Komatsumotor grader(no series)
Komatsu GD605A-3(S/N 54001-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu GD605A-3 (S/N 54001-UP) is a heavy-class articulated motor grader built for road construction, grading and general civil earthmoving. It runs a Komatsu 6D125-1Q inline-six diesel, mechanically governed with an inline fuel-injection pump and no electronic control module. Standard operating weight is approximately 14,970 kg (33,000 lb), with an overall length near 8.53 m (28 ft), width near 2.59 m (8 ft 6 in) and height near 3.35 m (11 ft); exact figures shift with blade, scarifier and cab or canopy fitment. It was built alongside the larger-class GD655A-3 grader under a shared operation and maintenance manual, and this 54001-UP block is the Japan/export-market chassis, distinct in fit from the GD605A-3US (S/N 57001-UP) built specifically for the U.S. market. Its predecessor was the GD605A-2, and Komatsu continued the 605A line domestically afterward. Factory configurations covered cab or canopy operator stations, scarifier attachments and blade options for road-maintenance and site-grading work.
Through the -3 generation Komatsu kept a mechanically governed diesel and a hydraulic-over-mechanical circle, drawbar and blade control scheme rather than the electronically managed engines used on later dual-mode-transmission graders. The monitor panel's M-1 through M-6 caution-lamp bank, covering engine oil pressure, transmission controller status, transmission oil temperature, differential oil temperature, bank/frame-lock pin position and brake oil pressure, is the machine's only electronic warning layer; there is no fault-code system behind it. Komatsu carried the 605A designation forward domestically through later Japan-market updates, while its export lineup was eventually renumbered into the GD655 and GD675 series as those platforms adopted electronic and dual-mode transmissions. That mechanical simplicity is a large part of why the GD605A-3 still holds a place in the used and parts market: a non-ECM fuel system and analog controls are field-diagnosable and reboatable without proprietary diagnostic tools, and tandem final drives, circle assemblies and the 6D125-1Q engine are durable, well-understood components to rebuild. Because the 54001-UP and 57001-UP blocks differ in chassis fit, buyers and parts sourcers should confirm the serial range before ordering chassis-specific components.
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 GD605A-3(S/N 54001-UP) specifications
Engine
| Engine model | Komatsu 6D125-1Q diesel, tied to this S/N 54001-UP production range |
| Type | 4-cycle, water-cooled, overhead-valve diesel, naturally aspirated (6D125 family architecture) |
| Cylinders | 6 |
| Bore x stroke | 125 mm x 150 mm (4.92 in x 5.91 in), per 6D125-family architecture |
| Piston displacement | approx. 11.05 L (674 cu in), per 6D125-family architecture |
| Gross power | Not independently confirmed for the 6D125-1Q rating used on this serial range - verify with dealer or shop manual. Same-era naturally aspirated 6D125 units in comparable Komatsu graders are factory-rated around 116 kW (155 HP) at 2200 rpm |
| Emissions tier | Pre-emissions-regulation, mechanical diesel (1980s-era production); no EPA/EU tier applicable |
Weights
| Operating weight | approx. 14,970 kg (33,000 lb) - published as a single figure, not broken out by configuration for this serial range |
| Front/rear axle split | Not documented for this specific serial range - verify with dealer or shop manual |
| Ground pressure | Not published for this model |
Dimensions
| Overall length | approx. 8.53 m (28 ft 0 in) |
| Overall width | approx. 2.59 m (8 ft 6 in) |
| Overall height | approx. 3.35 m (11 ft 0 in) |
| Wheelbase / track gauge / ground clearance | Not documented for this specific serial range in available sources - verify with dealer or shop manual |
Performance
| Travel speeds (forward/reverse) | Not documented for this specific serial range in available sources - verify with dealer or shop manual |
| Drawbar pull / gradeability | Not published for this specific serial range |
Service capacities (summary)
| Fuel tank, hydraulic system, engine oil, cooling system | Not documented for this specific serial range in available sources - refer to the factory shop manual or a dealer for exact refill capacities |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
GD605A-3(S/N 54001-UP) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | Not publicly documented for this exact S/N range (54001-UP) — check the machine's OMM lubricant chart or dealer for the exact liter/US gal figure. | Komatsu genuine EO engine oil, grade selected from Komatsu's ambient-temperature viscosity chart (typical range EO10W-30 for general duty, heavier EO15W-40 in hot climates, lighter EO0W-20/0W-30 in cold climates). Engine family for this grader is the Komatsu 6D125 series (SAA6D125E electronic variant reported for related GD605A/GD655A graders); exact suffix for the 54001-UP build is not confirmed in available public sources. |
| Cooling system (radiator + engine block) | Not publicly documented for this exact S/N range — verify with OMM or dealer. | Komatsu genuine coolant (AF-NAC type permanent antifreeze/coolant), factory pre-mixed for year-round use; follow the OMM's freeze-point mix ratio for local climate. |
| Fuel tank | Not publicly documented for this exact S/N range — verify with OMM or dealer. | Diesel fuel meeting the sulfur-content and cetane requirements in the OMM; use low-sulfur diesel where required by local emissions rules. |
| Torque converter / power train (transmission) case | Not publicly documented for this exact S/N range — verify with OMM or dealer. | Komatsu genuine TO powertrain/transmission oil, viscosity grade per the OMM's ambient-temperature chart (commonly TO10 or TO30 grade oils across this Komatsu grader class). |
| Final drives (each side, left and right) | Not publicly documented for this exact S/N range — verify with OMM or dealer. | Komatsu genuine TO powertrain/gear oil, same family as used for the transmission unless the OMM specifies a distinct final-drive-only spec; check level at each side independently. |
| Hydraulic system and tank | Not publicly documented for this exact S/N range — verify with OMM or dealer. | Komatsu genuine HO hydraulic oil, viscosity grade chosen by ambient temperature per the OMM chart (commonly HO46 for moderate climates, with lighter/heavier grades for cold/hot extremes). |
| Circle drive gearbox / other driveline compartments (if fitted) | Not documented in available public sources for this serial range. | Follow the OMM lubrication chart; Komatsu grader circle/drawbar drive components typically share the powertrain TO-grade oil or a dedicated gear oil spec called out separately in the chart. |
| Grease points (blade, circle, drawbar, articulation, etc.) | Spec only — no volume figure; apply per OMM grease interval schedule. | Komatsu genuine multipurpose grease (G2-LI type lithium-based grease), NLGI grade per OMM; use a low-temperature grade in cold climates if called out in the chart. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu GD605A-3(S/N 54001-UP) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
Servicing the GD605A-3(S/N 54001-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
The 6D125-1Q has no ECM and logs no wear trends on its own, so condition monitoring on this grader depends on scheduled sampling. Pull oil samples from the engine, transmission, tandem final drives and hydraulic tank at set intervals to catch bearing and gear wear early. Watch the M-1 through M-6 caution lamps at every startup; they are the only built-in early-warning layer. Track injector and mechanical injection-pump condition by watching for smoke, hard starting or rough idle rather than a stored code.
