Komatsumotor grader(no series)
Komatsu GD650A-2(S/N 202001)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu GD650A-2 (S/N 202001) is a mid-to-large class motor grader built for road construction, site grading, and haul-road maintenance. It is a single-serial unit that Komatsu's own shop and O&M manuals group together with both the outgoing predecessor generation and the incoming successor generation under one combined coverage document. That document ties the GD650A/AW and related GD670A/AW series to the S6D114 engine family (KDC614T, later revised to S6D114E-1); no source names the exact engine build for S/N 202001 individually, so confirm it off the PIN plate before ordering engine parts. Operating weight across the GD650A/AW family of this era runs roughly 15,000 to 16,000 kg (33,000 to 35,000 lb) depending on moldboard length, ballast, and front attachment. Komatsu offered the grader in rear-wheel-drive (A) and all-wheel-drive (AW) configurations, with moldboard length options and an optional front scarifier/ripper, built through the mid-to-late 1990s.
S/N 202001 sits at a narrow serial break inside a single combined manual set that spans both the outgoing -1 range and the incoming -2A/2B/2C/2E range, which means running changes in hydraulics, electrical components, and cab configuration should be expected across that document even though the engine family stays consistent. That grouping is exactly why this machine matters in the used and parts market today: buyers and parts counters need to confirm the engine tag and chassis plate on the actual unit before ordering engine, transmission, or final-drive parts, since generic GD650A-2 listings can silently mix data from either side of the break.
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 GD650A-2(S/N 202001) specifications
Engine
| Engine model | S6D114 series (S6D114-1 initial production, later revised to S6D114E-1) per the Komatsu Dresser motor grader shop manual covering this serial range. Exact factory rating specific to S/N 202001 is not separately published — verify with your dealer. |
| Gross power (reference only, later same-family variant) | A later S6D114E-powered grader in this same chassis line is rated 124 kW (166 hp) gross at 2500 rpm. Not confirmed as the exact rating for S/N 202001 — treat as a class reference, not a direct spec. |
| Displacement | 8.3 L, per the S6D114 engine family |
| Cylinders | 6 |
| Emissions tier | Mid-1990s production, pre-dates EPA/EU emissions tiers; no tier rating published |
Weights
| Operating weight | Not independently published for S/N 202001 specifically. Reference figures for this chassis line vary by configuration/series: roughly 14,880 kg (32,805 lb) on a later same-family variant, up to about 15,880 kg (35,000 lb) on general class listings for this model line. Verify exact figure for this serial with your dealer. |
| Shipping weight | Not documented in available sources for this serial range |
| Ground pressure | Not published |
Dimensions
| Overall length (transport) | Varies by configuration/series for this chassis line: about 8.2 to 8.45 m (27 ft 0 in to 27 ft 9 in) across reference sources. Not confirmed for this exact serial. |
| Overall width | Varies by configuration/series: about 2.44 to 2.59 m (8 ft 0 in to 8 ft 6 in) across reference sources. Not confirmed for this exact serial. |
| Overall height (to cab) | Varies by configuration/series: about 3.1 to 3.3 m (10 ft 2 in to 10 ft 10 in) across reference sources. Not confirmed for this exact serial. |
| Wheelbase | Reference figure on a later same-family variant is 5.92 m (19 ft 5 in). Not independently confirmed for S/N 202001. |
| Rear ground clearance | Reference figure on a later same-family variant is about 279 mm (11 in). Not independently confirmed for S/N 202001. |
Performance
| Maximum forward travel speed (reference) | A later same-family variant in this chassis line lists a maximum forward speed of about 42 km/h (26 mph) across 6 forward gears. Not confirmed as the exact figure for S/N 202001. |
| Maximum reverse travel speed (reference) | A later same-family variant lists a maximum reverse speed of about 23.3 km/h (14.5 mph). Not confirmed as the exact figure for S/N 202001. |
| Gradeability | Not published in available sources |
Service capacities (summary)
| Fuel tank | Reference figure on a later same-family variant is about 340 L (90 US gal). Not independently confirmed for S/N 202001 — verify with your dealer. |
| Hydraulic system | Not published in available sources for this serial range |
| Engine oil | Not published in available sources for this serial range |
| Cooling system | Not published in available sources for this serial range |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
GD650A-2(S/N 202001) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase, with oil filter (S6D114-family diesel) | Not published for this single-unit serial break (S/N 202001) in sources checked — verify exact figure with a Komatsu dealer or the OMM lubricant chart for this PIN | Komatsu Genuine engine oil (EO series, e.g. EO15W40-DH meeting API CI-4/CH-4, ACEA E7, JASO DH-1); grade selected by ambient temperature per the OMM viscosity chart — heavier 30/15W40 in warm climates, 10W30 or 10W in cold climates |
| Cooling system (radiator + block, S6D114-family) | Not published for this single-unit serial break in sources checked — verify with dealer/OMM | Komatsu Genuine coolant (AF-NAC all-season type or equivalent supercoolant), pre-mixed with clean water; corrosion-resistor/antifreeze type per climate, year-round formula recommended over straight water plus antifreeze |
| Fuel tank | Not published for this single-unit serial break in sources checked — verify with dealer/OMM | ASTM D975 No. 2-D diesel fuel (No. 1-D or a blend permitted in cold weather to prevent waxing); sulfur content per applicable emissions tier for the engine |
| Power train / transmission case | Not published for this single-unit serial break in sources checked — verify with dealer/OMM | Komatsu Genuine transmission oil (TO series, e.g. TO30 or equivalent power-shift transmission fluid); viscosity graded by ambient temperature per the OMM chart |
| Tandem/final drive cases (each side) | Not published for this single-unit serial break in sources checked — verify with dealer/OMM | Komatsu Genuine gear oil (axle/final-drive spec, AXO series, typically 85W-140 GL-5 type) or Komatsu TO-series transmission-and-drive oil where the OMM specifies a shared spec — confirm which the plate calls for |
| Circle drive / hydraulic tank (blade lift, articulation, circle, steering circuits) | Not published for this single-unit serial break in sources checked — verify with dealer/OMM | Komatsu Genuine hydraulic oil (HO series, e.g. HO46-HM anti-wear type); viscosity graded by ambient temperature per the OMM chart |
| Front-wheel drive axle/hub oil (if AWD-equipped) | Not applicable to a standard 2WD GD650A-2 configuration; if this unit carries factory all-wheel-drive, capacity is not published for this serial break — verify with dealer/OMM | Komatsu Genuine axle oil (AXO series, gear-oil spec) where AWD hubs/axle housings are fitted |
| Grease points (pins, bushings, circle gear, drawbar) | Per grease-point interval, not a fill quantity | Komatsu Genuine multipurpose EP lithium grease, NLGI No. 2 (Komatsu G2-LI type or equivalent) |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu GD650A-2(S/N 202001) 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 GD650A-2(S/N 202001) beyond the schedule
Predictive Maintenance & Fluid Analysis
Sample engine, transmission, tandem/final-drive, and hydraulic oil at every scheduled interval on the S6D114-family diesel and powershift driveline. Track soot loading and TBN depletion on engine oil given the turbo's higher thermal load, and watch final-drive samples for chain and gear wear metal. Monitor hydraulic fluid cleanliness given the steady demand from the circle drive, lift, and steering cylinders during continuous grading work. Log turbo boost and exhaust temperature trends to catch degradation before it forces an unplanned in-frame rebuild.
Corrective & Common Repairs
Expect moldboard cutting-edge and end-bit wear from constant blade-to-material contact, plus circle wear-shoe and gear-mesh wear that shows up as play in blade positioning. Drawbar ball-and-socket and center-shift wear plates loosen with hours and need shimming or replacement. On the S6D114-family engine, turbocharger and injector wear are the recurring failure points; on the powershift driveline, tandem chain stretch and final-drive seal leaks are the other common corrective repairs on this grader class.
