (Linkage) (For F3-R3 Transmission)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***30 | Bolt,(With Body Positioner) | 1 |
| 01***06 | Nut,L.H. Thread (For Russian) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Operator'S Seat
| 01***25 | Bolt,(Rear Attachment Less) | 8 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Operator'S Seat (With Oil Damper)
| 01***20 | Bolt,(For Mono Lever Steering) | 9 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***10 | Nut,(Without Air Conditioner) | 8 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Operator'S Seat (With Steel Cab) (For Russian)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 3 |
| 01***25 | Bolt,(Rear Attachment Less) | 8 |
| 01***30 | Bolt,(With Body Positioner) | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Panel (For Mono Lever Steering)
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 3 |
| 01***25 | Screw | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Panel (For Mono Lever Steering) (With Vandalism Protection)
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 3 |
| 01***25 | Screw | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Rops Canopy
| 01***80 | Washer,(For R.H. Steering) | 4 |
| 10***11 | Guard Ass'Y,Rops Canopy | 1 |
| 10***12 | Guard Ass'Y,Rops Canopy | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Seat Belt
| 09***01 | Bolt,(For Shipping) | 2 |
| 09***02 | Washer,(For Shipping) | 2 |
| 09***03 | Nut,(For Shipping) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Seat Belt (With Oil Damper)
| 09***01 | Bolt,(For Shipping) | 4 |
| 09***02 | Washer,(For Shipping) | 4 |
| 09***03 | Nut,(For Shipping) | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Seat Front Cover (With Oil Damper)(#78604-80265)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 10***10 | Cover,(For Oil Damper Seat) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Seat Front Cover (With Oil Damper)(#80266-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 10***20 | Cover | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Seat Front Cover (With Steel Cab) (For Russian)(#78604-80265)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***25 | Bolt? Wing,Wing | 2 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Seat Front Cover(#78604-80265)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 10***30 | Cover | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Seat Front Cover(#80266-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 10***10 | Cover | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Side Floor
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 6 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Side Floor (For Russian)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 6 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Steel Cab (Body And Door) (For Russian)
| 01***20 | Bolt,(Without Air Con. Or Heater) | 4 |
| 01***45 | Bolt | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 10 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Steel Cab (Body Seal) (For Russian)
| 01***16 | Bolt - Box Mounting | 9 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***19 | Washer,Spring (With Extinguisher) (D31p) | 9 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Steel Cab (Body Wiring) (For Russian)
| 01***12 | Screw,(Additional Sun Visor) | 1 |
| 01***13 | Washer,Spring(For Wiper Switch Earth) | 1 |
| 08***30 | Wire,Ground Connection | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Steel Cab (Door Open Lock And Rear Window) (For Russian)
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Steel Cab (Electrical System 1/2) (For Russian)
| 01***16 | Bolt - Box Mounting | 8 |
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
| 01***16 | Screw,(Sandy And Dusty Terrain S.) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Steel Cab (Electrical System 2/2) (For Russian)
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***10 | Screw,(For Lighter) | 2 |
| 01***08 | Screw,(Except Japan) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Steel Cab (Mount Cushion) (For Russian)
| 01***80 | Washer,(For R.H. Steering) | 4 |
| 11***90 | Bracket,(For Rops Cab) | 4 |
| 14***50 | Bolt,(For Rops Cab) | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Steel Cab (Sun Roof And Accessory) (For Russian)
| 01***25 | Capscrew | 24 |
| 01***16 | Screw,(P.O.C. Model) (Except Japan) | 17 |
| 01***10 | Screw (Op) | 3 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Steel Cab (Window Glass) (For Russian)
| 01***16 | Bolt - Box Mounting | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***16 | Screw,(Not Used When Ventilator) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Work Equipment Control (Guide)
| 01***25 | Bolt | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