Corrective & Common Repairs
Expect wear at the circle-to-drawbar wear strips, drawbar ball-and-socket joint and wheel-lean cylinders from constant grading loads. Tandem chain and gear wear inside the final drive housings is the other common failure point on high-hour units. Because there is no fault-code system, monitor-lamp complaints are traced directly through wiring and sensors at the transmission controller, oil-pressure switch and temperature senders. Mechanical injection pump and injector service is periodic corrective work rather than plug-in diagnostics.
Overhaul & Rebuild Points
Major rebuild work centers on the tandem final drives (gears, bearings, chains), the circle turn gear and wear shoes, and the drawbar and articulation-joint bushings that carry grading loads. On the 6D125-1Q, in-frame overhaul covers cylinder liners, main and rod bearings and injection pump recalibration. Hydraulic pump and cylinder reseals follow wear identified through oil analysis and lost-pressure symptoms rather than a stored fault.
Seasonal & Environment Servicing
Cold-weather starts on this non-ECM diesel depend on glow/ether starting aids and correct-viscosity engine and hydraulic oil rather than any electronic cold-start logic. Protect the cooling system with adequate antifreeze concentration and drain the fuel/water separator more often in wet or humid seasons. In dusty or muddy environments, reseal and regrease the circle turn gear, tandem cases and articulation joint more frequently, and check tire condition or chain fitment for the terrain.
GD605A-3(S/N 54001-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 07281-00197 | Clamp,(With Pre-Fuel Filter) | Fuel system service | Check fitment → |
| 08147-22400 | Lamp,Caution? Engine Oil Filter | Lubrication service | Check fitment → |
| ND090438-0420 | Shim? 1.9mm,Element Holder | Scheduled service item | Check fitment → |
| ND090438-0400 | Shim? 1.8mm,Element Holder | Scheduled service item | Check fitment → |
| ND090438-0430 | Shim? 1.95mm,Element Holder | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
GD605A-3(S/N 54001-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| M-1 | Engine oil pressure caution lamp lights | Low engine oil level, clogged oil filter, worn oil pump, or a faulty oil pressure sensor/wiring | Stop the engine immediately, check oil level and top up, inspect the oil pressure sensor and wiring before restarting |
| M-2 | Transmission controller caution lamp lights | Powershift transmission controller detects an internal fault or a sensor/wiring fault in the shift circuit | Check transmission control wiring and connectors for damage or corrosion, then have the controller tested and replaced if the fault repeats |
| M-3 | Transmission oil temperature caution lamp lights | Low transmission oil level, clogged oil cooler, or sustained high-load operation | Reduce load and let the machine idle to cool, then check oil level and inspect the cooler for blockage |
| M-4 | Differential oil temperature caution lamp lights (where equipped) | Low differential oil level or prolonged high-torque operation overheating the final drive | Stop and allow the differential to cool, then check oil level and look for a cooling circuit restriction |
| M-5 | Bank (frame lock) pin caution lamp lights | The articulation frame-lock pin is not fully engaged or disengaged for the current operating mode, often from a misaligned pin or faulty position switch | Verify the pin position matches transport or working mode, then inspect the pin linkage and position switch |
| M-6 | Brake oil pressure caution lamp lights | Low hydraulic brake accumulator pressure, low brake fluid, or a faulty charging pump or valve | Stop the machine safely and do not operate with low brake pressure, then check accumulator charge pressure and fluid level |
| Coolant temperature caution lamp | Engine coolant temperature above normal operating range | Low coolant level, blocked or dirty radiator, slipping or broken fan belt | Stop and let the engine cool, check coolant level, inspect radiator and belt condition before restarting |
| Battery charge (alternator) caution lamp | Charging system voltage below normal | Failed or worn alternator, loose or broken drive belt, loose or corroded wiring connection | Check belt tension and condition, test alternator output, inspect battery and charging circuit wiring |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
GD605A-3(S/N 54001-UP) attachments & work tools
Moldboard / grading blade
Curved steel moldboard is the primary work tool, class-typical length around 3.7 m (12 ft), with a replaceable through-hardened cutting edge and reversible end bits. Exact width/thickness for this specific serial range is not independently documented; treat published figures as class-typical and verify with your dealer for the 54001-up build.
Drawbar-circle-moldboard mounting
The blade bolts to a drawbar-mounted circle rather than a pin-grab quick coupler. The circle gives full 360-degree rotation with hydraulic blade lift, side shift, and anti-drift check valves holding the blade position under load.
Rear-mounted ripper/scarifier
Optional rear attachment fitted via a pusher plate on the rear frame, using the grader's rear hydraulic ripper circuit. Class-typical setups offer a small number of ripper shank holders or a wider row of scarifier shank slots for breaking hardpan or old pavement behind the machine.
Mid-mounted (front) scarifier
V-type scarifier mounted ahead of the front axle/under the frame, hydraulically raised and lowered, with multiple shanks and replaceable points. Loosens hard-packed material ahead of the moldboard pass; class-typical shank counts run roughly 9 to 11, varies by configuration/series.
Moldboard extensions
Bolt-on left/right blade extension wings widen the grading swath without swapping the full moldboard. Class-typical extension length is on the order of 0.5-0.6 m per side; exact size for this model not separately confirmed.
Front push/dozer-blade provisions
Graders in this weight class commonly offer front frame provisions for a push-type blade or snow wing attachment. Not documented by name for this exact serial range in available sources -- confirm availability and mounting kit with a Komatsu dealer.
Cab/guarding and lighting configuration
Factory configuration options in this class typically include a ROPS/FOPS-rated enclosed cab, rear counterweight for ripper/scarifier balance, and work-light packages front and rear. These are factory build options rather than swappable work tools.
All GD605A-3(S/N 54001-UP) assemblies by section
Every catalogued assembly group for the Komatsu GD605A-3(S/N 54001-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
6d125-1q Engine S/N 10001-Up
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Air Cleaner
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 6 |
| 01***16 | Washer,Radio Controlled Slag Handling | 6 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Air Intake Manifold And Connection
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 14 |
| 01***55 | Bolt, Mount Tube To Switch Pump | 6 |
| 01***60 | Bolt, Mount Tube To Switch Pump | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Alternator (25a) (With Vacuum Pump)
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Alternator (25a) (Without Vacuum Pump) (Except Japan)(#.-)
| 60***50 | Alternator A. (25a),(With Non Hardening Pulley) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***70 | Bracket,Front | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Alternator (25a) (Without Vauccm Pump) (Except Japan)(#10001-.)