Overhaul & Rebuild Points
Major work centers on the engine's turbocharger, injection pump, and cylinder liners at in-frame rebuild intervals, plus the tandem case gear and chain sets that carry the final-drive load. Circle gear, wear shoes, and moldboard slide base wear as a set and rebuild best together rather than piecemeal. Steering and lift cylinders typically need reseal by mid-life, and the powershift transmission clutch packs are the other major rebuild candidate once the unit reaches high hours.
Seasonal & Environment Servicing
In cold climates, use a block heater and correct-viscosity engine and hydraulic oil for reliable starts on the S6D114-family diesel, and check coolant glycol strength before winter. In hot, dusty grading environments, shorten air-cleaner and circle/drawbar grease intervals since airborne grit accelerates wear on exposed linkage and wear shoes. Wash packed mud from the tandem cases and circle area regularly so it does not mask seal leaks or hide developing wear.
GD650A-2(S/N 202001) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 161 623 | Element, Primary Fuel Filter | Fuel system service | Check fitment → |
| 1266 752 H91 | Filter, All-Wheel Drive Hydraulic Oil | Hydraulic service | Check fitment → |
| 1266 751 H2 | Element, Converter & Differential Oil Filter | Lubrication service | Check fitment → |
| 1430 890 H1 | Screen, Filter | Scheduled service item | Check fitment → |
| 1240 893 H1 | Element, Corrosion Resistor | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
GD650A-2(S/N 202001) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| ENGINE OIL PRESSURE caution lamp | Engine lubrication oil pressure below the safe minimum | Low oil level, worn oil pump, clogged oil filter, or faulty pressure sender | Stop engine, check oil level and filter condition before restart |
| COOLANT TEMPERATURE caution lamp | Engine coolant temperature above normal operating range | Low coolant level, clogged radiator core, slipping or failed fan drive, faulty thermostat | Idle engine to cool, check coolant level and radiator/fan for debris or damage |
| CHARGE caution lamp | Battery charging circuit fault, alternator not charging | Broken or slipping alternator belt, faulty alternator, loose or corroded wiring connection | Check belt tension and battery wiring, test alternator output |
| TRANSMISSION OIL TEMPERATURE caution lamp | Power train (torque converter/transmission) oil overheating | Low transmission oil level, clogged oil cooler, prolonged high-load operation or oil converter stall | Reduce load, idle to cool, check oil level and cooler for restriction |
| TRANSMISSION CONTROLLER caution lamp | Fault detected in the power train electronic control module or its sensors/solenoids | Faulty shift solenoid, wiring/connector fault, or internal controller fault | Check wiring harness and connectors at controller and solenoids, inspect for stored fault indication at the controller |
| DIFFERENTIAL OIL TEMPERATURE caution lamp | Tandem/differential final drive oil overheating | Low differential oil level, heavy sustained drawbar load, or internal drivetrain wear generating excess heat | Reduce load, idle to cool, check final drive oil level and condition |
| BRAKE OIL PRESSURE caution lamp | Hydraulic brake system accumulator pressure below safe threshold | Brake charging pump wear, internal leakage, low hydraulic oil level, or accumulator fault | Stop machine safely, check hydraulic oil level and have brake charging circuit pressure-tested |
| AIR CLEANER RESTRICTION caution lamp | Intake air filter element clogged, restricting engine air supply | Dust/debris loading of primary or secondary air filter element | Inspect and clean or replace air filter element, check restriction indicator resets |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
GD650A-2(S/N 202001) attachments & work tools
Moldboard / grading blade
Standard moldboard for this range is 14 ft (4.27 m) long, offered in 7/8 in and 1 in thickness. Reversible, bolt-on end bits and cutting edges are stocked in 5/8 in gauge with 6 in and 8 in edge widths.
Moldboard extension
A 1/2 in extension piece is offered for the 7/8 in, 14 ft moldboard to lengthen its cast/blast reach for wider single-pass grading. It bolts to the standard blade rather than replacing it.
Blade suspension arrangement
Two drawbar/circle suspension setups are documented for this size class: a biased blade suspension and a 90-degree blade suspension. Each uses its own drawbar-lift linkage, with the biased arrangement adding right-hand and left-hand lift accumulators; the arrangement fitted affects how far the moldboard can angle and side-shift.
Scarifier / ripper toolbars
Front-mounted scarifier and rear-mounted ripper or scarifier toolbars are offered for this grader class, with shank counts varying by configuration (lighter front scarifier sets versus heavier multi-shank rear units). A pusher plate can be substituted on the rear toolbar in place of ripper or scarifier shanks for push-loading work.
Hydraulic circuit for attachments
Blade lift, circle side-shift, and drawbar lift run off the grader's own hydraulic system rather than a separate auxiliary pack. The biased-suspension drawbar lift adds a dedicated accumulator circuit, and rear ripper/scarifier cylinders tie into the same factory circuit.
Mounting / coupler system
Work tools mount through Komatsu's standard bolted grader toolbar and bolt-on end-bit/cutting-edge patterns on the moldboard, circle, and drawbar. There is no quick-attach coupler like those used on loaders or excavators; wear parts are bolt-on replaceable items shared across the size class.
Cab and control configuration
Factory-documented configuration choices for this model line include a suspension seat versus a standard seat mount, and a standard versus U-pattern transmission shifter. These are operator-station options ordered alongside the work-tool package, not ground-engaging tools themselves.
Snow wing / winter attachments
Snow wings and winter work-tool packages are common across Komatsu's heavy motor grader class, but no source ties a snow wing specifically to this GD650A-2 serial range. Treat as unconfirmed for this exact machine and verify current availability with a dealer.
All GD650A-2(S/N 202001) assemblies by section
Every catalogued assembly group for the Komatsu GD650A-2(S/N 202001). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Brakes
Komatsu : Gd650a-2(S/N 202001) : Brakes : Brake Valve
| 14***91 | Valve, Brake | 1 |
| 14***H1 | Boot | 1 |
| 14***91 | Kit, Brake Valve Seal | 1 |
Komatsu : Gd650a-2(S/N 202001) : Brakes : Brake Valve Linkage
| 14***H1 | Bolt | 2 |
| 93***R1 | Washer, M8 - Lock | 2 |
Komatsu : Gd650a-2(S/N 202001) : Brakes : Brakes
| 14***92 | Disc, Friction | 2 |
| 14***H1 | Piston | 2 |
