Komatsubulldozersmall ( - d39)
Komatsu D21S-6(S/N 60001-UP (Overseas Version(HYDOROSHIFT Transmission)))
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu D21S-6 (S/N 60001-UP, Overseas Version) is a compact crawler bulldozer designed for utility earthmoving and light construction tasks. This specific configuration features a Hydroroshift transmission and is powered by the Komatsu 4D95S-W diesel engine, delivering approximately 39.6 hp (29.5 kW). Operating within a weight class of roughly 3,840 kg (8,466 lb), the machine is characterized by its narrow transport width of 300 mm (11.8 in) track width and a compact footprint suitable for access-limited jobsites.
As part of the D21 series lineage, the -6 generation represents a mid-period evolution in Komatsu's small dozer development. While later generations introduced more advanced telematics, the D21S-6 remains highly relevant in the used parts and machinery market due to its mechanical simplicity and robust 4D95 engine architecture. Its reliance on established hydraulic and transmission components makes it a cost-effective choice for fleet owners seeking reliable, easy-to-service utility equipment.
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 D21S-6(S/N 60001-UP (Overseas Version(HYDOROSHIFT Transmission))) specifications
Engine
| Engine Model | Komatsu 4D9/95S-W |
| Net Power | 39.6 hp (29.5 kW) to 44 hp |
| Engine Speed at Max Torque | 2,450 rpm |
| Displacement | 2.69 L (0.71 US gal) |
Weights
| Operating Weight | 3,840 kg (8,466 lb) |
Dimensions
| Transport Length | 3.49 m (11.5 ft) |
| Transport Width | 1.61 m (5.28 ft) |
| Transport Height | 2.15 m (7.07 ft) |
| Track Width | 300 mm (11.8 in) |
Performance
| Travel Speed | 4.4 km/h (2.73 mph) |
| Soil Pressure | 0.38 kg/cm² |
Features & Equipment
| Air Conditioning | No |
| Diesel Particulate Filter | No |
| Rear Ripper | No |
| Tilt Device | No |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
D21S-6(S/N 60001-UP (Overseas Version(HYDOROSHIFT Transmission))) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine Crankcase (w/ filter) | 7.31 L | Verify with OMM for viscosity-by-climate notes. |
| Cooling System | 36.9 L | Verify with OMM for viscosity-by-climate notes. |
| Fuel Tank | Not documented for this exact serial range — verify with your dealer | Refer to the operation and maintenance manual. |
| Transmission/Powertrain (Hydrorift Transmission) | 2.82 L | Refer to the operation and maintenance manual. |
| Final Drives (each) | 2.88 L | Refer to the operation and maintenance manual. |
| Hydraulic System/Tank | 2.82 L | Refer to the operation and maintenance manual. |
| Grease | Not documented for this exact serial range — verify with your dealer | Refer to the operation and maintenance manual. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu D21S-6(S/N 60001-UP (Overseas Version(HYDOROSHIFT Transmission))) 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 D21S-6(S/N 60001-UP (Overseas Version(HYDOROSHIFT Transmission))) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize oil wear analysis during 500 and 1000-hour intervals to monitor engine and hydraulic oil health. Regularly sample hydraulic fluid to detect particulate contamination before pump failure occurs. Monitor coolant for SCA depletion to prevent liner pitting.
Corrective & Common Repairs
Watch for steering clutch issues; older units may experience clutches rusting together or failing to engage. If the engine stalls upon lever movement, inspect the hydraulic system for air ingress or blown cylinder gaskets. Monitor the undercarriage for track slipping, which often indicates hydraulic slave cylinder problems or excessive wear in the final drive components.
Overhaul & Rebuild Points
Plan major overhauls around the 2000-hour mark, focusing on a full transmission service and hydraulic oil replacement. Inspect the turbocharger for shaft play and evaluate valve train wear during 1000-hour intervals. When rebuilding the powertrain, verify all structural components and engine mounts.
Seasonal & Environment Servicing
In cold weather operations, implement specific warm-up procedures and check battery strength. During high-dust environments, increase air filter inspection frequency to prevent engine choking. For summer use, monitor the cooling system closely to prevent overheating.
D21S-6(S/N 60001-UP (Overseas Version(HYDOROSHIFT Transmission))) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 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 → |
| 6204-61-5190 | Gasket,Oil Cooler Element | Lubrication 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.
