Komatsumotor grader(no series)
Komatsu GD621R-1(S/N 10001-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu GD621R-1 is a mid-size motor grader in the GD600 series, powered by the S6D105-1 six-cylinder diesel engine producing 155.6 hp (116 kW) at 2500 rpm. It has an operating weight of approximately 27,999 lb (12,700 kg) and a moldboard width of 12.2 ft (3.7 m). Production years for this specific serial range (S/N 10001-UP) generally fall within the late 1990s to early 2000s. It succeeded the GD621A-1 and was eventually replaced by the GD623A-1 and GD623R-1 models. Configurations offered include standard and wide variations, with options for rear-mounted rippers and scarifiers.
Across the GD600 series generations, changes focused on emissions compliance, hydraulic efficiency, and operator comfort. The GD621R-1 represents a transitional model between the older A-series and the newer R-series, featuring updated hydroshift transmission controls and improved undercarriage durability. It remains significant in the used and parts market due to its robust S6D105 engine, which shares components with other Komatsu models, ensuring parts availability. The machine's mid-size weight makes it versatile for road maintenance and grading, while its mechanical simplicity aids in aftermarket support.
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 GD621R-1(S/N 10001-UP) specifications
Engine
| Model | S6D105 |
| Number of Cylinders | 6 |
| Displacement | 396.1 cu in (6,491 cu cm) |
| Max Power | 155.6 hp (116 kw) @ 2500 rpm |
| Net Power (Gear 5-6) | 155.6 hp (116 kw) |
Weights
| Std Operation Weight - Total | 27,998.8 lb (12,700 kg) |
Dimensions
| Overall Length | 27.5 ft (8 m) |
| Width Over Tires | 6.56 ft (2 m) |
| Wheelbase | 19.69 ft (6 m) |
| Rear Ground Clearance | 0 ft (0 m) |
| Front Axle Ground Clearance | 0 ft (0 m) |
| Height to Top of Isomount Cab | 13.12 ft (4 m) |
| Tandem Axle Wheelbase | 6.56 ft (2 m) |
| Blade Base | 9.84 ft (3 m) |
| Moldboard Width | 13.1 ft (4 m) |
| Moldboard Height | 25.4 in (65 cm) |
Performance
| Max Speed - Forward | 27.8 mph (45 kph) |
| Max Speed - Reverse | 33.9 mph (55 kph) |
| Turning Radius | 34.2 ft (10 m) |
| Number of Gears - Forward | 6 |
Service capacities (summary)
| Fuel Capacity | 75.3 gal (285 l) |
| Tire Size | 13.00-24-10PR |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
Komatsu GD621R-1(S/N 10001-UP) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
Servicing the GD621R-1(S/N 10001-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize Komatsu KOWA fluid analysis at every 500-hour interval to monitor engine wear metals and hydraulic contamination. Check the hydraulic oil sample at 1000 hours for particle count and viscosity. Monitor the coolant SCA concentration at 500 hours to prevent scaling and corrosion in the S6D105-1 engine cooling system. Track fuel filter restriction to predict injector wear. Use KOMTRAX telematics data to identify load spikes that accelerate fluid degradation. Inspect the air filter restriction indicator daily to ensure clean intake air, protecting the turbocharger and engine internals.
Corrective & Common Repairs
Address frequent hydraulic leaks at the circle rotation motor seals and blade lift cylinder rods. Replace worn front axle kingpins and bushings to correct steering play and tire wear. Inspect the hydroshift transmission control valve for sticking, which causes harsh gear shifts. Check the differential lock actuation for proper engagement. Replace worn cutting edge and end bits to maintain grading efficiency. Inspect the wet disc brakes for wear and adjust the parking brake mechanism. Check the turbocharger shaft play and inspect the intercooler for debris blockage.
Overhaul & Rebuild Points
Plan for major powertrain overhaul around 10,000-12,000 hours, focusing on the S6D105-1 engine piston rings and valve seats. Rebuild the hydroshift transmission and torque converter at similar intervals, checking the clutch packs and pump wear. Inspect the final drive planetary gears and bearings for pitting or spalling. Check the tandem drive assembly for gear backlash and bearing wear. Evaluate the circle rotation gear teeth for pitting and the slew bearing for looseness. Inspect the frame for cracks near the pivot points and blade mounting brackets.
Seasonal & Environment Servicing
In cold weather, use low-viscosity engine oil and ensure the coolant mixture provides adequate freeze protection. Preheat the engine and hydraulic system before operation. In dusty environments, service the air filter more frequently and check the pre-cleaner. In high-humidity areas, monitor the coolant for water contamination and check the battery electrolyte levels. Protect the hydraulic hoses from UV degradation with covers or storage. Inspect the radiator and oil cooler fins for insect and debris buildup, cleaning them to maintain cooling efficiency. Check the tire pressure regularly as temperature changes affect inflation.
GD621R-1(S/N 10001-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 07281-00197 | Clamp,(With Pre-Fuel Filter) | Fuel system service | Check fitment → |
| 09019-08035 | Wrench,Filter (For Add. Fuel Filter) | Fuel system service | Check fitment → |
| 600-311-9121 | Cartridge,Fuel Filter | Fuel system service | Check fitment → |
| 232-843-1430 | Filter Ass'Y,Air | Air intake service | Check fitment → |
| 09637-30262 | Plate? Instruction,Air Cleaner (Double Element) | Air intake service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
GD621R-1(S/N 10001-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CA115 | Engine speed sensor and backup speed sensor failure | Faulty crankshaft speed sensor, damaged wiring harness, or corroded connector at the sensor pin | Inspect the sensor wiring and connector for corrosion or damage; replace the speed sensor if voltage is absent at the pin |
| CA111 | Engine controller internal fault | Internal failure of the Electronic Control Module (ECM) | Replace or reprogram the ECM |
| AA10NX | Air cleaner clogging | Restricted or dirty air filter element | Replace the air filter element |
| CA441 | Battery voltage too low | Weak battery, loose connections, or failing alternator | Check battery health and terminal connections; replace the alternator or battery as needed |
| B@BCNS | Engine coolant overheating | Low coolant level, blocked radiator fins, or failed fan belt | Check radiator fins, fan belt, and coolant level; fill coolant and inspect for leaks |
| CA122 | Intake air pressure sensor feedback voltage too high | Malfunction in the intake pressure sensor or wiring short | Verify the intake pressure sensor operation and inspect wiring integrity |
| CA451 | Common rail pressure sensor feedback value too high | Faulty rail pressure sensor or actual overpressure condition in the fuel system | Diagnose the fuel rail pressure sensor or check pump lines for blockage |
| CA234 | Engine overspeed | Incorrect throttle calibration, excessive engine load cycle, or operator misuse | Verify throttle calibration and review engine load cycles |
| AB00KE | Charging voltage too low | Alternator failure or loose drive belt | Replace the alternator or tighten the belt |
| CA153 | Intake air temperature sensor feedback voltage too high | Faulty Intake Air Temperature (IAT) sensor | Replace or test the IAT sensor |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
GD621R-1(S/N 10001-UP) attachments & work tools
Standard Blade
The GD621R-1 is equipped with a 12.2 ft (3.7 m) wide moldboard with a height of 25.4 in (645 mm). The blade base measures 8.54 ft (2.6 m). This configuration is standard for the 155.6 hp class and is mounted via the machine's circle rotation system.
