Komatsubulldozersmall ( - d39)
Komatsu D21A-7T(S/N 75001-78603-UP (Trimming Dozer))
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu D21A-7T (S/N 75001-78603-UP) is a compact crawler dozer engineered 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 (29.8 kW) at 2450 rpm. The unit features a hydrostatic (HS) transmission with two forward and two reverse gears, providing efficient power flow for precision work.
Across the D21 series, advancements in the Dash-7 generation focused on Tier 3 / Stage IIIA emissions compliance and improved hydraulic control. This specific serial range remains significant in the used parts market due to its robust 4D95S engine architecture and the high demand for components like track rollers, sprockets, and hydrostatic transmission parts. Its specialized configuration as a trimming dozer makes it a durable choice for light construction and land management tasks.
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 75001-78603-UP (Trimming Dozer)) specifications
Engine
| Engine Model | 4D95S |
| Engine Make | Komatsu |
| Gross Power | 40 hp (29.8 kW) |
| Power Measured @ RPM | 2450 rpm |
| Number of Cylinders | 4 |
| Displacement | 164.2 cu in (2.7 L) |
Weights
| Operating Weight | 7,936.7 lb (3,600 kg) |
Dimensions
| Length w/ Blade | 11.16 ft (3.4 m) |
| Length w/o Blade | 8.4 ft (2.56 m) |
| Width Over Tracks | 5.29 ft - 64 in (1.61 m) |
| Height To Top of Cab | 8.13 ft (2.475 m) |
| Ground Clearance | 0.97 ft - 12 in (295 mm) |
| Length of Track on Ground | 5.53 ft - 67 in (1.685 m - 2 m) |
| Track Gauge | 4.3 ft - 52 in (1.31 m) |
| Standard Shoe Size | 11.82 in - 12 in (30 cm - 30.2 cm) |
| Track Pitch | 5 in - 5.4 in (13.5 cm - 13.7 cm) |
Performance
| Transmission Type | Hydrostatic (HS) |
| Number of Forward Gears | 2 |
| Number of Reverse Gears | 2 |
| Track Rollers Per Side | 5 |
Blades
| Standard Blade Width | 7.2 ft - 86 in (2.17 m - 2 m) |
| Standard Blade Height | 23 in (59 cm - 590 mm) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
D21A-7T(S/N 75001-78603-UP (Trimming Dozer)) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine Crankcase (w/ filter) | Not documented for this exact serial range — verify with your dealer | |
| Cooling System | Not documented for this exact serial range — verify with your and dealer | |
| Fuel Tank | Not documented for this exact serial range — verify with your dealer | |
| Transmission/Powertrain (Hydrostatic) | Not documented for this exact serial range — verify with your dealer | |
| Final Drives (each) | Not documented for this exact serial range — verify with your dealer | |
| Hydraulic System/Tank | Not documented for this exact serial range — verify with your dealer | |
| Grease | Not documented for this exact serial range — verify with your dealer |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu D21A-7T(S/N 75001-78603-UP (Trimming Dozer)) 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 75001-78603-UP (Trimming Dozer)) beyond the schedule
Predictive Maintenance & Fluid Analysis
Monitor engine oil and hydraulic fluid for particulate contamination to prevent hydrostatic transmission wear. Regularly check the battery electrolyte levels and terminal connections to ensure reliable starting. Use periodic analysis of engine coolant to detect internal leaks or degradation before they impact cooling efficiency. Maintaining clean air cleaner elements is critical to protecting the 4D95S engine from dust ingestion during grading operations.
Corrective & Common Repairs
Address steering difficulties by inspecting hydraulic controls and clutch engagement mechanisms. If track movement becomes uneven, investigate potential issues within the right track clutch or hydraulic control valves. Monitor for fluid leaks around brake pipes and hoses, as these can lead to loss of braking performance. Replace worn air cleaner elements promptly to prevent power loss and engine overheating in dusty environments.
Overhaul & Rebuild Points
Plan for valve clearance adjustments on the 4D95S engine during major service intervals to maintain optimal compression. When rebuilding the undercarriage, focus on replacing worn track rollers, sprockets, and bushings to restore proper track tension. Significant transmission overhauls should include a full inspection of planetary gears and hydrostatic components. Ensure all seals and hoses are renewed during any hydraulic system rebuild.
Seasonal & Environment Servicing
In high-dust environments, increase the frequency of air cleaner element inspections and cleaning. During cold weather operations, verify the functionality of the air cleaner temperature control and ensure engine coolant is at correct levels to prevent freezing. For machines operating in muddy or debris-heavy terrain, perform frequent underbody inspections to clear packed dirt from covers, preventing corrosion and component degradation.
D21A-7T(S/N 75001-78603-UP (Trimming Dozer)) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 600-311-1190 | Plate? Caution,Fuel Filter | Fuel system service | Check fitment → |
| 07281-00197 | Clamp,(With Pre-Fuel Filter) | Fuel system service | Check fitment → |
| 09637-90263 | Plate? Instruction,Air Cleaner Element Mainte | Air intake service | Check fitment → |
| 09637-30161 | Plate? Instruction,Air Cleaner (Single Element) | Air intake service | Check fitment → |
| 09637-30163 | Plate? Instruction,Air Cleaner (Single Element) | Air intake 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 75001-78603-UP (Trimming Dozer)) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| E10 | Engine controller power malfunction | Faulty ECM power connections, blown fuses, or improper grounding | Inspect ECM power connections, fuses, or ground wires |
| E11 | Engine protection—output power reduced | High coolant temperature, low oil pressure, or restricted air intake | Check coolant temperature, oil pressure, and air filter |
| E15 | Engine sensors fault | Malfunction in temperature, fuel pressure, or oil pressure sensors | Inspect engine sensors and associated wiring |
| AA10NX | Air cleaner clogging | Accumulated dust or debris in the air filter element | Replace the air filter |
| EOE | Network failure | Communication error within the machine's electronic network | Verify controller communication and wiring integrity |
| 989L00 | Engine controller lock warning (Mode 1) | Security or software lockout activation | Consult service manual for controller reset procedures |
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 75001-78603-UP (Trimming Dozer)) attachments & work tools
Blades
Standard blade width varies by configuration, with documented widths of 2.17 m (7.2 ft) and 2.18 m (86 in). Blade height is recorded at 0.59 m (23 in) to 0.6 m (23.3 in).
