Komatsubulldozersmall ( - d39)
Komatsu D20A-6(S/N 60001-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu D20A-6 (S/N 60001-UP) is a compact utility crawler tractor within the 3.5–4.2 tonne class. This narrow-track, direct-drive machine features a 4-cylinder 4D95S (4D95S-W-1) mechanical diesel engine producing approximately 40 hp (29.9 kW) at 2450 rpm. Part of the D20/D21-6 family, it serves as the successor to the D20A-5 and the predecessor to the D20A-7. The machine is configured with a 3-forward/2-reverse gear transmission and an operating weight of approximately 7826.5 lb (3550 kg).
The -6 series represents a specific generation in Komatsu's lineage, characterized by mechanical diesel systems prior to the widespread adoption of electronic ECU controls. This machine remains significant in the used parts market due to its robust, non-larva powertrain and high compatibility with D20/D21 series components. Its simple direct-drive architecture makes it a durable choice for utility work, provided that maintenance follows strict interval protocols to prevent common mechanical wear.
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 D20A-6(S/N 60001-UP) specifications
Engine
| Engine Model | Komatsu 4D95S (4D95S-W-1), naturally aspirated diesel |
| Number of Cylinders | 4 |
| Gross Power | 29.8–29.9 kW (40 hp) @ 2450 rpm |
| Displacement | 2.7 L (164.2 cu in) |
| Emissions Tier | Not documented for this serial range — pre-emissions-regulation era machine |
Weights
| Operating Weight | 3,550 kg (7,826.5 lb) |
Dimensions
| Length with Blade | 3,400 mm (11.16 ft) |
| Length without Blade | 2,550 mm (8.37 ft) |
| Width over Tracks | 1,610 mm (5.29 ft) |
| Height to Top of Cab | 2,475 mm (8.13 ft) |
| Ground Clearance | 295 mm (0.97 ft) |
| Track Length on Ground | 1,685 mm (5.53 ft) |
| Track Gauge | 1,310 mm (4.3 ft) |
| Standard Track Shoe Width | 300 mm (11.82 in) |
| Track Pitch | 135 mm (5.32 in) |
Undercarriage
| Number of Shoes per Side | 37 |
| Number of Track Rollers per Side | 5 |
Performance
| Transmission Type | Direct-drive (DD) power train; dry main-clutch and bevel-gear transmission |
| Number of Forward Gears | 3 |
| Number of Reverse Gears | 2 |
| Travel Speed (Forward/Reverse) | Not confirmed for this exact serial range — verify with your dealer |
| Drawbar Pull | Not documented in available factory spec sheets — verify with your dealer |
| Ground Pressure | Not confirmed for this exact serial range — verify with your dealer |
Blades
| Standard Blade Width | 2,170 mm (7.2 ft) |
| Standard Blade Height | 590 mm (23.3 in) |
| Blade Capacity | Approximately 0.76 m³ (1.0 cu yd) per D20A-5 reference |
Service Capacities
| Fuel Tank | 60 L (15.8 gal) |
| Cooling System | 10–13 L (2.6–3.5 gal) |
| Engine Oil (Crankcase) | 8 L specified (2.1 US gal); 7 L refill on filter change (1.8 US gal). Use SAE10W, SAE10W-30, SAE15W-40, or SAE30 based on temperature |
| Main Clutch Case | 6 L specified and refill (1.6 US gal). Use SAE10W |
| Transmission/Bevel Gear Case | 16.5 L specified and refill (4.4 US gal). Use SAE10W or SAE30 based on temperature |
| Final Drive Case (per side) | 6 L specified and refill (1.6 US gal) — capacity varies by configuration; verify with your dealer |
| Hydraulic Tank | 33 L specified and 21 L refill (8.7 US gal / 5.5 US gal) for D20A, 21A, E-6 group — capacity varies by configuration |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
D20A-6(S/N 60001-UP) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine Crankcase (w/ filter) | 8 L (2.1 US gal) specified; 7 L (1::85 US gal) refill on filter change | API CD (Note: API CC requires halved service intervals); SAE 10W (cold), SAE 10W-30 (medium), SAE 15W-40 or SAE 30 (warm) |
| Cooling System | 13 L (3.5 US gal) specified; 10 L (2.6 US gal) per fluid chart | Not documented for this exact serial range — verify with your dealer |
| Fuel Tank | 60 L (15.9 US gal) | Not documented for this exact serial range — verify with your dealer |
| Transmission/Powertrain (Main Clutch Case) | 6 L (1.58 US gal) specified/refill | Not documented for this exact serial range — verify with your dealer |
| Transmission/Powertrain (Bevel Gear/Steering Compartment) | 16.5 L (4.36 US gal) specified/refill | Not documented for this exact serial range — verify with your dealer |
| Final Drives (each) | 6 L (1.58 US gal) specified/refill per side | Not documented for this configuration |
| Hydraulic System/Tank | 33 L (8.72 US gal) specified; 21 L (5.55 US gal) refill | Not documented for this exact serial range — verify with your dealer |
| Grease | Not documented for this exact serial range — verify with your dealer | 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 D20A-6(S/N 60001-UP) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
Servicing the D20A-6(S/N 60001-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize oil wear analysis at every major service interval to monitor engine oil for wear metals like iron or copper. Regularly sample hydraulic fluid to check particle counts and viscosity changes. Monitor coolant for pH levels and SCA concentration to prevent internal corrosion. Tracking these laboratory-grade results allows for the detection of component fatigue before catastrophic failure occurs in the 4D95S engine or hydraulic pumps.
Corrective & Common Repairs
Address steering difficulties by inspecting the steering control valve and hydraulic lines for blockages. If the right track fails to move, check the final drive motor and sprocket wear. For loss of steering softness after operation, investigate potential pump failure or overheating issues in the hydraulic circuit. Monitor the electrical system for charging lamp activation, which often indicates worn alternator brushes or belt tension loss.
Overhaul & Rebuild Points
Plan major overhauls around the 4000-hour milestone, focusing on engine top-end components and clutch assembly. During transmission service, evaluate the dry main-clutch and bevel-gear integrity. For undercarriage rebuilds, measure track shoe wear and roller condition to determine replacement needs. Comprehensive structural inspections of boom and blade welds are critical during long-term rebuild cycles to ensure chassis integrity.