Ripper
A rear-mounted ripper is available as an optional work tool. The shop manual for the GD621R-1 series includes specific sections for the disassembly, assembly, and maintenance of the rear mounting ripper cylinder and structure.
Scarifier
A front-mounted scarifier is listed as an optional attachment in the factory documentation. The manual indicates that the scarifier structure and hydraulic cylinders are covered in the work equipment section, requiring specific hydraulic circuit integration.
Hydraulic System
The machine utilizes a hydraulic gear pump (part number 23B-60-11100) to supply pressure for the blade lift, side shift, and circle rotation functions. The system includes a blade accumulator for smooth operation and requires Komatsu hydraulic oil or equivalent specifications.
Engine
The GD621R-1 (S/N 10001-UP) uses the Komatsu S6D105-1 engine, a 6-cylinder, 396.1 cu in (6,491 cu cm) diesel unit. This engine delivers 155.6 hp (116 kW) at 2,500 rpm. The fuel tank capacity is 75.3 gal (285 l).
All GD621R-1(S/N 10001-UP) assemblies by section
Every catalogued assembly group for the Komatsu GD621R-1(S/N 10001-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Control System
Komatsu : Gd621r-1(S/N 10001-Up) : Control System : Accelerator Pedal(#10001-10028)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 3 |
Komatsu : Gd621r-1(S/N 10001-Up) : Control System : Accelerator Pedal(#10029-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Control System : Bank Cutting Control System
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***45 | Bolt, Mount Center Hinge Retainer (Upper) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Control System : Booster And Master Cylinder
| 04***30 | Seal, Dust | 1 |
| 23***70 | Seat | 1 |
| 23***20 | Spring | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Control System : Brake Pedal(#10001-10107)
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***08 | Nut,L.H. Thread | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Control System : Brake Pedal(#10108-)
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***08 | Nut,L.H. Thread | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Control System : Brake Piping (1/2)
| 01***12 | Bolt,(With Cylinder Cover) | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Control System : Brake Piping (2/2)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 8 |
Komatsu : Gd621r-1(S/N 10001-Up) : Control System : Console Box
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 6 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
Komatsu : Gd621r-1(S/N 10001-Up) : Control System : Fuel Control Lever(#10001-10107)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***05 | Nut,L.H. Thread (D31s) | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 3 |
Komatsu : Gd621r-1(S/N 10001-Up) : Control System : Fuel Control Lever(#10108-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***05 | Nut,L.H. Thread (D31s) | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 3 |
Komatsu : Gd621r-1(S/N 10001-Up) : Control System : Hydraulic Control Lever (For Front Blade)
| 01***05 | Nut,L.H. Thread (D31s) | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
| 01***08 | Washer,(For Fixed Type Ripper) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Control System : Hydraulic Control Lever (For Scarifier)
Komatsu : Gd621r-1(S/N 10001-Up) : Control System : Hydraulic Control Lever? L.H.
| 01***16 | Screw | 1 |
| 01***05 | Nut,L.H. Thread (D31s) | 3 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 3 |
Komatsu : Gd621r-1(S/N 10001-Up) : Control System : Hydraulic Control Lever? R.H.
| 01***16 | Screw | 1 |
| 01***05 | Nut,L.H. Thread (D31s) | 3 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 3 |
Komatsu : Gd621r-1(S/N 10001-Up) : Control System : Inching Pedal
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Control System : Parking Brake Control Lever
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 3 |
| 01***45 | Bolt, Mounting Bracket To Radiator (Top) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Control System : Steering Wheel(#10001-10028)
| 01***11 | Nut - Mounting | 1 |
| 01***26 | Washer,(For Additional Rear Lamp) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Control System : Steering Wheel(#10029-)
| 01***11 | Nut - Mounting | 1 |
| 01***07 | Washer, Spring | 1 |
| 01***26 | Washer,(For Additional Rear Lamp) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Control System : Transmission Control Lever (1/2)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 8 |
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 4 |
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Control System : Transmission Control Lever (2/2)
| 01***50 | Bolt (Kit) | 1 |
| 01***55 | Bolt, Mount Tube To Switch Pump | 2 |
| 01***06 | Nut,L.H. Thread (For Russian) | 3 |
Engine Related Parts And Electrical System
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Air Cleaner And Air Cleaner Connection (Sand And Dusty Spec.)(#10243-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 8 |
| 01***16 | Washer,Radio Controlled Slag Handling | 8 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Air Cleaner And Air Cleaner Connection(#10243-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***16 | Washer,(With Water Separator) | 4 |
| 07***29 | Clamp, Hose | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Air Cleaner Connection (Sand And Dusty Spec.)(#10003-10242)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 8 |
| 01***16 | Washer,Radio Controlled Slag Handling | 8 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Air Cleaner Connection(#10001-10002)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 8 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 12 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Air Cleaner Connection(#10003-10242)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***16 | Washer,(With Water Separator) | 4 |
| 07***29 | Clamp, Hose | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Back-Up Alarm(#.-)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***14 | Bolt,(With Canopy) | 1 |
| 01***14 | Seat,(For Automatic) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Back-Up Alarm(#10001-.)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***16 | Seat,(For Desiccant Type) (Welded) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Back-Up Lamp
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Battery
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 16 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Caution Lamp
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***32 | Washer,(With Auto Emergency Steering) | 3 |
| 08***60 | Bulb? 35w,35w | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Combination Lamp
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 1 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Electrical System (Battery Line)
| 01***14 | Bolt | 2 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 1 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Electrical System (Center)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 4 |
| 01***14 | Bolt,(With Canopy) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Electrical System (Rear)
| 01***25 | Bolt,Without Revolution Sensor | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
| 01***06 | Nut | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Engine And Transmission Mounting Parts
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***40 | Bolt,(With Service Valve R.H.) | 20 |
| 01***60 | Bolt,(For Ripper) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Front Work Lamp
| 01***30 | Bolt-Hex, Bolt,(With Center Guard) | 2 |
| 01***22 | Seat (Welded) | 2 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Fuel Piping
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 6 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Fuel Piping (With Water Separator)(#.-)
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***25 | Bolt,Without Revolution Sensor | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Fuel Tank And Hydraulic Tank(#10001-10242)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For High High Lift) | 1 |
| 01***50 | Bolt,(For Tbg/Abe Spec.) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Fuel Tank And Hydraulic Tank(#10243-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For High High Lift) | 1 |
| 01***35 | Bolt,(With Rops) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Head Lamp
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 3 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Inspection Lamp
| 01***08 | Screw | 3 |
| 23***40 | Connector | 1 |
| 23***80 | Cap | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Instrument Panel (Front)
| 01***12 | Bolt,(With Cylinder Cover) | 1 |
| 01***16 | Screw | 6 |
| 01***16 | Washer,(For 35a Alternator) | 7 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Instrument Panel (Side)