Rippers
The machine is engineered for performing ripping tasks; specific single-shank or multi-shank configuration details are not documented for this exact serial range.
Drawbars/counterweights
Specific drawbar or counterweight dimensions and weights for this serial range are not specified in the available factory documentation.
Hydraulic arrangement notes
The machine utilizes a hydrostatic (HS) transmission. The engine used is the Komatsu 4D95S, delivering 40 hp (29.8 kW) at 2450 rpm.
All D21A-7T(S/N 75001-78603-UP (Trimming Dozer)) assemblies by section
Every catalogued assembly group for the Komatsu D21A-7T(S/N 75001-78603-UP (Trimming Dozer)). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
4d95s-1j-T S/N 124813-Up
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Air Cleaner (With Pre-Cleaner)(#162320-)
| 01***16 | Bolt,(With Alternator Cover Type) | 2 |
| 01***06 | Nut | 6 |
| 04***10 | Ring,See Fig. K4010-65a0 | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Air Cleaner(#136990-)
| 01***16 | Bolt,(With Alternator Cover Type) | 2 |
| 01***06 | Nut | 6 |
| 04***10 | Ring,See Fig. K4010-65a0 | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Air Intake Manifold (With Pre-Cleaner)(#162320-)
| 01***65 | Stud | 1 |
| 01***65 | Bolt,(With Water Separator) | 5 |
| 01***75 | Bolt,(For Shipping) | 6 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Air Intake Manifold(#136990-)
| 01***65 | Stud | 1 |
| 01***65 | Bolt,(With Water Separator) | 5 |
| 01***75 | Bolt,(For Shipping) | 8 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Alternator (13a) (Inner Parts)(#136990-)
| 60***80 | Alternator A. (13a) | 1 |
| KD***31 | Bushing,Insulator | 2 |
| KD***80 | Packing | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Alternator Mounting (13a)(#136990-)
| 01***35 | Bolt,(Cold Weather Spec.) | 1 |
| 01***55 | Screw | 1 |
| 01***11 | Nut,(For Center Guard) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Block Heater (Cold Terrain Spec.)
| 01***25 | Bolt,(With Corrosion Resistor) | 4 |
| 60***90 | Heater,Water | 1 |
| 62***10 | Gasket,Plate (Except Japan) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Camshaft And Tappet
| 01***20 | Screw | 2 |
| 04***16 | Fitting Wedge | 1 |
| 62***31 | Thrust Washer | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Cooling Fan
| 01***25 | Bolt,(With Corrosion Resistor) | 4 |
| 01***30 | Bolt,(Water Separator Spec.) | 4 |
| 60***40 | Fan,Cooling | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Crank Pulley
| 01***35 | Bolt | 1 |
| 61***20 | Bolt | 1 |
| 62***40 | Pulley?Non Hardening,Crank (For Trimming Dozer) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Crankshaft(#136990-)
| 62***00 | Main Metal Ass'Y | 5 |
| 62***00 | Thrust Metal Ass'Y | 1 |
| 62***00 | Main Metal Ass'Y | 5 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Cylinder Block
| 04***20 | Pin,Dowel (Welded) | 2 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
| 04***08 | Adapter Sleeves | 6 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Cylinder Block (Cold Terrain Spec.)
| 04***20 | Pin,Dowel (Welded) | 2 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
| 04***08 | Adapter Sleeves | 6 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Cylinder Block Cover
| 01***14 | Bolt | 2 |
| 61***20 | Gasket,Plate | 1 |
| 62***10 | Plate | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Cylinder Block Cover (Cold Terrain Spec.)
| 01***14 | Bolt | 2 |
| 61***20 | Gasket,Plate | 1 |
| 62***10 | Plate | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Cylinder Block Gasket Kit(#.-)
| 01***12 | Washer,Lock (Noise Suppression Spec.) (K2) | 1 |
| 01***12 | Washer,Lock? Injection Gear | 1 |
| 07***18 | O-Ring,(See Fig.1601-29?1602-17) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Cylinder Block Gasket Kit(#124813-.)
| 07***65 | O-Ring,Injection Pump Case | 1 |
| 07***95 | O-Ring,Transmission Strainer | 1 |
| 07***35 | O-Ring,Hydraulic Oil Filter | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Cylinder Head
| 01***32 | Washer, (Without Emergency Steering) | 17 |
| 02***04 | Plug, Pipe | 1 |
| 07***10 | Plug, Expansion | 9 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Cylinder Head Gasket Kit(#.-)
| 07***90 | O-Ring,(Dk029369-0020) (K2) | 1 |
| 07***40 | O-Ring,Water Pump Mount | 1 |
| 08***14 | Band,(For Additional Fuel Strainer) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Cylinder Head Gasket Kit(#124813-.)
