Komatsubulldozersmall ( - d39)
Komatsu D20S-6(S/N 60001-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu D20S-6 (S/N 60001-UP) is a compact crawler bulldozer designed for utility and light earthmoving applications. This machine belongs to the D series and features a 4D95S-W engine, delivering approximately 29.5 kW (39.6 hp) of net power. With an operating weight of roughly 3.79 t (8,356 lb), it is configured for maneuverability in tight construction sites. The series includes various configurations such as the D20A and D2/D21 variants, often utilized in landscaping or small-scale excavation.
The -6 generation represents a significant era in Komatsu's utility dozer development, bridging the gap between older mechanical systems and more modern emissions-regulated builds. This machine remains highly relevant in the used parts and machinery market today because of its robust 4D95S engine and widely available components shared across the D20/D21 series. Its durability and the availability of high-quality replacement parts make it a primary choice for fleet owners seeking economical maintenance.
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 D20S-6(S/N 60001-UP) specifications
Engine
| Engine Model | Komatsu 4D9/4D106 series (varies by configuration) |
| Net Power | 29.5 kW (39.6 hp) |
| Displacement | 2.69 L (0.71 US gal) |
| Engine Speed at Max Torque | 2,450 rpm |
| Cylinders | 4 |
Weights
| Operating Weight | 3.79 t (8,356 lb) |
Dimensions
| Transport Length | 3.49 m (11.5 ft) |
| Transport Width | 1.61 m (5.28 ft) |
| Transport Height | 2.155 m (7.07 ft) |
| Track Width | 300 mm (11.8 in) |
Performance
| Travel Speed | 7.5 km/h (4.66 mph) |
| Soil Pressure | 0.37 kg/cm² |
Service Capacities & Fluids
| Engine Oil Specification | Komatsu EO |
| Hydraulic Oil Specification | Komatsu HO |
| Axle Oil Specification | Komatsu AXO |
| Transmission Oil Specification | Komatsu TO |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
D20S-6(S/N 60001-UP) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine Crankcase | not specified | Komatsu diesel engine oil (per Komatsu genuine lubricants guide) |
| Cooling System | 13.0 L - 13.6 L | Komatsu super coolant |
| Transmission/Powertrain | 23.09 L (6.1 gal) | Komatsu powertrain oil |
| Final Drives | not specified | Komatsu axle oil |
| Hydraulic System/Tank | not specified | Komatsu hydraulic oil |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu D20S-6(S/N 60001-UP) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the D20S-6(S/N 60001-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Monitor engine oil and hydraulic fluid for particulate contamination to prevent pump wear. Regularly check the 4D95S-W engine's coolant quality to avoid radiator scaling. Use Komatsu genuine lubricants, such as Komatsu EO or AXO, to maintain strict engineering standards. Analyzing transmission fluid during 2000h intervals can identify early signs of internal component degradation before catastrophic failure occurs.
Corrective & Common Repairs
Address hydraulic leaks at fittings immediately to prevent pressure loss in the HST system. Inspect track tension frequently; improper adjustment causes accelerated undercarriage wear. If engine power drops, check for fuel filter clogging or air intake restrictions. Ensure all electrical connections are secure to prevent sensor-related fault codes that can disrupt machine operation during critical tasks.
Overhaul & Rebuild Points
Plan major overhauls around the 2000h milestone, focusing on the engine and power train. Inspect the 4D95S-W engine for compression loss or excessive blow-by. During undercarriage rebuilds, evaluate the condition of track shoes, rollers, and idlers. Rebuilding the hydraulic system requires thorough cleaning of all valves and cylinders to ensure the machine maintains its rated soil pressure.
Seasonal & Environment Servicing
During cold weather operation, implement extended warm-up periods for the diesel engine and hydraulic oil. In dusty environments, increase frequency of air cleaner inspections and radiator cleaning to prevent overheating. For summer use, ensure the cooling system is free of debris. Always check battery health and terminal corrosion before seasonal storage to ensure reliable starting in all climates.
