Komatsumotor grader(no series)
Komatsu GD530A-1/AW-1(S/N 200840-201999)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu GD530A-1/AW-1 (S/N 200840-201999) is a medium-to-heavy motor grader from the Komatsu-Dresser joint-venture era, built for road maintenance, site grading, and material spreading. It carries the KDC610T engine badge, cross-referenced to the Komatsu S6D102-1/S6D102E-1 six-cylinder diesel family: mechanically governed, with no electronic engine controls or stored fault codes on this serial range. This build is the entry generation of the GD530 lineage, covering S/N 200840 through 201999, produced in the late 1980s to early 1990s under the joint Komatsu-Dresser nameplate before the line moved fully under Komatsu branding. It was offered in two drivetrain configurations: the A model with rear tandem drive only, and the AW model adding front-wheel drive for extra traction in soft or loose material. It was later succeeded by the GD530A/AW-2A/2B/2C series (S/N 202,002-up), the -2B/2C variant on the S6D102E engine (S/N 203,163-up), and the -2EY variant (S/N 210,098-up).
Across the GD530 generations the core chassis, drivetrain layout, and blade/circle system stayed similar, but the engine tag and fuel system moved forward with each serial break, eventually reaching electronically assisted diesels far removed from this mechanically governed -1 generation. On this early build, diagnostics run entirely through gauges and warning lamps, and troubleshooting follows symptom charts rather than stored codes, which keeps the machine simple to work on but leaves no shortcut when something goes wrong. In the used and parts market today, the GD530A-1/AW-1 is valued for that same simplicity: no ECM to fail, straightforward mechanical fuel and hydraulic systems, and a chassis, circle, and torque converter architecture shared closely enough with later GD530/GD650/GD670 siblings that used and aftermarket parts stay available. Machines in this serial range are past their front-line grading years and are typically bought for rebuild, parts support, or continued light-duty service.
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 GD530A-1/AW-1(S/N 200840-201999) specifications
Engine
| Engine model | KDC610T, the Komatsu-Dresser turbocharged inline diesel factory-fitted to this GD530A-1/AW-1 serial range. The later S6D102-1 and S6D102E engines belong only to the follow-on -2 series (from S/N 202,002 and S/N 203,163 respectively) and are not fitted to this 200840-201999 range. |
| Gross/net power | Not documented for this specific serial range in available spec sheets. Do not substitute the later -2C series rating, since that generation uses a different engine. Verify with a Komatsu dealer or the shop manual engine section for this serial range. |
| Displacement / cylinders | Not documented for this exact serial range. Family literature for the KDC410/KDC610/KDC614 engine series points to an inline diesel, but a confirmed cylinder count and displacement figure specific to this machine could not be verified. |
| Emissions tier | Not applicable. This is a pre-emissions-era (early-to-mid 1990s) industrial diesel with no certified emissions tier. |
Weights
| Standard operating weight | Approx. 12,882 kg (28,400 lb) per general GD530A spec listings. This figure is noticeably lighter than the confirmed -2C generation weight (about 13,720-13,860 kg / 30,247-30,556 lb), which fits with it representing the earlier -1 series, but it is not explicitly tied to the 200840-201999 serial break in the source. Treat as an approximate reference and confirm against the machine's data plate. |
| Shipping weight | Not documented for this serial range. |
| Ground pressure | Not published for this serial range. |
Dimensions
| Standard operating length | Approx. 8.43 m (27 ft 8 in), per general GD530A spec listings (same caveat as operating weight above). |
| Standard operating width | Approx. 2.39 m (7 ft 10 in). |
| Standard operating height | Approx. 3.28 m (10 ft 9 in). |
| Wheelbase / ground clearance / blade base | Not confirmed for this -1 serial range. Figures found in searches (wheelbase, rear ground clearance, blade base) were explicitly tied to the later GD530A-2C, which is a different engine generation and is excluded here to avoid cross-variant contamination. |
Performance
| Travel speed (forward/reverse) | Not documented for this serial range in available sources. |
| Moldboard (blade) width | Family literature for the GD530 series commonly cites a moldboard in the 3.6-3.7 m (12 ft) class, but a figure confirmed specifically for the 200840-201999 serial range was not found. Verify against the machine's own equipment tag or the shop manual for this range. |