Seasonal & Environment Servicing
In cold weather operations, utilize the preheat cycle for 20–30 seconds and perform manual warm-ups. During high-dust environments, increase frequency of air filter inspections and clean radiator fins to prevent overheating. For heavy duty cycles, ensure all grease points on the blade and push arms are serviced more frequently. Always drain fuel water separators daily in high-moisture conditions to protect the 4D95S injection system.
D20A-6(S/N 60001-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 09637-30161 | Plate? Instruction,Air Cleaner (Single Element) | Air intake service | Check fitment → |
| 07000-02135 | O-Ring,Hydraulic Oil Filter | Hydraulic service | Check fitment → |
| 07000-02080 | O-Ring,Hydraulic Oil Filter | Hydraulic service | Check fitment → |
| 600-211-6240 | Cartridge,Engine Oil Filter (D31s) | Lubrication service | Check fitment → |
| 600-211-6241 | Cartridge,Engine Oil Filter (D31s) | Lubrication service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
D20A-6(S/N 60001-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CHARGE (Red) | Alternator not charging | Faulty alternator belt, worn brushes, regulator failure, or wiring issue | Inspect alternator belt tension, brushes, and electrical connections |
| OIL PRESSURE (Red) | Low engine lube oil pressure | Low oil level, pump failure, or clogged oil passages | Check engine oil level and inspect for leaks or filter blockages |
| Air Cleaner (Warning) | Air cleaner element is clogged/restricted | Excessive dust loading or heavy operation in dirty environments | Clean or tap out the air cleaner element; replace if restriction persists |
| Preheat (Warning) | Glow plug/preheat cycle active | Cold start procedure initiated for diesel engine | Allow preheat cycle to complete (typically 20-30 seconds) before starting |
| Coolant Temperature (Gauge) | Engine coolant temperature high/low | Radiator blockage, low coolant level, or thermostat failure | Check radiator fins for debris and verify coolant level in reservoir |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
D20A-6(S/N 60001-UP) attachments & work tools
Blades
Standard configuration features a 2,170 mm (7 ft 2 in) width and 590 mm (23.3 in) height blade. Available wear parts include cutting edges, end bits, side cutters, and wear strips.
Rippers
Ripper attachments are available for this model. Specific multi-shank or single-hand configurations and weights are not documented for this exact serial range — verify with your dealer.
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
Not documented for this exact serial range — verify with your dealer.
Hydraulic arrangement notes
The machine utilizes a hydraulic system designed for work equipment control. Specific front or rear tool hydraulic arrangements are not explicitly detailed in the available documentation.
All D20A-6(S/N 60001-UP) assemblies by section
Every catalogued assembly group for the Komatsu D20A-6(S/N 60001-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
4d95s-W-1f-A S/N 23318-Up
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Air Cleaner And Mounting
| 01***30 | Bolt,(Water Separator Spec.) | 1 |
| 01***16 | Bolt,(With Alternator Cover Type) | 2 |
| 01***06 | Nut | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Air Intake Manifold And Connection(#23318-30907)
| 01***65 | Stud | 1 |
| 01***65 | Bolt,(With Water Separator) | 3 |
| 01***75 | Bolt,(For Shipping) | 8 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Air Intake Manifold And Connection(#30908-)
| 01***65 | Stud | 1 |
| 01***12 | Bolt,(With Speedometer) | 4 |
| 01***65 | Bolt,(With Water Separator) | 3 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Alternator (15a)
| 60***60 | Alternator A. (15a) | 1 |
| KD***70 | Cover | 1 |
| KD***30 | Retainer | 2 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Alternator (25a)
| 60***10 | Alternator A. (25a) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***11 | Rear Bracket Ass'Y | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Alternator And Mounting (15a)
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
| 01***45 | Bolt | 1 |
| 01***06 | Nut | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Alternator And Mounting (25a)
| 01***55 | Bolt,(With Engine Stop Motor Type) | 1 |
| 01***30 | Bolt | 1 |
| 01***11 | Nut,(For Center Guard) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Camshaft And Tappet
| 01***20 | Screw | 2 |
| 04***16 | Fitting Wedge | 1 |
| 62***31 | Thrust Washer | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Crankshaft
| 61***20 | Bolt | 1 |
| 62***00 | Crankshaft Ass'Y | 1 |
| 62***00 | Main Metal Ass'Y | 5 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Cylinder Block
| 01***55 | Bolt, Mount Tube To Switch Pump | 8 |
| 01***16 | Screw | 1 |
| 01***20 | Screw | 2 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Cylinder Head
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 17 |
| 02***04 | Plug, Pipe | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Cylinder Head Cover
| 61***10 | Cap, Oil Filler | 1 |
| 61***20 | Screw | 3 |
| 61***30 | Washer,(B) | 3 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Exhaust Manifold And Muffler
| 01***25 | Grub Screw | 4 |
| 01***45 | Bolt, Bracket Mounting | 8 |
| 01***11 | Nut (M14-1.50 Thd), Nut; Was 01582-01411 | 2 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Exhaust Manifold And Muffler (With Spark Arrester)
| 01***25 | Grub Screw | 4 |
| 01***45 | Bolt, Bracket Mounting | 8 |
| 01***11 | Nut (M14-1.50 Thd), Nut; Was 01582-01411 | 2 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Flywheel And Flywheel Housing
| 01***30 | Bolt | 6 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 11 |
| 01***40 | Bolt,(Shim 3-Piece) | 3 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Front Cover And Gear
| 01***10 | Bolt | 1 |
| 01***70 | Bolt,(For 75a Alternator) | 1 |
| 01***16 | Bolt | 2 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Fuel Filter And Piping
| 01***65 | Bolt,(With Water Separator) | 2 |
| 07***12 | Gasket,Mechanical Pump Piping | 1 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 4 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Fuel Filter And Piping (For Large Capacity)(#56149-)
| 01***65 | Bolt,(With Water Separator) | 2 |
| 07***12 | Gasket,Mechanical Pump Piping | 1 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 4 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Fuel Injection Pump (Feed Pump)
| DK***20 | Bolt, Joint | 1 |
| DK***00 | Valve,Check | 2 |
| DK***20 | Pump,Priming | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Fuel Injection Pump (Governor) (1/2)
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
| DK***00 | Adapter | 1 |
| DK***80 | Nut | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Fuel Injection Pump (Governor) (2/2)
| DK***20 | Lever | 1 |
| DK***40 | Gasket,Air Compressor | 2 |