| 14***H1 | Plate, Backing | 2 |
Komatsu : Gd650a-2(S/N 202001) : Brakes : Hydraulic Brake Lines
| 11***51 | Switch, Brake Pressure | 2 |
| 12***H1 | Hose | 2 |
| 36***R1 | O-Ring | 5 |
Komatsu : Gd650a-2(S/N 202001) : Brakes : Parking Brake - F1
| 12***H2 | Disk, Parking Brake | 1 |
| 14***H1 | Bracket, Parking Brake | 1 |
| 24***R1 | Bolt | 4 |
Komatsu : Gd650a-2(S/N 202001) : Brakes : Parking Brake Caliper
| 12***H1 | Connector | 1 |
| 12***H1 | Screw, Set | 1 |
| 12***H1 | Rod, Push | 1 |
Komatsu : Gd650a-2(S/N 202001) : Brakes : Parking Brake Lines
| 12***H1 | Hose | 1 |
| 36***R1 | O-Ring | 2 |
| 94***00 | Connector, Str O-Ring To 37? Flare | 1 |
Cooling
Komatsu : Gd650a-2(S/N 202001) : Cooling : Converter Oil Cooler Lines
| 13***55 | Clamp, Cable - Main Harness | 2 |
| 14***H1 | Hose | 1 |
| 14***H1 | Hose | 1 |
Komatsu : Gd650a-2(S/N 202001) : Cooling : Cooling System
Komatsu : Gd650a-2(S/N 202001) : Cooling : Radiator Mounting
| 11***77 | Washer, Special | 2 |
| 12***H1 | Spacer, Fan Pilot | 1 |
| 12***H2 | Rod, Radiator Support - R.H | 1 |
Komatsu : Gd650a-2(S/N 202001) : Cooling : Radiator/Oil Cooler
| 12***14 | Washer, Lock | 88 |
| 14***92 | Radiator/Oil Cooler | 1 |
| 14***H1 | Core | 1 |
Drive Train
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Charge Pump
| 12***91 | Pump Assembly, Charge | 1 |
| 12***H1 | Screw, Set | 1 |
| 12***H1 | Washer, Star | 2 |
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Clutch Pack - 1 & 5
| 12***60 | Ring, Retaining | 2 |
| 12***H1 | Ring, Seal | 3 |
| 12***H1 | Ring, Seal | 2 |
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Clutch Pack - 2 & 6
| 10***71 | Ring, Retaining | 2 |
| 12***60 | Ring, Retaining | 2 |
| 12***H1 | Ring, Seal | 3 |
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Clutch Pack - 3 & 4
| 10***71 | Ring, Retaining | 2 |
| 12***60 | Ring, Retaining | 2 |
| 12***H1 | Ring, Seal | 3 |
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Converter & Differential Oil Filter
| 12***82 | Washer, Lock | 4 |
| 12***H2 | Element, Converter & Differential Oil Filter | 1 |
| 12***91 | Filter, All-Wheel Drive Hydraulic Oil | 1 |
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Converter Oil Filter Lines
| 14***41 | Hose | 1 |
| 15***91 | Elbow, Reducer - 90? | 3 |
| 29***R1 | O-Ring | 4 |
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Declutch Pedal
| 10***96 | Adhesive, Rubber - 1 Qt. Can | 0 |
| 12***45 | Bearing, Teflon | 2 |
| 12***H1 | Spring, Pedal Return | 1 |
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Drive Line
| 12***H1 | Hose | 1 |
| 12***51 | Dipstick | 1 |
| 12***H1 | Washer, Sealing | 1 |
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Drive Shaft
| 10***61 | Fitting, Grease | 1 |
| 12***H1 | Kit, Journal & Bearing | 1 |
| 12***91 | Kit, Journal & Bearing | 1 |
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Final Drive & Tandems - With Planetary
| 15***06 | Chain - Single Strand (See Pg 07-098) | 0 |
| 15***06 | Gasket, Liquid - 300 Ml Cartridge | 1 |
| 24***R1 | Bolt, 5/8nc X 1 3/4 - Front Engine Mount Supports | 48 |
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Final Drive - With Planetary
| 10***61 | Fitting, Grease | 2 |
| 12***92 | Sleeve, Tandem Mounting | 2 |
| 12***93 | Housing, Final Drive - R.H | 1 |
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Front Cover
| 12***H1 | Gasket Eliminator 515 - 50 Ml Tube | 1 |
| 12***H1 | Sleeve, Bore | 3 |
| 12***91 | Cover Assembly, Front | 1 |
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Input Quill Assembly
| 10***11 | Pin, Cotter | 1 |
| 10***91 | Bearing Assembly | 1 |
| 10***91 | Bearing, Cone | 1 |
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Lock/Unlock Differential Bearing Quills
| 13***R1 | Cone, Bearing | 1 |
| 14***H1 | Bolt | 12 |
| 14***H1 | Quill | 1 |
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Lock/Unlock Differential Case Assembly
| 14***H1 | Bushing, Bleeder | 2 |
| 14***H1 | Screw, Bleed | 2 |
| 14***H1 | Washer, Flat | 14 |
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Lock/Unlock Differential Case Oil Lines
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Lock/Unlock Standard Differential
| 14***91 | Gear Set, Pinion And Ring | 1 |
| 14***H1 | Screw | 12 |
| 14***H1 | Washer | 12 |
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Main Case
| 11***02 | Plug, Expansion | 1 |
| 13***58 | Baffle, Oil | 1 |
| 13***61 | Case, Main | 1 |
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Output Shaft
| 10***17 | Cone, Bearing | 2 |
| 13***56 | Shaft, Output | 1 |
| 13***57 | Gear, Output | 1 |
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Planetary Assembly & Ring Gear
| 12***H1 | Washer, Thrust | 1 |
| 12***H1 | Washer, Retaining | 1 |
| 13***64 | Shaft, Input | 1 |
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Tandem Drive With Planetary Final Drive
| 12***53 | Retainer, Bearing | 4 |
| 12***H1 | Adapter, Pipe | 2 |
| 12***H1 | Seal, Oil | 4 |
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Torque Converter
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Transmission & Torque Converter
| 11***59 | O-Ring | 1 |
| 12***84 | Washer, Lock - 1/2 In | 4 |
| 12***H1 | Plate, Drive | 3 |
Komatsu : Gd650a-2(S/N 202001) : Drive Train : Transmission Control Valve
| 12***H1 | Body, Valve | 1 |
| 12***H1 | Ball | 1 |
| 12***H1 | Spring, Accumulator - Outer | 1 |
Electrical
Komatsu : Gd650a-2(S/N 202001) : Electrical : Alternator - 80 Amp
| 12***R1 | Washer, Lock - Ground Screw | 1 |
| 12***H1 | Bushing, Mounting Hinge | 1 |
| 12***H1 | Plug, Bearing Well | 1 |
Komatsu : Gd650a-2(S/N 202001) : Electrical : Alternator Mounting 80 Amp
| 12***H1 | Nut, Hex - Tighten To 70-80 Ft/Lbs Wet | 1 |
| 12***H1 | Bolt - Tighten To 70 Ft/Lbs Wet | 1 |
| 12***H1 | Bolt - Tighten To 16 Ft/Lbs Wet | 4 |
Komatsu : Gd650a-2(S/N 202001) : Electrical : Articulation Indicator
| 12***61 | Nut, Hex - No. 10-24 | 2 |
| 12***41 | Washer, Lock | 3 |
| 14***99 | Sending Unit, Articulation Indicator | 1 |
Komatsu : Gd650a-2(S/N 202001) : Electrical : Cranking Motor
| 11***99 | Nut, Hex - At Solenoid Switch | 1 |
| 12***17 | Washer, Shunt Lead To Switch Attaching | 1 |
| 12***39 | Washer, Lock - At Solenoid Switch | 1 |
Komatsu : Gd650a-2(S/N 202001) : Electrical : Engine Wiring
| 11***C2 | Switch, Engine Water Temperature | 1 |
| 12***92 | Washer, Flat - 0.25 | 2 |
| 12***H1 | Switch, Magnetic | 1 |
Komatsu : Gd650a-2(S/N 202001) : Electrical : Horn Installation
| 12***H1 | Cable, Ground | 1 |
| 19***H2 | Nut, Horn | 1 |
| 25***R1 | Washer, Hardened | 1 |
Komatsu : Gd650a-2(S/N 202001) : Electrical : Master Disconnect Switch
| 12***H1 | Cable, Battery - Jumper | 1 |
| 12***H2 | Key | 1 |
| 12***H1 | Boot, Terminal Stud | 4 |
Komatsu : Gd650a-2(S/N 202001) : Electrical : Rear Wiring
| 10***99 | Stud, Weld | 2 |