| 60***90 | Alternator A. (25a),(See Fig.0641a) | 1 |
| KD***52 | Bolt,Through | 3 |
| KD***70 | Rear Bracket Ass'Y | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Alternator And Mounting (With Vacuum Pump)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***25 | Bolt | 1 |
| 01***11 | Nut (Welded) | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Alternator And Mounting (Without Vacuum Pump)
| 01***75 | Bolt,(For Adjusting) | 1 |
| 01***30 | Bolt | 1 |
| 01***11 | Nut (Welded) | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Camshaft
| 01***22 | Bolt | 2 |
| 04***25 | Key, Plain Woodruff | 1 |
| 04***12 | Ring,Snap (For Ripper) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Cooling Fan And Mounting
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 22 |
| 01***40 | Bolt, Mount Master Brake Cylinder | 2 |
| 01***50 | Bolt,(With Service Valve R.H.) | 6 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Corrosion Resistor And Piping
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 1 |
| 02***25 | Bolt,(Cold Weather Spec.) | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Crankshaft
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 6 |
| 01***30 | Screw | 1 |
| 01***35 | Screw | 5 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Cylinder Block Cover
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***00 | Bolt, Mount Back-Up Alarm | 2 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Cylinder Block(#10001-10099)
| 01***12 | Bolt,(Without Air Compressor Type) | 2 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 14 |
| 04***14 | Pin, Dowel | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Cylinder Block(#10100-)
| 01***12 | Bolt,(Without Air Compressor Type) | 2 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 14 |
| 04***14 | Pin, Dowel | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Cylinder Head(#10001-26915)
| 04***20 | Pin,Dowel (Welded) | 2 |
| 61***30 | Sleeve,Holder | 1 |
| 61***20 | Cotter, Valve | 8 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Cylinder Head(#26916-)
| 04***20 | Pin,Dowel (Welded) | 2 |
| 61***30 | Sleeve,Holder | 1 |
| 61***20 | Cotter, Valve | 8 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Engine Support
| 61***20 | Support,Front | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Exhaust Manifold
| 01***80 | Bolt, Mount Strainer Flange | 18 |
| 01***00 | Bolt (M10-1.50x100) | 18 |
| 07***08 | Plug,(Without Auto Priming System) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Flywheel And Flywheel Housing
| 01***40 | Bolt,(Dust And Dirt Protection) | 2 |
| 01***50 | Bolt, Radiator To Frame | 6 |
| 01***70 | Bolt - Thrust Plate Mounting | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Front Cover
| 01***25 | Bolt,(Without Auto Priming System) | 6 |
| 01***60 | Screw | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Fuel Filter And Piping
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 2 |
| 01***16 | Washer,Radio Controlled Slag Handling | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Fuel Injection Pump (Copuling) (155hp Spec.)(#10001-15426)
| ND***50 | Bolt | 1 |
| ND***70 | Bolt | 2 |
| ND***60 | Bolt | 6 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Fuel Injection Pump (Copuling)(#10001-19030)
| ND***50 | Bolt | 1 |
| ND***70 | Bolt | 2 |
| ND***60 | Bolt | 6 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Fuel Injection Pump (Feed Pump) (155hp Spec.)
| ND***40 | Washer? 1mm,Plate | 1 |
| ND***00 | Pump Ass'Y,Priming Pump | 1 |
| ND***50 | Rod? 5.000mm,Push (Green) | 0 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Fuel Injection Pump (Feed Pump)(#10001-19030)
| ND***40 | Washer? 1mm,Plate | 1 |
| ND***70 | Feed Pump Ass'Y | 1 |
| ND***00 | Pump Ass'Y,Priming Pump | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Fuel Injection Pump (Governor) (155hp Spec.)
| ND***30 | Capsule,Full Stop | 1 |
| ND***70 | Arm,Spring | 1 |
| ND***40 | Plug,Screw | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Fuel Injection Pump (Governor)(#10001-19030)
| ND***40 | Plug,Screw | 1 |
| ND***20 | Washer? 1.0mm,Cover Plate | 2 |
| ND***60 | O-Ring | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Fuel Injection Pump (Pump) (155hp Spec.)
| 61***30 | Injection Pump A | 1 |
| ND***50 | Ring,Adjust | 1 |
| ND***80 | O-Ring | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Fuel Injection Pump (Pump)(#10001-19030)
| 61***11 | Injection Pump A.,(For Gd605a?R) (See Fig.472) | 1 |
| 61***12 | Injection Pump A.,(For Gd605a?R) (See Fig.472) | 1 |
| ND***50 | Ring,Adjust | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Fuel Injection Pump And Piping
| 01***75 | Bolt,(See Fig.0142) | 4 |
| 01***30 | Bolt | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Gasket Kit
| 01***23 | Washer,Lock (K5) | 1 |
| 02***43 | O-Ring,Water Manifold | 10 |
| 07***10 | O-Ring,(F4350-62a0 -5 ), O-Ring; Komatsu S/N 22***01 & Abv - Was 07000-02010, O-Ring; Was 07000-02010 | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Heater Switch And Heater Signal
| 08***19 | Cap, At Heater Relay Terminals | 2 |
| 08***35 | Indicator,Dust (Japanese-English) | 1 |
| 60***70 | Switch,Air Intake Heater | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Lubricating Oil Cooler
| 01***25 | Bolt,Without Revolution Sensor | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 13 |
| 01***65 | Bolt,(Except Japan) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Lubricating Oil Filter
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***16 | Washer,Radio Controlled Slag Handling | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Lubricating Oil Piping
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***50 | Bolt,(With Service Valve R.H.) | 2 |
| 01***16 | Washer,Radio Controlled Slag Handling | 7 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Lubricating Oil Pump And Suction Pipe
| 01***25 | Bolt,(Without Auto Priming System) | 4 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 2 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 5 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Main Clutch Cooler
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***40 | Bolt, Mount Master Brake Cylinder | 3 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Muffler
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 4 |
| 01***30 | Bolt, Mount Pump | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Nozzle Holder
| 01***45 | Bolt, Divider Valve Mounting | 12 |
| 07***65 | O-Ring,Cylinder Block | 6 |
| 07***12 | Gasket,Mechanical Pump Piping | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Oil Pan
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 31 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 7 |
| 01***16 | Washer,Radio Controlled Slag Handling | 37 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : P.T.O. Lubricating Oil Piping
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***40 | Bolt,(With Service Valve R.H.) | 1 |
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 23 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Piston And Connecting Rod
| 02***13 | Pin, Dowel | 2 |
| 04***18 | Ring, Snap | 2 |
| 61***10 | Piston Ass'Y | 6 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Power Take Off (1/2)
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 6 |
| 01***40 | Bolt,(With Service Valve R.H.) | 6 |
| 01***45 | Bolt | 6 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Power Take Off (2/2)
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 6 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Rocker Arm And Housing
| 01***08 | Nut,R.H. Thread | 12 |
| 01***16 | Washer,Radio Controlled Slag Handling | 40 |
| 01***32 | Washer,(With Auto Emergency Steering) | 40 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Rocker Arm Housing Cover
| 01***16 | Washer,Radio Controlled Slag Handling | 24 |
| 61***10 | Cover,Head? No.2?3?4?5?6 | 6 |
| 61***11 | Cover,Head? No.2?3?4?5?6 | 6 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Starting Motor (7.5kw)(#10001-18199)
| 60***30 | Starting Motor Ass'Y,(7.5kw)(See Fig.0661) | 1 |