| Tire size | 14.00-24, commonly specified across the GD530A family including period auction listings for this chassis; not separately confirmed as unique to this serial range. |
| Gradeability | Not published for this serial range. |
Service capacities (summary)
| Fuel tank | Not documented for this serial range in available sources. |
| Hydraulic system | Not documented for this serial range. |
| Engine oil | Not documented for this serial range. |
| Cooling system | Not documented for this serial range. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
GD530A-1/AW-1(S/N 200840-201999) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) - KDC610T turbocharged diesel | Not published for this exact serial range in accessible dealer/parts literature. Other Komatsu-family machines using S6D102-class diesels (excavators, wheel loaders) refill at roughly 19 to 24 L (5.0 to 6.3 US gal) with filter change, so this grader likely falls in that band, but the grader-specific oil pan capacity is not confirmed - verify with a Komatsu dealer or the OMM before servicing. | Komatsu genuine diesel engine oil (EO class). SAE 15W-40 covers most ambient ranges; Komatsu OMMs of this era call for lighter grades (SAE 10W or 10W-30) in sustained cold below roughly -10 deg C and straight SAE 30 or 40 in sustained heat above roughly 30 deg C. Use an API CF/CF-4 or later diesel oil meeting Komatsu spec. |
| Cooling system | Not documented for this serial range in available sources - verify with dealer/OMM. | Komatsu Super Coolant (AF-NAC) ethylene-glycol antifreeze/corrosion inhibitor, pre-mixed or diluted with water per climate (typically 30 to 50 percent concentration for freeze protection down to roughly -15 to -36 deg C). Do not mix with non-Komatsu coolant types. |
| Fuel tank | Not documented for this specific serial range. Komatsu motor graders of this general weight class typically carry fuel tanks in the 230 to 340 L (60 to 90 US gal) range, but this is a generic class figure, not a confirmed GD530A-1/AW-1 number - verify with dealer/OMM. | No. 2-D diesel fuel (ASTM D975), low-sulfur where required by era/region. |
| Transmission (powertrain) case | Not documented for this serial range in accessible sources - verify with dealer/OMM. | Komatsu genuine powertrain oil (TO class). TO10 is the thinner grade for cold-climate startup; TO30 is the standard/heavier grade for normal and hot-climate operation. |
| Hydraulic system and tank (steering, blade circuit, implement circuit) | Not documented for this serial range in accessible sources - verify with dealer/OMM. | Komatsu genuine hydraulic oil (HO class), typically HO46 for standard climates, with HO32 or similar lighter grade for cold climates and HO56 for sustained high ambient temperatures. |
| Final drives / wheel drive housings (each side, where equipped) | Not documented for this serial range in accessible sources - verify with dealer/OMM. | Komatsu genuine powertrain oil (TO30) or gear oil equivalent, per the fluid used in the adjoining transmission/differential circuit. |
| Circle drive / tandem or differential case (where equipped on this chassis) | Not documented for this serial range in accessible sources - verify with dealer/OMM. | Komatsu genuine powertrain oil (TO30) or an SAE 80W-90 gear oil equivalent. |
| Front wheel drive / steering axle housing (where equipped) | Not documented for this serial range in accessible sources - verify with dealer/OMM. | SAE 80W-90 gear oil (Komatsu AXO80 axle oil or equivalent), stepping to 85W-140 in hot climates. |
| Grease points (pins, bushings, blade circle, articulation) | Not applicable - grease is applied per point at scheduled intervals, not a fill capacity. | Komatsu G2-LI multipurpose lithium grease (NLGI 2), or an equivalent multipurpose EP lithium grease rated for construction equipment pins and bushings. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu GD530A-1/AW-1(S/N 200840-201999) 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 GD530A-1/AW-1(S/N 200840-201999) beyond the schedule
Predictive Maintenance & Fluid Analysis
With no ECM or fault codes on this engine, scheduled oil sampling is the main early-warning tool. Sample engine oil, torque converter oil, and tandem case oil at each change interval to track S6D102-family wear metals, clutch material, and gear wear before failure. Watch torque converter oil for varnish or sludge, an early sign the bypass valve is sticking and letting the converter run hot. Check wet disc brake fluid for water contamination, common on machines stored outdoors between shifts.