| 10***11 | Cover | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Work Equipment Control (Knob)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 6 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 8 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Work Equipment Control (Lever? 1/2)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 1 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Operator'S Compartment And Control System : Work Equipment Control (Lever? 2/2)
| 01***30 | Bolt - M8 X 30lg | 1 |
| 01***05 | Nut,L.H. (For Trimming Dozer) | 2 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 2 |
Power Train And Final Drive
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Bevel Gear And Shaft (D21)
| 01***30 | Screw | 9 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 6 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 6 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Brake Cylinder
| 01***45 | Bolt,(With Water Separator Type) | 4 |
| 01***11 | Nut - Mounting | 2 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Final Drive (For Trimming Dozer)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 16 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 8 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Final Drive Sprocket (For Trimming Dozer)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***30 | Bolt,(With Body Positioner) | 16 |
| 01***11 | Nut - Mounting | 24 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Steering Brake
| 10***60 | Rivet | 32 |
| 10***30 | Band | 1 |
| 10***21 | Band Ass'Y,Brake | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Steering Brake Support
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***50 | Bolt,(Spark Arrester Spec.) | 18 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Steering Case Cover (L.H)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
| 01***45 | Bolt, M14x2.0x45 | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Steering Case Cover (R.H)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
| 01***45 | Bolt, M14x2.0x45 | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Steering Clutch (For F3-R3 Transmission)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 16 |
| 01***10 | Nut (K10) | 2 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 16 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Steering Clutch (For Trimming Dozer)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 16 |
| 01***10 | Nut (K10) | 2 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 16 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Steering Cylinder
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 4 |
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Steering Cylinder Line
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 3 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Steering Oil Lines (For F3-R3 Transmission) (For Mono Lever Steering)
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Steering Valve
| 01***20 | Bolt,(Without Maintenance Monitor) | 4 |
| 07***20 | O-Ring,Relief Valve | 4 |
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Transfer (F3-R3)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***75 | Bolt - Tube Mounting | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Transmission (F3-R3) (1st Housing)
| 01***45 | Screw | 10 |
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***08 | Screw | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Transmission (F3-R3) (1st Housing)(#80266-)
| 01***45 | Screw | 10 |
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***08 | Screw | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Transmission (F3-R3) (2nd Housing)
| 10***50 | Bolt | 4 |
| 10***50 | Housing Ass'Y,2nd | 1 |
| 10***70 | Hub | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Transmission (F3-R3) (Carrier)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 4 |
| 04***25 | Ring,(W/Emergency Steering) (1m?1d) | 1 |
| 06***08 | Bearing,Ball | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Transmission (F3-R3) (Carrier)(#80266-)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 4 |
| 04***25 | Ring,(W/Emergency Steering) (1m?1d) | 1 |
| 06***08 | Bearing,Ball | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Transmission (F3-R3) (Case)
| 01***65 | Hexagon Bolt | 2 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***35 | Bolt,(For Fix Position) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Transmission (F3-R3) (Filler)
| 01***30 | Bolt,(With Body Positioner) | 2 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 2 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Transmission (F3-R3) (Forward And 3rd Housing)
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 4 |
| 04***24 | Pin,Dowel (For No.3 Housing) | 2 |
| 07***05 | O-Ring,(Not Used With Emergency Str.) (K2) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Transmission (F3-R3) (Inching Lever)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***05 | Nut,L.H. (For Trimming Dozer) | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Transmission (F3-R3) (Input And Output)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***12 | Washer,(F2320-63a2 -13 ) | 1 |