| DK***20 | Capsule,Spring | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Fuel Injection Pump (Pump) (1/2)
| 62***10 | Injection Pump Ass'Y | 1 |
| 62***11 | Injection Pump Ass'Y | 1 |
| DK***30 | Bearing | 0 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Fuel Injection Pump (Pump) (2/2)
| 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***00 | Sleeve,Control | 4 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Fuel Injection Pump And Piping
| 01***35 | Stud | 4 |
| 01***12 | Bolt | 2 |
| 01***25 | Screw | 2 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Fuel Nozzle And Spill Pipe
| 07***50 | Tube,Spill | 1 |
| 07***55 | Tube,Spill | 1 |
| 07***85 | Clip | 2 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Gasket Kit
| 01***12 | Washer,Lock (Noise Suppression Spec.) (K2) | 1 |
| 07***65 | O-Ring,Injection Pump Case | 1 |
| 07***85 | O-Ring,(Without Fuel Level Gauge) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Lubricating Oil Filter
| 60***40 | Cartridge,Engine Oil Filter (D31s) | 1 |
| 60***41 | Cartridge,Engine Oil Filter (D31s) | 1 |
| 60***20 | Plate? Caution,(Italian-English) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Lubricating Oil Pump And Suction Pipe
| 01***12 | Bolt,(See Fig.0501) | 1 |
| 01***16 | Screw | 6 |
| 01***55 | Bolt,(With Engine Stop Motor Type) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Oil Pan (Double Bottom Type)(#36389-74638)
| 01***16 | Bolt, Mount Solenoid Valve | 24 |
| 01***16 | Screw | 24 |
| 07***12 | Washer, Gasket,(Without Thermo Sensor) (K1) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Oil Pan (Double Bottom Type)(#74639-)
| 01***20 | Bolt,(Forwarded Individually Parts) | 24 |
| 07***12 | Washer, Gasket,(Without Thermo Sensor) (K1) | 1 |
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Oil Pan(#23318-74638)
| 01***16 | Bolt, Mount Solenoid Valve | 24 |
| 01***16 | Screw | 24 |
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Oil Pan(#74639-)
| 01***20 | Bolt,(Forwarded Individually Parts) | 24 |
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
| 62***12 | Pan,Oil | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Piston And Connecting Rod
| 04***12 | Ring, Snap | 8 |
| 62***40 | Piston (S) | 4 |
| 62***00 | Piston Ring Ass'Y,Per Cylinder | 4 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Rocker Arm
| 01***12 | Bolt,(Without R.P.C.U.) | 1 |
| 01***65 | Bolt,(For Alternator Bracket Mount) | 5 |
| 61***30 | Nut | 8 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Starting Motor (2.8kw)
| 60***70 | Starting Motor Ass'Y,(2.8kw) | 1 |
| KD***60 | Bracket,Center | 1 |
| KD***50 | Stopper,Piston | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Starting Motor And Mounting (2.8kw)
| 01***30 | Bolt | 2 |
| 07***95 | O-Ring,Transmission Strainer | 1 |
| (6***0) | Starting Motor Ass'Y,(2.8kw) (See Fig.A6210-B0b3) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Water Pump And Cooling Fan
| 01***16 | Screw | 5 |
| 01***20 | Screw | 2 |
| 01***25 | Bolt,(With Corrosion Resistor) | 6 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-A S/N 23318-Up : Water Separator And Piping(#43240-)
| 01***80 | Stud | 2 |
| 01***25 | Bolt,(With Corrosion Resistor) | 2 |
| 01***08 | Nut,See Fig. K4010-04a0 | 2 |
4d95s-W-1f-T S/N 23318-Up
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Air Cleaner And Mounting
| 01***30 | Bolt,(Water Separator Spec.) | 1 |
| 01***16 | Bolt,(With Alternator Cover Type) | 2 |
| 01***06 | Nut | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Air Intake Manifold And Connection(#23318-30907)
| 01***65 | Stud | 1 |
| 01***65 | Bolt,(With Water Separator) | 3 |
| 01***75 | Bolt,(For Shipping) | 8 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Air Intake Manifold And Connection(#30908-)
| 01***65 | Stud | 1 |
| 01***12 | Bolt,(With Speedometer) | 4 |
| 01***65 | Bolt,(With Water Separator) | 3 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Alternator (13a)
| 60***80 | Alternator A. (13a) | 1 |
| KD***31 | Bushing,Insulator | 2 |
| KD***80 | Packing | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Alternator And Mounting (13a)
| 01***35 | Bolt,(Cold Weather Spec.) | 1 |
| 01***55 | Screw | 1 |
| 01***11 | Nut,(For Center Guard) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Camshaft And Tappet
| 01***20 | Screw | 2 |
| 04***16 | Fitting Wedge | 1 |
| 62***31 | Thrust Washer | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Crankshaft
| 61***20 | Bolt | 1 |
| 62***00 | Crankshaft Ass'Y | 1 |
| 62***00 | Main Metal Ass'Y | 5 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Cylinder Block
| 01***55 | Bolt, Mount Tube To Switch Pump | 8 |
| 01***16 | Screw | 1 |
| 01***20 | Screw | 2 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Cylinder Head
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 17 |
| 02***04 | Plug, Pipe | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Cylinder Head Cover
| 61***10 | Cap, Oil Filler | 1 |
| 61***20 | Screw | 3 |
| 61***30 | Washer,(B) | 3 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Exhaust Manifold And Muffler
| 01***25 | Grub Screw | 4 |
| 01***45 | Bolt, Bracket Mounting | 8 |
| 61***80 | Gasket,Exhaust Manifold | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Flywheel And Flywheel Housing
| 01***30 | Bolt | 6 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 11 |
| 01***40 | Bolt,(Shim 3-Piece) | 3 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Front Cover And Gear
| 01***10 | Bolt | 1 |
| 01***70 | Bolt,(For 75a Alternator) | 1 |
| 01***20 | Bolt,(With Tachometer Outlet) | 8 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Fuel Filter And Piping
| 01***65 | Bolt,(With Water Separator) | 2 |
| 07***12 | Gasket,Mechanical Pump Piping | 1 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 4 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Fuel Filter And Piping (For Large Capacity)(#56149-)
| 01***65 | Bolt,(With Water Separator) | 2 |
| 07***12 | Gasket,Mechanical Pump Piping | 1 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 4 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Fuel Injection Pump (Feed Pump)
| DK***20 | Bolt, Joint | 1 |
| DK***00 | Valve,Check | 2 |
| DK***20 | Pump,Priming | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Fuel Injection Pump (Governor) (1/2)
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
| DK***00 | Adapter | 1 |
| DK***80 | Nut | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Fuel Injection Pump (Governor) (2/2)
| DK***20 | Lever | 1 |
| DK***40 | Gasket,Air Compressor | 2 |
| DK***20 | Capsule,Spring | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Fuel Injection Pump (Pump) (1/2)
| 62***30 | Injection Pump Ass'Y | 1 |
| 62***31 | Injection Pump Ass'Y | 1 |
| DK***30 | Bearing | 0 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Fuel Injection Pump (Pump) (2/2)
| 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***00 | Sleeve,Control | 4 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Fuel Injection Pump And Piping