Corrective & Common Repairs
Circle guide shoes wear first on this generation and let the moldboard drift under load; check clearance and shim or replace before the circle gear itself takes damage. Anti-drift check valves on the blade lift and circle-shift cylinders lose spring tension with age, letting the blade creep down while parked; test and replace them as a set. Wet disc brake packs on the tandem housings glaze from heat cycling in grading work; check pedal travel and disc wear at every scheduled service.
Overhaul & Rebuild Points
Torque converter rebuilds on this generation center on the bypass valve, which sticks with age and causes overheating and slipping; clean or replace it and inspect the charge pump on teardown. The tandem cases and circle/drawbar assembly carry the heaviest wear on this machine and are the most common full-rebuild candidates. Because the KDC610T predates electronic engine controls, injector pump and governor work belongs with a mechanical diesel shop, not a Komatsu ECM tool, when the engine comes apart for overhaul.
Seasonal & Environment Servicing
Cold starts on this mechanically governed engine benefit from a block heater and correct winter-viscosity oil, since there is no electronic cold-start assist to fall back on. Check coolant strength and corrosion inhibitor before winter; this engine generation has no long-life coolant monitoring built in. In dusty grading work, service the air cleaner and hit the circle and drawbar grease points more often, since accelerated wear at the guide shoes and ball-and-socket joint is the main failure mode in abrasive, high-dust conditions.
GD530A-1/AW-1(S/N 200840-201999) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 1298 058 H1 | Element, Outer Air Cleaner | Air intake service | Check fitment → |
| 1298 059 H1 | Element, Inner Air Cleaner | Air intake service | Check fitment → |
| 1281 327 H1 | Element, Hydraulic Oil Filter (9.5 Inches Long) | Hydraulic service | Check fitment → |
| 1266 752 H91 | Filter, All-Wheel Drive Hydraulic Oil | Hydraulic service | Check fitment → |
| 1281 326 H91 | Filter, All Wheel Drive Hydraulic Oil | Hydraulic service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
GD530A-1/AW-1(S/N 200840-201999) attachments & work tools
Moldboard (blade)
Standard moldboard on this class runs around 3.7 m (12 ft); a 4.3 m (14 ft) extended moldboard is offered as a factory option for wider grading swaths. Mounted on the circle with hydraulic side-shift and tilt, plus independent left/right blade lift.
Front-mount scarifier
Bolt-on scarifier frame mounts ahead of the moldboard on the front of the main frame, carrying a row of replaceable shanks/teeth for breaking up compacted or frozen surface material before grading.
Mid-mount (underbody) scarifier
Underbody scarifier mounts beneath the circle/drawbar between the front axle and moldboard, letting the operator rip directly ahead of the blade in one pass. Shanks are interchangeable with the rear ripper's.
Rear ripper
Multi-shank ripper (commonly a 5-tooth arrangement for this size class) mounts behind the tandem for breaking hard-packed base or old pavement. Hydraulically raised and lowered, with shanks shared across the scarifier lineup.
Push block / push plate
Front-mounted push block/plate bolts to the front frame in place of or alongside the scarifier, used for light dozing or pushing windrowed material. Standard bolt-on mount, no separate hydraulic kit required.
Circle and drawbar hydraulics
Blade lift (each side independent), circle side-shift, drawbar side-shift, moldboard tilt, and frame articulation are all hydraulically actuated as standard equipment, giving most of the grading versatility without add-on kits. Leaning front wheel is also hydraulically controlled.
Mounting / coupler style
Moldboard, scarifier, and ripper attach via bolt-on brackets, pins, and shank clamps to the circle, drawbar, and frame rather than a quick-attach coupler; work tools are swapped with hand tools, not a hydraulic quick-coupler.
Cab and operator guarding
Factory-configurable with an enclosed ROPS cab and air conditioning; a hinged lower front window and wiper arrangement are part of the standard superstructure option set for this series.
Snow removal equipment
Not documented for this exact serial range in available factory literature; if a snow wing or underbody snow blade was fitted, treat it as a dealer/aftermarket addition and verify compatibility with your dealer.