| 04***00 | Key | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Transmission (F3-R3) (Lever)(#78604-80265)
| 01***30 | Bolt - M8 X 30lg | 4 |
| 01***25 | Screw | 3 |
| 01***05 | Nut,L.H. (For Trimming Dozer) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Transmission (F3-R3) (Lever)(#80266-)
| 01***30 | Bolt - M8 X 30lg | 4 |
| 01***25 | Screw | 3 |
| 01***05 | Nut,L.H. (For Trimming Dozer) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Transmission (F3-R3) (Pump)
| 01***45 | Screw | 3 |
| 01***55 | Screw | 7 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Transmission (F3-R3) (Reverse Housing)
| 04***25 | Ring, Retaining | 1 |
| 06***13 | Bearing,Ball | 1 |
| 07***70 | O-Ring,(F2320-52a3 -9 ) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Transmission (F3-R3) (Reverse Housing)(#80266-)
| 04***25 | Ring, Retaining | 1 |
| 06***13 | Bearing,Ball | 1 |
| 07***70 | O-Ring,(F2320-52a3 -9 ) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Transmission (F3-R3) (Shift Valve)
| 01***25 | Bolt,(Rear Attachment Less) | 2 |
| 01***50 | Capscrew | 8 |
| 01***75 | Capscrew | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Transmission (F3-R3) (Shift Valve)(#80266-)
| 01***25 | Bolt,(Rear Attachment Less) | 2 |
| 01***50 | Capscrew | 8 |
| 01***75 | Capscrew | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Transmission Control Valve (F3-R3)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 5 |
| 01***60 | Bolt,(With Body Positioner) | 3 |
| 01***70 | Screw | 5 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Transmission Oil Line
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***30 | Bolt,(With Body Positioner) | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Transmission Oil Line (For Trimming Dozer)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Transmission Support (For F3-R3 Transmission)
| 01***30 | Bolt,(With Body Positioner) | 12 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 5 |
| 01***30 | Stud | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Power Train And Final Drive : Universal Joint (For F3-R3 Transmission)
| 01***40 | Screw, Hex Socket | 8 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 8 |
| 07***75 | Fitting,Grease (Without Lub. Piping) | 1 |
Service Kit And Component Parts
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Service Kit And Component Parts : Blade Lift Cylinder (Inner Parts)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***19 | Nut | 1 |
| 01***09 | Nut,(With Body Positioner) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Service Kit And Component Parts : Main Pump (Inner Parts)
| 01***32 | Washer, (Without Emergency Steering) | 4 |
| 04***20 | Pin,Dowel (Welded) | 4 |
| 04***15 | Ring, Snap | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Service Kit And Component Parts : Main Valve
| 07***23 | O-Ring,(F4350-66a1 -1c ) | 1 |
| 07***07 | Plug,Housing No.2?3?4?5?6 | 1 |
| 10***00 | Valve Ass'Y | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Service Kit And Component Parts : Main Valve (For Lift)
| NA***00 | Bowl | 4 |
| NA***01 | Plate | 1 |
| NA***01 | Valve Sub Ass'Y | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Service Kit And Component Parts : Main Valve (For Trimming)
| NA***71 | Spring | 1 |
| NA***01 | Case | 1 |
| NA***01 | Poppet | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Service Kit And Component Parts : Main Valve (Over Load Relief Valve)
| NA***04 | O-Ring,Back-Up | 2 |
| NA***21 | Valve Ass'Y,Safety | 1 |
| (1***0) | Valve Ass'Y,(See Fig. Y1680-41a0) | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Service Kit And Component Parts : Main Valve (Relife Valve)
| NA***10 | O-Ring | 1 |
| NA***01 | Nut | 1 |
| NA***01 | Spring | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Service Kit And Component Parts : Oversize Parts (For Track Link) (Lubricate Type) (Supply Only)
| 10***70 | Pin | 0 |
| 10***80 | Pin | 0 |
| 10***10 | Bushing | 0 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Service Kit And Component Parts : Oversize Parts (For Track Link) (Supply Only)
| 10***13 | Bushing,Regular | 0 |
| 10***33 | Bushing,Regular | 0 |
| 10***42 | Bushing,Master | 0 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Service Kit And Component Parts : Service Kit (F3-R3)
| 01***12 | Washer,(F2320-63a2 -13 ) | 1 |
| 07***08 | O-Ring,(F2320-53a3 -38 ) | 5 |
| 07***95 | O-Ring,Transmission Strainer | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Service Kit And Component Parts : Shoe Bolt And Nut Service Kit (Supply Only)
| 10***01 | Shoe Bolt And Nut K.,(For Swamp) | 1 |
| 10***12 | Bolt? Shoe (Y0320-K2) | 50 |
| 20***01 | Shoe Bolt And Nut K | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Service Kit And Component Parts : Track Link (Lubricate Type) (Supply Only)