D21S-6(S/N 60001-UP (Overseas Version(HYDOROSHIFT Transmission))) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| E10 | Engine controller power malfunction | Faulty ECM power connections, blown fuses, or loose ground wires | Inspect ECM power connections, fuses, and ground wires |
| E11 | Engine protection—output power reduced | High coolant temperature, low oil pressure, or restricted 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 |
| CA451 / CA452 | Common rail pressure error | Malfunction in the fuel rail pressure sensor or issues within pump lines | Diagnose the fuel rail pressure sensor or inspect pump lines |
| DW43KA / DW43KB | Travel speed solenoid open/short circuit | Electrical short or open circuit in the travel speed control solenoid | Replace the solenoid valve |
| DXA8KA / DXA8KB | Front pump EPC solenoid valve circuit fault | Wire chafing or electrical short in the solenoid circuit | Inspect wiring harness for chafing or shorts |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
D21S-6(S/N 60001-UP (Overseas Version(HYDOROSHIFT Transmission))) attachments & work tools
Blades
Straight Semi-U Blade configuration is available for efficient material handling. Specific widths and capacities are not documented for this exact serial range — verify with your dealer.
Rippers
Ripper attachments are available for this model. Specific shank counts and weights are not specified in the technical documentation.
Drawbars/counterweights
Specific drawbar or counterweight configurations for this serial range are not listed in the factory specifications.
Hydraulic arrangement notes
The machine utilizes a hydrostatic transmission. Specific hydraulic arrangements for front or rear tool attachments are not detailed in the source text.
All D21S-6(S/N 60001-UP (Overseas Version(HYDOROSHIFT Transmission))) assemblies by section
Every catalogued assembly group for the Komatsu D21S-6(S/N 60001-UP (Overseas Version(HYDOROSHIFT Transmission))). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
4d95s-W-1g-As S/N 23318-Up
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As S/N 23318-Up : Alternator (15a)
| 60***60 | Alternator A. (15a) | 1 |
| KD***70 | Cover | 1 |
| KD***30 | Retainer | 2 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As S/N 23318-Up : Alternator And Mounting (15a)
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
| 01***45 | Bolt | 1 |
| 01***06 | Nut | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As S/N 23318-Up : Camshaft And Tappet
| 01***20 | Screw | 2 |
| 04***16 | Fitting Wedge | 1 |
| 62***31 | Thrust Washer | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As S/N 23318-Up : Crankshaft
| 61***20 | Bolt | 1 |
| 62***00 | Crankshaft Ass'Y | 1 |
| 62***00 | Main Metal Ass'Y | 5 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As S/N 23318-Up : Cylinder Block
| 01***55 | Bolt, Mount Tube To Switch Pump | 8 |
| 01***16 | Screw | 1 |
| 01***20 | Screw | 2 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As S/N 23318-Up : Cylinder Head Cover
| 61***10 | Cap, Oil Filler | 1 |
| 61***20 | Screw | 3 |
| 61***30 | Washer,(B) | 3 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As S/N 23318-Up : Flywheel And Flywheel Housing
| 01***30 | Bolt | 6 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 11 |
| 01***45 | Bolt, Bracket Mounting | 8 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As S/N 23318-Up : Front Cover And Gear
| 01***10 | Bolt | 1 |
| 01***70 | Bolt,(For 75a Alternator) | 1 |
| 01***16 | Bolt | 2 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As S/N 23318-Up : Fuel Injection Pump And Piping
| 01***35 | Stud | 4 |
| 01***12 | Bolt | 2 |
| 01***25 | Screw | 2 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As S/N 23318-Up : Fuel Nozzle And Spill Pipe
| 07***50 | Tube,Spill | 1 |
| 07***55 | Tube,Spill | 1 |
| 07***85 | Clip | 2 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As S/N 23318-Up : Gasket Kit (Cold Terrain Spec.)(#24252-)
| 01***12 | Washer,Lock (Noise Suppression Spec.) (K2) | 1 |
| 07***18 | O-Ring,(See Fig.1601-29?1602-17) | 1 |
| 07***20 | O-Ring,Relief Valve | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As S/N 23318-Up : Gasket Kit(#24252-)
| 01***12 | Washer,Lock (Noise Suppression Spec.) (K2) | 1 |
| 07***18 | O-Ring,(See Fig.1601-29?1602-17) | 1 |
| 07***20 | O-Ring,Relief Valve | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As S/N 23318-Up : Oil Pan (Cold Terrain Spec.)(#24252-)
| 01***14 | Bolt | 24 |
| 07***12 | Washer, Gasket,(Without Thermo Sensor) (K1) | 1 |
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As S/N 23318-Up : Water Pump And Cooling Fan(#24252-)
| 01***16 | Screw | 5 |
| 01***25 | Bolt - Relay Mounting | 2 |
| 01***20 | Screw | 2 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 4d95s-W-1g-As 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Control System : Brake Pedal (For Lever Steering) (With Decelerator Pedal)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Control System : Brake Pedal Linkage
| 01***32 | Screw | 1 |
| 01***06 | Nut? L.H. Thread,L.H. Thread (For Chinese) | 2 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Control System : Decelerator Pedal
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***45 | Screw | 1 |