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 3 |
| 01***20 | Bolt,(Without Air Con. Or Heater) | 6 |
| 01***12 | Screw,(With Articulate Indicator) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Instrument Panel (Side) (With Air Conditioner)(#10108-)
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 3 |
| 01***20 | Bolt,(Without Air Con. Or Heater) | 6 |
| 01***12 | Screw,(With Articulate Indicator) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Radiator Piping(#10001-10028)
| 07***63 | Hose, Breather Line | 1 |
| 07***97 | Clamp,(With Pre-Fuel Filter) | 2 |
| 07***09 | Clamp, Hose - At Water Pump | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Radiator Piping(#10029-)
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***75 | Bolt, Mount Main Relief Valve | 2 |
| 01***11 | Nut,(Not Shown) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Radiator(#10001-10028)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 10 |
| 01***80 | Bolt | 2 |
| 01***10 | Nut,L.H. Thread | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Radiator(#10029-10055)
| 01***20 | Bolt,(With Auto Emergency Steering) | 10 |
| 01***50 | Bolt,(For Strengthened Cover) | 2 |
| 01***45 | Bolt,(For Travel Motor) (Not Show) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Radiator(#10056-)
| 01***20 | Bolt,(With Auto Emergency Steering) | 10 |
| 01***50 | Bolt,(For Strengthened Cover) | 2 |
| 01***45 | Bolt,(For Travel Motor) (Not Show) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Rear Work Lamp
| 08***12 | Grommet,(Not Used For Cab Spec.) | 1 |
| 08***60 | Bulb? 60/60w | 1 |
| 23***80 | Lamp Ass'Y,Work? Front | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Speed Meter
| 08***14 | Clip,(Without Ripper Point Light) | 1 |
| 08***23 | Cable | 1 |
| 23***80 | Adapter | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Water Separator Inner Parts(#.-)
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
| 60***00 | Water Separator A.,(4d105-5h? 4d105-5t) | 1 |
| 60***60 | Plug,Drain (4d105-5h? 4d105-5t) | 1 |
Frame And Guard
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Air Conditinner (2/12) (Condensor And Mounting Parts)(#10247-)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 8 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***25 | Bolt, Pinlock | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Air Conditioner (1/12) (Air Conditioner Unit And Related Parts)(#10247-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 7 |
| 01***16 | Bolt? Wing,Wing | 2 |
| 01***10 | Washer,(For 35a Alternator) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Air Conditioner (1/9) (Cooler Unit And Related Parts)(#10108-10246)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
| 07***14 | Hose | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Air Conditioner (10/12) (Air Condenser Inner Parts)(#10247-)
| 42***30 | Condenser Ass'Y,(R134a) | 1 |
| ND***30 | Nut | 6 |
| ND***12 | Fan | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Air Conditioner (11/12) (Air Conditioner Unit 1/2)(#10247-)
| 42***10 | Air Conditioner Unit | 1 |
| ND***10 | Bracket | 1 |
| ND***40 | Clamp,See Fig. K4010-15a0 | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Air Conditioner (12/12) (Air Conditioner Unit 2/2)(#10247-)
| ND***30 | Bracket,Case | 1 |
| ND***91 | Case,Blower | 1 |
| ND***41 | Screw,See Fig. K4010-16a0 | 6 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Air Conditioner (2/9) (Condensor And Mounting Parts)(#10108-10246)
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 3 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 6 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 6 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Air Conditioner (3/12) (Compressor And Mounting Parts)(#10247-)
| 01***85 | Bolt - M8 X 85lg | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***70 | Bolt - Bracket And Oil Inlet Tubemounting | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Air Conditioner (3/9) (Compressor And Related Parts)(#10108-10246)
| 01***16 | Bolt (Op) | 6 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 6 |
| 04***20 | Ring, Snap | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Air Conditioner (4/12) (Cooler Piping)(#10247-)
| 01***20 | Bolt,(Without Air Con. Or Heater) | 1 |
| 01***25 | Capscrew | 2 |
| 01***30 | Screw | 3 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Air Conditioner (4/9) (Cooler Piping)(#10108-10246)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Air Conditioner (5/12) (Heater Piping)(#10247-)
| 01***25 | Bolt,(Rear Attachment Less) | 6 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***16 | Seat,(For Desiccant Type) (Welded) | 3 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Air Conditioner (5/9) (Heater Piping)(#10108-10246)
| 01***10 | Bolt,For Additional Rear Lamp | 1 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***16 | Seat,(For Desiccant Type) (Welded) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Air Conditioner (6/12) (Air Piping)(#10247-)
| 01***20 | Bolt,(For Mono Lever Steering) | 5 |
| 01***12 | Screw,(With Articulate Indicator) | 4 |
| 01***20 | Bolt? Wing,(Noise Suppression Spec.) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Air Conditioner (6/9) (Air Piping? Front)(#10108-10246)
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***16 | Bolt (Op) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Air Conditioner (7/12) (Control Panel)(#10247-)
| 01***12 | Bolt - M8 - 1.25 X 12 | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Air Conditioner (7/9) (Air Piping? Rear)(#10108-10246)
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***14 | Seat,(For Automatic) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Air Conditioner (8/12) (Electrlcal Parts)(#10247-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***20 | Screw,(See Fig. K0210-17a0) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Air Conditioner (8/9) (Control Panel)(#10108-10246)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***16 | Screw | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Air Conditioner (9/12) (Air Compressor Inner Parts)(#10247-)
| 20***10 | Air Compressor A. (Kit) | 1 |
| ND***70 | Clamp, Tapping | 1 |
| ND***40 | Compressor Assembly | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Air Conditioner (9/9) (Electrical Parts)(#10108-10246)
| 01***10 | Screw,(For Wiper Switch Earth) | 2 |
| 01***08 | Washer,(For Mounting First Aid Kit) | 2 |
| 08***19 | Band,(Without Air Conditioner) | 5 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Canopy(#.-)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 10 |
| 01***30 | Bolt-Hex, Bolt,(With Center Guard) | 8 |
| 01***32 | Bolt | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Canopy(#10001-.)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 10 |
| 01***30 | Bolt-Hex, Bolt,(With Center Guard) | 8 |
| 01***10 | Nut,(Without Air Conditioner) | 8 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Frame
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 18 |
| 01***75 | Bolt | 4 |
| 01***60 | Bolt, Mount Pole | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Frame (With Rops)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 18 |
| 01***75 | Bolt | 4 |
| 01***60 | Bolt, Mount Pole | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Front Weight
| 01***10 | Bolt (Op) | 4 |
| 01***19 | Nut - M24 | 4 |
| 01***60 | Washer,(Without Rops Guard? Canopy) | 8 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Front Weight (1200kg)
| 01***10 | Bolt (Op) | 6 |
| 01***19 | Nut - M24 | 6 |
| 01***60 | Washer,(Without Rops Guard? Canopy) | 12 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Front Weight (890kg)
| 01***10 | Bolt (Op) | 6 |
| 01***19 | Nut - M24 | 6 |
| 01***60 | Washer,(Without Rops Guard? Canopy) | 12 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Operator'S Cab (C-Type) (1/5)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 12 |
| 01***55 | Bolt, Mount Lh Bracket | 3 |
| 01***12 | Screw,(Wa250-1p) | 3 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Operator'S Cab (C-Type) (2/5)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Operator'S Cab (C-Type) (3/5)
| 09***00 | Button | 40 |
| 23***40 | Board,L.H | 1 |
| 23***50 | Board,R.H | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Operator'S Cab (C-Type) (4/5)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 2 |
| 01***16 | Screw | 2 |
| 01***10 | Screw (Op) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Operator'S Cab (C-Type) (5/5)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 4 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 6 |
| 01***25 | Bolt,Without Revolution Sensor | 6 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Operator'S Compartment
| 01***40 | Bolt, Mount Master Brake Cylinder | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 11 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Operator'S Compartment (With Air Conditioner)(#10108-10246)