| 01***35 | Stud | 4 |
| 01***12 | Bolt | 2 |
| 01***25 | Screw | 2 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Fuel Nozzle And Spill Pipe
| 07***50 | Tube,Spill | 1 |
| 07***55 | Tube,Spill | 1 |
| 07***85 | Clip | 2 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Gasket Kit
| 01***12 | Washer,Lock (Noise Suppression Spec.) (K2) | 1 |
| 07***65 | O-Ring,Injection Pump Case | 1 |
| 07***85 | O-Ring,(Without Fuel Level Gauge) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Lubricating Oil Cooler
| 01***25 | Bolt,(With Corrosion Resistor) | 4 |
| 01***30 | Bolt,(Water Separator Spec.) | 7 |
| 01***50 | Bolt,(With Corrosion Resistor) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Lubricating Oil Filter
| 01***25 | Bolt,(With Corrosion Resistor) | 4 |
| 07***12 | Washer, Gasket,(Without Thermo Sensor) (K1) | 1 |
| 60***40 | Cartridge,Engine Oil Filter (D31s) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Lubricating Oil Pump And Suction Pipe
| 01***12 | Bolt,(See Fig.0501) | 1 |
| 01***16 | Screw | 6 |
| 01***55 | Bolt,(With Engine Stop Motor Type) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Oil Pan
| 01***16 | Bolt, Mount Solenoid Valve | 22 |
| 01***16 | Screw | 22 |
| 01***30 | Bolt,(Water Separator Spec.) | 2 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Piston And Connecting Rod
| 04***12 | Ring, Snap | 8 |
| 62***40 | Piston (S) | 4 |
| 62***00 | Piston Ring Ass'Y,Per Cylinder | 4 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Rocker Arm
| 01***12 | Bolt,(Without R.P.C.U.) | 1 |
| 01***65 | Bolt,(For Alternator Bracket Mount) | 5 |
| 61***30 | Nut | 8 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Starting Motor (2.8kw)
| 60***40 | Starting Motor Ass'Y,(2.8kw) | 1 |
| KD***61 | Bracket,Center | 1 |
| KD***61 | Brush Holder A | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Starting Motor And Mounting (2.8kw)
| 01***30 | Bolt | 2 |
| 07***95 | O-Ring,Transmission Strainer | 1 |
| (6***0) | Starting Motor Ass'Y,(2.8kw) (See Fig.A6210-B0b3) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Water Pump And Cooling Fan
| 01***16 | Screw | 5 |
| 01***25 | Bolt - Relay Mounting | 2 |
| 01***20 | Screw | 2 |
Komatsu : D20a-6(S/N 60001-Up) : 4d95s-W-1f-T S/N 23318-Up : Water Separator And Piping(#43240-)
| 01***80 | Stud | 2 |
| 01***25 | Bolt,(With Corrosion Resistor) | 2 |
| 01***08 | Nut,See Fig. K4010-04a0 | 2 |
Control System
Komatsu : D20a-6(S/N 60001-Up) : Control System : Brake Pedal (For Lever Steering)
| 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 : D20a-6(S/N 60001-Up) : Control System : Brake Pedal Linkage
| 01***45 | Bolt, Mounting Bracket To Radiator (Top) | 1 |
| 01***06 | Nut? L.H. Thread,L.H. Thread (For Chinese) | 2 |
| 01***06 | Nut,L.H. Thread (For Russian) | 2 |
Komatsu : D20a-6(S/N 60001-Up) : Control System : Fuel Control Lever
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 5 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***04 | Nut,(For Air Conditioner Less) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Control System : Main Clutch Pedal (For Lever Steering)
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
Komatsu : D20a-6(S/N 60001-Up) : Control System : Main Clutch Pedal (For Pedal Steering)
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
Komatsu : D20a-6(S/N 60001-Up) : Control System : Oil Cooler Piping
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***40 | Bolt, Mount Master Brake Cylinder | 2 |
Komatsu : D20a-6(S/N 60001-Up) : Control System : Parking Brake Lever (For Pedal Steering)
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
| 01***45 | Bolt, Mounting Bracket To Radiator (Top) | 1 |
| 01***70 | Bolt,(With Wear Guard) | 2 |
Komatsu : D20a-6(S/N 60001-Up) : Control System : Steering And Brake Pedal (For Pedal Steering)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 4 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 2 |
Komatsu : D20a-6(S/N 60001-Up) : Control System : Steering Control Lever (For Lever Steering)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : D20a-6(S/N 60001-Up) : Control System : Steering Control Linkage (For Lever Steering)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***32 | Screw | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Control System : Steering Pedal Linkage (For Pedal Steering)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***32 | Screw | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Control System : Steering Piping
| 01***16 | Bolt (With Air Heater & Conditioner) | 1 |
| 01***50 | Bolt (Kit) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : D20a-6(S/N 60001-Up) : Control System : Steering Valve (For Lever Steering)
| 01***20 | Bolt,(With Auto Emergency Steering) | 8 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***70 | Bolt, Accumulator Mounting Bracket | 3 |
Komatsu : D20a-6(S/N 60001-Up) : Control System : Steering Valve (For Pedal Steering)
| 01***20 | Bolt,(With Auto Emergency Steering) | 8 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***70 | Bolt, Accumulator Mounting Bracket | 3 |
Engine Related Parts And Electrical System
Komatsu : D20a-6(S/N 60001-Up) : 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 : D20a-6(S/N 60001-Up) : Engine Related Parts And Electrical System : Battery (Dry 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 : D20a-6(S/N 60001-Up) : 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 : D20a-6(S/N 60001-Up) : Engine Related Parts And Electrical System : Electrical System
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 1 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 10 |
Komatsu : D20a-6(S/N 60001-Up) : Engine Related Parts And Electrical System : Electrical System (With Rops Cab)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 1 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 9 |
Komatsu : D20a-6(S/N 60001-Up) : Engine Related Parts And Electrical System : Engine Mounting Parts
| 01***10 | Bolt (Op) | 4 |
| 10***20 | Cushion | 4 |
| 10***30 | Cushion | 4 |
Komatsu : D20a-6(S/N 60001-Up) : Engine Related Parts And Electrical System : Fuel Tank Additional Strainer And Piping
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***50 | Bolt,(With Service Valve R.H.) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Engine Related Parts And Electrical System : Fuel Tank And Piping
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
Komatsu : D20a-6(S/N 60001-Up) : Engine Related Parts And Electrical System : Fuel Tank And Piping (With Rops Cab)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
Komatsu : D20a-6(S/N 60001-Up) : Engine Related Parts And Electrical System : Instrument Panel (For Lever Steering)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***08 | Screw, Terminal | 2 |
Komatsu : D20a-6(S/N 60001-Up) : Engine Related Parts And Electrical System : Instrument Panel (For Lever Steering) (Cold Weather (A) Spec.)