| 11***86 | Horn, Backup | 1 |
| 12***R1 | Washer, Lock - Ground Screw | 4 |
Komatsu : Gd650a-2(S/N 202001) : Electrical : Sending Units
| 11***C2 | Switch, Engine Water Temperature | 1 |
| 11***51 | Switch, Brake Pressure | 1 |
| 12***H1 | Sending Unit, Engine Water Temperature | 1 |
Komatsu : Gd650a-2(S/N 202001) : Electrical : Single Beam Halogen Lamp
| 12***H2 | Bulb | 1 |
| 12***H1 | Reflector, Lens | 1 |
| 12***H1 | Gasket | 1 |
Komatsu : Gd650a-2(S/N 202001) : Electrical : Steering Console Wiring
| 12***R1 | Washer, Lock - Ground Screw | 2 |
| 18***22 | Bolt, 1/4nc X 1 | 2 |
| 25***R1 | Bolt . . . . . . . . . . . . . . . . . . . . . 2 | 2 |
Komatsu : Gd650a-2(S/N 202001) : Electrical : Tail Lights
| 12***91 | Lights, Tail - L.H | 1 |
| 12***91 | Lights, Tail - R.H | 1 |
| 14***71 | Lens, Stop & Tail | 1 |
Komatsu : Gd650a-2(S/N 202001) : Electrical : Turn Signal Lamp
| 11***C1 | Connector, Male | 1 |
| 12***91 | Lamp, Turn Signal | 1 |
| 12***91 | Lamp Assembly, Turn Signal | 2 |
Komatsu : Gd650a-2(S/N 202001) : Electrical : Under Cab Wiring
| 11***51 | Switch, Brake Pressure | 1 |
| 12***H1 | Diode - Bulb Test Circuit | 1 |
| 12***H1 | Plate, Switch Mounting | 1 |
Engine
Komatsu : Gd650a-2(S/N 202001) : Engine : Accessories
Komatsu : Gd650a-2(S/N 202001) : Engine : Cooling System
Komatsu : Gd650a-2(S/N 202001) : Engine : Cylinder Block
Komatsu : Gd650a-2(S/N 202001) : Engine : Cylinder Head
Komatsu : Gd650a-2(S/N 202001) : Engine : Electrical System
Komatsu : Gd650a-2(S/N 202001) : Engine : Engine Mounting
Komatsu : Gd650a-2(S/N 202001) : Engine : Fuel System
Komatsu : Gd650a-2(S/N 202001) : Engine : Gasket Sets And Repair Kits
Komatsu : Gd650a-2(S/N 202001) : Engine : Lubricating Oil System
Frame
Komatsu : Gd650a-2(S/N 202001) : Frame : Articulation Joint
| 10***91 | Shim - 0.020 In. (0.508 mm) | 1 |
| 10***95 | Shim - 0.005 In. (0.127 mm) | 3 |
| 10***96 | Shim - 0.007 In. (0.178 mm) | 3 |
Komatsu : Gd650a-2(S/N 202001) : Frame : Control Valve Guard
| 14***H1 | Plate, Guard | 1 |
| 14***91 | Guard Installation, Control Valve | 1 |
| 24***R1 | Bolt, Muffler To Bracket Mounting -1/2 Nc X 1 1/2 In | 4 |
Komatsu : Gd650a-2(S/N 202001) : Frame : Main Frame
| 12***H1 | Pin, Articulation Cylinder | 4 |
| 13***45 | Pin, Hitch | 1 |
| 14***91 | Frame Weldment - Front | 1 |
Komatsu : Gd650a-2(S/N 202001) : Frame : Transmission Guard
| 15***98 | Guard Installation, Transmission | 1 |
| 16***71 | Guard, Transmission | 1 |
| 33***86 | Washer, Lock | 8 |
Hydraulics
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Accumulator
| 12***H1 | Body | 1 |
| 12***H1 | Cap, Gas End | 1 |
| 12***H1 | Piston | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Articulation Cylinder
| 10***51 | Ring, Clamp | 1 |
| 12***91 | Kit, Cylinder Seal | 1 |
| 14***04 | Ring, Piston Sealing | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Articulation Cylinder Actuator Lines
| 12***H1 | Hose | 1 |
| 12***H1 | Hose | 1 |
| 12***H1 | Hose | 2 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Articulation Joint Hydraulic Clamping
| 12***H1 | Clamp, Hydraulic Hose | 2 |
| 12***H1 | Clamp, Hose - 3-Piece Set | 2 |
| 14***H1 | Support, Hose | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Basic Hydraulics Brake Lines
| 12***H1 | Hose | 1 |
| 12***H1 | Clamp, Accumulator | 4 |
| 12***H1 | Tube | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Basic Hydraulics Pressure Lines
| 12***18 | Clamp, Hose | 2 |
| 12***H1 | Hose | 1 |
| 12***H1 | Bracket, Clamp | 2 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Basic Hydraulics Return Lines
| 12***H1 | Hose | 1 |
| 12***H1 | Hose | 1 |
| 12***H1 | Bracket, Clamp | 2 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Basic Hydraulics Sensing Lines
| 12***H1 | Coupling, Quick Disconnect | 1 |
| 12***H1 | Hose | 1 |
| 14***H1 | Hose | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Basic Hydraulics Steering Lines
| 12***82 | Washer, Lock | 4 |
| 12***H1 | Hose | 1 |
| 12***H1 | Hose | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Brake Check Valve
| 12***91 | Valve Assembly, Brake Check | 1 |
| 12***H1 | Valve, Check | 2 |
| 12***H1 | Kit, Seal | 2 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Check & Counterbalance Valve Mounting
| 12***H1 | Spacer, Valve | 2 |
| 25***R1 | Bolt, Lamp Mounting | 2 |
| 26***R1 | Bolt - For 2 Dual Counterbalance Valves | 2 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Circle Reverse Actuator Lines
| 12***H1 | Hose | 1 |
| 14***H1 | Hose | 2 |
| 27***R1 | Clamp - Use Existing Hardware | 2 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Circle Reverse Motor
| 12***91 | Motor, Circle Reverse | 1 |
| 12***H1 | Bolt | 6 |
| 12***H1 | Race, Bearing | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Control Valve - L.H. Bank
| 10***26 | Nut, Regular Hexagon (3/8 - 24 Unf) | 2 |
| 14***92 | Valve, Control - L.H. - 5 Valve Bank | 1 |
| 14***91 | Kit, Tie Rod | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Control Valve - R.H. Bank
| 10***26 | Nut, Regular Hexagon (3/8 - 24 Unf) | 2 |
| 12***H1 | Bar, Cab Top - L.H | 1 |
| 14***92 | Valve, Control - R.H. - 4 Valve Bank | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Control Valve Mounting
| 24***R1 | Bolt, Mounting (3/8 - 16x1 1/2 In) | 1 |
| 24***R1 | Screw | 5 |
| 25***R1 | Nut, Heavy Hexagon (3/8 - 16) | 6 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Control Valve Outlet Section L.H. Bank
| 14***H1 | Spring | 1 |
| 14***H1 | Ring, Retaining | 1 |
| 14***H1 | Shuttle | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Drawbar Lift Accumulator
| 10***99 | Stud, Weld | 8 |
| 12***H1 | Hose (See Pg 10-040) | 0 |
| 12***H1 | Hose (See Pg 10-034) | 0 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Drawbar Lift Actuator Lines
| 12***H1 | Hose | 2 |
| 12***H1 | Hose | 2 |
| 12***H1 | Hose (See Pg 10-040) | 2 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Drawbar Lift Cylinder
| 10***51 | Ring, Clamp | 1 |
| 14***04 | Ring, Piston Sealing | 1 |
| 14***05 | Ring, Piston Wear | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Drawbar Side Shift Accumulator
| 12***H1 | Hose (See Pg 10-044) | 0 |
| 12***H1 | Clamp, Accumulator | 4 |
| 12***91 | Accumulator Installation, Drawbar Side Shift | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Drawbar Side Shift Actuator Lines
| 12***H1 | Hose | 1 |
| 12***H1 | Hose | 1 |
| 12***H1 | Hose (See Pg 10-044) | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Drawbar Side Shift Cylinder
| 10***51 | Ring, Clamp | 1 |
| 14***04 | Ring, Piston Sealing | 1 |
| 14***05 | Ring, Piston Wear | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Dual Counterbalance & Relief Valve Drawbar Lift
| 12***H1 | Cartridge, Counterbalance | 2 |
| 12***H1 | Kit, Seal | 1 |