| KD***20 | Magnetic Switch Assembly | 1 |
| KD***40 | Spring,Spring | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Starting Motor (7.5kw)(#18200-)
| 60***30 | Starting Motor Ass'Y,(7.5kw) | 1 |
| KD***60 | Shift Lever Assembly | 1 |
| KD***40 | Spring,Spring | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Starting Motor And Mounting
| 01***40 | Bolt,(With Center Guard) | 3 |
| 60***30 | Starting Motor Ass'Y,(7.5kw)(See Fig.0661) | 1 |
| 66***10 | Gasket,Starting Motor | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Turbocharger (For Turbocharger Engine)
| 61***00 | Turbocharger Ass'Y,(Tv7705) | 1 |
| GA***85 | V-Band Ass'Y | 1 |
| GA***07 | Rotor Ass'Y | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Water Manifold
| 02***43 | O-Ring,Water Manifold | 10 |
| 07***12 | Washer, Gasket,(Without Thermo Sensor) (K1) | 1 |
| 07***12 | Plug,(Without Corrosion Resistor) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Water Pump
| 01***16 | Bolt (With Air Heater & Conditioner) | 6 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***40 | Bolt, Mount Master Brake Cylinder | 3 |
Komatsu : Gd605a-3(S/N 54001-Up) : 6d125-1q Engine S/N 10001-Up : Water Separator
| 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 |
Engine Related Parts And Electrical System
Komatsu : Gd605a-3(S/N 54001-Up) : Engine Related Parts And Electrical System : Battery
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***18 | Bolt | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Engine Related Parts And Electrical System : Electrical System (1/4)
| 01***16 | Bolt (With Air Heater & Conditioner) | 14 |
| 01***25 | Bolt,Without Revolution Sensor | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 3 |
Komatsu : Gd605a-3(S/N 54001-Up) : Engine Related Parts And Electrical System : Electrical System (2/4)
| 01***40 | Bolt,(With Air Conditioner) | 1 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***10 | Nut (K10) | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Engine Related Parts And Electrical System : Electrical System (3/4)
| 01***20 | Bolt,(With Auto Emergency Steering) | 7 |
| 01***25 | Bolt,Without Revolution Sensor | 1 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Engine Related Parts And Electrical System : Electrical System (4/4)
| 23***10 | Cable,(60b) | 1 |
| 23***10 | Harness | 1 |
| 23***61 | Harness | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Engine Related Parts And Electrical System : Engine Mouting Parts
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***55 | Bolt,(For Reinforced Type) | 4 |
| 01***55 | Bolt | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Engine Related Parts And Electrical System : Fuel Tank And Fuel Piping
| 01***10 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 3 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Engine Related Parts And Electrical System : Instrument Panel (1/2)(#54001-54112)
| 01***20 | Screw (Not Illustrated) | 1 |
| 01***12 | Screw,(With Articulate Indicator) | 8 |
| 01***23 | Washer,(With Auto Emergency Steering) | 8 |
Komatsu : Gd605a-3(S/N 54001-Up) : Engine Related Parts And Electrical System : Instrument Panel (1/2)(#54113-)
| 01***20 | Screw (Not Illustrated) | 1 |
| 01***16 | Screw,(P.O.C. Model) (Except Japan) | 4 |
| 01***23 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : Engine Related Parts And Electrical System : Instrument Panel (2/2)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 2 |
| 01***20 | Bolt,(Without Maintenance Monitor) | 6 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 5 |
Komatsu : Gd605a-3(S/N 54001-Up) : Engine Related Parts And Electrical System : Radiator
| 01***12 | Bolt,(With Cylinder Cover) | 8 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 5 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 8 |
Komatsu : Gd605a-3(S/N 54001-Up) : Engine Related Parts And Electrical System : Throttle Lever Linkage
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***40 | Bolt | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Engine Related Parts And Electrical System : Throttle Pedal Linkage(#54001-54003)
| 01***12 | Bolt,(With Cylinder Cover) | 2 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***30 | Bolt,(For Mechanical Governor) | 3 |
Komatsu : Gd605a-3(S/N 54001-Up) : Engine Related Parts And Electrical System : Throttle Pedal Linkage(#54004-)
| 01***30 | Bolt | 1 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***25 | Bolt,Without Revolution Sensor | 1 |
Frame And Guard
Komatsu : Gd605a-3(S/N 54001-Up) : Frame And Guard : Air Cleaner Mounting And Shovel Hanger
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Frame And Guard : Auxiliary Seat
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***16 | Bolt (Op) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : Frame And Guard : Engine Hood
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 16 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 15 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 7 |
Komatsu : Gd605a-3(S/N 54001-Up) : Frame And Guard : Frame
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : Frame And Guard : Front Fender
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 6 |
| 01***11 | Nut,(With Under Mirror) | 32 |
Komatsu : Gd605a-3(S/N 54001-Up) : Frame And Guard : Marks And Plates
| 01***60 | Screw | 4 |
| 01***10 | Washer,Spring (For Engine Room Lamp) | 4 |
| 09***00 | Plate? Caution,Recommended Fuel Oil | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Frame And Guard : Operator'S Compartment (1/2)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : Frame And Guard : Operator'S Compartment (2/2)
| 01***10 | Bolt, Mount Flasher | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 14 |
Komatsu : Gd605a-3(S/N 54001-Up) : Frame And Guard : Operator'S Seat
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 7 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : Frame And Guard : Pusher (Op)
| 01***00 | Screw | 6 |
| 01***19 | Nut - M24 | 6 |
| 01***60 | Washer,(Without Rops Guard? Canopy) | 12 |
Komatsu : Gd605a-3(S/N 54001-Up) : Frame And Guard : Rear Fender
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 3 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 12 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 10 |
Komatsu : Gd605a-3(S/N 54001-Up) : Frame And Guard : Side Panel
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 28 |
| 01***20 | Screw - Turn Signal And Parkinglight Mounting | 16 |
| 01***12 | Screw (Op) | 16 |
Komatsu : Gd605a-3(S/N 54001-Up) : Frame And Guard : Transmission Under Guard (Op)
| 01***50 | Bolt,(For Tree Pusher) | 6 |
| 01***60 | Flat Washer - M20 (Hardened) | 6 |
| 23***40 | Guard | 1 |
Hydraulic System
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Articulate Cylinder
| 07***95 | O-Ring,(Y1620-11a0a-12) | 1 |
| 07***95 | Ring,Back-Up? Cylinder Head | 1 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Articulate Piping
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Blade Lift Cylinder
| 01***75 | Bolt,(Reinforced Type) | 2 |
| 01***16 | Nut - M20 | 2 |
| 01***60 | Washer,(For Large Size Tire) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Blade Lift Piping
| 01***65 | Bolt,R.H | 6 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***50 | Bolt,(With Service Valve R.H.) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Blade Side Shift Cylinder
| 07***85 | O-Ring,(For Snow Removing) | 1 |
| 07***85 | Ring,Back-Up? Head | 1 |
| 07***45 | Seal,Dust? Cylinder | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Blade Side Shift Piping
| 01***12 | Bolt,(With Cylinder Cover) | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Circle Revolution Piping
| 01***16 | Bolt (With Air Heater & Conditioner) | 1 |
| 01***65 | Bolt,R.H | 1 |
| 01***75 | Bolt,(For Shipping) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Console Box (1/2)(#54001-54112)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 6 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Console Box (1/2)(#54113-)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Console Box (2/2)(#54001-54112)