D20S-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 → |
| 09637-30661 | 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 → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
D20S-6(S/N 60001-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| E10 | Engine controller power malfunction | Faulty ECM power connections, blown fuses, or defective ground wires | Inspect ECM power connections, fuses, and ground wires |
| E11 | Engine protection—output power reduced | High coolant temperature, low oil pressure, or clogged air filter | Check coolant temperature, oil pressure, and air filter status |
| CA115 | Engine crankshaft speed sensor failure | Broken sensor, wiring harness damage, or connector corrosion | Replace the speed sensor and verify voltage at the pin connector |
| CA122 | Intake air pressure high voltage | Faulty intake pressure sensor or wiring issues | Verify the intake pressure sensor and associated wiring |
| CA123 | Intake air pressure low voltage | Sensor short circuit or airflow restriction | Check for sensor shorts or physical airflow obstructions |
| CA451 | Common rail pressure error | Malfunction in the fuel rail pressure sensor or fuel pump lines | Diagnose the fuel rail pressure sensor and inspect pump lines |
| AA10NX | Air cleaner clogging | Accumulated dust or debris in the air filter element | Replace the air filter |
| B@BCNS | Engine coolant overheating | Low coolant level, radiator fin blockage, or fan belt failure | Check radiator fins, fan belt, and coolant level |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
D20S-6(S/N 60001-UP) attachments & work tools
Blades
Standard blade width is 7.2 ft (2.2 m) with a height of 23.3 in (591.8 mm). Tilt device availability is not documented for this exact serial range — verify with your dealer.
Rippers
Rear ripper is not listed as a published feature for this configuration. Multi-shank or single-hand weight specifications are not provided in the available documentation.
Winches
No winch class or towing winch options are specified for the D20S-6 (S/N 60001-UP) in the retrieved technical data.
Drawbars/counterweights
Specific drawbar pull or counterweight configuration details are not documented for this specific serial range.
Cab/ROPS guarding options
Standard configuration includes a ROPS cabin. Fuel tank components are noted as available with ROPS cab configurations. Specific forestry or waste guarding options are not listed.
Hydraulic arrangement notes
Soil pressure is rated at 0.37 kg/cm². No specific details regarding auxiliary hydraulic arrangements for front or rear tools are provided in the source text.
All D20S-6(S/N 60001-UP) assemblies by section
Every catalogued assembly group for the Komatsu D20S-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-S S/N 23318-Up
Komatsu : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S S/N 23318-Up : Alternator (15a)
| 60***60 | Alternator A. (15a) | 1 |
| KD***70 | Cover | 1 |
| KD***30 | Retainer | 2 |
Komatsu : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S S/N 23318-Up : Alternator And Mounting (15a)
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
| 01***45 | Bolt | 1 |
| 01***06 | Nut | 1 |
Komatsu : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S S/N 23318-Up : Camshaft And Tappet
| 01***20 | Screw | 2 |
| 04***16 | Fitting Wedge | 1 |
| 62***31 | Thrust Washer | 1 |
Komatsu : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S S/N 23318-Up : Crankshaft
| 61***20 | Bolt | 1 |
| 62***00 | Crankshaft Ass'Y | 1 |
| 62***00 | Main Metal Ass'Y | 5 |
Komatsu : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S S/N 23318-Up : Cylinder Block
| 01***55 | Bolt, Mount Tube To Switch Pump | 8 |
| 01***16 | Screw | 1 |
| 01***20 | Screw | 2 |
Komatsu : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S S/N 23318-Up : Cylinder Head Cover
| 61***10 | Cap, Oil Filler | 1 |
| 61***20 | Screw | 3 |
| 61***30 | Washer,(B) | 3 |
Komatsu : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S S/N 23318-Up : Front Cover And Gear
| 01***10 | Bolt | 1 |
| 01***70 | Bolt,(For 75a Alternator) | 1 |
| 01***16 | Bolt | 2 |
Komatsu : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S S/N 23318-Up : Fuel Injection Pump And Piping
| 01***35 | Stud | 4 |
| 01***12 | Bolt | 2 |
| 01***25 | Screw | 2 |
Komatsu : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S S/N 23318-Up : Fuel Nozzle And Spill Pipe
| 07***50 | Tube,Spill | 1 |
| 07***55 | Tube,Spill | 1 |
| 07***85 | Clip | 2 |
Komatsu : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-6(S/N 60001-Up) : 4d95s-W-1f-S 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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-6(S/N 60001-Up) : Control System : Steering Piping
| 01***20 | Bolt,(With Auto Emergency Steering) | 1 |
| 01***50 | Bolt (Kit) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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***00 | Terminal? (+),(10l) (Not Shown) | 2 |