| 12***H1 | Cartridge, Relief Valve | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Dual Counterbalance Valve Articulation & Drawbar Shift
| 12***91 | Valve, Dual Counterbalance | 2 |
| 12***H1 | Cartridge, Counterbalance | 2 |
| 12***H1 | Kit, Seal | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Dual Pilot Check Valve Leaning Wheel, Moldboard Tilt & Ripper
| 12***91 | Valve, Dual Pilot Check | 0 |
| 12***H1 | Cartridge, Pilot Check | 2 |
| 12***H1 | Kit, Seal | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Four-Way Swivel Block
| 12***H1 | Seal | 5 |
| 14***87 | Swivel Block, Four-Way | 1 |
| 31***31 | Ring, Retaining | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Hydraulic Oil Filter
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Hydraulic Oil Tank
| 14***62 | Strainer, Suction | 1 |
| 14***23 | Gasket, Tank Cover | 1 |
| 14***91 | Tank, Hydraulic Oil | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Hydraulic System Pump
| 12***92 | Pump, Hydraulic | 1 |
| 12***91 | Compensator Assembly | 1 |
| 13***99 | Bearing, Needle | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Hydraulic System Pump Mounting
| 12***H1 | Sleeve, Pump Drive | 1 |
| 22***R1 | O-Ring | 1 |
| 23***R1 | Ring, Retaining | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Junction Block
| 12***92 | Block, Junction | 1 |
| 12***91 | Valve, Lock Pin Solenoid | 1 |
| 12***H1 | Kit, Seal | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Leaning Wheel Cylinder
| 10***51 | Ring, Clamp | 1 |
| 12***91 | Kit, Cylinder Seal | 1 |
| 14***04 | Ring, Piston Sealing | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Leaning Wheel Cylinder Actuator Lines
| 12***H1 | Hose | 1 |
| 12***H1 | Hose | 1 |
| 12***H1 | Hose | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Lock Pin Cylinder
| 10***55 | Ring, Retaining | 1 |
| 14***04 | Ring, Piston Sealing | 1 |
| 14***05 | Ring, Piston Wear | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Lock Pin Cylinder Actuator Lines
| 12***H1 | Hose | 2 |
| 12***R1 | Clamp, Tube | 2 |
| 24***R1 | Screw | 2 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Lock/Unlock Differential Control & Relief Valve
| 11***45 | O-Ring | 1 |
| 14***92 | Valve, Directional Control | 1 |
| 14***91 | Cartridge, Relief Valve | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Lock/Unlock Differential Control Valve
| 11***45 | O-Ring | 1 |
| 14***H1 | Coil, Solenoid | 1 |
| 14***92 | Valve, Directional Control | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Lock/Unlock Differential Hydraulic Pump
| 12***H1 | Pin, Drive | 1 |
| 12***94 | Seal, Oil - .5 In. Id, 1.12 In. D, .25 In. W | 1 |
| 14***91 | Pump, Lock/Unlock Differential Hydraulic | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Lock/Unlock Differential Hydraulic Pump Mounting
| 11***37 | Belt, Lock/Unlock Differential Pump Drive | 1 |
| 14***H2 | Bracket, Pump Mounting | 1 |
| 14***H1 | Bushing, Pump Pulley | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Lock/Unlock Differential Hydraulic System
| 10***13 | Hose Assembly | 2 |
| 12***H1 | Coupling, Quick Disconnect | 1 |
| 12***H1 | Hose | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Moldboard Float Valve
| 12***H1 | Spring | 2 |
| 12***H1 | Kit, O-Ring | 1 |
| 12***91 | Valve, Moldboard Float | 2 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Moldboard Float Valve Installation
| 10***71 | Elbow - 45 Degree | 2 |
| 11***C1 | Bar, Buss - 2 Hole | 1 |
| 11***C1 | Breaker, Circuit - 6 A - Auxiliary Blade Float | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Moldboard Shift Cylinder
| 10***51 | Ring, Clamp | 1 |
| 12***91 | Kit, Cylinder Seal | 1 |
| 12***91 | Cylinder Weldment | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Moldboard Shift Cylinder Actuator Lines
| 11***42 | Clamp, Tube | 2 |
| 12***82 | Washer, Lock | 4 |
| 12***H1 | Hose | 2 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Moldboard Tilt Cylinder
| 12***91 | Cylinder Weldment | 1 |
| 12***91 | Cylinder Assembly, Moldboard Power Tilt | 2 |
| 14***53 | Rod Weldment, Piston | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Moldboard Tilt Cylinder Actuator Lines
| 11***42 | Clamp, Tube | 2 |
| 12***H1 | Hose | 2 |
| 12***H1 | Hose | 2 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Optional Control Levers Scarifier/Ripper
| 12***14 | Washer, Lock | 2 |
| 12***45 | Bearing, Teflon | 2 |
| 12***H1 | Epoxy, General Purpose - 1.2 Oz | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Orbitrol Control Unit
| 12***93 | Control Unit, Orbitrol | 1 |
| 12***H1 | Pin, Centering | 1 |
| 12***H1 | Kit, Centering Spring | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Ripper Cylinder
| 10***55 | Ring, Retaining | 1 |
| 10***45 | Ring, Back-Up | 1 |
| 12***H1 | Nut, Lock - Tighten To 500 Ft/Lbs Wet | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Ripper Cylinder Actuator Lines
| 12***H1 | Hose | 2 |
| 12***H1 | Plate, Valve Mounting | 1 |
| 14***71 | Protector | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Steering & Brake Pump
| 12***91 | Pump, Steering & Brake | 1 |
| 12***H1 | Washer | 1 |
| 12***H1 | Washer, Thrust | 2 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Steering & Brake Pump Mounting
| 12***H1 | Gear | 1 |
| 12***H1 | Nut, Hex - Tighten To 137-167 Ft/Lbs Wet | 1 |
| 12***H1 | Gasket, Accessory Drive | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Steering Cylinder
| 14***58 | Ring, Back-Up | 1 |
| 14***45 | Ring, Piston Sealing | 1 |
| 14***45 | Ring, Piston Wear | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Steering Cylinder Actuator Lines
| 12***H1 | Hose | 2 |
| 14***20 | Hose | 2 |
| 36***R1 | O-Ring | 4 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Valve Section Circle Reverse
| 13***01 | Screw, Socket Head | 2 |
| 14***H1 | Cap | 1 |
| 14***H1 | End, Spool | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Valve Section L.H. Drawbar Lift & Moldboard Shift
| 13***01 | Screw, Socket Head | 2 |
| 14***H1 | Cap | 1 |
| 14***H1 | End, Spool | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Valve Section Leaning Wheel
| 13***01 | Screw, Socket Head | 2 |
| 14***H1 | Cap | 1 |
| 14***H1 | End, Spool | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Valve Section Moldboard Tilt
| 13***01 | Screw, Socket Head | 2 |
| 14***H1 | Cap | 1 |
| 14***H1 | End, Spool | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Valve Section R.H. Drawbar Lift, Drawbar Side Shift & Articulation
| 13***01 | Screw, Socket Head | 2 |
| 14***H1 | Cap | 1 |
| 14***H1 | End, Spool | 1 |
Komatsu : Gd650a-2(S/N 202001) : Hydraulics : Valve Section Scarifier Or Ripper
| 13***01 | Screw, Socket Head | 2 |
| 14***91 | Valve Section | 1 |
| 14***H1 | Cap | 1 |
Instruments
Komatsu : Gd650a-2(S/N 202001) : Instruments : Console Switch Panel
| 11***C1 | Bar, Buss - 2 Hole | 5 |