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***12 | Screw,(Additional Sun Visor) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Console Box (2/2)(#54113-)
| 01***16 | Bolt (With Air Heater & Conditioner) | 1 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 2 |
| 01***25 | Bolt | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Directional Control
| 07***34 | O-Ring,(For Front Attachment) | 2 |
| 23***10 | Body | 1 |
| 23***20 | Plug | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Drawbar Shift Cylinder
| 01***75 | Bolt,(For Adjusting) | 4 |
| 01***16 | Nut - M20 | 4 |
| 01***60 | Washer,(For Large Size Tire) | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Drawbar Side Shift Piping
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***50 | Bolt,(With Service Valve R.H.) | 1 |
| 01***90 | Bolt, Fan Mounting | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Hydraulic Control Lever (1/2)(#54001-54112)
| 01***05 | Nut,L.H. Thread (D31s) | 7 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 8 |
| 01***05 | Nut,L.H. Thread | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Hydraulic Control Lever (1/2)(#54113-)
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Hydraulic Control Lever (2/2)(#54001-54112)
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 8 |
| 01***05 | Nut,L.H. Thread | 7 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Hydraulic Control Lever (2/2)(#54113-)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***06 | Nut? L.H. Thread,L.H. Thread | 3 |
| 01***05 | Nut,L.H. Thread (D31s) | 3 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Hydraulic Control Valve? L.H. (5-Spool)
| 01***16 | Bolt (Op) | 20 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 4 |
| 07***11 | O-Ring (Kit) | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Hydraulic Control Valve? R.H. (3-Spool)
| 01***16 | Bolt,(Without Cab) | 12 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 4 |
| 07***10 | O-Ring,(F4350-62a0 -5 ), O-Ring; Komatsu S/N 22***01 & Abv - Was 07000-02010, O-Ring; Was 07000-02010 | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Hydraulic Motor
| 23***00 | Motor Ass'Y | 1 |
| 23***10 | Seal,Dust (K12) | 1 |
| 23***20 | Housing | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Hydraulic Pump
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 8 |
| 04***15 | Ring, Snap | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Hydraulic Tank
| 01***30 | Bolt,Radio Controlled Slag Handling | 4 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***40 | Bolt,(With Service Valve R.H.) | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Leaning Cylinder
| 07***85 | O-Ring,(For Snow Removing) | 1 |
| 07***85 | Ring,Back-Up? Head | 1 |
| 07***45 | Seal,Dust? Cylinder | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Leaning Piping
| 01***20 | Bolt,(With Auto Emergency Steering) | 1 |
| 01***25 | Bolt, Mount Filter To Bracket | 1 |
| 01***09 | Nut,(With Body Positioner) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Low Pressure Piping (1/3)
| 01***16 | Bolt (With Air Heater & Conditioner) | 7 |
| 01***30 | Bolt,(For Mechanical Governor) | 4 |
| 01***80 | Bolt,(For Long Lever Control) | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Low Pressure Piping (2/3)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 2 |
| 01***11 | Nut,(With Under Mirror) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Low Pressure Piping (3/3)
| 01***16 | Bolt (With Air Heater & Conditioner) | 1 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Pilot Check Valve (For Articulate)
| 07***20 | O-Ring,(0202-007) | 2 |
| 07***20 | Ring, Back-Up | 2 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Pilot Check Valve (For Blade Lift L.H. And Scarifier)
| 01***12 | Nut | 1 |
| 07***12 | O-Ring, Divider Valve Mounting | 2 |
| 07***21 | O-Ring (Kit) | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Pilot Check Valve (For Blade Lift R.H.)
| 07***21 | O-Ring (Kit) | 1 |
| 07***22 | O-Ring,(F5350-63a0 -26 ) | 1 |
| 07***21 | Ring, Back-Up | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Pilot Check Valve (For Drawbar Shift)
| 07***20 | O-Ring,(0202-007) | 2 |
| 07***20 | Ring, Back-Up | 2 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Pilot Check Valve (For Leaning)
| 07***20 | O-Ring,(0202-007) | 2 |
| 07***20 | Ring, Back-Up | 2 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Scarifier Cylinder
| 07***85 | O-Ring,(For Snow Removing) | 1 |
| 07***85 | Ring,Back-Up? Head | 1 |
| 07***05 | Bushing (Op) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Hydraulic System : Scarifier Piping
| 07***34 | O-Ring,(For Without Brake Assistor) | 8 |
| 07***08 | Plug,(Without Auto Priming System) | 2 |
| 07***05 | Hose (Op) | 1 |
Optional Parts
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Accumulator
| 01***10 | Bolt,For Additional Rear Lamp | 2 |
| 08***14 | Band,(For Additional Fuel Strainer) | 20 |
| 08***02 | Lamp,Articulate Indicator | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Angling Snow Plow (1/2)
| 01***16 | Bolt (With Air Heater & Conditioner) | 1 |
| 01***35 | Bolt,(For Position Fixing) | 1 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Angling Snow Plow (2/2)
| 01***30 | Bolt,(Not Used With Emergency Str.) | 24 |
| 01***55 | Bolt,(Without Rops Guard? Canopy) | 6 |
| 01***80 | Bolt,(With Scarifier) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Angling Snow Plow Cylinder (For Angling)
| 04***25 | Ring, Snap | 1 |
| 07***95 | O-Ring,(Y1620-11a0a-12) | 1 |
| 07***95 | Ring,Back-Up? Cylinder Head | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Angling Snow Plow Piping (1/2)
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***65 | Bolt,R.H | 3 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Angling Snow Plow Piping (2/2)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Blade Accumulator Piping
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 8 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Car Heater Mounting
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 2 |
| 07***89 | Clamp,(For Japan) | 12 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Car Heater Piping
| 01***16 | Bolt (With Air Heater & Conditioner) | 20 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***12 | Bolt | 5 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Front Blade
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 20 |
| 01***55 | Bolt,(Without Rops Guard? Canopy) | 6 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Front Blade Control Lever
| 01***05 | Nut,L.H. Thread (D31s) | 2 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Front Blade Cylinder
| 07***95 | O-Ring,(Y1620-11a0a-12) | 1 |
| 07***95 | Ring,Back-Up? Cylinder Head | 1 |
| 07***07 | Seal | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Front Blade Piping
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***60 | Bolt,(For Japan And Sweden) | 3 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Hydraulic Control Lever (For Angling Snow Plow)
| 01***05 | Nut,L.H. Thread (D31s) | 4 |
| 01***05 | Nut | 1 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Hydraulic Control Lever (For V-Type Snow Plow)
| 01***05 | Nut,L.H. Thread (D31s) | 2 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Hydraulic Control Valve (5-Spool)
| 01***16 | Bolt (Op) | 20 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 4 |
| 07***11 | O-Ring (Kit) | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Hydraulic Control Valve? R.H. (4-Spool)
| 01***16 | Bolt | 16 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 4 |
| 07***10 | O-Ring,(F4350-62a0 -5 ), O-Ring; Komatsu S/N 22***01 & Abv - Was 07000-02010, O-Ring; Was 07000-02010 | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Lift Cylinder (For Angling Snow Plow And V-Type Snow Plow)
| 07***95 | O-Ring,(Y1620-11a0a-12) | 1 |
| 07***95 | Ring,Back-Up? Cylinder Head | 1 |
| 07***07 | Seal (Kit) | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Operator'S Cab (1/5)
| 01***30 | Bolt,(Not Used With Emergency Str.) | 12 |