| 01***12 | Bolt,(With Cylinder Cover) | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
Komatsu : D20a-6(S/N 60001-Up) : Engine Related Parts And Electrical System : Instrument Panel (For Lever Steering) (For Quick Heater)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***08 | Screw, Terminal | 2 |
Komatsu : D20a-6(S/N 60001-Up) : Engine Related Parts And Electrical System : Instrument Panel (For Lever Steering) (With Rops Cab)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***08 | Screw, Terminal | 2 |
Komatsu : D20a-6(S/N 60001-Up) : Engine Related Parts And Electrical System : Instrument Panel (For Lever Steering) (With Tachometer)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : D20a-6(S/N 60001-Up) : Engine Related Parts And Electrical System : Instrument Panel (For Pedal Steering)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***08 | Screw, Terminal | 2 |
Komatsu : D20a-6(S/N 60001-Up) : Engine Related Parts And Electrical System : Instrument Panel (For Pedal Steering) (With Vandalism Protection)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***08 | Screw, Terminal | 2 |
Komatsu : D20a-6(S/N 60001-Up) : Engine Related Parts And Electrical System : Oil Pan Heater (Cold Weather (A) Spec.)
| 01***16 | Bolt (With Air Heater & Conditioner) | 1 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Engine Related Parts And Electrical System : Quick Heater Glow Plug
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***12 | Screw,(With Articulate Indicator) | 4 |
Komatsu : D20a-6(S/N 60001-Up) : Engine Related Parts And Electrical System : Radiator And Piping
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 7 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
Komatsu : D20a-6(S/N 60001-Up) : Engine Related Parts And Electrical System : Radiator And Piping (For Large Capacity Radiator)
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 7 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
Komatsu : D20a-6(S/N 60001-Up) : Engine Related Parts And Electrical System : Radiator Shutter
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***16 | Screw,(Sandy And Dusty Terrain S.) | 4 |
| 01***03 | Nut,(With Joy Stick Steering) | 4 |
Guard
Komatsu : D20a-6(S/N 60001-Up) : 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 : D20a-6(S/N 60001-Up) : Guard : Canopy(#60001-60938)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 8 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Canopy(#60939-67009)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 12 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Canopy(#67010-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 12 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 8 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Cross Bar (For Angle Dozer)
| 01***40 | Bolt,R.H. Outside And L.H. Inside, Bolt | 8 |
| 01***45 | Bolt,(For Travel Motor) (Not Show) | 16 |
| 01***45 | Bolt | 8 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Cross Bar (For Power Angle Power Tilt Dozer)
| 01***40 | Bolt,R.H. Outside And L.H. Inside, Bolt | 8 |
| 01***45 | Bolt,(For Travel Motor) (Not Show) | 16 |
| 01***45 | Bolt | 8 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Head Guard
| 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 : D20a-6(S/N 60001-Up) : Guard : Loader Frame And Floor Plate (For Lever Steering) (For Angle Dozer)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***55 | Bolt,(For Reinforced Type) | 12 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Loader Frame And Floor Plate (For Lever Steering) (For Power Angle Power Tilt Dozer) : Unit_02_of_02
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***55 | Bolt,(For Reinforced Type) | 12 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Loader Frame And Floor Plate (For Lever Steering) (For Power Angle Power Tilt Dozer) : Unit_01_of_02
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***55 | Bolt,(For Reinforced Type) | 12 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Loader Frame And Floor Plate (For Pedal Steering) (For Power Angle Power Tilt Dozer)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***35 | Bolt,R.H. Outside And L.H. Inside | 2 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Loader Frame And Floor Plate (With Rops Cab)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***55 | Bolt,(For Reinforced Type) | 12 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Operator'S Seat (Rigid Type) (For Lever Steering)
| 01***25 | Bolt,Without Revolution Sensor | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 10 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Operator'S Seat (Rigid Type) (For Pedal Steering)
| 01***25 | Bolt,Without Revolution Sensor | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 10 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Operator'S Seat (With Oil Damper)
| 01***25 | Bolt,Without Revolution Sensor | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 16 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Radiator Guard And Hood (For Angle Dozer)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 11 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***50 | Bolt,(For Strengthened Cover) | 16 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Radiator Guard And Hood (For Power Angle Power Tilt Dozer)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 11 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 8 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Radiator Guard And Hood (With Engine Side Cover) (For Power Angle Power Tilt Dozer)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 11 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 8 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Rear Cover And Hydraulic Tank (With Rops Cab)
| 01***20 | Bolt,(With Auto Emergency Steering) | 3 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Rear Cover And Hydraulic Tank(#60001-63964)
| 01***20 | Bolt,(With Auto Emergency Steering) | 3 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Rear Cover And Hydraulic Tank(#63965-)
| 01***20 | Bolt,(With Auto Emergency Steering) | 3 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***40 | Bolt,(With Service Valve R.H.) | 4 |
Komatsu : D20a-6(S/N 60001-Up) : 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***42 | Washer,Spring (For Pedal Steering), Washer-Spring | 34 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Rops Cab (1/5) (Body)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***16 | Screw,(Sandy And Dusty Terrain S.) | 6 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Rops Cab (2/5) (Front And Rear Window)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 4 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 6 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Rops Cab (3/5) (Door And Side Window)