| 07***40 | O-Ring,Water Pump Mount | 1 |
| 08***14 | Band,(For Additional Fuel Strainer) | 1 |
| 08***19 | Band,(Without Air Conditioner) | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Engine Mounting
| 01***55 | Bolt,(See Service News) | 8 |
| 01***45 | Bolt, Bracket Mounting | 8 |
| 01***32 | Washer,(With Auto Emergency Steering) | 8 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Exhaust Manifold
| 01***25 | Grub Screw | 4 |
| 01***45 | Bolt, Bracket Mounting | 7 |
| 61***50 | Nut | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Exhaust Manifold (With Heat Shield)(#136990-)
| 01***25 | Grub Screw | 4 |
| 01***45 | Bolt, Bracket Mounting | 5 |
| 61***50 | Nut | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Flywheel
| 01***30 | Bolt | 6 |
| 06***04 | Bearing,Ball | 1 |
| 62***93 | Gear,Ring | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Flywheel Housing
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 11 |
| 61***32 | Seal? Rear (K2) | 1 |
| 62***70 | Housing,Flywheel | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Front Cover(#136990-)
| 01***10 | Bolt | 1 |
| 01***20 | Bolt,(With Tachometer Outlet) | 8 |
| 01***16 | Screw | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Front Hanger
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 62***30 | Hanger,Front (W/O Corrosion Resistor) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Front Power Take Off (For 13a? 25a Alternator)(#136990-)
| 06***07 | Bearing,Roller | 1 |
| 61***60 | Bearing,Ball | 1 |
| 62***00 | Shaft Ass'Y,Power Take Off | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Fuel Filter(#124813-157192)
| 01***65 | Bolt,(With Water Separator) | 2 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 6 |
| 07***14 | Bolt,Joint | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Fuel Filter(#157193-)
| 01***65 | Bolt,(With Water Separator) | 2 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 6 |
| 07***14 | Bolt,Joint | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Fuel Injection Pump (Feed Pump) (Inner Parts)(#136990-)
| DK***20 | Bolt, Joint | 1 |
| DK***00 | Valve,Check | 2 |
| DK***20 | Pump,Priming | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Fuel Injection Pump (Governor) (1/2) (Inner Parts)(#136990-)
| DK***70 | Governor Ass'Y | 1 |
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
| DK***00 | Adapter | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Fuel Injection Pump (Governor) (2/2) (Inner Parts)(#136990-)
| DK***20 | Lever | 1 |
| DK***40 | Gasket,Air Compressor | 2 |
| DK***20 | Capsule,Spring | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Fuel Injection Pump (Pump) (1/2) (Inner Parts)(#136990-)
| 62***60 | Injection Pump A | 1 |
| DK***30 | Bearing | 0 |
| DK***20 | Shim, 1.40mm; Was Dk029311-7220, Shim? 1.4mm | 0 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Fuel Injection Pump (Pump) (2/2) (Inner Parts)(#136990-)
| DK***40 | Shim? 0.50mm, Shim, 0.50mm; Was Dk029311-0040 | 0 |
| DK***90 | Shim? 0.25mm, Shim, 0.25mm; Was Dk029311-0590 | 0 |
| DK***20 | Plunger Ass'Y | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Fuel Injection Pump Lubricator
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 2 |
| 07***10 | Screw, Banjo Connector (M10-1.25x20) | 1 |
| 62***30 | Pipe,Oil | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Fuel Injection Pump Mounting(#136990-)
| 01***35 | Grub Screw | 4 |
| 01***12 | Bolt,(See Fig.0501) | 1 |
| 01***16 | Bolt,(With Alternator Cover Type) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Fuel Injection Pump Piping
| 01***12 | Bolt | 2 |
| 01***25 | Screw | 2 |
| 62***10 | Tube,Injection? No.1 | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Fuel Return(#124813-157192)
| 04***10 | Clip | 2 |
| 07***21 | Tube,Spill | 1 |
| 07***85 | Clip | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Fuel Return(#157193-)
| 04***08 | Clip | 1 |
| 07***00 | Clip | 1 |
| 62***10 | Cover | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Glow Plug
| 60***40 | Glow Plug,Glow | 4 |
| 62***10 | Lead | 3 |
| 62***11 | Wire | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Head Cover
| 01***14 | Screw | 1 |
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
| 04***50 | Screw | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Head Cover (With Water Separator)
| 01***14 | Screw | 1 |
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
| 04***50 | Screw | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Heat Shield(#136990-)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 2 |
| 01***45 | Screw | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Heater Signal
| 60***61 | Signal,Heater | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Idler Gear
| 01***70 | Bolt,(For 75a Alternator) | 1 |
| 04***20 | Ring, Snap | 1 |
| 06***06 | Bearing,Roller | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Inhibtor
| 60***20 | Inhibitor | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Injection Nozzle(#136990-157248)
| 01***35 | Bolt, Mount Bracket To Floor | 4 |
| 07***00 | Clip | 8 |
| 62***10 | Carrier | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Injection Nozzle(#157249-)
| 01***35 | Bolt, Mount Bracket To Floor | 4 |
| 07***00 | Clip | 9 |
| 62***10 | Carrier | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Muffler(#136990-)
| 01***12 | Bolt,(See Fig.0501) | 2 |
| 07***25 | Hose | 1 |
| 07***20 | Clamp,Hose | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Name Plate And Caution (Chinese)
| 09***61 | Plate? Instruction,(Chinese) (Not Shown) | 1 |
| 09***63 | Plate? Instruction,Air Cleaner Element Mainte | 1 |
| 60***20 | Plate? Caution,Oil Filter | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Name Plate And Caution (English)
| 09***61 | Plate? Instruction,Air Cleaner (Single Element) | 1 |
| 09***63 | Plate? Instruction,Air Cleaner (Single Element) | 1 |
| 60***30 | Plate? Caution,Oil Filter And Bypass Filter | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Name Plate And Caution (French)
| 09***62 | Plate? Instruction,Air Cleaner (Double Element) | 1 |
| 09***63 | Plate? Instruction,Air Cleaner Element Mainte | 1 |
| 60***90 | Plate? Caution,(French-English) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Name Plate And Caution (German)
| 09***61 | Plate? Instruction,(German-English) (Not Shown) | 1 |
| 09***63 | Plate? Instruction,Air Cleaner Element Mainte | 1 |
| 60***80 | Plate? Caution,(German-English) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Name Plate And Caution (Indonesian)
| 09***61 | Plate? Instruction,(Indonesian-English)(Not Shown | 1 |
| 09***63 | Plate? Instruction,(For Indonesia) | 1 |
| 60***50 | Plate? Caution,(Indonesian-English) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Name Plate And Caution (Italian)
| 09***61 | Plate? Instruction,(Italian-English) (Not Shown) | 1 |