| 07***22 | Plug,Large | 74 |
| 07***21 | Plug,(Small) | 74 |
| 10***21 | Link,Track? L.H | 72 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Service Kit And Component Parts : Track Link (Lubricate Type) (Supply Only) (For Swamp)
| 07***22 | Plug,Large | 74 |
| 07***21 | Plug,(Small) | 74 |
| 10***21 | Link,Track? L.H | 72 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Service Kit And Component Parts : Track Link (Supply Only)
| 10***21 | Link,Track? L.H | 74 |
| 10***31 | Link,Track? R.H | 74 |
| 10***44 | Bushing,Regular | 72 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Service Kit And Component Parts : Trimming Cylinder (Inner Parts)
| 01***22 | Nut,(North America Spec.) | 1 |
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
| 07***65 | O-Ring,(F5350-62a0 -14 ) | 1 |
Under Carriage
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Under Carriage : Carrier Roller
| 01***25 | Bolt,(For Shipping) | 1 |
| 01***25 | Bolt,(Rear Attachment Less) | 3 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Under Carriage : Front Idler (L.H.)(#78604-79244)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 12 |
| 01***30 | Bolt,(With Body Positioner) | 8 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Under Carriage : Front Idler (R.H.)(#78604-79244)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 12 |
| 01***30 | Bolt,(With Body Positioner) | 8 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Under Carriage : Front Idler(#79245-)
| 01***30 | Bolt,(With Body Positioner) | 8 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 2 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Under Carriage : Idler Cushion
| 01***16 | Bolt - Seat And Tether Belt Mounting | 6 |
| 01***35 | Capscrew - M14 (1)/(2) | 8 |
| 01***50 | Bolt,(For D60pl) | 12 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Under Carriage : Idler Cushiosn Rod
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 8 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Under Carriage : Track Frame
| 07***18 | Plug,(With Extinguisher) (D31p) | 12 |
| 10***30 | Plate (Welded) | 2 |
| 10***12 | Frame,Track? L.H | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Under Carriage : Track Frame Cover
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 12 |
| 01***32 | Washer,(With Auto Emergency Steering) | 12 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Under Carriage : Track Guard
| 01***25 | Capscrew | 24 |
| 01***35 | Capscrew - M14 (1)/(2) | 16 |
| 01***42 | Washer,Spring (For Pedal Steering), Washer-Spring | 40 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Under Carriage : Track Guard (Rubber Shoe Spec.)(#78604-79244)
| 01***30 | Bolt - M14 X 30lg | 16 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 16 |
| 07***18 | Plug,(With Extinguisher) (D31p) | 16 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Under Carriage : Track Guard (Rubber Shoe Spec.)(#79245-)
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Under Carriage : Track Guard (With Mono Block Type Track Roller Guard)
| 01***25 | Capscrew | 40 |
| 01***35 | Capscrew - M14 (1)/(2) | 16 |
| 01***85 | Bolt | 6 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Under Carriage : Track Roller
| 01***50 | Capscrew | 28 |
| 01***42 | Washer,Spring (For Pedal Steering), Washer-Spring | 28 |
| 07***38 | Ring, Seal - Between Sections | 2 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Under Carriage : Track Shoe (Lubricate Type) (Single Grouser With Hole) (300mm Wide)(#75001-)
| 07***22 | Plug,Large | 78 |
| 07***21 | Plug,(Small) | 78 |
| 10***21 | Link,Track? L.H | 76 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Under Carriage : Track Shoe (Master Pin Type) (Semi-Double Grouser With Hole) (300mm Wide)(#75001-76402)
| 10***21 | Link,Track? L.H | 78 |
| 10***31 | Link,Track? R.H | 78 |
| 10***44 | Bushing,Regular | 76 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Under Carriage : Track Shoe (Master Pin Type) (Single Grouser With Hole) (300mm Wide)(#75001-)
| 10***21 | Link,Track? L.H | 78 |
| 10***31 | Link,Track? R.H | 78 |
| 10***44 | Bushing,Regular | 76 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Under Carriage : Track Shoe (Master Pin Type) (Single Grouser) (300mm Wide)(#75001-)
| 10***21 | Link,Track? L.H | 78 |
| 10***31 | Link,Track? R.H | 78 |
| 10***44 | Bushing,Regular | 76 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Under Carriage : Track Shoe (Master Pin Type) (Triple Grouser With Hole) (300mm Wide)(#75001-)
| 10***21 | Link,Track? L.H | 78 |
| 10***31 | Link,Track? R.H | 78 |
| 10***44 | Bushing,Regular | 76 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Under Carriage : Track Shoe (Rubber Shoe Spec.) (300mm Wide)(#76527-)
| 10***10 | Shoe,Rubber | 2 |
Work Equipment
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Work Equipment : Blade
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 8 |