| 01***20 | Bolt,(Without Maintenance Monitor) | 4 |
| 01***45 | Bolt | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 10 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Rops Cab (4/5) (Electrical System)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 8 |
| 01***12 | Screw,(Additional Sun Visor) | 1 |
| 01***20 | Screw - Turn Signal And Parkinglight Mounting | 2 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Rops Cab (5/5) (Mounting Parts)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 9 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***19 | Washer,Spring (With Extinguisher) (D31p) | 9 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Rops Canopy
| 01***80 | Washer,(For R.H. Steering) | 4 |
| 10***10 | Guard,Rops Canopy | 1 |
| 10***10 | Pad,Rear | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Under Guard
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***30 | Bolt-Hex, Bolt,(With Center Guard) | 12 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 3 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Under Guard (For Front Hook)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***30 | Bolt-Hex, Bolt,(With Center Guard) | 12 |
| 01***45 | Bolt, Mount Center Hinge Retainer (Upper) | 6 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Under Guard (Reinforced Type)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***30 | Bolt-Hex, Bolt,(With Center Guard) | 12 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 3 |
Komatsu : D20a-6(S/N 60001-Up) : Guard : Water Valve (For Car Heater)
| 07***59 | Clamp,See Fig. K4010-05a0 | 4 |
| 09***00 | Valve | 1 |
| 10***20 | Hose | 2 |
Main Clutch?Transmission? Steering And Final Drive
Komatsu : D20a-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Bevel Gear And Shaft
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 6 |
| 01***30 | Bolt,(For Trimming Dozer) | 10 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 6 |
Komatsu : D20a-6(S/N 60001-Up) : Main Clutch?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 : D20a-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Final Drive Case
| 01***30 | Bolt,(With Body Positioner) | 16 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 4 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 8 |
Komatsu : D20a-6(S/N 60001-Up) : Main Clutch?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 : D20a-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Inertia Brake
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 5 |
Komatsu : D20a-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Main Clutch Case
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***25 | Bolt,Without Revolution Sensor | 4 |
| 01***30 | Bolt,(For Mechanical Governor) | 4 |
Komatsu : D20a-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Main Clutch Plate
| 01***10 | Bolt, Mount Flasher | 6 |
| 01***16 | Bolt (Welded) | 6 |
| 01***45 | Bolt,(For Suction? Reversible Fan) | 3 |
Komatsu : D20a-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Main Clutch Pump
| 04***15 | Ring, Snap | 1 |
| 07***01 | Pump Ass'Y (Fal10) | 1 |
| 07***60 | Seal,Oil | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Main Clutch Pump Drive And Relief Valve
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***70 | Bolt, Mount Bracket And Oil Inlet Tube, Bolt | 4 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 8 |
Komatsu : D20a-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Main Clutch Yoke
| 01***30 | Bolt,(For France Noise Suppression) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 2 |
Komatsu : D20a-6(S/N 60001-Up) : Main Clutch?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 : D20a-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Steering Case And Main Frame (For Angle Dozer)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 11 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 11 |
Komatsu : D20a-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Steering Case And Main Frame (For Power Angle Power Tilt Dozer)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 11 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 11 |
Komatsu : D20a-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Steering Case Cover
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***50 | Bolt,(With Service Valve R.H.) | 18 |
Komatsu : D20a-6(S/N 60001-Up) : Main Clutch?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 : D20a-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Transmission (1/5) (Case)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***40 | Bolt, Mount Master Brake Cylinder | 2 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 5 |
Komatsu : D20a-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Transmission (1/5) (Case) (For Forestry)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***40 | Bolt, Mount Master Brake Cylinder | 2 |
Komatsu : D20a-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Transmission (2/5) (Main Shaft And Gear)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***10 | Nut | 1 |
| 01***10 | Nut | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Transmission (2/5) (Main Shaft And Gear) (For Forestry)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***10 | Nut | 1 |
| 01***10 | Nut | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Transmission (3/5) (Intermediate Shaft And Gear)
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 3 |
Komatsu : D20a-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Transmission (3/5) (Intermediate Shaft And Gear) (For Forestry)
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 3 |
Komatsu : D20a-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Transmission (4/5) (Counter Shaft And Gear)
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***40 | Bolt, Mount Master Brake Cylinder | 3 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 3 |
Komatsu : D20a-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Transmission (4/5) (Counter Shaft And Gear) (For Forestry)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***40 | Bolt, Mount Master Brake Cylinder | 3 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 3 |
Komatsu : D20a-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Transmission (5/5) (Shift Lever And Fork)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***12 | Screw,(With Articulate Indicator) | 4 |
| 01***20 | Screw,Set | 3 |
Komatsu : D20a-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Transmission (5/5) (Shift Lever And Fork) (For Forestry)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***12 | Screw,(With Articulate Indicator) | 4 |
| 01***20 | Screw,Set | 3 |
Komatsu : D20a-6(S/N 60001-Up) : Main Clutch?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 |
Mark Plate? Tool And Kit
Komatsu : D20a-6(S/N 60001-Up) : Mark Plate? Tool And Kit : Accessory Parts (Except Japan)
| 11***11 | Seat,Chassis | 1 |