| 09***63 | Plate? Instruction,(For Italian) | 1 |
| 60***20 | Plate? Caution,(Italian-English) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Name Plate And Caution (Russian)
| 09***63 | Plate? Instruction,Air Cleaner | 1 |
| 09***62 | Plate? Instruction,Air Cleaner (Double Element) | 1 |
| 60***50 | Plate? Caution,(Russian-English) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Name Plate And Caution (Spanish)
| 09***61 | Plate? Instruction,(Spanish-English) (Not Shown) | 1 |
| 09***63 | Plate? Instruction,(Spanish) (Not Shown) | 1 |
| 60***70 | Plate? Caution,Oil Filter And Bypass Filter | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Nozzle Holder (Inner Parts)(#136990-157248)
| 62***10 | Holder Ass'Y | 6 |
| DK***00 | Shim? 0.75mm | 0 |
| DK***00 | Shim? 1.200mm | 0 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Nozzle Holder (Inner Parts)(#157249-)
| 62***10 | Holder Ass'Y | 6 |
| DK***00 | Shim? 0.75mm | 0 |
| DK***00 | Shim? 1.200mm | 0 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Oil Filter
| 60***40 | Cartridge,Engine Oil Filter (D31s) | 1 |
| 60***41 | Cartridge,Engine Oil Filter (D31s) | 1 |
| 60***42 | Cartridge,Engine Oil Filter | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Oil Level Gauge(#136990-163445)
| 01***95 | Bolt,(For Shipping) | 1 |
| 01***20 | Bolt,(For Japan Pc200) | 1 |
| 61***20 | Spacer,(For Shipping) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Oil Level Gauge(#163446-)
| 01***95 | Bolt,(For Shipping) | 1 |
| 01***20 | Bolt,(For Japan Pc200) | 1 |
| 61***20 | Spacer,(For Shipping) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Oil Pan And Suction Tube(#136990-163445)
| 01***16 | Bolt, Mount Solenoid Valve | 24 |
| 01***12 | Bolt,(See Fig.0501) | 1 |
| 01***16 | Screw | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Oil Pan And Suction Tube(#163446-)
| 01***16 | Bolt, Mount Solenoid Valve | 24 |
| 01***12 | Bolt,(See Fig.0501) | 1 |
| 01***16 | Screw | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Oil Pressure Switch
| 08***05 | Switch,Engine Oil Pressure | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Oil Pressure Switch (Cold Terrain Spec.)
| 08***05 | Switch,Engine Oil Pressure | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Oil Pump
| 01***16 | Screw | 4 |
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
| 62***01 | Cover Ass'Y | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Oil Pump (Cold Terrain Spec.)
| 01***16 | Screw | 4 |
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
| 62***01 | Cover Ass'Y | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Piston(#136990-)
| 04***12 | Ring, Snap | 8 |
| 62***02 | Piston Ring Ass'Y,Per Cylinder | 4 |
| 62***10 | Pin,Piston | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Rear Hanger
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 62***10 | Hanger,Rear | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Rocker Arm
| 01***65 | Bolt,(For Alternator Bracket Mount) | 5 |
| 61***30 | Circlip | 2 |
| 62***00 | Shaft Ass'Y | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Spare Parts (For 13a Alternator)
| 04***46 | V-Belt,Cooling Fan | 1 |
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
| 60***41 | Cartridge,Engine Oil Filter (D31s) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Starting Motor (2.8kw) (Inner Parts)(#136990-162319)
| 60***40 | Starting Motor Ass'Y,(2.8kw) | 1 |
| KD***61 | Bracket,Center | 1 |
| KD***61 | Brush Holder A | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Starting Motor Mounting (2.8kw)(#136990-)
| 01***30 | Bolt | 2 |
| 07***95 | O-Ring,Transmission Strainer | 1 |
| 60***41 | Starting Motor Ass'Y,(2.8kw) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Stop Motor
| 01***16 | Bolt, Mounting Transmission Control Switch | 3 |
| 01***25 | Bolt - Relay Mounting | 3 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Water Pump
| 01***16 | Screw | 5 |
| 01***25 | Bolt - Relay Mounting | 2 |
| 01***20 | Screw | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Water Pump Pulley(#136990-)
| 04***46 | V-Belt,Cooling Fan | 1 |
| 62***10 | Pulley?Non Hardening | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : 4d95s-1j-T S/N 124813-Up : Water Separator
| 01***25 | Bolt,(With Corrosion Resistor) | 2 |
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 6 |
Control System
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Control System : Brake Pedal
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Control System : Brake Pedal (With Steel Cab)
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Control System : Brake Pedal (With Steel Cab)(For Mono Lever Steering)
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Control System : Brake Pedal Linkage (For Mono Lever Steering)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***45 | Bolt, Mounting Bracket To Radiator (Top) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Control System : Fuel Control Lever (For Mono Lever Steering)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***25 | Bolt | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Control System : Fuel Control Lever (For Mono Lever Steering) (With Steel Cab)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***25 | Bolt | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Control System : Inching Pedal
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 3 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Control System : Inching Pedal (With Steel Cab)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 3 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Control System : Inching Pedal Linkage
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***05 | Nut,L.H. (For Trimming Dozer) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Control System : Oil Cooler Piping
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***40 | Bolt, Mount Master Brake Cylinder | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Control System : P.P.C. Valve (For Mono Lever Steering)(#75001-76440)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 4 |
| 07***20 | O-Ring,Relief Valve | 4 |
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Control System : P.P.C. Valve (For Mono Lever Steering)(#76441-78603)
| 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 75001-78603-Up (Trimming Dozer)) : Control System : Steering Brake Cylinder (For Mono Lever Steering)
| 07***15 | O-Ring,(Without Boom Kickout) | 1 |
| 07***18 | O-Ring,(See Fig.1601-29?1602-17) | 1 |
| 07***34 | O-Ring, O-Ring,Drain Plug? R.H. Half Tank | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Control System : Steering Piping (Brake Cylinder Line) (For Mono Lever Steering)
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 4 |