| 01***40 | Bolt, Mount Master Brake Cylinder | 4 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Operator'S Compartment (With Air Conditioner)(#10247-)
| 01***40 | Bolt, Mount Master Brake Cylinder | 4 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 3 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 6 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Operator'S Seat (With Air Conditioner)(#10108-10246)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***12 | Screw | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Operator'S Seat Belt (With Air Conditioner)(#10108-10246)
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
| 23***10 | Belt,(For Snow Removing) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Operator'S Seat Belt (With Air Conditioner)(#10247-)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 09***01 | Belt? Lap,(78mm Wide) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Operator'S Seat Belt(#10001-10246)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 6 |
| 01***32 | Washer,(With Auto Emergency Steering) | 12 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Operator'S Seat Belt(#10247-)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 09***01 | Belt? Lap,(78mm Wide) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Operator'S Seat(#10001-10236)
| 01***14 | Bolt | 4 |
| 01***25 | Screw | 4 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Operator'S Seat(#10237-)
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 8 |
| 36***01 | Seat Ass'Y | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Radiator Guard And Engine Hood (With Combination Lamp And R. Under View Mirror)(#10243-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 17 |
| 01***32 | Washer,(With Auto Emergency Steering) | 17 |
| 23***60 | Washer | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Radiator Guard And Engine Hood(#10001-10028)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 17 |
| 01***32 | Washer,(With Auto Emergency Steering) | 17 |
| 23***60 | Washer | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Radiator Guard And Engine Hood(#10029-10242)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 17 |
| 01***32 | Washer,(With Auto Emergency Steering) | 17 |
| 23***60 | Washer | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Radiator Guard And Engine Hood(#10243-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 17 |
| 01***32 | Washer,(With Auto Emergency Steering) | 17 |
| 23***60 | Washer | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Rops Canopy
| 01***85 | Bolt | 8 |
| 01***60 | Washer,(Without Rops Guard? Canopy) | 8 |
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Frame And Guard : Side Cover
| 01***12 | Bolt,(With Cylinder Cover) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 26 |
Hydraulic System
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Blade Lift Cylinder(#10001-10028)
| 01***75 | Bolt,(Reinforced Type) | 2 |
| 01***16 | Nut - M20 | 2 |
| 01***60 | Flat Washer - M20 (Hardened) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Blade Lift Cylinder(#10029-10244)
| 01***75 | Bolt,(Reinforced Type) | 2 |
| 01***16 | Nut - M20 | 2 |
| 01***60 | Flat Washer - M20 (Hardened) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Blade Lift Cylinder(#10245-)
| 01***75 | Bolt,(Reinforced Type) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***16 | Nut - M20 | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Blade Side Shift Cylinder(#10001-10002)
| 01***12 | Screw | 1 |
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
| 07***65 | O-Ring,(F5350-62a0 -14 ) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Blade Side Shift Cylinder(#10003-10244)
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
| 07***65 | O-Ring,(F5350-62a0 -14 ) | 1 |
| 07***65 | Ring,Back-Up (Kit) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Blade Side Shift Cylinder(#10245-)
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
| 07***65 | O-Ring,(F5350-62a0 -14 ) | 1 |
| 07***65 | Ring,Back-Up (Kit) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Drawbar Side Shift Cylinder(#10001-10244)
| 01***75 | Bolt,(Reinforced Type) | 4 |
| 01***16 | Nut - M20 | 4 |
| 01***60 | Flat Washer - M20 (Hardened) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Drawbar Side Shift Cylinder(#10245-)
| 01***50 | Bolt,(With Service Valve R.H.) | 1 |
| 01***75 | Bolt,(Reinforced Type) | 4 |
| 01***16 | Nut - M20 | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Flow Divider Valve
| 23***10 | Body | 1 |
| 23***30 | O-Ring | 2 |
| 23***40 | Spring | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Front Blade Cylinder
| 07***90 | O-Ring,(Dk029369-0020) (K2) | 1 |
| 07***85 | O-Ring,(For Snow Removing) | 1 |
| 07***85 | Ring,Back-Up? Head | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Control Valve? L.H. (3-Spool)
| 23***00 | Control Valve Ass'Y,L.H | 1 |
| KB***05 | Bracket | 1 |
| KB***51 | Housing | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Control Valve? R.H. (3-Spool)
| 23***00 | Control Valve Ass'Y | 1 |
| KB***49 | Housing,Inlet | 1 |
| KB***05 | Bracket | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Control Valve? R.H. (4-Spool) (For Front Blade Or Scarifier)
| 23***00 | Control Valve Ass'Y | 1 |
| KB***49 | Housing,Inlet | 1 |
| KB***05 | Bracket | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Filter(#10001-10028)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***32 | Washer,(With Auto Emergency Steering) | 8 |
| 07***65 | O-Ring,(F5350-62a0 -14 ) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Filter(#10029-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***32 | Washer,(With Auto Emergency Steering) | 8 |
| 07***65 | O-Ring,(F5350-62a0 -14 ) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Motor
| 23***10 | Seal Ass'Y | 1 |
| 23***11 | Seal Ass'Y | 1 |
| 23***00 | Motor Ass'Y,Hydraulic | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Piping (Blade Lift Cylinder Line)(#10001-10002)
| 01***55 | Bolt,(10m) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***50 | Bolt,(With Service Valve R.H.) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Piping (Blade Lift Cylinder Line)(#10003-10028)
| 01***55 | Bolt,(10m) | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Piping (Blade Lift Cylinder Line)(#10029-10244)
| 01***55 | Bolt,(10m) | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Piping (Blade Lift Cylinder Line)(#10245-)
| 01***55 | Bolt,(10m) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Piping (Blade Shift Cylinder Line)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 1 |
| 01***45 | Bolt, Mounting Bracket To Radiator (Top) | 3 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Piping (Circle Motor Line)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Piping (Control Valve To Tank)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***11 | Nut,(With Under Mirror) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Piping (Drawbar Shift Cylinder Line)(#10001-10244)
| 01***55 | Bolt,(10m) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***50 | Bolt,(With Service Valve R.H.) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Piping (Drawbar Shift Cylinder Line)(#10245-)
| 01***55 | Bolt,(10m) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Piping (Flow Divider Valve To Control Valve)
| 01***30 | Bolt,(For Mechanical Governor) | 6 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 6 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Piping (Front Blade Cylinder Line) (1/2)
| 07***03 | Hose | 1 |
| 07***07 | Hose (Itl) | 1 |
| 08***19 | Band,(Without Air Conditioner) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Piping (Front Blade Cylinder Line) (2/2)
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***55 | Bolt,(10m) | 2 |
| 01***50 | Bolt,(With Service Valve R.H.) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Piping (Leaning Cylinder Line)(#10001-10244)
| 01***55 | Bolt,(10m) | 2 |
| 01***70 | Bolt, Mount Bracket And Oil Inlet Tube, Bolt | 1 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Piping (Leaning Cylinder Line)(#10245-)
| 01***55 | Bolt,(10m) | 2 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Piping (Scarifier Cylinder Line)
| 01***55 | Bolt,(10m) | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 6 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Piping (Tank To Pump To Flow Divider Valve)
| 01***35 | Bolt,(For Position Fixing) | 4 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Pump (For Work Equipment And Steering)(#10001-10238)
| 23***00 | Pump Ass'Y,Hydraulic | 1 |
| 23***01 | Pump Ass'Y,Hydraulic | 1 |
| KB***01 | Coupling | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Hydraulic Pump (For Work Equipment And Steering)(#10239-)
| 23***02 | Pump Ass'Y,Hydraulic | 1 |
| KB***22 | Flange | 1 |
| KB***20 | Plate,Center | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Pilot Check Valve (For Blade Lift? L.H.)