| 01***60 | Bolt, Tube To Oil Cooler | 10 |
| 01***10 | Screw,(For Lighter) | 3 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Operator'S Cab (2/5)
| 01***14 | Screw,R.H | 77 |
| 01***05 | Washer,(Without Window Washer) | 77 |
| 23***13 | Cab Ass'Y | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Operator'S Cab (3/5)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***16 | Screw (Op) | 28 |
| 01***11 | Nut,(Not Shown) | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Operator'S Cab (4/5)
| 01***20 | Bolt,(Without Maintenance Monitor) | 4 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 20 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 12 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Operator'S Cab (5/5)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 2 |
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 14 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 3 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Pilot Check Valve (For Angling Snow Plow And V-Type Snow Plow)
| 07***21 | O-Ring (Kit) | 1 |
| 07***22 | O-Ring,(F5350-63a0 -26 ) | 1 |
| 07***21 | Ring, Back-Up | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Pilot Check Valve (For Front Blade)
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Pilot Check Valve (For Ripper)
| 01***12 | Nut | 1 |
| 07***12 | O-Ring, Divider Valve Mounting | 2 |
| 07***21 | O-Ring (Kit) | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Power Tilt Blade Piping
| 01***25 | Bolt,Without Revolution Sensor | 2 |
| 01***60 | Bolt,(For Japan And Sweden) | 3 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Power Tilt Control Lever
| 01***05 | Nut,L.H. Thread (D31s) | 2 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Power Tilt Cylinder
| 04***30 | Seal, Dust | 1 |
| 07***00 | O-Ring,(F4350-65a1 -5 ) | 1 |
| 07***95 | O-Ring,(Y1620-11a0a-12) | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Ripper Cylinder
| 04***25 | Ring, Snap | 1 |
| 04***25 | Ring | 1 |
| 07***25 | O-Ring,Cylinder Head | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Ripper Piping
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***75 | Bolt,(For Shipping) | 3 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Ripper Shank Beam And Link
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***85 | Bolt,(For Perforated Mask) | 4 |
| 01***60 | Bolt | 10 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Shock Evasion Blade (1/2)
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
| 01***50 | Bolt,(For Tbg/Abe Spec.) | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Shock Evasion Blade (2/2)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***80 | Bolt, Mount Tubes To Switch And Work Pumps | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Support (For Power Tilt Blade)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 6 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : V-Type Snow Plow (1/2)
| 01***16 | Bolt (With Air Heater & Conditioner) | 1 |
| 01***35 | Bolt,(For Position Fixing) | 1 |
| 01***65 | Bolt,(Except Japan) | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : V-Type Snow Plow (2/2)
| 01***30 | Bolt,(Not Used With Emergency Str.) | 24 |
| 01***55 | Bolt,(Without Rops Guard? Canopy) | 6 |
| 01***80 | Bolt,(With Scarifier) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : V-Type Snow Plow Piping (With Scarifier)
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***65 | Bolt,R.H | 3 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : V-Type Snow Plow Piping (Without Scarifier)
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***65 | Bolt,R.H | 3 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Optional Parts : Vehicle Inspection Parts (For V-Type Snow Plow)
| 01***12 | Bolt,(With Cylinder Cover) | 6 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***25 | Bolt,Without Revolution Sensor | 2 |
Power Train
Komatsu : Gd605a-3(S/N 54001-Up) : Power Train : Damper
| 01***20 | Bolt,(Without Maintenance Monitor) | 36 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***30 | Bolt | 12 |
Komatsu : Gd605a-3(S/N 54001-Up) : Power Train : Inching Control
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Power Train : Transfer
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 10 |
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 2 |
| 01***40 | Bolt,R.H. Outside And L.H. Inside, Bolt | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : Power Train : Transmission 1st Gear
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 6 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 7 |
| 01***50 | Bolt,(With Service Valve R.H.) | 7 |
Komatsu : Gd605a-3(S/N 54001-Up) : Power Train : Transmission Case
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 2 |
| 01***45 | Bolt, Mount Center Hinge Retainer (Upper) | 12 |
Komatsu : Gd605a-3(S/N 54001-Up) : Power Train : Transmission Control (1/2)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 8 |
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 1 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 3 |
Komatsu : Gd605a-3(S/N 54001-Up) : Power Train : Transmission Control (2/2)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 2 |
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Power Train : Transmission Control Valve
| 01***30 | Bolt,(For Mechanical Governor) | 10 |
| 01***45 | Screw | 4 |
| 01***50 | Bolt (Kit) | 9 |
Komatsu : Gd605a-3(S/N 54001-Up) : Power Train : Transmission Cover
| 01***50 | Bolt (Kit) | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 12 |
Komatsu : Gd605a-3(S/N 54001-Up) : Power Train : Transmission Filter
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***70 | Bolt, Accumulator Mounting Bracket | 4 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 3 |
Komatsu : Gd605a-3(S/N 54001-Up) : Power Train : Transmission Forward? 2nd And 3rd Gear
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 8 |
| 04***25 | Ring, Retaining | 1 |
| 04***25 | Ring, Snap | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Power Train : Transmission Output Shaft (1/2)
| 01***30 | Bolt | 4 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 6 |
| 01***80 | Bolt,(For Adjustable Rod) | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Power Train : Transmission Output Shaft (2/2)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 14 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : Power Train : Transmission Piping (Inlet)
| 01***55 | Bolt,(10m) | 4 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Power Train : Transmission Piping (Outlet)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***55 | Bolt, Mount Tube To Switch Pump | 4 |
| 01***60 | Bolt, Mount Tube To Switch Pump | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Power Train : Transmission Pump
| 04***18 | Ring, Retaining | 1 |
| 70***11 | Pump Ass'Y,(Sal(2)45) | 1 |
| 70***10 | Seal, Oil | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Power Train : Transmission Reverse Gear
| 04***23 | Pin | 4 |
| 04***18 | Ring,Snap (Without R.P.C.U.) | 3 |
| 04***10 | Ring, Snap | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Power Train : Transmission Support
| 01***40 | Bolt,(With Service Valve R.H.) | 12 |
| 01***55 | Bolt,(For Reinforced Type) | 4 |
| 01***00 | Bolt - Cover Mounting | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Power Train : Transmission Transfer Gear
| 01***55 | Bolt, Mount Tube To Switch Pump | 2 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 20 |
| 01***40 | Bolt,R.H. Outside And L.H. Inside, Bolt | 6 |
Steering System
Komatsu : Gd605a-3(S/N 54001-Up) : Steering System : Double Relief Valve
| 07***12 | O-Ring, Divider Valve Mounting | 1 |
| 07***16 | O-Ring,Suction And Relief Valve | 1 |
| 07***12 | Ring,Back-Up; Was 07001-02012, Ring,Back-Up (Itl) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Steering System : Flow Control Valve
| 23***00 | Valve Ass'Y,Flow Control | 1 |
| 23***10 | Body | 1 |
| 23***20 | Spool | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Steering System : Front Axle (1/2)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***10 | Nut | 1 |