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Work Equipment : Dozer Frame (D21a)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***85 | Bolt, Divider Valve Mounting | 2 |
| 01***50 | Bolt,(For D60pl) | 24 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Work Equipment : Dozer Oil Line (Cover)
| 01***20 | Bolt,(For Mono Lever Steering) | 20 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 24 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Work Equipment : Dozer Oil Line (Lift Cylinder Line)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 2 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 6 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Work Equipment : Dozer Oil Line (Tilt Cylinder Line)
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 6 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Work Equipment : Drawbar
| 01***40 | Bolt | 2 |
| 01***45 | Washer,(Without R.O.P.S.) | 2 |
| 10***12 | Drawbar | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Work Equipment : Rear Guard
| 01***65 | Bolt,(For Shipping) | 10 |
| 01***45 | Washer,(Without R.O.P.S.) | 10 |
| 10***10 | Guard,Rear | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Work Equipment : Rear Guard (With Cab)
| 01***65 | Bolt,(For Shipping) | 10 |
| 01***45 | Washer,(Without R.O.P.S.) | 10 |
| 10***10 | Guard,Rear | 1 |
Komatsu : D21a-7t(S/N 78604-Up (Trimming Dozer (M/C))) : Work Equipment : Trimming Cylinder
| (1***0) | Cylinder Ass'Y,Trimming? L.H | 1 |
| (1***0) | Cylinder Ass'Y,Trimming? R.H | 1 |
D21A-7T(S/N 78604-UP (Trimming Dozer (m/c))) serial number reference
The PIN plate is located on the front frame casting, typically near the operator's left side. To read the prefix, locate the first three characters of the serial number sequence following the model designation.
| Prefix | Identifies | Notes |
|---|---|---|
| 78604-UP | D21A-7T (Trimming Dozer (m//c)) | Identifies the specific 'm/c' configuration of the D21A-7T series. This range is distinct from the 75001-78603 serial range. |
| 78604-UP | D21A-7T-M | Identifies the 'M' modification variant within the 78604-UP serial sequence. |
Frequently asked questions
What engine is used in the D21A-7T (S/N 78604-UP)?
The machine is powered by a Komatsu 4D95S, 4-cylinder diesel engine with a displacement of 2.7 L (164.2 cu in).
What is the operating weight of this model?
The standard operating weight is approximately 3,600 kg (7,936.7 lb).
What replaced the D21A-7 series?
The machine belongs to the Dash-7 generation; subsequent generations are identified by higher dash numbers (e.g., -8, -10) which feature different emissions tiers and technology.
What D21A-7T(S/N 78604-UP (Trimming Dozer (m/c))) owners discuss
What are the common steering and transmission issues reported for this model?
Operators report frequent failures on one side (left or right) due to dry steering clutches or hydraulic slave cylinder malfunctions. In powershift configurations, some users note a noticeable lag when shifting between first and second speed gears.
What undercarriage wear patterns should be monitored?
Significant wear on sprockets and bushings can occur even at relatively low usage levels, such as approximately 2,100 hours. The machine features 5 track rollers per side.
Are there known engine or starting issues for the D21A-7 series?
The machine may experience difficulty starting after periods of inactivity (e.g., two weeks), where it cranks but fails to produce exhaust smoke, typically indicating a fuel delivery problem. The 4D95S engine is a 4-cylinder diesel unit.
What electrical or sensor faults are common on this machine?
Common fault codes include E10 (engine controller power malfunction), E11 (reduced output due to high coolant temperature or low oil pressure), and E15 (sensor faults related to temperature, fuel, or oil pressure). Additionally, code AA10NX indicates air cleaner clogging.
What maintenance-related degradation is common for this specific design?
The use of protective covers can lead to dirt accumulation, which may cause rust and significant degradation of the underlying components. Regular cleaning of these covers is required to prevent damage.
What should be checked when inspecting a used D21A-7T(S/N 78604-UP) before purchase?
Verify the engine serial number on the block (typically near the injection pump) against the chassis plate to ensure no unauthorized replacements have occurred. Check for any discrepancy between the dashboard hour meter and telematics records, as a gap of more than 50 hours may indicate hour-meter rollback. Inspect all protective covers for dirt buildup and underlying rust.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Serial-range & configuration variants
This page covers the Komatsu D21A-7T(S/N 78604-UP (Trimming Dozer (m/c))). Related factory variants of the same model family:
D21A-7T(S/N 75001-78603-UP (Trimming Dozer))
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