Komatsu : D20a-6(S/N 60001-Up) : 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 : D20a-6(S/N 60001-Up) : Mark Plate? Tool And Kit : Marks And Plates (English) (For Ksp)
| 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 : D20a-6(S/N 60001-Up) : Mark Plate? Tool And Kit : Marks And Plates (Spanish)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Inspection And Maintenance | 1 |
| 09***35 | Plate? Name,(Limited Supply) (Spanish) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Mark Plate? Tool And Kit : Spare Parts (Except Japan)
| 07***85 | O-Ring,(Without Fuel Level Gauge) | 1 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 4 |
| 07***22 | Plug,Steering Case | 8 |
Komatsu : D20a-6(S/N 60001-Up) : Mark Plate? Tool And Kit : Tool (Except Japan)
| 07***50 | Pump, (Bellows Type) | 1 |
| 07***03 | Cartridge - Grease | 1 |
| 07***45 | Nozzle, Grease Pump (Non-Flexible Type) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Mark Plate? Tool And Kit : Vandalism Protection
| 07***20 | Cap,(Lock Type) | 1 |
| 09***02 | Lock,(With Vandalism Protection) | 1 |
| 09***03 | Lock | 1 |
Track
Komatsu : D20a-6(S/N 60001-Up) : 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 : D20a-6(S/N 60001-Up) : Track : Front Idler
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 12 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 2 |
Komatsu : D20a-6(S/N 60001-Up) : Track : Recoil Spring (Reinforced Type)
| 01***30 | Bolt,(For Mechanical Governor) | 4 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 8 |
| 01***35 | Bolt, Hydraulic Tank Mounting | 12 |
Komatsu : D20a-6(S/N 60001-Up) : Track : Recoil Spring(#60001-62543)
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 8 |
| 01***40 | Bolt,R.H. Outside And L.H. Inside, Bolt | 8 |
Komatsu : D20a-6(S/N 60001-Up) : Track : Recoil Spring(#62544-)
| 01***30 | Bolt,(For Mechanical Governor) | 4 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 8 |
| 01***35 | Bolt, Hydraulic Tank Mounting | 12 |
Komatsu : D20a-6(S/N 60001-Up) : Track : Track Frame (With Mono Block Type Track Roller Guard) (For Power Angle Power Tilt Dozer)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 10 |
| 01***25 | Bolt,(For Rubber Shoe) | 36 |
| 01***35 | Bolt,R.H. Outside And L.H. Inside | 16 |
Komatsu : D20a-6(S/N 60001-Up) : Track : Track Frame (With Separate Type Track Roller Guard) (For Angle Dozer)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 10 |
| 01***25 | Bolt,(For Rubber Shoe) | 24 |
| 01***35 | Bolt,R.H. Outside And L.H. Inside | 16 |
Komatsu : D20a-6(S/N 60001-Up) : Track : Track Frame (With Separate Type Track Roller Guard) (For Power Angle Power Tilt Dozer)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 10 |
| 01***25 | Bolt,(For Rubber Shoe) | 24 |
| 01***35 | Bolt,R.H. Outside And L.H. Inside | 16 |
Komatsu : D20a-6(S/N 60001-Up) : Track : Track Roller
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 12 |
| 01***45 | Bolt, Mount Center Hinge Retainer (Upper) | 48 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 12 |
Komatsu : D20a-6(S/N 60001-Up) : Track : Track Shoe (Lubricate Type) (Single Grouser With Hole)
| 01***18 | Nut? Shoe (Kit) | 304 |
| 07***22 | Plug,Large | 78 |
| 07***21 | Plug,(Small) | 78 |
Komatsu : D20a-6(S/N 60001-Up) : Track : Track Shoe (Lubricate Type) (Single Grouser)
| 01***18 | Nut? Shoe (Kit) | 338 |
| 07***22 | Plug,Large | 74 |
| 07***21 | Plug,(Small) | 74 |
Komatsu : D20a-6(S/N 60001-Up) : Track : Track Shoe (Lubricate Type) (Triple Grouser With Hole)
| 01***18 | Nut? Shoe (Kit) | 338 |
| 07***22 | Plug,Large | 74 |
| 07***21 | Plug,(Small) | 74 |
Komatsu : D20a-6(S/N 60001-Up) : Track : Track Shoe (Master Pin Type) (Flat Type With Hole)
| 01***18 | Nut? Shoe (Kit) | 346 |
| 10***20 | Link,Track? L.H | 74 |
| 10***21 | Link,Track? L.H | 74 |
Komatsu : D20a-6(S/N 60001-Up) : Track : Track Shoe (Master Pin Type) (Semi-Double Grouser With Hole)
| 01***18 | Nut? Shoe (Kit) | 362 |
| 10***21 | Link,Track? L.H | 78 |
| 10***31 | Link,Track? R.H | 78 |
Komatsu : D20a-6(S/N 60001-Up) : Track : Track Shoe (Master Pin Type) (Single Grouser With Hole)
| 01***18 | Nut? Shoe (Kit) | 312 |
| 10***06 | Track Shoe Ass'Y | 1 |
| 10***07 | Track Shoe Ass'Y | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Track : Track Shoe (Master Pin Type) (Single Grouser)
| 01***18 | Nut? Shoe (Kit) | 312 |
| 10***07 | Track Shoe Ass'Y | 1 |
| 10***08 | Track Shoe Ass'Y | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Track : Track Shoe (Master Pin Type) (Snow Type With Hole)
| 01***18 | Nut? Shoe (Kit) | 346 |
| 10***20 | Link,Track? L.H | 74 |
| 10***21 | Link,Track? L.H | 74 |
Komatsu : D20a-6(S/N 60001-Up) : Track : Track Shoe (Master Pin Type) (Triple Grouser With Hole)
| 01***18 | Nut? Shoe (Kit) | 312 |
| 10***20 | Link,Track? L.H | 74 |
| 10***21 | Link,Track? L.H | 78 |
Work Equipment
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment : Angle Blade
| 01***45 | Washer | 2 |
| 02***40 | Bolt,(Pl) | 20 |
| 02***13 | Nut,(Pl) | 20 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment : Angle Cylinder (For Power Angle Power Tilt Dozer)
| 04***20 | Ring, Snap | 4 |
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
| 07***65 | O-Ring,(F5350-62a0 -14 ) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment : Angle Tilt Blade (For Power Angle Power Tilt Dozer)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 8 |
| 02***40 | Bolt,(Pl) | 18 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment : Angle Tilt Frame (For Power Angle Power Tilt Dozer)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 10 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***60 | Bolt, Mount Pole | 6 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment : C-Frame
| 01***55 | Bolt,(10m) | 2 |
| 01***45 | Bolt, Mount Center Hinge Retainer (Upper) | 12 |
| 01***15 | Bolt (Kit) | 4 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment : Dozer Lock (For Power Angle Power Tilt Dozer)
| 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 : D20a-6(S/N 60001-Up) : Work Equipment : Hitch
| 01***40 | Bolt (Op) | 2 |
| 01***45 | Washer,(Without R.O.P.S.) | 2 |
| 10***12 | Drawbar | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment : Hydraulic Piping (Angle Cylinder Line) (Dozer Side) (For Power Angle Power Tilt Dozer)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 3 |
| 07***12 | O-Ring (Itl) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment : Hydraulic Piping (Tilt Cylinder Line) (Dozer Side) (For Power Angle Power Tilt Dozer)
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
| 01***35 | Bolt,(For Position Fixing) | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment : Hydraulic Piping Cover (For Power Angle Power Tilt Dozer)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 9 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 2 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment : Swing Drawbar