| 07***14 | O-Ring,(F4350-61a0a-20 ) | 2 |
| 07***14 | Ring,Back-Up (Kit), Ring,Back-Up; Komatsu S/N 20501-22940 - Was 07001-02014 | 1 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Pilot Check Valve (For Blade Lift? R.H.)
| 07***10 | O-Ring,Plate | 1 |
| 07***14 | O-Ring,(F4350-61a0a-20 ) | 3 |
| 07***10 | Ring,Back-Up | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Pilot Check Valve (For Front Blade Or Scarifier)
| 07***10 | O-Ring,Plate | 1 |
| 07***14 | O-Ring,(F4350-61a0a-20 ) | 3 |
| 07***10 | Ring,Back-Up | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Pilot Check Valve (For Leaning And Drawbar Shift)
| 07***14 | O-Ring,(F4350-61a0a-20 ) | 6 |
| 07***14 | Ring,Back-Up (Kit), Ring,Back-Up; Komatsu S/N 20501-22940 - Was 07001-02014 | 4 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Scarifier Cylinder
| 07***90 | O-Ring,(Dk029369-0020) (K2) | 1 |
| 07***85 | O-Ring,(For Snow Removing) | 1 |
| 07***85 | Ring,Back-Up? Head | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Swivel Joint
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 2 |
| 07***65 | O-Ring,(F5350-62a0 -14 ) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Hydraulic System : Swivel Joint (For Power Tilt)(#-)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 2 |
| 07***65 | O-Ring,(F5350-62a0 -14 ) | 2 |
Mark Plate? Tool And Kit
Komatsu : Gd621r-1(S/N 10001-Up) : Mark Plate? Tool And Kit : Marks And Plates (English)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Caution,Recommended Fuel Oil | 1 |
| 09***00 | Plate? Safety,Starting And After Operating | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Mark Plate? Tool And Kit : Service Kit (Drive System)
| 04***30 | Ring,Snap? Sprocket | 2 |
| 07***45 | O-Ring,Cover | 1 |
| 07***45 | O-Ring,(F4350-60a0 -9 ) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Mark Plate? Tool And Kit : Service Kit (Transmission)
| 07***65 | O-Ring,Injection Pump Case | 1 |
| 07***75 | O-Ring,Steering Oil Filter | 1 |
| 07***90 | O-Ring,(Dk029369-0020) (K2) | 3 |
Komatsu : Gd621r-1(S/N 10001-Up) : Mark Plate? Tool And Kit : Service Kit (Work Equipment Control)
| 07***30 | O-Ring,Housing | 1 |
| 07***20 | O-Ring,R.H. (Kit) | 1 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Mark Plate? Tool And Kit : Tables
Komatsu : Gd621r-1(S/N 10001-Up) : Mark Plate? Tool And Kit : Tool
| 01***80 | Bolt,(With Scarifier) | 1 |
| 09***06 | Wrench Set,8x10? 12x14? 13x17? | 1 |
| 09***41 | Wrench? 36x41,36x41 | 1 |
Power Train
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Drive Shaft
| 01***55 | Bolt | 8 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 8 |
| 23***00 | Drive Shaft Ass'Y | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Final Drive Case (1/2)
| 01***18 | Bolt | 16 |
| 01***22 | Bolt,(10m) | 16 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 8 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Final Drive Case (2/2)
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 18 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 18 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Final Drive Case (For No-Spin Differential Type) (1/2)(#.-)
| 01***18 | Bolt | 16 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 8 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Final Drive Case (For No-Spin Differential Type) (1/2)(#10001-.)
| 01***22 | Bolt,(10m) | 16 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 8 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Final Drive Case (For No-Spin Differential Type) (2/2)
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 18 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 18 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Final Drive Gear (1/2)
| 01***40 | Bolt,(With Service Valve R.H.) | 3 |
| 01***45 | Bolt, Mounting Bracket To Radiator (Top) | 6 |
| 01***35 | Bolt,R.H. Outside And L.H. Inside | 12 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Final Drive Gear (2/2)
| 01***45 | Bolt, Mounting Bracket To Radiator (Top) | 6 |
| 04***30 | Ring,Snap? Sprocket | 2 |
| 06***15 | Bearing | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Final Drive Gear (For No-Spin Differential Type) (1/2)
| 01***40 | Bolt,(With Service Valve R.H.) | 3 |
| 01***45 | Bolt, Mounting Bracket To Radiator (Top) | 6 |
| 01***80 | Bolt, Mount Tubes To Switch And Work Pumps | 8 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Final Drive Gear (For No-Spin Differential Type) (2/2)
| 01***45 | Bolt, Mounting Bracket To Radiator (Top) | 6 |
| 04***30 | Ring,Snap? Sprocket | 2 |
| 06***15 | Bearing | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Front Axle (1/3)
| 01***45 | Bolt | 2 |
| 01***35 | Bolt | 1 |
| 01***13 | Nut | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Front Axle (2/3)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 6 |
| 01***50 | Bolt | 16 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Front Axle (3/3)
| 01***35 | Bolt,(With Rops) | 3 |
| 01***10 | Nut,Lock | 3 |
| 01***23 | Nut | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Joint
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 24 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 24 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Leaning Cylinder(#10001-10244)
| 07***80 | O-Ring,Hydraulic Oil Filter | 1 |
| 07***75 | O-Ring,Cylinder Head | 1 |
| 07***75 | Ring,Back-Up (Kit) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Leaning Cylinder(#10245-)
| 07***80 | O-Ring,Hydraulic Oil Filter | 1 |
| 07***75 | O-Ring,Cylinder Head | 1 |
| 07***75 | Ring,Back-Up (Kit) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Parking Brake(#10001-10238)
| 01***60 | Screw | 1 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 1 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Parking Brake(#10239-)
| 01***60 | Screw | 1 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 1 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Steering Cylinder(#10001-10244)
| 04***20 | Ring, Snap | 2 |
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
| 07***55 | O-Ring,(F4350-62a1 -14 ) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Steering Cylinder(#10245-)
| 04***20 | Ring, Snap | 2 |
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
| 07***55 | O-Ring,(F4350-62a1 -14 ) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Steering Piping (1/2)
| 01***30 | Bolt,(For Mechanical Governor) | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Steering Piping (2/2)(#10001-10244)
| 01***40 | Bolt,(With Air Conditioner) | 1 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 1 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Steering Piping (2/2)(#10245-)
| 01***40 | Bolt,(With Air Conditioner) | 1 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 1 |
| 23***70 | Hose | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Steering Valve (1/2)
| 23***20 | Ring | 1 |
| 23***60 | Bearing Ass'Y | 1 |
| 23***90 | Screw,Set | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Steering Valve (2/2)
| 23***40 | Housing Ass'Y | 1 |
| 23***90 | Valve Sub Ass'Y | 1 |
| 23***70 | Spring | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Tandem Drive Case
| 01***30 | Bolt,(Not Used With Emergency Str.) | 16 |
| 01***40 | Bolt,(With Service Valve R.H.) | 12 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 28 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Tandem Drive Gear And Chain
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***40 | Bolt,(With Service Valve R.H.) | 6 |
| 01***40 | Bolt,(With Center Guard) | 18 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (1st Clutch)(#10001-10238)
| 01***00 | Bolt,(For Front Brake Release) | 15 |
| 01***32 | Washer, (Without Emergency Steering) | 15 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (1st Clutch)(#10239-)
| 01***00 | Bolt,(For Front Brake Release) | 15 |
| 01***32 | Washer, (Without Emergency Steering) | 15 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (2nd Clutch)(#10001-10238)
| 01***70 | Capscrew | 2 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 2 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (2nd Clutch)(#10239-)
| 01***70 | Capscrew | 2 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 2 |
| 04***34 | Pin-Dowel, Pin,Dowel (For Shipping) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (Control Valve Cover)(#10001-10238)
| 01***50 | Capscrew | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(With Body Positioner) | 12 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (Control Valve Cover)(#10239-)