Komatsu : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-6(S/N 60001-Up) : Engine Related Parts And Electrical System : Instrument Panel (For Lever Steering) (Cold Weather (A) Spec.) (Except Japan)
| 01***12 | Bolt,(With Cylinder Cover) | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
Komatsu : D20s-6(S/N 60001-Up) : Engine Related Parts And Electrical System : Instrument Panel (For Lever Steering) (For Quick Heater Glow Plug)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***08 | Screw, Terminal | 2 |
Komatsu : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-6(S/N 60001-Up) : Engine Related Parts And Electrical System : Oil Pan Heater (Cold Weather (A) Spec.) (Except Japan)
| 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 : D20s-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) | 3 |
Komatsu : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-6(S/N 60001-Up) : Guard : Canopy(#60001-60084)
| 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 : D20s-6(S/N 60001-Up) : Guard : Canopy(#60085-60419)
| 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 : D20s-6(S/N 60001-Up) : Guard : Canopy(#60420-)
| 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 : D20s-6(S/N 60001-Up) : Guard : Cross Bar
| 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 : D20s-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 : D20s-6(S/N 60001-Up) : Guard : Loader Frame And Floor Plate (For Lever Steering)
| 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 : D20s-6(S/N 60001-Up) : Guard : Loader Frame And Floor Plate (For Pedal Steering)
| 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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-6(S/N 60001-Up) : Guard : Radiator Guard And Hood
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 7 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 8 |
Komatsu : D20s-6(S/N 60001-Up) : Guard : Radiator Guard And Hood (With Engine Side Cover)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 7 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 8 |
Komatsu : D20s-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 : D20s-6(S/N 60001-Up) : Guard : Rear Cover And Hydraulic Tank(#60001-60257)
| 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 : D20s-6(S/N 60001-Up) : Guard : Rear Cover And Hydraulic Tank(#60258-)
| 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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-6(S/N 60001-Up) : Guard : Under Guard (With 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 : D20s-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 : D20s-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 : D20s-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 : D20s-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Final Drive Case
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
| 01***30 | Bolt,(With Body Positioner) | 16 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 8 |
Komatsu : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-6(S/N 60001-Up) : Main Clutch?Transmission? Steering And Final Drive : Steering Case And Main Frame
| 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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-6(S/N 60001-Up) : Mark Plate? Tool And Kit : Accessory Parts (Except Japan)
| 11***11 | Seat,Chassis | 1 |
Komatsu : D20s-6(S/N 60001-Up) : 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 : D20s-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 : D20s-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 : D20s-6(S/N 60001-Up) : Mark Plate? Tool And Kit : Tool (Except Japan)
Komatsu : D20s-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 : D20s-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 : D20s-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 : D20s-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 : D20s-6(S/N 60001-Up) : Track : Recoil Spring(#60001-60164)
| 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 : D20s-6(S/N 60001-Up) : Track : Recoil Spring(#60165-)
| 01***30 | Bolt,(For Mechanical Governor) | 4 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 8 |
| 01***35 | Bolt, Hydraulic Tank Mounting | 12 |
Komatsu : D20s-6(S/N 60001-Up) : Track : Track Frame (With Mono Block Type Track Roller Guard)
| 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 : D20s-6(S/N 60001-Up) : Track : Track Frame (With Separate Type 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 : D20s-6(S/N 60001-Up) : Track : Track Frame (With Separate Type Track Roller Guard)
| 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 : D20s-6(S/N 60001-Up) : Track : Track Roller
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 12 |
| 01***45 | Bolt, Mount Center Hinge Retainer (Upper) | 40 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 12 |
Komatsu : D20s-6(S/N 60001-Up) : Track : Track Shoe (Lubricate Type) (Semi-Double Grouser)