| 01***45 | Bolt (Op) | 10 |
| 01***45 | Washer,(Without R.O.P.S.) | 10 |
| 04***12 | Pin,Cotter (For Ripper) | 2 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment : Tilt Cylinder (For Power Angle Power Tilt Dozer)
| 01***18 | Bolt | 1 |
| 01***32 | Washer, (Without Emergency Steering) | 1 |
| 04***20 | Ring, Snap | 4 |
Work Equipment Control System
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment Control System : Hydraulic Piping (Angle Cylinder Line) (Chassis Side)
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***09 | Nut,(With Body Positioner) | 2 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment Control System : Hydraulic Piping (Lift Cylinder Line) (For Power Angle Power Tilt Dozer)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment Control System : Hydraulic Piping (Lift Cylinder Line) (For Angle Dozer)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment Control System : Hydraulic Piping (Tank To Pump To Valve)
| 01***30 | Bolt,(For Mechanical Governor) | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment Control System : Hydraulic Piping (Tilt Cylinder Line) (Chassis Side)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***09 | Nut,(With Body Positioner) | 4 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment Control System : Hydraulic Tank And Filter (For Angle Dozer)
| 01***25 | Bolt,Without Revolution Sensor | 7 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***30 | Bolt? Wing,Inspection Cover | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment Control System : Hydraulic Tank And Filter (For Power Angle Power Tilt Dozer)
| 01***25 | Bolt,Without Revolution Sensor | 7 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***30 | Bolt? Wing,Inspection Cover | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment Control System : Lift Cylinder (For Angle Dozer)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***25 | Bolt | 1 |
| 01***09 | Nut (Itl) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment Control System : Lift Cylinder (For Power Angle Power Tilt Dozer)
| 01***40 | Bolt, Mount Master Brake Cylinder | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment Control System : Work Equipment Control Lever (1/2) (For Power Angle Power Tilt Dozer)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 8 |
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment Control System : Work Equipment Control Lever (2/2) (For Power Angle Power Tilt Dozer)
| 01***05 | Nut,L.H. Thread (D31s) | 1 |
| 01***05 | Nut,L.H. (For Trimming Dozer) | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment Control System : Work Equipment Control Lever (For Angle Dozer)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 8 |
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment Control System : Work Equipment Pump
| 04***15 | Ring, Snap | 1 |
| 70***10 | Seal, Oil | 1 |
| 70***70 | Plate | 1 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment Control System : Work Equipment Valve (1/2) (For Angle Dozer)
| 01***16 | Bolt (Op) | 4 |
| 01***25 | Bolt, Seal Cover Mounting | 2 |
| 01***30 | Bolt | 2 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment Control System : Work Equipment Valve (2/2) (For Angle Dozer)
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment Control System : Work Equipment Valve (For Power Angle Power Tilt Dozer) (1/2)
| 01***16 | Bolt (Op) | 8 |
| 01***25 | Bolt, Seal Cover Mounting | 2 |
| 01***30 | Bolt | 2 |
Komatsu : D20a-6(S/N 60001-Up) : Work Equipment Control System : Work Equipment Valve (For Power Angle Power Tilt Dozer) (2/2)
| 01***08 | Nut (Op) | 1 |
| 07***11 | O-Ring (Kit) | 1 |
| 07***14 | O-Ring,(F4350-61a0a-20 ) | 1 |
D20A-6(S/N 60001-UP) serial number reference
Locate the serial number plate on the front frame casting, typically positioned on the operator's left side near the radiator support. For this specific model range, identify the machine by matching the numeric sequence on the plate to the 60001-UP range. Cross-check the riveted plate against the chassis-engraved serial to ensure they match.
| Prefix | Identifies | Notes |
|---|---|---|
| None (Numeric) | D20A-6 | The D20A-6 uses a purely numeric sequential build identifier starting at 60001. It does not utilize a three-character alpha prefix. The serial number is typically 5 digits (e.g., 60001) or a 17-character ISO PIN on export models. |
Frequently asked questions
What engine is used in the D20A-6?
The machine is powered by a Komatsu 4D95S (specifically the 4D95S-W-1) 4-cylinder, naturally aspirated mechanical diesel engine with a 2.7 L displacement.
What is the operating weight of this model?
The standard operating weight for the D20A-6 is approximately 7826.5 lb (3550 kg).
What machine replaced the D20A-6?
The D20A-6 was succeeded by the Komatsu D20A-7.
What D20A-6(S/N 60001-UP) owners discuss
What are the common engine performance issues reported for the D20A-6?
Engine compression drops can lead to power loss and engine misfires. The machine uses a Komatsu 4D95S (4D95S-W-1) 4-cylinder mechanical diesel engine with approximately 2.7 L displacement and 40 hp (29.8–29.9 kW) power output.
What hydraulic or steering behaviors should be monitored during operation?
Loss of soft steering on both sides has been reported after extended operation, even following pump replacement. Additionally, loss of steering power can occur after extended use. For right track movement failures, inspect the steering control valve and hydraulic lines for leaks or blockages.
What are the known risks regarding the steering clutch assembly?
Steering clutches are prone to failure; specifically, dry clutches can rust and weld shut due to moisture exposure. Some instances of clutches stalling the engine have also been reported.
What undercarriage or drive components require inspection for wear?
Inspect the final drive motor and track drive sprocket for damage or wear. For right track drive failure, check the steering valve and hydraulic lines. The machine features a 37-shoe per side configuration with a 135.12 mm (5.32 in) track pitch.
What electrical warning indicators are present on this model?
As a pre-electronic ECU era machine, it uses analog gauges and warning lamps rather than digital fault codes. Key indicators include red lamps for CHARGE (alternator/wiring issues) and OIL PRESSURE (low lube oil pressure), as well as Air Cleaner and Preheat lamps.
What should be checked when buying a used Komatsu D20A-6 (S/N 60001-UP)?
Verify that the riveted serial number plate on the front frame casting matches the serial number stamped into the chassis frame. A mismatch between these two is a primary signal for stolen equipment or restamped frames.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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