| 01***50 | Capscrew | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(With Body Positioner) | 12 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (Control Valve) (1/2)(#10001-10238)
| 01***30 | Bolt - M8 X 30lg | 10 |
| 01***45 | Screw | 4 |
| 01***50 | Capscrew | 9 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (Control Valve) (1/2)(#10239-)
| 01***30 | Bolt - M8 X 30lg | 10 |
| 01***45 | Screw | 4 |
| 01***50 | Capscrew | 9 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (Control Valve) (2/2)(#10001-10238)
| 01***50 | Capscrew | 2 |
| 01***60 | Bolt,(With Body Positioner) | 3 |
| 01***30 | Bolt,(With Body Positioner) | 8 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (Control Valve) (2/2)(#10239-)
| 01***50 | Capscrew | 2 |
| 01***60 | Bolt,(With Body Positioner) | 3 |
| 01***30 | Bolt,(With Body Positioner) | 8 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (Forward And 3rd Clutch)(#10001-10238)
| 04***34 | Pin-Dowel, Pin,Dowel (For Shipping) | 2 |
| 04***18 | Ring,Snap (Without R.P.C.U.) | 2 |
| 04***20 | Ring, Retainer | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (Forward And 3rd Clutch)(#10239-)
| 04***34 | Pin-Dowel, Pin,Dowel (For Shipping) | 2 |
| 04***18 | Ring,Snap (Without R.P.C.U.) | 2 |
| 04***20 | Ring, Retainer | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (Low And Hight Clutch)(#10001-10238)
| 01***70 | Capscrew | 2 |
| 01***85 | Bolt | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 7 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (Low And Hight Clutch)(#10239-)
| 01***70 | Capscrew | 2 |
| 01***85 | Bolt | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 7 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (Output Shaft)(#10001-10238)
| 01***30 | Bolt | 4 |
| 01***16 | Bolt - Box Mounting | 4 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 25 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (Output Shaft)(#10239-)
| 01***16 | Bolt - Box Mounting | 4 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 25 |
| 01***50 | Bolt | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (Power Take Off)(#10001-10238)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 2 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 4 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 9 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (Power Take Off)(#10239-)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 2 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 4 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 14 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (Reverse Clutch)(#10001-10238)
| 01***00 | Bolt | 2 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 2 |
| 04***34 | Pin-Dowel, Pin,Dowel (For Shipping) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (Reverse Clutch)(#10239-)
| 01***00 | Bolt | 2 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 2 |
| 04***34 | Pin-Dowel, Pin,Dowel (For Shipping) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (Transfar Case)(#10001-10238)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 17 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (Transfar Case)(#10239-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 17 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (Transmission Case)(#10001-10238)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 5 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission (Transmission Case)(#10239-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
| 04***24 | Pin,Dowel (For No.3 Housing) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission Oil Filter(#10001-10027)
| 01***70 | Bolt, Accumulator Mounting Bracket | 4 |
| 01***36 | Wahser-Spring, Washer,Spring (Without Towing Winch) | 4 |
| 04***12 | Ring, Snap | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission Oil Filter(#10028-10238)
| 01***60 | Bolt | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
| 04***12 | Ring, Snap | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission Oil Filter(#10239-)
| 23***03 | Filter Ass'Y | 1 |
| 23***10 | Head | 1 |
| 23***20 | Cartridge | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission Piping(#10001-10027)
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
| 01***35 | Bolt,(For Position Fixing) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 11 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission Piping(#10028-10238)
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
| 01***35 | Bolt,(For Position Fixing) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission Piping(#10239-)
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***50 | Bolt,(With Service Valve R.H.) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission Pump(#10001-10238)
| 23***00 | Pump Ass'Y | 1 |
| 23***01 | Pump Ass'Y | 1 |
| 23***02 | Pump Ass'Y | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Power Train : Transmission Pump(#10239-)
| 23***03 | Pump Ass'Y,Transmission | 1 |
| KB***22 | Flange | 1 |
| KB***12 | Seal Kit,Transmission Pump | 1 |
S6d105-1pp Engine S/N 81520-Up
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Additional Fuel Filter Cartridge
| 60***21 | Cartridge,Fuel Filter | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Air Cleaner (Sandy And Dusty Spec.)
| 04***10 | Ring,See Fig. K4010-65a0 | 1 |
| 08***01 | Indicator,Dust (Japanese-English) | 1 |
| 09***61 | Plate? Instruction,(Japanese-English) (Not Shown) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Air Cleaner(#81520-92778)
| 04***10 | Ring,See Fig. K4010-65a0 | 1 |
| 08***35 | Indicator,Dust (Japanese-English) | 1 |
| 09***61 | Plate? Instruction,(Japanese-English) (Not Shown) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Air Cleaner(#92779-)
| 08***01 | Indicator,Dust (Japanese-English) | 1 |
| 08***01 | Indicator,Dust Indicator | 1 |
| 09***61 | Plate? Instruction,(Japanese-English) (Not Shown) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Air Compressor
| 61***12 | Air Compressor Ass'Y | 1 |
| DK***00 | Cylinder | 1 |
| DK***90 | Washer,Air Compressor | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Air Compressor Piping
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 4 |
| 01***16 | Washer,Radio Controlled Slag Handling | 4 |
| 04***16 | Key, Lever Mounting | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Air Intake Manifold And Connection
| 01***50 | Bolt,(For Trimming Dozer) | 2 |
| 01***65 | Bolt,(For Alternator Bracket Mount) | 10 |
| 01***70 | Bolt | 3 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Alternator (25a) (With Hardening Pulley) (Sandy And Dusty Spec.)
| 60***30 | Alternator A. (25a),(With Hardening Pulley) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***80 | Collar | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Alternator (25a) (With Non Hardening Pulley)
| 60***30 | Alternator A. (25a),(With Non Hardening Pulley) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***70 | Bracket,Front | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Alternator (35a) (With Hardening Pulley) (Cold Terrain Spec.) (Except Japan)
| 60***40 | Alternator A. (35a),(With Hardening Pulley) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***80 | Collar | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Alternator (35a) (With Hardening Pulley) (Sandy And Dusty Spec.) (Except Japan)
| 60***40 | Alternator A. (35a),(With Hardening Pulley) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***80 | Collar | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Alternator And Mounting (25a) (Bracket Less Type)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***35 | Bolt,(Cold Weather Spec.) | 1 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Alternator And Mounting (25a) (Bracket Mounting Type) (Sandy And Dusty Spec.)(#81520-92778)
| 01***25 | Bolt | 1 |
| 01***70 | Bolt,(With Wear Guard) | 1 |
| 01***35 | Bolt,(Cold Weather Spec.) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Alternator And Mounting (25a) (Bracket Mounting Type) (Snady And Dusty Spec.)(#92779-)
| 01***45 | Bolt,(For Suction? Reversible Fan) | 1 |
| 01***35 | Bolt,(Cold Weather Spec.) | 1 |
| 01***40 | Bolt,(Shim 3-Piece) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Alternator And Mounting (35a) (Bracket Mounting Type) (Cold Treeain)
| 01***45 | Bolt,(For Suction? Reversible Fan) | 1 |
| 01***35 | Bolt,(Cold Weather Spec.) | 1 |
| 01***40 | Bolt,(Shim 3-Piece) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Alternator And Mounting (35a) (Bracket Mounting Type) (Snady And Dusty Spec.)