| 01***16 | Screw | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Control System : Fuel Control Lever (For F3-R3 Transmission)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***04 | Nut,(For Air Conditioner Less) | 1 |
| 01***13 | Washer,Spring(For Wiper Switch Earth) | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Control System : Fuel Control Lever (With Decelerator Pedal)
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Control System : Inching Pedal (For Lever Steering)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 2 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Control System : Inching Pedal (For Pedal Steering) (With Decelerator Pedal)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***06 | Nut? L.H. Thread,L.H. Thread (For Chinese) | 1 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Control System : Inching Pedal (For Pedal Steering) (Without Decelerator Pedal)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***06 | Nut? L.H. Thread,L.H. Thread (For Chinese) | 1 |
| 01***06 | Nut,L.H. Thread (For Russian) | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Control System : Inching Pedal Linkage (For Lever Steering)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***05 | Nut,L.H. Thread (D31s) | 1 |
| 01***06 | Nut? L.H. Thread,L.H. Thread (For Chinese) | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Control System : Inching Pedal Linkage (For Pedal Steering)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***05 | Nut,L.H. Thread (D31s) | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Control System : Oil Cooler Piping (For F3-R3 Transmission)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Control System : Steering And Brake Pedal (For Pedal Steering) (With Decelerator Pedal)
| 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Control System : Steering And Brake Pedal (For Pedal Steering) (Without Decelerator Pedal)
| 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Control System : Steering Piping
| 01***20 | Bolt,(With Auto Emergency Steering) | 1 |
| 01***50 | Bolt (Kit) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Control System : Transmission Control Lever (For F3-R3 Transmission)
| 01***30 | Bolt,(For Mechanical Governor) | 3 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***05 | Nut,L.H. Thread (D31s) | 3 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Control System : Transmission Control Linkage (For F3-R3 Transmission)
| 01***30 | Bolt,(For Mechanical Governor) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
Engine Related Parts And Electrical System
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Engine Related Parts And Electrical System : Back-Up Alarm
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***35 | Screw | 2 |
| 01***20 | Screw | 4 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Engine Related Parts And Electrical System : Electrical System (For 15a Alternator)
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 10 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Engine Related Parts And Electrical System : Electrical System (For 25a Alternator)
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 10 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Engine Related Parts And Electrical System : Electrical System (With Rops Cab)
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 9 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Engine Related Parts And Electrical System : Engine Mounting Parts
| 01***10 | Bolt (Op) | 4 |
| 10***20 | Cushion | 4 |
| 10***30 | Cushion | 4 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Engine Related Parts And Electrical System : Fuel Tank And Piping (With Decelerator Pedal)
| 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Engine Related Parts And Electrical System : Instrument Panel (For Lever 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 |
Guard
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Guard : Loader Frame And Floor Plate (For Lever Steering) (With Decelerator Pedal)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 17 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***55 | Bolt,(For Reinforced Type) | 12 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Guard : Loader Frame And Floor Plate (For Lever Steering) (Without Decelerator Pedal)
| 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Guard : Loader Frame And Floor Plate (For Pedal Steering) (With Decelerator Pedal)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 17 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***35 | Bolt,R.H. Outside And L.H. Inside | 2 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Guard : Loader Frame And Floor Plate (For Pedal Steering) (Without Decelerator Pedal)
| 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Guard : Rear Cover And Hydraulic Tank(#60001-60226)
| 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Guard : Rear Cover And Hydraulic Tank(#60227-)
| 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Guard : Rops Canopy
| 01***80 | Washer,(For R.H. Steering) | 4 |
| 10***10 | Guard,Rops Canopy | 1 |
| 10***10 | Pad,Rear | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Guard : Under Guard
| 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Guard : Under Guard (Reinforced Type)
| 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Main Clutch?Transmission? Steering And Final Drive : Bevel Gear And Shaft