| 01***11 | Nut - Mounting | 2 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Control System : Steering Piping (Steering Booster Line) (For Mono Lever Steering)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Control System : Steering Piping (Transmission Line) (For Mono Lever Steering)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Control System : Transmission Control Lever (1/3)
| 01***25 | Bolt,Without Revolution Sensor | 3 |
| 01***30 | Bolt,(For Mechanical Governor) | 10 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Control System : Transmission Control Lever (2/3)
| 01***30 | Bolt,(For Mechanical Governor) | 8 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Control System : Transmission Control Lever (3/3)
| 01***25 | Bolt,Without Revolution Sensor | 3 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Control System : Transmission Control Lever (3/3)(For Mono Lever Steering) (With Steel Cab)
| 01***25 | Bolt,Without Revolution Sensor | 3 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
Damper? Transmission? Steering And Final Drive
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Damper? Transmission? Steering And Final Drive : Bevel Gear And Shaft
| 01***30 | Bolt,(For Center Guard) | 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 75001-78603-Up (Trimming Dozer)) : Damper? Transmission? Steering And Final Drive : Brake
| 01***45 | Bolt, Mount Center Hinge Retainer (Upper) | 8 |
| 01***23 | Plain Washer | 2 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 8 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Damper? Transmission? Steering And Final Drive : Damper
| 01***16 | Bolt (With Air Heater & Conditioner) | 6 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 10 |
| 01***75 | Bolt,(For Adjusting) | 3 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Damper? Transmission? Steering And Final Drive : Final Drive Case(#75001-77124)
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
| 01***30 | Bolt,(With Body Positioner) | 16 |
| 01***70 | Bolt - Accumulator Mounting Bracket | 22 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Damper? Transmission? Steering And Final Drive : Final Drive Case(#77125-78603)
| 01***30 | Bolt,(With Body Positioner) | 16 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 8 |
| 01***70 | Bolt - Accumulator Mounting Bracket | 30 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Damper? Transmission? Steering And Final Drive : Final Drive Gear
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 16 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 16 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Damper? Transmission? Steering And Final Drive : Sprocket And Shaft
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***11 | Nut - Mounting | 24 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 8 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Damper? Transmission? Steering And Final Drive : Steering Case And Main Frame (For Mono Lever Steering)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 7 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 7 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Damper? Transmission? Steering And Final Drive : Steering Case Cover (For Mono Lever Steering)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Damper? Transmission? Steering And Final Drive : Steering Clutch
| 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 75001-78603-Up (Trimming Dozer)) : Damper? Transmission? Steering And Final Drive : Transmission (F3-R3) (1st Housing) (5/7)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***45 | Screw | 10 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Damper? Transmission? Steering And Final Drive : Transmission (F3-R3) (2nd Housing) (4/7)
| 01***08 | Screw | 1 |
| 04***15 | Ring,Back-Up | 1 |
| 04***20 | Ring, Snap | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Damper? Transmission? Steering And Final Drive : Transmission (F3-R3) (Case) (1/7)
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***35 | Bolt,(For Position Fixing) | 1 |
| 01***45 | Screw | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Damper? Transmission? Steering And Final Drive : Transmission (F3-R3) (Forward And 3rd Housing) (3/7)
| 04***24 | Pin,Dowel (For No.3 Housing) | 2 |
| 10***20 | Gear | 1 |
| 10***20 | Gear | 6 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Damper? Transmission? Steering And Final Drive : Transmission (F3-R3) (Pump) (7/7)
| 01***45 | Screw | 3 |
| 01***55 | Bolt,(10m) | 7 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Damper? Transmission? Steering And Final Drive : Transmission (F3-R3) (Reverse Housing) (2/7)
| 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 75001-78603-Up (Trimming Dozer)) : Damper? Transmission? Steering And Final Drive : Transmission (F3-R3) (Transfer) (6/7)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***75 | Bolt, Tube Mounting | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Damper? Transmission? Steering And Final Drive : Transmission Valve (F3-R3) (Modulation)
| 01***20 | Bolt,(With Auto Emergency Steering) | 5 |
| 01***60 | Bolt,(For Japan And Sweden) | 3 |
| 01***70 | Bolt (Op) | 5 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Damper? Transmission? Steering And Final Drive : Transmission Valve (F3-R3) (Selector And Inching)
| 01***25 | Bolt,Without Revolution Sensor | 2 |
| 01***50 | Bolt (Kit) | 8 |
| 01***75 | Bolt,(For Shipping) | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Damper? Transmission? Steering And Final Drive : Universal Joint
| 01***40 | Bolt,(With Air Conditioner) | 8 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 8 |
| 07***75 | Fitting,Grease (Without Lub. Piping) | 1 |
Engine Related Parts And Electrical System
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Engine Related Parts And Electrical System : Back-Up Buzzer
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Engine Related Parts And 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***10 | Terminal? (+) | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Engine Related Parts And Electrical System : Battery (Large Capacity Type)
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
| 08***10 | Terminal? (+) | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Engine Related Parts And Electrical System : Electrical System (With Key Stop Motor)
| 01***10 | Bolt,(With Auto Emergency Steering) | 1 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 10 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Engine Related Parts And Electrical System : Electrical System (Without Key Stop Motor)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 10 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Engine Related Parts And Electrical System : Engine Mounting Parts
| 01***10 | Bolt (Op) | 4 |
| 10***20 | Cushion | 4 |
| 10***30 | Cushion | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Engine Related Parts And Electrical System : Fuel Tank Additional Strainer And Piping