| 01***18 | Nut? Shoe (Kit) | 338 |
| 07***22 | Plug,Large | 74 |
| 07***21 | Plug,(Small) | 74 |
Komatsu : D20s-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 : D20s-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 : D20s-6(S/N 60001-Up) : Track : Track Shoe (Master Pin Type) (Semi-Double Grouser)
| 01***18 | Nut? Shoe (Kit) | 346 |
| 10***20 | Link,Track? L.H | 74 |
| 10***21 | Link,Track? L.H | 74 |
Komatsu : D20s-6(S/N 60001-Up) : Track : Track Shoe (Master Pin Type) (Snow Type)
| 01***18 | Nut? Shoe (Kit) | 346 |
| 10***20 | Link,Track? L.H | 74 |
| 10***21 | Link,Track? L.H | 74 |
Komatsu : D20s-6(S/N 60001-Up) : Track : Track Shoe (Master Pin Type) (Triple Grouser With Hole)
| 01***18 | Nut? Shoe (Kit) | 346 |
| 10***20 | Link,Track? L.H | 74 |
| 10***21 | Link,Track? L.H | 74 |
Work Equipment
Komatsu : D20s-6(S/N 60001-Up) : Work Equipment : Angle Blade
| 01***45 | Washer | 2 |
| 02***40 | Bolt,(Pl) | 20 |
| 02***13 | Nut,(Pl) | 20 |
Komatsu : D20s-6(S/N 60001-Up) : Work Equipment : Bucket
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***00 | Bolt, Mount Back-Up Alarm | 2 |
| 01***11 | Nut,(Not Shown) | 2 |
Komatsu : D20s-6(S/N 60001-Up) : Work Equipment : Bucket Lock
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 4 |
| 01***13 | Nut,(For Adjustable Rod) | 4 |
Komatsu : D20s-6(S/N 60001-Up) : Work Equipment : Counter Weight (For Dumping Fork)
| 01***15 | Nut (Op) | 6 |
| 01***45 | Washer,(Without R.O.P.S.) | 6 |
| 10***20 | Stud | 6 |
Komatsu : D20s-6(S/N 60001-Up) : Work Equipment : Dumping Fork
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***00 | Bolt, Mount Back-Up Alarm | 2 |
| 01***11 | Nut,(Not Shown) | 2 |
Komatsu : D20s-6(S/N 60001-Up) : Work Equipment : Extension Fork
| 10***20 | Fork,Extension | 2 |
| 30***20 | Pin,Lock | 2 |
Komatsu : D20s-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 : D20s-6(S/N 60001-Up) : Work Equipment : Lift Arm
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 12 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 16 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 28 |
Komatsu : D20s-6(S/N 60001-Up) : Work Equipment : Lift Arm And C-Frame (For Angle Blade)
| 01***30 | Bolt,(For France Noise Suppression) | 2 |
| 01***45 | Bolt, Mount Center Hinge Retainer (Lower) | 12 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : D20s-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 |
Work Equipment Control System
Komatsu : D20s-6(S/N 60001-Up) : Work Equipment Control System : Dump Cylinder
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
Komatsu : D20s-6(S/N 60001-Up) : Work Equipment Control System : Hydraulic Piping (Dump Cylinder Line)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : D20s-6(S/N 60001-Up) : Work Equipment Control System : Hydraulic Piping (Lift Cylinder Line)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : D20s-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 : D20s-6(S/N 60001-Up) : 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***30 | Bolt? Wing,Inspection Cover | 1 |
Komatsu : D20s-6(S/N 60001-Up) : Work Equipment Control System : Lift Cylinder
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 1 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 1 |
| 07***80 | O-Ring,Hydraulic Oil Filter | 1 |
Komatsu : D20s-6(S/N 60001-Up) : Work Equipment Control System : Work Equipment Control Lever (For Bucket)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 8 |
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
Komatsu : D20s-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 : D20s-6(S/N 60001-Up) : Work Equipment Control System : Work Equipment Valve (1/2)
| 01***16 | Bolt (Op) | 4 |
| 01***25 | Bolt, Seal Cover Mounting | 2 |
| 01***30 | Bolt | 2 |
Komatsu : D20s-6(S/N 60001-Up) : Work Equipment Control System : Work Equipment Valve (1/3) (For Front Attachment And Rear Auxiliary)
| 01***16 | Bolt (Op) | 4 |
| 01***25 | Bolt, Seal Cover Mounting | 2 |
| 01***30 | Bolt | 2 |
Komatsu : D20s-6(S/N 60001-Up) : Work Equipment Control System : Work Equipment Valve (2/2)
| 01***08 | Nut (Op) | 1 |
| 07***11 | O-Ring (Kit) | 1 |
| 07***14 | O-Ring,(F4350-61a0a-20 ) | 3 |
Komatsu : D20s-6(S/N 60001-Up) : Work Equipment Control System : Work Equipment Valve (2/3) (For Front Attachment And Rear Auxiliary)
| 01***16 | Bolt (Op) | 4 |
| 01***25 | Bolt, Seal Cover Mounting | 2 |
| 01***30 | Bolt | 2 |
Komatsu : D20s-6(S/N 60001-Up) : Work Equipment Control System : Work Equipment Valve (3/3) (For Front Attachment And Rear Auxiliary)
| 01***08 | Nut (Op) | 1 |
| 07***11 | O-Ring (Kit) | 1 |
| 07***14 | O-Ring,(F4350-61a0a-20 ) | 4 |
D20S-6(S/N 60001-UP) serial number reference
The PIN/serial plate is riveted to the front frame casting, typically on the operator's left side near the radiator support. For this model, the serial number follows the model designation (e.g., D20S-6 #60001).