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 6 |
| 01***30 | Bolt | 10 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 6 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Main Clutch?Transmission? Steering And Final Drive : Damper
| 01***16 | Bolt (With Air Heater & Conditioner) | 6 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 10 |
| 01***75 | Bolt,(For Adjusting) | 3 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Main Clutch?Transmission? Steering And Final Drive : Steering Case And Main Frame (For Semi-Long Lift Arm)
| 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Main Clutch?Transmission? Steering And Final Drive : Steering Clutch (For F3-R3 Transmission)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 16 |
| 01***10 | Nut (K10) | 2 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 16 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Main Clutch?Transmission? Steering And Final Drive : Transmission (F3-R3) (1/7) (Case)
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***35 | Bolt,(For Position Fixing) | 1 |
| 01***45 | Screw | 2 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Main Clutch?Transmission? Steering And Final Drive : Transmission (F3-R3) (2/7) (Reverse Housing)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***12 | Washer,(F2320-63a2 -13 ) | 1 |
| 04***00 | Key | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Main Clutch?Transmission? Steering And Final Drive : Transmission (F3-R3) (3/7) (Forward And 3rd Housing)
| 04***24 | Pin,Dowel (For No.3 Housing) | 2 |
| 10***20 | Gear | 1 |
| 10***20 | Gear | 6 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Main Clutch?Transmission? Steering And Final Drive : Transmission (F3-R3) (4/7) (2nd Housing)(#60001-60333)
| 04***15 | Ring,Back-Up | 1 |
| 04***20 | Ring, Snap | 1 |
| 06***07 | Bearing,Ball | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Main Clutch?Transmission? Steering And Final Drive : Transmission (F3-R3) (4/7) (2nd Housing)(#60334-)
| 01***08 | Screw | 1 |
| 04***15 | Ring,Back-Up | 1 |
| 04***20 | Ring, Snap | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Main Clutch?Transmission? Steering And Final Drive : Transmission (F3-R3) (5/7) (1st Housing)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Main Clutch?Transmission? Steering And Final Drive : Transmission (F3-R3) (6/7) (Transfer)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***75 | Bolt, Tube Mounting | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Main Clutch?Transmission? Steering And Final Drive : Transmission (F3-R3) (7/7) (Pump)
| 01***45 | Screw | 3 |
| 01***55 | Bolt,(10m) | 7 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Main Clutch?Transmission? Steering And Final Drive : Transmission (F3-R3) (Modulation)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***60 | Bolt,(For Japan And Sweden) | 3 |
| 01***70 | Bolt (Op) | 5 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Main Clutch?Transmission? Steering And Final Drive : Transmission (F3-R3) (Selector And Inching)
| 01***25 | Bolt,Without Revolution Sensor | 2 |
| 01***50 | Bolt (Kit) | 5 |
| 01***65 | Bolt,R.H | 3 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Main Clutch?Transmission? Steering And Final Drive : Universal Joint (For F3-R3 Transmission)
| 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Mark Plate? Tool And Kit : Accessory Parts (Except Japan)
| 11***11 | Seat,Chassis | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Mark Plate? Tool And Kit : Spare Parts (Except Japan)
| 07***95 | O-Ring,Transmission Strainer | 1 |
| 07***28 | O-Ring,(For Hd325-6?Hm400-1) (A2110) | 2 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 4 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Track : Recoil Spring(#60001-60171)
| 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Track : Recoil Spring(#60172-)
| 01***30 | Bolt,(For Mechanical Governor) | 4 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 8 |
| 01***35 | Bolt, Hydraulic Tank Mounting | 12 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Track : Track Frame
| 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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) | 40 |
| 01***35 | Bolt,R.H. Outside And L.H. Inside | 16 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Track : Track Shoe (Lubricate Type) (Triple Grouser With Hole)
| 01***18 | Nut? Shoe (Kit) | 362 |
| 07***22 | Plug,Large | 78 |
| 07***21 | Plug,(Small) | 78 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Track : Track Shoe (Master Pin Type) (Triple Grouser With Hole)
| 01***18 | Nut? Shoe (Kit) | 362 |
| 10***20 | Link,Track? L.H | 78 |
| 10***21 | Link,Track? L.H | 78 |
Work Equipment
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Work Equipment : Bucket
| 01***75 | Bolt,(For Adjusting) | 2 |
| 01***00 | Bolt, Mount Back-Up Alarm | 2 |
| 01***11 | Nut,(Not Shown) | 4 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Work Equipment : Bucket (For Semi-Long Lift Arm) (For Ke And Tbg Spec.)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***00 | Bolt, Mount Back-Up Alarm | 2 |
| 01***11 | Nut,(Not Shown) | 2 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Work Equipment : Counter Weight And Hitch
| 01***15 | Nut (Op) | 6 |