| 01***25 | Bolt,Without Revolution Sensor | 2 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Engine Related Parts And Electrical System : Fuel Tank And Piping
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 5 |
| 01***40 | Bolt,(With Service Valve R.H.) | 4 |
| 01***10 | Screw,(For Wiper Switch Earth) | 5 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Engine Related Parts And Electrical System : Fuel Tank And Piping (With Steel Cab)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***40 | Bolt,(With Service Valve R.H.) | 4 |
| 01***10 | Screw,(For Wiper Switch Earth) | 5 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Engine Related Parts And Electrical System : Instrument Panel (With Tachometer)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Engine Related Parts And Electrical System : Radiator And Piping (With Sandy Dusty Protection Grid)(#75001-78085)
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 5 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Engine Related Parts And Electrical System : Radiator And Piping (With Sandy Dusty Protection Grid)(#78086-78603)
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 5 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Engine Related Parts And Electrical System : Radiator And Piping(#75001-78085)
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 5 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Engine Related Parts And Electrical System : Radiator And Piping(#78086-78603)
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 5 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Engine Related Parts And Electrical System : Radiator Reservoir Tank
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***23 | Washer,(With Auto Emergency Steering) | 2 |
Guard
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Additional Work Lamp (With Steel Cab)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***10 | Nut,(Fig.F2820-01a3-12) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Air Conditioner (Air Compressor And Mounting) (4/6)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 7 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Air Conditioner (Air Compressor Piping) (5/6)
| 01***12 | Bolt | 1 |
| 01***25 | Bolt,(For Automatic) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Air Conditioner (Air Conditioner Unit Mounting) (1/6)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 16 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Air Conditioner (Air Duct And Control Panel) (3/6)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 10 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Air Conditioner (Condensor And Mounting) (2/6)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 7 |
| 01***20 | Bolt,(Without Maintenance Monitor) | 2 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 7 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Air Conditioner (Heater Piping) (6/6)
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***32 | Washer,(With Auto Emergency Steering) | 3 |
| 04***10 | Clip | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Air Conditioner Unit (Inner Parts)
| 11***10 | Air Conditioner Unit | 1 |
| TW***50 | Wiring Harness | 1 |
| TW***52 | Resistor | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Canopy (Canvas)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 8 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
| 01***35 | Bolt,R.H. Outside And L.H. Inside | 16 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Condensor
| 08***00 | Connector (Modify Air Dryer Lead) | 1 |
| 08***01 | Connector - At Radio Power Source And Speaker | 1 |
| 11***30 | Condenser | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Cross Bar
| 01***40 | Bolt,R.H. Outside And L.H. Inside, Bolt | 8 |
| 01***55 | Bolt,(For Reinforced Type) | 16 |
| 01***60 | Bolt,(For Ripper) | 16 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Head Guad
| 01***40 | Bolt,R.H. Outside And L.H. Inside, Bolt | 18 |
| 01***75 | Bolt | 24 |
| 01***42 | Washer,Spring (For Pedal Steering), Washer-Spring | 18 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Loader Frame And Floor Plate (For Mono Lever Steering)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 10 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Loader Frame And Floor Plate (With Steel Cab)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 13 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 16 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 7 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Operator'S Seat (With Oil Damper)(#75001-78085)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 16 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***35 | Bolt,R.H. Outside And L.H. Inside | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Operator'S Seat (With Oil Damper)(#78086-78603)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 13 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***35 | Bolt,R.H. Outside And L.H. Inside | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Operator'S Seat (With Steel Cab)
| 01***16 | Bolt (With Air Heater & Conditioner) | 3 |
| 01***25 | Bolt,Without Revolution Sensor | 8 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Operator'S Seat(#75001-76515)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 10 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***40 | Bolt,R.H. Outside And L.H. Inside, Bolt | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Operator'S Seat(#76516-78603)
| 01***25 | Bolt,Without Revolution Sensor | 8 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Radiator Guaro And Hood
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 8 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Radiator Guaro And Hood (For Pre Cleaner)
| 01***25 | Bolt,Without Revolution Sensor | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Radiator Guaro And Hood (For Spark Arester)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 8 |
| 01***20 | Screw | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Rear Cover And Hydraulic Tank
| 01***20 | Bolt,(With Auto Emergency Steering) | 3 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Rear Cover And Hydraulic Tank (With Steel Cab)
| 01***20 | Bolt,(With Auto Emergency Steering) | 3 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Rear Guard
| 01***65 | Bolt (D65p) | 10 |
| 01***45 | Washer,(Without R.O.P.S.) | 10 |
| 10***10 | Guard,Rear | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Room Mirror (With Steel Cab)
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
| 14***31 | Bracket | 1 |
| 14***40 | Mirror | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Rops Bracket
| 01***40 | Bolt,R.H. Outside And L.H. Inside, Bolt | 26 |
| 01***45 | Bolt, Mount Center Hinge Retainer (Upper) | 8 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 34 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Rops Canopy