| 11***C1 | Bar, Buss - 3 Hole | 1 |
| 11***C1 | Bar, Buss - 4 Hole | 2 |
Komatsu : Gd650a-2(S/N 202001) : Instruments : Gauge Cluster
| 11***C1 | Voltmeter | 1 |
| 11***C1 | Gauge, Fuel | 1 |
| 12***C1 | Bezel | 1 |
Komatsu : Gd650a-2(S/N 202001) : Instruments : Hubodometer Installation
| 13***97 | Bolt | 4 |
| 15***16 | Cap Weldment, Hub | 1 |
| 15***19 | Hubodometer - 13.00 X 24 Tire | 1 |
Komatsu : Gd650a-2(S/N 202001) : Instruments : Lock/Unlock Differential Indicator
| 11***C1 | Bar, Buss - 2 Hole | 1 |
| 11***C1 | Breaker, Circuit - 6 A - Auxiliary Blade Float | 1 |
| 12***91 | Light, Pilot - Differential Lock On - Green | 1 |
Komatsu : Gd650a-2(S/N 202001) : Instruments : Steering Console Instrument Panel
| 12***H2 | Diode Board - Bulb Check | 1 |
| 12***H1 | Switch, Auxiliary Blade Float | 1 |
| 12***H2 | Gauge, Articulation | 1 |
Komatsu : Gd650a-2(S/N 202001) : Instruments : Tachometer Installation
| 12***C1 | Sensor, Tachometer | 1 |
| 12***91 | Tachometer, Electric | 1 |
| 12***91 | Tachometer Installation | 1 |
Miscellaneous
Komatsu : Gd650a-2(S/N 202001) : Miscellaneous : Belts And Filters
| 11***37 | Belt, Lock/Unlock Differential Pump Drive | 1 |
| 12***H1 | Element, Corrosion Resistor | 1 |
| 12***H1 | Filter, Cab Vent | 1 |
Komatsu : Gd650a-2(S/N 202001) : Miscellaneous : Decals Gd650a-2
| 09***00 | Decal, "Komatsu" (Front Edge Of Decks) | 2 |
| 09***00 | Plate? Mark,Komatsu | 1 |
| 09***15 | In Komatsu In On Grill | 2 |
Komatsu : Gd650a-2(S/N 202001) : Miscellaneous : Fire Extinguisher
Komatsu : Gd650a-2(S/N 202001) : Miscellaneous : Manual Case
| 10***R2 | Manual, Safety | 1 |
| 11***C1 | Case, Operator'S Manual | 1 |
| 11***C1 | Chain, Beaded | 1 |
Komatsu : Gd650a-2(S/N 202001) : Miscellaneous : Scarifier Tooth Storage
| 15***91 | Bracket Weldment | 1 |
| 15***92 | Lock, Bar | 1 |
| 16***45 | Retainer Weldment, Shank | 1 |
Komatsu : Gd650a-2(S/N 202001) : Miscellaneous : Tool Box & Tools
| 12***88 | Kit, Tool | 1 |
| 12***91 | Adapter - Test Port To Zerk | 1 |
| 29***00 | Wrench, Axle Nut | 1 |
Mounted Equipment
Komatsu : Gd650a-2(S/N 202001) : Mounted Equipment : 1/2 Inch Extension For 7/8 Inch Moldboard For 14 Ft. Moldboard
| 12***91 | Kit, 2 Ft. Moldboard Extension - R.H | 1 |
| 12***91 | Kit, 2 Ft. Moldboard Extension - L.H | 1 |
| 12***H2 | Extension, Moldboard - R.H | 1 |
Komatsu : Gd650a-2(S/N 202001) : Mounted Equipment : 7/8 Inch Moldboard 14 Ft. With Moveable Cylinder Mount
| 12***87 | Edge, Cutting - 5/8 In. X 8 In. X 7 Ft | 0 |
| 12***H1 | Edge, Cutting - 5/8 In. X 6 In. X 7 Ft. Heat Treated | 0 |
| 12***91 | Moldboard Assembly - 7/8 In. X 24 In. X 14 Ft | 1 |
Komatsu : Gd650a-2(S/N 202001) : Mounted Equipment : Circle Reverse Gear
| 12***91 | Gear Assembly, Circle Reverse | 1 |
| 14***45 | Plate, Mounting | 1 |
| 14***17 | Gasket | 1 |
Komatsu : Gd650a-2(S/N 202001) : Mounted Equipment : Circle Reverse Gear Case
| 12***H1 | Seal, Oil | 1 |
| 14***91 | Cover, Circle Reverse Case | 1 |
| 24***R1 | Bolt - Baffle To Rear Frame | 6 |
Komatsu : Gd650a-2(S/N 202001) : Mounted Equipment : Drawbar & Circle
| 10***85 | Pin, Cotter | 2 |
| 10***61 | Fitting, Grease | 8 |
| 10***62 | Fitting, Grease - 90 Degree | 2 |
Komatsu : Gd650a-2(S/N 202001) : Mounted Equipment : Drawbar Lift
| 10***61 | Fitting, Grease | 10 |
| 10***62 | Fitting, Grease - 90 Degree | 1 |
| 12***99 | Shim - 0.031 In. (0.787 mm) | 20 |
Komatsu : Gd650a-2(S/N 202001) : Mounted Equipment : Overlay End Bit Installation Rock Type
| 15***84 | End Bit Installation, Overlay - Rock Type | 1 |
| 15***96 | Bit, Overlay End - L.H | 1 |
| 15***97 | Bit, Overlay End - R.H | 1 |
Komatsu : Gd650a-2(S/N 202001) : Mounted Equipment : Power Tilt Moldboard Carrier
| 10***10 | Pin, Cotter | 4 |
| 10***61 | Fitting, Grease | 2 |
| 12***H2 | Wear Pad | 4 |
Komatsu : Gd650a-2(S/N 202001) : Mounted Equipment : Reversible Overlay End Bit Installation For - 5/8 In X 6 In Cutting Edge
| 12***91 | End Bit Installation, Reversible Overlay | 1 |
| 12***H1 | Bit, Reversible Overlay End | 2 |
| 33***87 | Washer, Lock | 12 |
Komatsu : Gd650a-2(S/N 202001) : Mounted Equipment : Reversible Overlay End Bit Installation For - 5/8 In X 8 In Cutting Edge
| 12***91 | End Bit Installation, Reversible Overlay | 1 |
| 12***H1 | Bit, Reversible Overlay End | 2 |
| 33***87 | Washer, Lock | 12 |
Komatsu : Gd650a-2(S/N 202001) : Mounted Equipment : Ripper Installation
| 10***54 | Fitting, Grease | 2 |
| 11***58 | Shim - 0.040 In. (1.016 mm) | 8 |
| 11***59 | Shim - 0.020 In. (0.510 mm) | 8 |
Power
Komatsu : Gd650a-2(S/N 202001) : Power : Accelerator/Decelerator Control Linkage
| 12***14 | Washer, Lock | 1 |
| 12***R1 | Washer, Lock - Ground Screw | 5 |
| 12***H2 | Washer, Nylon Bearing | 0 |
Komatsu : Gd650a-2(S/N 202001) : Power : Air Cleaner
Komatsu : Gd650a-2(S/N 202001) : Power : Air Intake System
| 12***R1 | Washer, Lock - Ground Screw | 2 |
| 12***82 | Washer, Lock | 4 |
| 12***H1 | Band Assembly, Air Cleaner | 2 |
Komatsu : Gd650a-2(S/N 202001) : Power : Ether Injection Starting Aid
| 11***C1 | Bar, Buss - 2 Hole | 1 |
| 12***14 | Washer, Lock | 4 |
| 12***17 | Washer, Shunt Lead To Switch Attaching | 2 |
Komatsu : Gd650a-2(S/N 202001) : Power : Exhaust System
| 12***82 | Washer, Lock | 2 |
| 12***H1 | Tube, Exhaust - Full Height Cab | 1 |
| 12***H1 | Muffler | 1 |
Komatsu : Gd650a-2(S/N 202001) : Power : Floor Plate
| 10***96 | Adhesive, Rubber - 1 Qt. Can | 0 |
| 11***R1 | Ring, Retaining | 2 |
| 12***45 | Bearing, Teflon | 4 |
Komatsu : Gd650a-2(S/N 202001) : Power : Fuel & Hydraulic Tank Drain Hose
| 16***18 | Hose Assembly (1/2 X 40 In. Long) | 1 |
| 25***C1 | Connector | 1 |
| 66***50 | Hose | 1 |
Komatsu : Gd650a-2(S/N 202001) : Power : Fuel Lines
| 12***H1 | Hose | 1 |
| 14***H1 | Hose | 1 |
| 14***H1 | Valve | 1 |
Komatsu : Gd650a-2(S/N 202001) : Power : Fuel Tank
| 10***96 | Adhesive, Rubber - 1 Qt. Can | 0 |
| 11*** A | Cap, Fuel Tank | 1 |
| 12***37 | Strainer, Fuel | 1 |
Komatsu : Gd650a-2(S/N 202001) : Power : Governor Control Tube Spring
| 12***91 | Tube Weldment | 1 |
| 12***H1 | Spring | 1 |
| 12***91 | Spring Assembly, Governor Control Tube | 1 |
Komatsu : Gd650a-2(S/N 202001) : Power : Lockable Oil Fill & Dipstick Installation
| 12***H2 | Cap, Oil Filler | 1 |
| 12***H1 | Seal, Fastener | 2 |
| 12***H1 | Strap, Oil Fill Retainer | 1 |
Komatsu : Gd650a-2(S/N 202001) : Power : Shift Console
| 12***92 | Washer, Flat - 0.25 | 14 |
| 12***H1 | Decal - Throttle | 1 |
| 12***H1 | Arm, Throttle Control | 1 |
Komatsu : Gd650a-2(S/N 202001) : Power : Throttle Control
| 12***R1 | Washer, Lock - Ground Screw | 3 |
| 12***H3 | Bracket | 1 |
| 12***H2 | Lever, Throttle | 1 |
Komatsu : Gd650a-2(S/N 202001) : Power : Transmission Shifter
| 11***90 | Screw, Fillister Head Machine - #10-24 X 0.875 | 1 |
| 11***C1 | Handle, Ratchet | 1 |