| 01***45 | Washer,(Without R.O.P.S.) | 6 |
| 10***12 | Drawbar | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Work Equipment : Hydraulic Piping (Multi Purpose Bucket Cylinder Line)(#40001-)
| 01***20 | Bolt,(With Auto Emergency Steering) | 3 |
| 01***25 | Bolt,Without Revolution Sensor | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Work Equipment : Lift Arm (Semi-Long Type)
| 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 |
Work Equipment Control System
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Work Equipment Control System : Hydraulic Piping (Tank To Pump To Valve) (For 25a Alternator)
| 01***45 | Screw | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Work Equipment Control System : Hydraulic Tank And Filter
| 01***25 | Bolt,Without Revolution Sensor | 7 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 7 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Work Equipment Control System : Work Equipment Control Lever (1/2) (For Multi Purpose 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Work Equipment Control System : Work Equipment Control Lever (2/2) (For Multi Purpose Bucket)
| 01***05 | Nut,L.H. (For Trimming Dozer) | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
| 04***24 | Pin, Spring | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : Work Equipment Control System : Work Equipment Pump
| 04***15 | Ring, Snap | 1 |
| 70***10 | Seal, Oil | 1 |
| 70***70 | Plate | 1 |
Komatsu : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 : D21s-6(S/N 60001-Up (Overseas Version(Hydoroshift Transmission))) : 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 |
D21S-6(S/N 60001-UP (Overseas Version(HYDOROSHIFT Transmission))) serial number reference
The PIN plate is located on the front frame casting, typically on the operator's left side near the radiator support. To read the prefix, locate the first three characters of the serial number sequence on the machine plate or chassis engraving. Cross-check the riveted plate against the engraved frame number to ensure they match.
| Prefix | Identifies | Notes |
|---|---|---|
| DNH | Overseas Version (HYDOROSHIFT Transmission) | Identifies the D21S-6 configuration with Hydroshift transmission for export/overseas markets. Serial range 60001-UP. Verify specific market designation on the machine plate. |
Frequently asked questions
What engine is used in the Komatsu D21S-6 (S/N 60001-UP)?
The machine is powered by the Komatsu 4D95S-W diesel engine.
What is the operating weight of this bulldozer?
The operating weight is approximately 3,840 kg (8,466 lb).
What model replaced the D21S-6?
Specific successor models vary by region; however, the D21 series evolved through subsequent dash-number generations such as the -7 and -8.
What D21S-6(S/N 60001-UP (Overseas Version(HYDOROSHIFT Transmission))) owners discuss
What are the most frequent steering issues reported for the D21S-6?
Operators frequently report steering failure where the machine only travels in a straight line or exhibits weak steering on one side. A common cause is the dry-type steering clutches rusting together, which can also make clutch removal from the housing extremely difficult. In some cases, even after replacing drums, steels, and frictions, the clutches may fail to disengage properly.
What hydraulic symptoms should be investigated if the tracks are slipping?
If the machine experiences track slipping, technicians often investigate potential hydraulic issues within the slave cylinder. Additionally, a blade that only turns in one direction may indicate related hydraulic system air or component failure.
How does steering operating pressure vary for this machine series?
Steering operating pressures vary by specific model configuration: models such as the A, P, S, Q-6 and P-6A are specified at 27 kg/cm² (384 psi), while the E-6, P-6B, and S-6A variants are specified at 20 kg/cm² (284 psi).
What engine is used in the Komatsu D21S-6 (S/N 60001-UP)?
The D21S-6 (S/N 60001-UP) utilizes a Komatsu 4D95S-W engine. Depending on the specific production sub-series, power output is documented between 3HD 39.6 hp (29.5 kW) and 44 hp.
What maintenance tasks are required at the 500-hour service interval?
The 500-hour preventative maintenance interval includes all 250-hour tasks plus: fuel filter replacement, hydraulic return filter replacement, battery service, coolant test (SCA), oil sample collection, and a detailed undercarriage inspection.
What should be checked when buying a used D21S-6 to ensure the hours are legitimate?
Verify the dashboard hour meter against available telematics history. On machines built since 2008, any discrepancy of more than approximately 50 hours between telematics records and the dashboard reading is a significant signal for potential hour-meter rollback. Additionally, cross-check the riveted serial plate on the chassis against the number stamped into the frame casting; a mismatch is a primary indicator of stolen equipment.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Serial-range & configuration variants
This page covers the Komatsu D21S-6(S/N 60001-UP (Overseas Version(HYDOROSHIFT Transmission))). Related factory variants of the same model family:
D21S-6(S/N 60001-UP (Domestic Version(HYDOROSHIFT Transmission)))
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