| 01***80 | Washer,(For R.H. Steering) | 4 |
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Name,(Limited Supply) (Japanese) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Steel Cab (Body) (1/6)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***20 | Screw | 2 |
| 01***16 | Screw,(With Payload Meter) | 5 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Steel Cab (Door Lock) (3/6)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***25 | Bolt,Without Revolution Sensor | 8 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Steel Cab (Door) (2/6)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***30 | Bolt | 8 |
| 01***12 | Screw | 8 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Steel Cab (Electrical System ) (6/6)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***20 | Screw | 2 |
| 01***14 | Screw | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Steel Cab (Window) (4/6)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 4 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 8 |
| 01***12 | Screw,(With Articulate Indicator) | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Steel Cab (Wiper Motor) (5/6)
| 01***16 | Screw, Mount Parking Lights | 2 |
| 01***16 | Bolt - Starting Motor Ground Cable | 4 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 6 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Steel Cab Mount Bracket
| 01***35 | Bolt,R.H. Outside And L.H. Inside | 6 |
| 01***40 | Bolt,R.H. Outside And L.H. Inside, Bolt | 8 |
| 01***45 | Bolt, Mount Center Hinge Retainer (Upper) | 16 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Sunvisor (With Steel Cab)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 4 |
| 01***23 | Washer,(With Auto Emergency Steering) | 4 |
| 19***51 | Sun Visor | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Guard : Under Guard
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***30 | Bolt-Hex, Bolt,(With Center Guard) | 12 |
| 01***00 | Bolt | 2 |
Mark Plate? Tool And Kit
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Mark Plate? Tool And Kit : Accessory Parts
| 09***13 | Bag,Tool (D31s) | 1 |
| 09***50 | Overall,(Special Order) | 1 |
| 09***57 | Cap,(Special Order) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Mark Plate? Tool And Kit : Center Of Gravity Mark
| 09***01 | Plate? Mark,Keep A Safe Distance | 4 |
| 09***12 | Plate? Mark,Location Of Center Of Gravity | 2 |
| 11***10 | Table,Slinging Position | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Mark Plate? Tool And Kit : Marks And Plates (Chinese)
| 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 75001-78603-Up (Trimming Dozer)) : Mark Plate? Tool And Kit : Marks And Plates (English)
| 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 75001-78603-Up (Trimming Dozer)) : Mark Plate? Tool And Kit : Marks And Plates (Russian)
| 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 75001-78603-Up (Trimming Dozer)) : Mark Plate? Tool And Kit : 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 75001-78603-Up (Trimming Dozer)) : Mark Plate? Tool And Kit : 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 75001-78603-Up (Trimming Dozer)) : Mark Plate? Tool And Kit : Service Kit
| 01***12 | Washer,(F2320-63a2 -13 ) | 1 |
| 07***08 | O-Ring,(F2320-53a3 -38 ) | 5 |
| 07***95 | O-Ring,Transmission Strainer | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Mark Plate? Tool And Kit : 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 75001-78603-Up (Trimming Dozer)) : Mark Plate? Tool And Kit : Spare Parts (For 13a Altenator)
| 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 75001-78603-Up (Trimming Dozer)) : Mark Plate? Tool And Kit : Tool
| 07***50 | Pump, (Bellows Type) | 1 |
| 07***03 | Cartridge - Grease | 1 |
| 07***45 | Nozzle, Grease Pump (Non-Flexible Type) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Mark Plate? Tool And Kit : 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 75001-78603-Up (Trimming Dozer)) : Mark Plate? Tool And Kit : Track Link (Supply Only)
| 10***21 | Link,Track? L.H | 74 |
| 10***31 | Link,Track? R.H | 74 |
| 10***44 | Bushing,Regular | 72 |
Track
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Track : Carrier Roller
| 01***25 | Bolt,(For Slag Handling) | 1 |
| 01***25 | Bolt,Without Revolution Sensor | 3 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 8 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Track : Front Idler
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 12 |
| 01***30 | Bolt,(With Body Positioner) | 8 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Track : Recoil Spring
| 01***16 | Bolt (With Air Heater & Conditioner) | 10 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 8 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Track : Track Frame
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
| 01***25 | Bolt,(For Rubber Shoe) | 24 |
| 01***35 | Bolt,R.H. Outside And L.H. Inside | 16 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Track : Track Frame (Rubber Shoe Spec.)(#76527-78603)
| 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 75001-78603-Up (Trimming Dozer)) : Track : Track Frame (With Mono Block Type Track Roller Guard)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
| 01***25 | Bolt,(For Rubber Shoe) | 40 |
| 01***35 | Bolt,R.H. Outside And L.H. Inside | 16 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Track : Track Roller(#75001-77967)
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 12 |
| 01***45 | Bolt, Mount Center Hinge Retainer (Upper) | 48 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 12 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Track : Track Roller(#77968-78603)
| 01***50 | Bolt,(Shim Thickness?Less Than 8mm) | 48 |
| 01***42 | Washer,Spring (For Pedal Steering), Washer-Spring | 48 |
| 07***38 | Ring, Seal - Between Sections | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Track : Track Shoe (Lubricate Type) (Single Grouser With Hole) (300mm Wide)
| 07***22 | Plug,Large | 78 |
| 07***21 | Plug,(Small) | 78 |
| 10***21 | Link,Track? L.H | 76 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Track : 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 75001-78603-Up (Trimming Dozer)) : Track : Track Shoe (Master Pin Type) (Single Grouser With Hole) (300mm Wide)
| 10***21 | Link,Track? L.H | 78 |
| 10***31 | Link,Track? R.H | 78 |
| 10***44 | Bushing,Regular | 76 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Track : Track Shoe (Master Pin Type) (Single Grouser) (300mm Wide)
| 10***21 | Link,Track? L.H | 78 |
| 10***31 | Link,Track? R.H | 78 |
| 10***44 | Bushing,Regular | 76 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Track : Track Shoe (Master Pin Type) (Triple Grouser With Hole) (300mm Wide)
| 10***21 | Link,Track? L.H | 78 |