| Prefix | Identifies | Notes |
|---|---|---|
| D | D20S-6 (S/N 60001-UP) | Crawler dozer family. Suffix 'S' denotes a specific configuration within the D20 series. Generation is -6. Weight is 8,356 lb (3.79 t). Transport width is 5.28 ft (1.61 m). Transport height is 7.07 ft (2.15 m). Transport length is 11.5 ft (3.49 m). Travel speed is 4.66 mph (7.5 km/h). Track width is 11.8 in (300 mm). Engine speed at max torque is 2,450 rpm. Displacement is 0.71 US gal (2.69 L). No tilt device or rear ripper installed. Soil pressure is 0.37 kg/cm². Production years range from 1988–1995; verify exact build year via chassis plate. |
Frequently asked questions
What engine is used in the Komatsu D20S-6?
The machine is equipped with a Komatsu 4D95S-W engine, providing approximately 29.5 kW (39.6 hp) of power.
What is the operating weight of this model?
The operating weight for the D20S-6 is approximately 3.79 t (8,356 lb).
What machine replaced the D20S-6?
Specific successor models are not documented in the provided technical data; however, it belongs to a lineage of Komatsu utility dozers that evolved through subsequent dash-number generations.
What D20S-6(S/N 60001-UP) owners discuss
What engine is installed in the Komatsu D20S-6 (S/N 60001-UP)?
The machine uses a Komatsu 4D95S-W engine with a displacement of 2.69 L (0.71 US gal). The engine features a 4-stroke, water- and direct injection design. Engine speed at maximum torque is 2,450 rpm. One source identifies the specific variant as 4D95S-W-1F-S; however, the standard designation for this series is 4D95S-W.
What are the typical hydraulic performance and soil pressure characteristics for this model?
The hydraulic system provides a soil pressure of 0.37 kg/cm². The machine is designed for utility applications with a focus on stability in its compact weight class.
What are the standard undercarriage and track specifications for the D20S-6?
The machine is equipped with a 300 mm (11.8 in) track width. The transport width of the unit is 1.61 m (5.28 ft).
What are the common electrical and sensor issues to monitor on this series?
While specific fault code descriptions for the D20S-6 are not detailed in all documentation, general Komatsu system monitoring involves checking for low battery voltage, high coolant temperature, sensor failures, solenoid valve circuit errors, and abnormal pressure readings. Use a diagnostic tool connected to the ECU to scan electronic systems and monitor live data.
What fluid types are recommended for maintaining the D20S-6?
Maintenance should utilize Komatsu genuine lubricants to meet engineering standards. This includes specific diesel engine oil, hydraulic oil (HYDO), axle oil, powertrain oil, and super coolant. Always verify exact fluid grades against the machine's operation and maintenance manual.
What is the most critical item to check when purchasing a used D20S-6 (S/N 60001-UP)?
Verify that the serial number on the factory plate (located on the front frame casting near the radiator support) matches the number stamped into the chassis frame. A mismatch between the riveted plate and the engraved frame is a primary signal of stolen equipment or unauthorized repairs.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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