| 01***27 | Nut | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Steering System : Front Axle (2/2)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 6 |
| 01***13 | Nut | 2 |
| 01***16 | Nut | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Steering System : Pitman Arm
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Steering System : Steering Cylinder
| 07***65 | O-Ring,(F5350-62a0 -14 ) | 1 |
| 07***65 | Ring,Back-Up (Kit) | 1 |
| 07***08 | Plug,(For W/O. Corrosion Resistor) | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Steering System : Steering Piping (1/2)
| 01***16 | Bolt (With Air Heater & Conditioner) | 1 |
| 01***55 | Bolt,(10m) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Steering System : Steering Piping (2/2)
| 01***60 | Bolt | 2 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***30 | Bolt,(For Mechanical Governor) | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : Steering System : Steering Pump
| 04***15 | Ring, Snap | 1 |
| 70***10 | Seal, Oil | 1 |
| 70***10 | Pump Ass'Y,Work Equipment | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Steering System : Steering Wheel
| 01***11 | Nut - Mounting | 1 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 4 |
| 01***42 | Washer,Spring (For Pedal Steering), Washer-Spring | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Steering System : Tie Rod
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 4 |
| 01***60 | Bolt, Tube To Oil Cooler | 2 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 4 |
Tandem Drive And Wheels
Komatsu : Gd605a-3(S/N 54001-Up) : Tandem Drive And Wheels : Air Dryer (Op)
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 8 |
| 23***00 | Dryer (Op) | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Tandem Drive And Wheels : Air Governer
| 23***10 | Governor Ass'Y,Air (Op) | 1 |
| 38***-1 | Screw,Adjusting | 1 |
| 38***-1 | Seat,Spring | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Tandem Drive And Wheels : Brake Piping (1/2)
| 01***70 | Bolt (Op) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Tandem Drive And Wheels : Brake Piping (2/2)
| 01***16 | Bolt (With Air Heater & Conditioner) | 24 |
| 01***25 | Bolt,Without Revolution Sensor | 4 |
| 01***35 | Bolt,(For Position Fixing) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Tandem Drive And Wheels : Brake Valve
| 01***25 | Bolt,(For Automatic) | 4 |
| 01***22 | Bolt,(10m) | 3 |
| 01***10 | Screw,(For Wiper Switch Earth) | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : Tandem Drive And Wheels : Final Drive Bevel Gear
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 6 |
| 01***45 | Bolt, Mounting Bracket To Radiator (Top) | 6 |
Komatsu : Gd605a-3(S/N 54001-Up) : Tandem Drive And Wheels : Final Drive Case
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***50 | Bolt,(With Service Valve R.H.) | 2 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Tandem Drive And Wheels : Parking Brake
| 01***30 | Bolt-Hex, Bolt,(With Center Guard) | 6 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 1 |
| 01***42 | Washer,Spring (For Pedal Steering), Washer-Spring | 6 |
Komatsu : Gd605a-3(S/N 54001-Up) : Tandem Drive And Wheels : Parking Brake Control
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 6 |
Komatsu : Gd605a-3(S/N 54001-Up) : Tandem Drive And Wheels : Propeller Shaft
| 01***60 | Bolt,For Weight Adjusting Bolt | 8 |
| 01***36 | Wahser-Spring, Washer,Spring (Without Towing Winch) | 8 |
| 23***00 | Drive Shaft Ass'Y | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Tandem Drive And Wheels : Relay Valve
| 56***30 | O-Ring | 1 |
| 56***60 | Valve (Kit) | 1 |
| 56***70 | Ring,Retaining (Kit) | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Tandem Drive And Wheels : Tandem Drive Case
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 12 |
| 01***36 | Wahser-Spring, Washer,Spring (Without Towing Winch) | 16 |
Komatsu : Gd605a-3(S/N 54001-Up) : Tandem Drive And Wheels : Tandem Drive Case And Disk Brake
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***25 | Bolt,(For Rubber Shoe) | 8 |
| 01***35 | Bolt, Hydraulic Tank Mounting | 4 |
Komatsu : Gd605a-3(S/N 54001-Up) : Tandem Drive And Wheels : Wheel
| 23***40 | Wheel Ass'Y,L.H | 3 |
| 23***50 | Wheel Ass'Y,L.H | 3 |
| 23***60 | Wheel Ass'Y,R.H | 3 |
Tool And Kit
Komatsu : Gd605a-3(S/N 54001-Up) : Tool And Kit : Kit
| 07***08 | O-Ring,Hydraulic Filter | 1 |
| 07***14 | O-Ring,(F4350-61a0a-20 ) | 1 |
| 07***15 | O-Ring,Regulator Valve | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Tool And Kit : Tool
| 01***65 | Bolt, Mount Cam | 1 |
| 07***70 | Tube,Vinyl | 1 |
| 07***00 | Pump,Grease | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Tool And Kit : Tool Box
| 01***20 | Bolt,(With Auto Emergency Steering) | 12 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 12 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 12 |
Work Equipment
Komatsu : Gd605a-3(S/N 54001-Up) : Work Equipment : Bank Cutting Control
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
Komatsu : Gd605a-3(S/N 54001-Up) : Work Equipment : Blade And Circle Reverse Support
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 1 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 5 |
Komatsu : Gd605a-3(S/N 54001-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 : Gd605a-3(S/N 54001-Up) : Work Equipment : Circle Reverse Gear (1/2)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 12 |
| 01***40 | Bolt,(With Service Valve R.H.) | 8 |
| 01***55 | Bolt,(Without Rops Guard? Canopy) | 4 |
Komatsu : Gd605a-3(S/N 54001-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 : Gd605a-3(S/N 54001-Up) : Work Equipment : Drawbar
| 01***20 | Capscrew | 2 |
| 01***35 | Bolt | 14 |
| 01***50 | Capscrew - M20 X 2.50 | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Work Equipment : Scarifier
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***65 | Bolt,(With Canvas Or Rops Canopy) | 12 |
| 01***80 | Bolt,(For Adjustable Rod) | 2 |
Komatsu : Gd605a-3(S/N 54001-Up) : Work Equipment : Scarifier Lifter
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***10 | Bolt (Op) | 4 |
| 01***05 | Bolt (Op) | 2 |
GD605A-3(S/N 54001-UP) serial number reference
On this Komatsu grader the PIN/serial plate is mounted on the front frame, with the same number often stamped into the frame itself near the plate. Exact left/right plate placement is not consistently documented; verify the physical location with your dealer or the operation manual for your unit. There is no letter prefix to decode on this model: read the plate as the model code (GD605A-3) followed by the plain numeric serial, and match that number against the manual's stated range (54001-UP for this family, versus 57001-UP for the separate U.S. chassis-only version) to confirm which parts/service book and running changes apply.
| Prefix | Identifies | Notes |
|---|---|---|
| 54001-UP | Base/JPN-spec chassis, GD605A-3 | Starting serial for this GD605A-3 parts, service, and operation manual family. Factory literature for this range is titled GD605A-3(JPN) and covers roughly 54001 through 57000, after which the block hands off to a separate U.S.-market chassis-only variant (S/N 57001-UP) documented under its own manual set. Engine fitted is from the 6D125 series (documented in parts cross-reference listings alongside the GD605A-3 chassis); exact factory suffix varies by point in the production run, confirm with your dealer using the full engine serial. No alphabetic PIN prefix scheme applies to this model; Komatsu identifies this grader by model code plus a straight numeric serial block rather than a letter prefix, consistent with other Komatsu grader lines of this era. |
| 57001-UP | GD605A-3US chassis-only, U.S.A. market | Separate manual set and separate parts-catalog listing for the U.S.A./chassis-only version, picking up where the 54001-UP JPN block ends. Excluded from this record's data beyond noting the boundary; treat as a distinct machine identity, not a sub-range of the 54001-UP family. |
Frequently asked questions
What engine powers the Komatsu GD605A-3 (S/N 54001-UP)?