All GD530A-1/AW-1(S/N 200840-201999) assemblies by section
Every catalogued assembly group for the Komatsu GD530A-1/AW-1(S/N 200840-201999). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Belts And Filters
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Belts And Filters : Belts And Filters
| 12***H1 | Element, Engine Oil Filter | 1 |
| 12***H1 | Filter, Cab Vent | 1 |
| 12***H2 | Element, Converter & Differential Oil Filter | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Belts And Filters : Decals Gd530a-1
| 09***00 | Decal, "Komatsu" (Front Edge Of Decks) | 2 |
| 09***00 | Plate? Mark,Komatsu | 1 |
| 09***15 | In Komatsu In On Grill | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Belts And Filters : Decals Gd530aw-1
| 09***00 | Decal, "Komatsu" (Front Edge Of Decks) | 2 |
| 09***00 | Plate? Mark,Komatsu | 1 |
| 09***15 | In Komatsu In On Grill | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Belts And Filters : Fire Extinguisher
| 12***92 | Washer, Flat - 0.25 | 4 |
| 12***91 | Installation, Fire Extinguisher | 1 |
| 12***91 | Channel Weldment | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Belts And Filters : Manual Case
| 10***R2 | Manual, Safety | 1 |
| 11***C1 | Case, Operator'S Manual | 1 |
| 11***C1 | Chain, Beaded | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Belts And Filters : Scarifier Tooth Storage
| 15***91 | Bracket Weldment | 1 |
| 15***92 | Lock, Bar | 1 |
| 16***45 | Retainer Weldment, Shank | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Belts And Filters : Tool Box & Tools
| 12***88 | Kit, Tool | 1 |
| 12***91 | Adapter - Test Port To Zerk | 1 |
| 29***00 | Wrench, Axle Nut | 1 |
Brakes
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Brakes : Brake Valve
| 12***91 | Valve, Brake | 1 |
| 12***91 | Kit, Brake Valve Seal | 1 |
| 12***H1 | Adaptor | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Brakes : Brake Valve Linkage
| 14***H1 | Bolt | 2 |
| 93***R1 | Washer, M8 - Lock | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Brakes : Brakes
| 14***H1 | Seal, Outer Piston | 2 |
| 14***H1 | Seal, Inner Piston | 2 |
| 14***92 | Disc, Friction | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Brakes : Hydraulic Brake Lines
| 11***51 | Switch, Brake Pressure | 2 |
| 12***H1 | Hose | 2 |
| 36***R1 | O-Ring | 6 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Brakes : Parking Brake - F1
| 12***H2 | Disk, Parking Brake | 1 |
| 14***H1 | Bracket, Parking Brake | 1 |
| 14***H1 | Bolt | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Brakes : Parking Brake Caliper
| 12***91 | Caliper, Parking Brake | 1 |
| 14***91 | Pad, Brake | 2 |
| 14***H1 | Bleeder | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Cooling : Converter Oil Cooler Lines
| 13***55 | Clamp, Cable - Main Harness | 2 |
| 14***H1 | Hose | 1 |
| 14***H1 | Hose | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Cooling : Cooling System
| 12***H1 | Hose, Coolant | 1 |
| 12***H1 | Hose, Lower Radiator | 1 |
| 14***44 | Valve, Shut-Off | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Cooling : Radiator Mounting
| 11***77 | Washer, Special | 2 |
| 12***H1 | Rod, Radiator Support - L.H | 1 |
| 12***H1 | Rod, Radiator Support - R.H | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Cooling : Radiator/Oil Cooler
| 12***14 | Washer, Lock | 88 |
| 12***H1 | Cap, Radiator | 1 |
| 14***92 | Radiator/Oil Cooler | 1 |
Drive Train
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Charge Pump
| 12***91 | Pump Assembly, Charge | 1 |
| 12***H1 | Screw, Set | 1 |
| 12***H1 | Washer, Star | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Clutch Pack - 1 & 5
| 12***60 | Ring, Retaining | 2 |
| 12***H1 | Ring, Seal | 3 |
| 12***H1 | Ring, Seal | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Clutch Pack - 2 & 6
| 10***71 | Ring, Retaining | 2 |
| 12***60 | Ring, Retaining | 2 |
| 12***H1 | Ring, Seal | 3 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Clutch Pack - 3 & 4
| 10***71 | Ring, Retaining | 2 |