| 12***17 | Washer, Shunt Lead To Switch Attaching | 6 |
Komatsu : Gd650a-2(S/N 202001) : Power : Turbo Lube
| 11***26 | Adaptor, Reducing | 1 |
| 12***91 | Kit, Turbocharger Lube | 1 |
| 12***H1 | Support | 1 |
Steering
Komatsu : Gd650a-2(S/N 202001) : Steering : Steering Column
| 12***91 | Column, Steering | 1 |
| 14***H1 | Kit, Horn Brush Replacement | 1 |
| 44***56 | Ring, Retaining | 2 |
Komatsu : Gd650a-2(S/N 202001) : Steering : Steering Console
| 10***58 | Screw, Set | 2 |
| 10***96 | Adhesive, Rubber - 1 Qt. Can | 0 |
| 10***R1 | Ring, Retaining | 4 |
Komatsu : Gd650a-2(S/N 202001) : Steering : Steering Console Control Levers
| 10***96 | Adhesive, Rubber - 1 Qt. Can | 0 |
| 12***14 | Washer, Lock | 16 |
| 12***45 | Bearing | 2 |
Komatsu : Gd650a-2(S/N 202001) : Steering : Steering Control Assembly
| 12***91 | Bracket Weldment, Steering Mounting - L.H | 1 |
| 12***91 | Bracket Weldment, Steering Mounting - R.H | 1 |
| 14*** H | Bolt - Tighten To 43 ?3 Ft/Lbs Wet | 4 |
Superstructure
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Cab Assembly
| 10***96 | Adhesive, Rubber - 1 Qt. Can | 0 |
| 11***C1 | Bolt, Latch | 2 |
| 11***C1 | Bracket, Mirror Mounting | 1 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Cab Dome Light
| 12***22 | Nut-Hex Mach, 8-32 Znd 1 | 2 |
| 12***91 | Light, Cab Dome | 1 |
| 12***91 | Light Installation, Dome | 1 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Cab Glass
| 13***H1 | Seal, Window - 95.3 In | 10 |
| 14***H1 | Glass, Door - Lower | 2 |
| 14***H1 | Glass, Windshield | 1 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Cab Installation
| 11***85 | Mount, Rubber | 4 |
| 12***H1 | Washer, Special - Rops | 2 |
| 12***H1 | Washer, Special - Rops | 4 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Cab Steps
| 12***H1 | Bracket, Step Mounting - 4.29 In | 8 |
| 12***H1 | Strip, Rubber | 4 |
| 12***91 | Step Weldment, Lower | 2 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Cab Vent
| 12***75 | Nut - Mounting | 12 |
| 12***92 | Washer, Flat - 0.25 | 28 |
| 12***H1 | Filter, Cab Vent | 1 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Defroster Fan Front & Rear
| 11***C1 | Blade, Fan | 1 |
| 11***C1 | Washer, Flat | 4 |
| 11***C1 | Motor, Fan | 1 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Enclosed Cab Door - L.H.
| 10***62 | Pin, Cotter | 3 |
| 10***C1 | Pin, Cotter | 2 |
| 11***83 | Clevis | 1 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Enclosed Cab Door - R.H.
| 10***62 | Pin, Cotter | 3 |
| 10***C1 | Pin, Cotter | 2 |
| 11***83 | Clevis | 1 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Front & Rear Wiper Installation Straight Arm
| 14***H1 | Blade, Wiper - 20 In | 2 |
| 14***H1 | Arm, Wiper - 16 In. - Standard | 2 |
| 14***91 | Arm, Wiper - 16 In. - Washer Option | 2 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Heater Hose Installation
| 10***99 | Stud, Weld | 1 |
| 11***98 | Elbow - 90? | 1 |
| 12***91 | Clip, Closed | 2 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Heater Installation
| 10***96 | Adhesive, Rubber - 1 Qt. Can | 1 |
| 14***H1 | Harness, Heater | 1 |
| 14***H1 | Gasket, Heater | 1 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Hood Side
| 11***07 | Washer, Lock | 3 |
| 12***14 | Washer, Lock | 4 |
| 12***R1 | Washer, Lock - Ground Screw | 8 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Hood Top
| 12***H1 | Support - R.H. - Optional | 1 |
| 12***H1 | Hold, Hand | 1 |
| 14***92 | Hood Weldment | 1 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Inside Rear View Mirror
| 11***C1 | Bracket, Mirror Mounting | 1 |
| 11***C1 | Mirror, Convex | 1 |
| 12***77 | Nut, Mounting - 3/8-16 Hex | 2 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Lower Front Wiper Installation
| 11***C1 | Bar, Buss - 2 Hole | 1 |
| 12***61 | Nut, Hex - No. 10-24 | 2 |
| 12***91 | Washer, Plain | 12 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Mirror Installation West Coast
| 12***77 | Nut, Mounting - 3/8-16 Hex | 2 |
| 12***H1 | Head, Mirror | 1 |
| 12***H1 | Arm, Bow | 1 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Sound Insulation & Floor Mats
| 10***C1 | Adhesive | 0 |
| 12***92 | Washer, Flat - 0.25 | 8 |
| 12***94 | Washer, Plain | 2 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Standard Seat Mounting
| 11***86 | Belt, Seat | 1 |
| 12***91 | Seat Installation, Standard | 1 |
| 12***H2 | Angle, Seat Adjust - R.H | 1 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Suspension Seat Complete Assembly
| 11***C1 | Bracket - L.H | 1 |
| 11***C1 | Bracket - R.H | 1 |
| 11***C1 | Bolt, Tilt Back | 2 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Suspension Seat Lower Suspension
| 11***C1 | Pad, Spring | 1 |
| 11***C1 | Spring, Weight Adjustment | 1 |
| 11***C1 | Washer, Spring | 1 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Suspension Seat Mounting
| 11***91 | Belt, Seat | 1 |
| 12***91 | Seat Installation, Suspension | 1 |
| 28***R1 | Washer, Hardened - 3/8 In | 4 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Suspension Seat Seat Adjuster
| 11***C1 | Latch - L.H | 1 |
| 11***C1 | Latch - R.H | 1 |
| 11***C1 | Rod, Latch | 1 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Trim Group
| 12***82 | Washer, Lock | 10 |
| 12***94 | Washer, Plain | 10 |
| 12***H1 | Support - R.H. - Optional | 1 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Window Washer Installation Front & Rear
| 12***92 | Washer, Flat - 0.25 | 4 |
| 12***H1 | Hose - 108 In | 2 |
| 12***H1 | Pump, Windshield Washer | 1 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Window Washer Installation Lower Front Windows
| 12***H1 | Clip, Hose | 2 |
| 12***H1 | Pump, Windshield Washer | 1 |
| 12***H1 | Valve, Check | 1 |
Komatsu : Gd650a-2(S/N 202001) : Superstructure : Windshield Wiper Motor
| 14***91 | Motor Assembly, Windshield Wiper | 2 |
| 14***H1 | Washer, Flat | 1 |
| 14***H1 | Washer, Flat | 1 |
Suspension
Komatsu : Gd650a-2(S/N 202001) : Suspension : Front Axle
| 10***90 | Nut, Hex | 8 |
| 10***89 | Pin, Cotter | 4 |
| 10***61 | Fitting, Grease | 10 |
Wheels And Traction
Komatsu : Gd650a-2(S/N 202001) : Wheels And Traction : Wheels & Rims
| 10***90 | Nut, Hex | 32 |
| 11***48 | Clamp, Rim | 32 |
| 12***59 | Ring, Side | 1 |
GD650A-2(S/N 202001) serial number reference
The PIN/serial plate on a GD650A-series grader is riveted to the main frame, typically on the front frame rail near the articulation hinge or inside the engine compartment on the frame; some units repeat it on a plate inside the cab near the operator seat base. Komatsu graders of this era do not use a 3-character alpha PIN prefix like Caterpillar; the machine identity is the model code (e.g. GD650A-2) plus a straight numeric serial number, and different numeric serial bands mark the generation/configuration change rather than a letter code.