| 10***31 | Link,Track? R.H | 78 |
| 10***44 | Bushing,Regular | 76 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Track : Track Shoe (Rubber Shoe Spec.) (300mm Wide)(#76527-78603)
| 10***10 | Shoe,Rubber | 2 |
Work Equipment
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Work Equipment : Dozer Lock
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 8 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 8 |
| 10***10 | Rope,Wire | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Work Equipment : Hitch
| 01***40 | Bolt (Op) | 2 |
| 01***45 | Washer,(Without R.O.P.S.) | 2 |
| 10***12 | Drawbar | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Work Equipment : Hydraulic Piping (Tilt Cylinder Line) (Dozer Side)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 18 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 18 |
| 01***32 | Washer,(With Auto Emergency Steering) | 16 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Work Equipment : Trimming Cylinder
| 01***22 | Nut,(North America Spec.) | 1 |
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
| 07***65 | O-Ring,(F5350-62a0 -14 ) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Work Equipment : Trimming Dozer Blade
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 10 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 10 |
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Work Equipment : Trimming Dozer Frame
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***85 | Bolt,(For 2nd Travel Speed) (Op) | 2 |
| 01***50 | Bolt,(For Tbg/Abe Spec.) | 24 |
Work Equipment Control System
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Work Equipment Control System : Hydraulic Piping (Lift Cylinder Line)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Work Equipment Control System : Hydraulic Piping (Tank To Pump To Valve)
| 01***45 | Screw | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Work Equipment Control System : Hydraulic Piping (Tilt Cylinder Line) (Chassis Side)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Work Equipment Control System : Hydraulic Tank And Filter
| 01***25 | Bolt,Without Revolution Sensor | 7 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 7 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Work Equipment Control System : Lift Cylinder
| 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 75001-78603-Up (Trimming Dozer)) : Work Equipment Control System : Work Equipment Control Lever
| 01***16 | Bolt (With Air Heater & Conditioner) | 6 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Work Equipment Control System : Work Equipment Control Lever (1/2) (With Steel Cab) (Fro Single Lever)
| 01***16 | Bolt (With Air Heater & Conditioner) | 6 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Work Equipment Control System : Work Equipment Control Lever (2/2) (With Steel Cab) (Fro Single Lever)
| 01***16 | Bolt (With Air Heater & Conditioner) | 6 |
| 01***25 | Bolt,Without Revolution Sensor | 2 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 10 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Work Equipment Control System : Work Equipment Pump
| 01***75 | Bolt | 4 |
| 01***32 | Washer, (Without Emergency Steering) | 4 |
| 04***20 | Pin,Dowel (Welded) | 4 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Work Equipment Control System : Work Equipment Valve (1/2) (For Mono Lever Steering)
| 01***16 | Bolt (Op) | 4 |
| 01***25 | Bolt, Seal Cover Mounting | 2 |
| 01***30 | Bolt | 2 |
Komatsu : D21a-7t(S/N 75001-78603-Up (Trimming Dozer)) : Work Equipment Control System : Work Equipment Valve (2/2) (For Mono Lever Steering)
| 01***08 | Nut (Op) | 1 |
| 07***11 | O-Ring (Kit) | 1 |
| 07***14 | O-Ring,(F4350-61a0a-20 ) | 2 |
D21A-7T(S/N 75001-78603-UP (Trimming Dozer)) serial number reference
The PIN plate is located on the front frame casting, typically on the operator's left side near the radiator support. To read the prefix, identify the initial letter(s) at the start of the model designation (e.g., 'D' for Dozer).
| Prefix | Identifies | Notes |
|---|---|---|
| D | D21A-7T (Trimming Dozer) | Identifies the Crawler Dozer family. The numeric portion following the prefix indicates the size/weight class of the machine. |
Frequently asked questions
What engine powers this machine?
The Komatsu D21A-7T is equipped with a Komatsu 4D95S engine featuring 4 cylinders and a displacement of approximately 164.2 cu in (2.7 L).
What is the operating weight?
The standard operating weight for this configuration is approximately 7,936.7 lb (3,600 kg).
What replaced this model?
Specific successor models are not documented in the provided technical literature; however, it belongs to the Dash-7 generation of Komatsu crawler tractors.
What D21A-7T(S/N 75001-78603-UP (Trimming Dozer)) owners discuss
What are the common steering and clutch issues reported for the D21A-7 series?
Operators frequently report one-sided steering failures or track slipping. These issues often stem from a dry steering clutch or malfunctions in the hydraulic slave cylinder.
What engine is used in the Komatsu D21A-7T (S/N 75001-78603-UP), and what is its performance?
The machine utilizes a 4D95S engine. It delivers 40.0 hp (29.8 kW) at 2,450 rpm.
What undercarriage wear patterns should be expected on this machine?
Significant wear to sprockets and bushings can occur even at relatively low usage levels, such as approximately 2,100 hours. Additionally, users note difficulty releasing track tension to re-engage sprockets during maintenance.
Are there specific maintenance concerns regarding the machine's protective covers?
The machine uses covers to protect vulnerable components; however, these often pack with dirt. This accumulation can lead to rust and significant degradation of the underlying parts if not cleaned regularly.
What should be checked regarding the fuel system if the engine fails to start after being parked?
If the machine cranks but fails to start after a period of inactivity, investigate potential fuel delivery issues, as fuel may not be reaching the engine despite being present at the filter.
What is the most critical feature to verify when purchasing a used Komatsu D21A-7?
Verify the machine's history using available telematics systems. Compare recorded hours against the dashboard hour-meter and dealer service records; a discrepancy of more than approximately 50 hours is a signal of potential hour-meter rollback. Additionally, cross-check the riveted chassis plate serial number against the number stamped into the frame casting to ensure the machine has not been tampered with. Have your dealer verify all serial number matches and health reports.
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 75001-78603-UP (Trimming Dozer)). Related factory variants of the same model family:
D21A-7T(S/N 78604-UP (Trimming Dozer (m/c)))
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