| 01***45 | Bolt,(For Suction? Reversible Fan) | 1 |
| 01***35 | Bolt,(Cold Weather Spec.) | 1 |
| 01***40 | Bolt,(Shim 3-Piece) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Camshaft And Tappet
| 01***25 | Bolt,(Without Auto Priming System) | 2 |
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Corrosion Resistor And Piping
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 4 |
| 01***29 | Washer,Spring (Cold Weather Spec.) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Crankshaft
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Cylinder Block
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 4 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Cylinder Head
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Cylinder Head Cover
| 04***10 | Clip,(See Fig.0311a Or 0321) | 1 |
| 07***23 | Clamp - Hose | 1 |
| 07***30 | Clip | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Engine Stop Motor And Mounting(#114158-)
| 01***20 | Bolt,See Fig. K4010-11a0 | 3 |
| 01***35 | Bolt,R.H. (For Add. Air Compressor) | 4 |
| 01***95 | Screw | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Exhaust Manifold And Turbocharger
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Flywheel And Flywheel Housing
| 01***40 | Bolt,(Dust And Dirt Protection) | 9 |
| 01***60 | Bolt, Trunnion Cap | 2 |
| 01***35 | Screw | 6 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Front Cover And Gear
| 01***22 | Bolt,(Cold Terrain Spec.) | 4 |
| 01***25 | Bolt,(Without Auto Priming System) | 4 |
| 01***60 | Bolt,(Without Alternator Bracket) | 10 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Fuel Filter And Piping(#81520-92778)
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 2 |
| 01***16 | Washer,Radio Controlled Slag Handling | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Fuel Filter And Piping(#92779-)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Fuel Injection Pump (Coupling)(#81520-111311)
| DK***00 | Bolt | 1 |
| DK***00 | Washer,Lock | 2 |
| DK***00 | Coupling,Cross | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Fuel Injection Pump (Feed Pump)(#81520-111311)
| DK***20 | Bolt, Joint | 1 |
| DK***20 | Pump,Priming | 1 |
| DK***20 | Housing | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Fuel Injection Pump (Governor) (1/2)(#81520-111311)
| DK***00 | Adapter | 1 |
| DK***80 | Nut | 1 |
| DK***20 | Lever | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Fuel Injection Pump (Governor) (2/2)(#81520-111311)
| DK***80 | Shim? 0.5mm | 0 |
| DK***00 | Washer,Spring | 1 |
| DK***40 | Gasket,Air Compressor | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Fuel Injection Pump (Pump)(#81520-111311)
| 61***50 | Injection Pump Ass'Y | 1 |
| 61***60 | Injection Pump Ass'Y,(Farming Spec.) | 1 |
| DK***10 | Washer,Spring | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Fuel Injection Pump And Piping
| 01***70 | Bolt | 4 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 1 |
| 01***30 | Bolt,(For France Noise Suppression) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Fuel Nozzle And Spill Pipe
| 01***55 | Bolt,(For Trimming Dozer) | 12 |
| 01***55 | Screw | 12 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 12 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Gasket Kit
| 07***18 | O-Ring,(See Fig.1601-29?1602-17) | 1 |
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
| 07***00 | O-Ring,(F4350-65a1 -5 ) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Heater Switch And Heater Signal
| 60***70 | Switch,Air Intake Heater | 1 |
| 60***71 | Signal,Signal | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Lubricating Oil Cooler (Cold Terrain Spec.)(#121604-)
| 01***65 | Bolt | 2 |
| 01***20 | Bolt,(Forwarded Individually Parts) | 6 |
| 01***25 | Bolt - Relay Mounting | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Lubricating Oil Cooler(#81520-92778)
| 01***25 | Bolt,(Without Auto Priming System) | 5 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 3 |
| 01***35 | Bolt,(Without Auto Priming System) | 16 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Lubricating Oil Cooler(#92779-)
| 01***25 | Bolt,(Without Auto Priming System) | 5 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 3 |
| 01***35 | Bolt,(Without Auto Priming System) | 16 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Lubricating Oil Filter And Mounting(#81520-92778)
| 01***65 | Bolt,(For Alternator Bracket Mount) | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 7 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Lubricating Oil Filter And Mounting(#92779-)
| 01***90 | Bolt | 1 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 1 |
| 01***25 | Bolt (M10x1.50x25) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Lubricating Oil Piping(#81520-92778)
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***95 | Bolt | 1 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Lubricating Oil Pump And Suction Pipe
| 01***25 | Bolt,(Without Auto Priming System) | 3 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
| 01***45 | Bolt,(S6d155-4b) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Muffler And Mounting(#81520-92778)
| 01***40 | Bolt,(For Position Fixing) | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Muffler And Mounting(#92779-)
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 6 |
| 01***16 | Bolt | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Oil Pan
| 01***22 | Bolt,(Cold Terrain Spec.) | 28 |
| 01***25 | Bolt,(Without Auto Priming System) | 8 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Oil Pan (Cold Terrain Spec.) (Except Japan)(#121772-)
| 01***20 | Bolt,(Forwarded Individually Parts) | 38 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 07***22 | O-Ring,(See Fig.Y1852-01a0) | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Piston And Connecting Rod
| 04***18 | Ring, Retaining | 12 |
| 61***40 | Crank Pin Metal A | 6 |
| 61***40 | Crank Pin Metal A | 6 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Rocker Arm
| 01***80 | Bolt,(Shim 5 Pieces Over) | 2 |
| 01***06 | Nut, Regular Hexagon (M8-1.25) | 12 |
| 01***36 | Washer,Radio Controlled Slag Handling | 6 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Starting Motor (5.5kw)
| 60***90 | Starting Motor Ass'Y,(5.5kw) | 1 |
| 60***91 | Starting Motor Ass'Y,(5.5kw) | 1 |
| KD***30 | Bracket,Center | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Starting Motor (7.5kw) (Cold Terrain Spec.) (Except Japan)
| 60***50 | Starting Motor Ass'Y,(7.5kw) | 1 |
| KD***60 | Shift Lever Assembly | 1 |
| KD***40 | Spring,Spring | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Starting Motor And Mounting (5.5kw)
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 3 |
| 01***30 | Bolt, Mounting - Front Hand Rails | 3 |
| 01***36 | Washer,Radio Controlled Slag Handling | 3 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Starting Motor And Mounting (7.5kw) (Cold Terrain Spec.) (Except Japan)
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 3 |
| 01***30 | Bolt, Mounting - Front Hand Rails | 3 |
| 01***36 | Washer,Radio Controlled Slag Handling | 3 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Turbocharger
| 61***00 | Turbocharger Ass'Y,(T04b-59) | 1 |
| GA***00 | Clamp | 3 |
| GA***01 | Bolt | 6 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Turbocharger Lubricating Oil Piping
| 01***22 | Bolt,(Cold Terrain Spec.) | 2 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : S6d105-1pp Engine S/N 81520-Up : Water Pump And Cooling Fan
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***25 | Bolt,(Without Auto Priming System) | 2 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 3 |
Wheel