| 12***60 | Ring, Retaining | 2 |
| 12***H1 | Ring, Seal | 3 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Converter Oil Filter Lines
| 14***41 | Hose | 1 |
| 15***91 | Elbow, Reducer - 90? | 3 |
| 29***R1 | O-Ring | 4 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Declutch Pedal
| 10***85 | Pin, Cotter | 1 |
| 10***96 | Adhesive, Rubber - 1 Qt. Can | 0 |
| 12***45 | Bearing, Teflon | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Differential Assembly Nospin Differential
| 14***H1 | Cover | 1 |
| 14***H1 | Housing | 1 |
| 14***91 | Gear Set, Pinion And Ring | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Differential Bearing Quills Lock/Unlock
| 13***R1 | Cone, Bearing | 1 |
| 14***H1 | Bolt | 12 |
| 14***H1 | Quill | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Differential Bearing Quills Nospin Differential
| 13***91 | Bearing Assembly | 1 |
| 13***91 | Bearing, Cone | 1 |
| 14***83 | Quill | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Differential Case Assembly Lock/Unlock Differential
| 14***H1 | Bushing, Bleeder | 2 |
| 14***H1 | Screw, Bleed | 2 |
| 14***91 | Breather | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Differential Case Assembly Nospin Differential
| 14***H1 | Bushing, Bleeder | 2 |
| 14***H1 | Screw, Bleed | 2 |
| 14***91 | Breather | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Differential Case Oil Lines Lock/Unlock
| 14***H1 | Adaptor | 1 |
| 14***H1 | Bracket | 2 |
| 14***H1 | Line, Oil | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Drive Line
| 12***H1 | Hose | 1 |
| 12***51 | Dipstick | 1 |
| 12***91 | Support Weldment, Radiator & Engine | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Drive Shaft
| 10***61 | Fitting, Grease | 1 |
| 12***H1 | Kit, Journal & Bearing | 1 |
| 12***91 | Kit, Journal & Bearing | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Final Drive & Tandems With Planetary
| 12***91 | Axle Assembly | 1 |
| 15***06 | Chain - Single Strand (See Pg 07-098) | 0 |
| 15***06 | Gasket, Liquid - 300 Ml Cartridge | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Final Drive & Tandems Without Planetary
| 12***91 | Axle Assembly | 1 |
| 15***06 | Gasket, Liquid - 300 Ml Cartridge | 1 |
| 24***R1 | Bolt, 5/8nc X 1 3/4 - Front Engine Mount Supports | 48 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Final Drive - Without Planetary
| 10***61 | Fitting, Grease | 2 |
| 12***92 | Sleeve, Tandem Mounting | 2 |
| 12***H3 | Retainer, Bearing | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Input Quill Assembly
| 10***11 | Pin, Cotter | 1 |
| 10***91 | Bearing Assembly | 1 |
| 10***91 | Bearing, Cone | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Main Case
| 11***02 | Plug, Expansion | 1 |
| 13***58 | Baffle, Oil | 1 |
| 13***61 | Case, Main | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Nospin Differential
| 14***91 | Spider Assembly | 1 |
| 14***91 | Clutch Assembly | 2 |
| 14***H1 | Stop | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Output Shaft
| 10***17 | Cone, Bearing | 2 |
| 13***56 | Shaft, Output | 1 |
| 13***57 | Gear, Output | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Planetary Assembly & Ring Gear
| 12***H1 | Washer, Retaining | 1 |
| 12***H1 | Washer, Thrust | 1 |
| 12***93 | Assembly, Final Drive | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Standard Differential Lock/Unlock
| 14***91 | Gear Set, Pinion And Ring | 8 |
| 14***H1 | Screw | 12 |
| 14***H1 | Washer | 12 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Tandem Drive With Planetary Final Drive
| 12***53 | Retainer, Bearing | 4 |
| 12***H1 | Adapter, Pipe | 2 |
| 12***H1 | Seal, Oil | 4 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Tandem Drive Without Planetary Final Drive
| 12***53 | Retainer, Bearing | 4 |
| 12***H1 | Adapter, Pipe | 2 |
| 12***H1 | Seal, Oil | 4 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Torque Converter
| 12***H1 | Hub, Impeller | 1 |
| 12***H1 | Stator | 1 |