| Prefix | Identifies | Notes |
|---|---|---|
| 202001 | GD650A-2 (single S/N 202001) | Bare GD650A-2 is a standalone serial number, not a range: it falls between the GD650A/AW-1 run (200840 to 201999) and the GD650A/AW-2A/2B/2C run that restarts at 202002. Komatsu groups this single unit into the same shop manual family as GD530A/AW, GD650A/AW and GD670A/AW covering 200840 thru 202000, 201404, and 202002 and up, with 202001 called out separately as its own coverage line. That manual states the GD650A/AW series mounts the KDC614T / S6D114-1 / S6D114E-1 engine, and this engine statement is written for the GD650A/AW series as a whole rather than being split by serial band, so it is the best-supported engine fit for this unit. Still confirm the exact engine build off the PIN plate before ordering engine parts, since 202001 sits right at the generation transition. |
Frequently asked questions
What engine does the Komatsu GD650A-2 (S/N 202001) use?
OEM shop and O&M manual coverage for this unit's serial range ties the GD650A/GD670A series to the S6D114 engine family (KDC614T, later revised to S6D114E-1). No source names the exact engine build for S/N 202001 individually, so confirm it against the PIN plate before ordering engine parts.
What is the operating weight of the GD650A-2 (S/N 202001)?
Komatsu did not publish a separate weight figure for this single-serial unit. Machines in the GD650A/AW family of this era run roughly 15,000 to 16,000 kg (33,000 to 35,000 lb) operating weight depending on moldboard length, ballast, and front attachment, so treat this as a class range rather than an exact spec.
What replaced the GD650A-2 (S/N 202001)?
Komatsu moved to the GD650A/AW-2A, -2B, and -2C generation immediately after this serial. The related GD670A/AW-2A/2B/2C line shares the same S6D114 engine family in a larger chassis.
What GD650A-2(S/N 202001) owners discuss
What engine sits under the hood of this specific S/N 202001 grader, and why does that matter?
OEM documentation covering this unit's serial range groups S/N 202001 with both the outgoing GD650A/AW-1 range and the incoming GD650A/AW-2A/2B/2C range under one combined shop manual, and that manual ties the GD650A/GD670A series to the S6D114 engine family (KDC614T, later revised to S6D114E-1). No source names the exact engine build for S/N 202001 individually, so confirm the engine tag against the machine's own PIN plate before ordering engine parts rather than assuming from the model suffix alone.
What do mechanics say about the fuel system on this S6D114-family engine?
Graders from this era typically run a mechanical (jerk-pump) injection system rather than an electronic one, so injector wear and pump calibration drift with hours and heat instead of setting a fault code. Rough idle, light smoke, or a flat top end are usually the first real symptoms, well before anything shows on a gauge. Because there's no engine ECM on this generation, injection-system wear tends to hide until it's already advanced — regular fuel-system service and compression checks catch it earlier than waiting for a symptom.
Is oil consumption normal on these mechanical Komatsu 6-cylinder diesels, and when should it worry an owner?
Well-maintained mechanical-injection Komatsu 6-cylinder diesels of this generation are known for running long service lives, to the point that owners describe them wearing in rather than wearing out. Some oil use through the crankcase breather is normal on a high-hour unit, but consumption in the range of roughly a liter per hour is treated as a real problem, not background wear, and usually points to a washed cylinder from a leaking or misfiring injector rather than ordinary ring wear. Compression and blow-by checks are the way to separate the two.
How does the powershift transmission and torque converter behave, and what shifting complaints come up on this class of grader?
This grader class uses a powershift transmission paired with a torque converter plus a direct-drive lockup clutch, giving low-speed tractive effort through the converter and better fuel economy at travel speed once locked up. Reported symptoms on aging units include delayed or harsh shifts, a converter that feels soft or sluggish under load, and friction-plate wear on high-hour machines that shows up as slipping engagement before it shows up as a fault. Rough or unresponsive shifting is more often traced to a sticking or leaking transmission control valve than to the clutch packs themselves, so a valve inspection is the usual first step before condemning the transmission.
What wear patterns show up on the circle and moldboard slide on graders this size, and how urgent is it?
The circle guide shoes, circle gear teeth, moldboard slide rails and blade lift cylinder connections are the parts that wear fastest and need the most frequent attention on any grader in this weight class. As the front shoes wear, they need to be adjusted forward to keep backlash in the circle gear; letting the teeth run fully meshed with no play overloads the circle drive shaft and housing. The usual adjustment order is backlash first (moving the circle fore-and-aft against the pinion), then the shoes to true the circle path, then vertical play last. Because an overloaded circle drive shaft is a structural failure point under load, have your dealer verify circle backlash and shoe adjustment rather than eyeballing it.
What electrical or sensor faults come up most on this generation of Komatsu grader monitor panel?
On mechanical-engine graders like this one there's no engine ECM to throw codes, but the cab monitor panel still reads sensors for coolant temperature, hydraulic filter restriction, charge and similar circuits. On aging machines, the pattern is less about a bad sensor and more about a deteriorating wiring harness or corroded connector causing an intermittent or false warning. Before replacing a sensor, checking connector condition, ground points and harness routing near the engine and circle drive housing catches most of these complaints.
What should a buyer check before purchasing a used GD650A-2 (S/N 202001) grader?
Walk the main frame and circle housing looking for fishplates or weld repairs over cracks, and ask who did the welding. Check the circle for even wear, proper backlash and shoe adjustment rather than play taken up with shims. Inspect the moldboard for straightness and remaining cutting edge thickness, and look under the machine and around the circle drive housing and blade lift cylinders for fresh leaks. Check articulation pins and hinge points for slop, compare tire wear and hydraulic hose condition against the hour meter for consistency, and ask for maintenance records showing regular oil, filter and fuel-system service, since the mechanical injection system on this engine hides wear until it's already advanced. Have your dealer verify circle backlash, frame welds and articulation pin wear before final purchase, since these are structural and steering-related items.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Need a specific GD650A-2(S/N 202001) part?
Search live OEM part data, check fitment, and cross-reference alternatives with Heavy Parts AI.