Komatsu : Gd621r-1(S/N 10001-Up) : Wheel : Wheel And Tubed Tire
| 23***02 | Tire Ass'Y,(Yokohama) | 1 |
| 23***12 | Tire | 1 |
| 23***20 | Tube | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Wheel : Wheel And Tubed Tire (14.00-24-12pr)
| 23***00 | Tire Ass'Y,14.00-24-12pr | 1 |
| 23***10 | Tire | 1 |
| 23***20 | Tube | 1 |
Komatsu : Gd621r-1(S/N 10001-Up) : Wheel : Wheel Brake
| 01***35 | Bolt,(For Position Fixing) | 2 |
| 01***10 | Nut,(Without Air Conditioner) | 4 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 4 |
Work Equipment
Komatsu : Gd621r-1(S/N 10001-Up) : Work Equipment : Blade Lifter
| 01***55 | Bolt, Mount Lh Bracket | 4 |
| 01***35 | Bolt, Hydraulic Tank Mounting | 4 |
| 01***19 | Nut - M24 | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Work Equipment : Blade(#10001-10002)
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
| 01***36 | Wahser-Spring, Washer,Spring (Without Towing Winch) | 4 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 36 |
Komatsu : Gd621r-1(S/N 10001-Up) : Work Equipment : Blade(#10003-)
| 01***45 | Washer,(For Travel Motor) (Not Show) | 36 |
| 07***10 | Plug | 4 |
| 23***43 | Edge,Cutting (Width 6 Feet) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Work Equipment : Blade? Width 4000mm
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
| 01***40 | Bolt,(With Center Guard) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Work Equipment : Blade? Width 4300mm
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
| 01***40 | Bolt,(With Center Guard) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Work Equipment : Circle Reverse Gear (1/2)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***55 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***35 | Stud | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Work Equipment : Circle Reverse Gear (2/2)
| 01***20 | Bolt,(With Auto Emergency Steering) | 1 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 2 |
| 01***55 | Bolt | 6 |
Komatsu : Gd621r-1(S/N 10001-Up) : Work Equipment : Circle Support
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***35 | Bolt,R.H. Outside And L.H. Inside | 4 |
| 01***40 | Bolt,(With Center Guard) | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Work Equipment : Drawbar
| 01***15 | Bolt (Kit) | 1 |
| 01***35 | Bolt,(For Shipping) | 9 |
| 01***50 | Bolt | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Work Equipment : Front Blade
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 8 |
| 01***40 | Bolt | 8 |
| 01***19 | Nut - M24 | 4 |
Komatsu : Gd621r-1(S/N 10001-Up) : Work Equipment : Scarifier
| 01***65 | Bolt,(With Canvas Or Rops Canopy) | 8 |
| 01***00 | Bolt,(Without Cab) | 2 |
| 01***00 | Bolt (Op) | 2 |
Komatsu : Gd621r-1(S/N 10001-Up) : Work Equipment : Scarifier Lifter
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***10 | Bolt (Op) | 4 |
| 01***00 | Bolt | 2 |
Frequently asked questions
What engine does the Komatsu GD621R-1 use?
The Komatsu GD621R-1 uses the S6D105-1 six-cylinder diesel engine, producing 155.6 hp (116 kW) at 2500 rpm.
What is the operating weight of the Komatsu GD621R-1?
The standard operating weight is approximately 27,999 lb (12,700 kg), varying by configuration and attachments.
What model replaced the Komatsu GD621R-1?
The GD621R-1 was succeeded by the GD623A-1 and GD623R-1 models in the Komatsu motor grader lineup.
What GD621R-1(S/N 10001-UP) owners discuss
What engine powers the GD621R-1 and what are its key power specifications?
The GD621R-1 uses the Komatsu S6D105-1 engine. It produces 155.6 hp (116 kW) net power at 2500 rpm. Displacement is 396.1 cu in (6,491 cu cm). The engine has 6 cylinders. Power is measured at the flywheel. Net power is rated for gears 5-6. Max power is 155.6 hp. Variations in power output may occur based on configuration or series updates from the factory spec sheet. Always verify with your dealer for exact serial range specifications.
What are the typical undercarriage and tire specifications for this model?
Standard tire size is 13.00-24-10PR. The machine has a tandem axle wheelbase of 5.04 ft (1.54 m). Front axle ground clearance is 1.2 ft (0.37 m). Rear ground clearance is 1.17 ft (0.36 m). Turning radius is 34.2 ft (10.43 m). Width over tires is 7.86 ft (2.40 m). Undercarriage wear patterns are typical for motor graders in this weight class. Check tire condition and tandem axle components regularly. Have your dealer verify undercarriage wear limits for your specific usage hours.
How does the hydroshift transmission behave and what are its gear specifications?
The GD621R-1 uses a hydroshift transmission with 6 forward gears. Max forward speed is 27.8 mph (44.74 kph). Max reverse speed is 33.9 mph (54.56 kph). The transmission includes a tandem drive and final drive assembly. Differential locking is available. Inching pedal travel and operating force require periodic adjustment. Transmission oil pressure and machine type settings must be checked per the shop manual. Transmission control valve operation affects shift quality. Have your dealer verify transmission pressure settings for your serial range.
What are the common hydraulic system behaviors and maintenance points?
The hydraulic system includes a main pump, control valve, and blade cylinders. Blade accumulator system may be equipped. Hydraulic oil capacity is not explicitly stated in the provided specs but is covered in the operation and maintenance manual. Check hydraulic oil level and temperature regularly. Hydraulic drift is a common diagnostic point for control valves. Flow divider and pilot check valve operation affect circle rotation. Hydraulic oil cooling flow passes through the oil cooler. Have your dealer verify hydraulic pump and control valve pressures for your specific machine.
What are the known electrical and sensor issues for this series?
The GD621R-1 uses an Electronic Vehicle Monitoring System (EVMS). Common issues include monitor panel display failures when the starting switch is turned on. Fault codes M-1 through M-18 cover various sensor and circuit checks. Check battery state of charge and chassis grounds. Alternator system and engine oil pressure circuit faults are common diagnostic points. Connector positions for D, P, and Q types are critical for troubleshooting. Air conditioning system operation is monitored. Have your dealer verify EVMS sensor calibration and connector integrity for your serial range.
What are the critical dimensions and weight specifications for transport and operation?
Overall length is 27.5 ft (8.38 m). Height to top of isomount cab is 11.44 ft (3.49 m). Blade base is 8.54 ft (2.60 m). Moldboard width is 12.2 ft (3.72 m). Moldboard height is 25.4 in (0.65 m). Std operation weight total is 27,998.8 lb (12,700 kg). Fuel capacity is 75.3 gal (285 l). Wheelbase is 19.69 ft (6.00 m). These dimensions affect transport planning and jobsite fit. Actual equipment may vary with options. Have your dealer verify exact weight and dimensions for your specific configuration.
What should be checked when buying a used GD621R-1(S/N 10001-UP)?
Verify the engine model is S6D105-1. Check the EVMS for fault codes M-1 to M-18. Inspect the hydroshift transmission for proper inching pedal function and oil pressure. Test all hydraulic functions for drift and speed. Check the blade accumulator if equipped. Inspect the tandem axle and final drives for noise and leaks. Verify tire condition and pressure. Check the cooling package for blockage. Review the service history for filter changes. Have your dealer verify the exact serial range specifications and engine calibration for your specific machine.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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