A Komatsu 6D125-1Q inline-six diesel. It is mechanically governed with an inline fuel-injection pump and has no electronic control module, so diagnostics rely on the caution-lamp monitor panel rather than stored fault codes.
What is the operating weight of the GD605A-3 (S/N 54001-UP)?
Approximately 14,970 kg (33,000 lb) in standard configuration. Actual weight varies with blade, scarifier and cab or canopy fitment.
What replaced the Komatsu GD605A-3 in the model lineup?
Komatsu continued the 605A designation domestically through later Japan-market updates, while the export platform was eventually renumbered into the GD655 and GD675 series as those graders gained electronic and dual-mode transmissions. There is no single documented one-for-one successor tied specifically to the 54001-UP block.
What GD605A-3(S/N 54001-UP) owners discuss
What is the biggest engine quirk to expect from the 6D125-1Q in this grader?
The mechanical (non-electronic) fuel injection pump and injectors on the 6D125-1Q drift out of calibration with hours and heat rather than throwing a fault code, so rough running, hard starting, or smoke is usually the first sign, not a warning lamp. Owners of 6D125-family engines report that a sticking pump plunger traces back to fuel quality (dirt or water in the tank) more often than a worn pump. Keep fuel filters and water separators serviced on schedule and do not let the tank run low; low fuel invites condensation. If compression loss or smoke complaints show up within months of a rebuild, check air filtration and piston cooling oilers before blaming the rebuild itself; a plugged oiler can take a cylinder out fast. Have your dealer verify injection timing and compression with proper test equipment before committing to injector or pump replacement.
What causes the circle to bind or the moldboard to lose position under load?
Difficulty turning the circle, uneven rotation, grinding or clunking noise, and a moldboard that will not hold position under load are the classic complaints on graders this size. The usual suspects, roughly in order of likelihood: circle-to-drawbar clearance that has been left to hammer instead of staying adjusted, worn or leaking circle-turn cylinder seals, a clogged or sticking control valve, and worn circle wear plates or drive components. Contaminated or low hydraulic fluid makes all of the above worse. Check drawbar-to-circle clearance and wear-plate condition first; it is the cheapest fix and the most common root cause reported. If the circle still binds after adjustment, move to the cylinders and control valve next. Have your dealer verify hydraulic pressures against spec before replacing a control valve.
Where does wear actually show up first on a grader this size, since there is no undercarriage?
This class of grader does not run a track undercarriage, so the wear items to watch are the moldboard's replaceable wear inserts and cutting edge/end bits, the circle wear plates and drive components, and the articulation and drawbar pin/bushing joints. Play in the articulation joint or the drawbar ball-and-socket shows up first as corner-to-corner blade chatter or the machine wandering slightly under load, well before it is visible with the machine parked and still. Keeping the circle, drawbar, and articulation grease points on schedule is the single factor operators credit most for extending joint life; skipped grease intervals are the most commonly cited cause of premature pin and bushing wear on graders this size.
Why do the final drives or wheel motors start weeping oil, and how serious is it?
Final drive or wheel-motor oil weeping at the output seal is a recurring complaint on Komatsu wheel-drive machines of this size, and it is usually a duo-cone (face) seal issue rather than a bad gasket. A clogged case-drain filter is a common root cause; it raises case pressure and pushes the seal past its limit, so check that before condemning the seal itself. Once a seal starts leaking, dirt and debris work their way in as fast as oil works its way out, so a slow weep ignored for months is what turns into gear or bearing damage. Check final drive oil level and look for metal in the drained sample at every service interval, not just when a leak becomes visible. Have your dealer verify case pressure and check for metal contamination before deciding between a seal-only repair and a full final drive rebuild.
What electrical or sensor problems come up on a machine of this vintage?
This grader predates full electronic engine and hydraulic controls, so the electrical complaints reported for machines of this vintage are mostly gauge, sender, and wiring issues rather than ECM fault codes: a sticking or corroded temperature or pressure sender giving a false reading, a worn ignition/start switch, or a chafed wiring harness at the articulation joint where constant flexing eventually cracks the insulation. Because there is no fault-code readout to lean on, operators are advised to treat the analog gauges and warning lamps (oil pressure, coolant temperature, torque-converter oil temperature, charge pressure) as the primary diagnostic tool and watch for trends rather than waiting for a lamp to trip. A gauge or sender reading erratically before a real overheat event is a common early warning that gets missed. Have your dealer verify sender and gauge calibration if readings look off before assuming a mechanical fault.
What powertrain behavior should an operator watch for in hot weather or heavy cuts?
The power train on this size Komatsu grader runs a torque-converter automatic transmission, and the torque-converter oil temperature gauge is one of the most-watched instruments by experienced operators. Sustained high torque-converter temperature under load, whether from heavy cuts, steep grades, or high ambient heat, is the pattern that precedes premature clutch and converter wear. Keeping the oil cooler core and radiator fins clean is repeatedly cited as the cheapest insurance against overheating on graders of this size and era, since a partially clogged cooler shows up as a slow creep in temperature under load well before it trips a warning. Fan drive and cooler condition should be inspected before any stretch of hot-weather or high-load work; cooling package configuration varies by series, so confirm what is fitted on the specific machine.
What should I check before buying a used GD605A-3 in this serial range?
Start with paperwork: consistent service records and PM intervals matter more on a mechanical-injection, torque-converter machine like this since there is no fault-code history to fall back on. On the walkaround, look for oil, coolant, and hydraulic weeps around the engine, final drives, and circle-turn cylinders. Work the circle through full travel and feel for clunking, binding, or excess drawbar-to-circle play. Cycle articulation and wheel lean and watch for delayed or jerky response, which points to worn cylinders or a tired control valve. Check the moldboard wear inserts, cutting edge, and end bits for remaining life, and inspect tire wear for uneven patterns that suggest alignment or leaning-wheel cylinder issues. Start the engine cold if possible, watch for excess smoke or slow oil-pressure buildup, and run it long enough to see where the torque-converter and hydraulic-oil temperature gauges settle under load. Have your dealer verify hydraulic pressures, final drive oil condition, and engine compression before finalizing a purchase on any machine this age.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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