| 12***H1 | Hub, Stator | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Transmission & Torque Converter
| 11***59 | O-Ring | 1 |
| 12***84 | Washer, Lock - 1/2 In | 4 |
| 12***H1 | Plate, Drive | 3 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Drive Train : Transmission Control Valve
| 12***H1 | Body, Valve | 1 |
| 12***H1 | Ball | 1 |
| 12***H1 | Spring, Accumulator - Outer | 1 |
Electrical
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Electrical : Air Conditioner/Heater Electrical Wiring
| 11***51 | Grommet | 1 |
| 14***91 | Harness, Heater Wiring | 1 |
| 14***H1 | Resistor Assembly | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Electrical : Alternator - 50 Amp
| 12***H1 | Bushing, Mounting Hinge | 1 |
| 12***H1 | Bolt, Field Coil And Support | 4 |
| 12***H1 | Bearing, Ball | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Electrical : Alternator - 80 Amp
| 12***R1 | Washer, Lock - Ground Screw | 1 |
| 12***H1 | Bushing, Mounting Hinge | 1 |
| 12***H1 | Plug, Bearing Well | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Electrical : Alternator Mounting 80 Amp
| 12***H1 | Nut, Hex - Tighten To 70-80 Ft/Lbs Wet | 1 |
| 12***H1 | Bolt - Tighten To 16 Ft/Lbs Wet | 4 |
| 12***H1 | Bolt - Tighten To 70 Ft/Lbs Wet | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Electrical : Articulation Indicator
| 12***61 | Nut, Hex - No. 10-24 | 2 |
| 12***41 | Washer, Lock | 3 |
| 14***99 | Sending Unit, Articulation Indicator | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Electrical : Awd Electrical System
| 12***H1 | Wiring Harness, Rear Wheel Sensor | 1 |
| 12***H1 | Harness, Front Sensor | 1 |
| 12***H1 | Sensor - R.H. Only (See Pg 08-018) | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Electrical : Awd Wiring Diagram
| 11***C1 | Bar, Buss - 2 Hole | 1 |
| 11***C1 | Breaker, Circuit - 6 A - Auxiliary Blade Float | 1 |
| 12***H1 | Wiring Harness, Rear Wheel Sensor | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Electrical : Battery & Connections
| 10***81 | Rod, Battery Clamp | 3 |
| 12***82 | Washer, Lock | 3 |
| 12***H1 | Cable, Battery - Jumper | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Electrical : Blade Flood Light Installation Halogen Lamps
| 11***C1 | Bar, Buss - 2 Hole | 1 |
| 12***17 | Washer, Shunt Lead To Switch Attaching | 2 |
| 12***14 | Nut, Hex | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Electrical : Cranking Motor
| 12***H1 | Insulator, Field Terminal - Inside Frame | 1 |
| 12***H1 | Insulator, Field Terminal - Outside Frame | 1 |
| 12***H1 | Armature | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Electrical : Engine Wiring
| 11***C2 | Switch, Engine Water Temperature | 1 |
| 12***92 | Washer, Flat - 0.25 | 2 |
| 12***H1 | Switch, Magnetic | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Electrical : Front Bar Head Light Installation
| 11***C1 | Bar, Buss - 2 Hole | 1 |
| 12***17 | Washer, Shunt Lead To Switch Attaching | 2 |
| 12***R1 | Washer, Lock - Ground Screw | 3 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Electrical : Horn Installation
| 12***H1 | Cable, Ground | 1 |
| 19***H2 | Nut, Horn | 1 |
| 25***R1 | Washer, Hardened | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Electrical : Master Disconnect Switch
| 12***H1 | Cable, Battery - Jumper | 1 |
| 12***H2 | Key | 1 |
| 12***H1 | Boot, Terminal Stud | 4 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Electrical : Rear Wiring
| 10***99 | Stud, Weld | 2 |
| 11***86 | Horn, Backup | 1 |
| 12***R1 | Washer, Lock - Ground Screw | 4 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Electrical : Rear Work Light Installation
| 11***C1 | Bar, Buss - 2 Hole | 1 |
| 12***17 | Washer, Shunt Lead To Switch Attaching | 2 |
| 12***14 | Nut, Hex | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Electrical : Sending Units
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Electrical : Single Beam Halogen Lamp
| 12***H2 | Bulb | 1 |
| 12***H1 | Reflector, Lens | 1 |
| 12***H1 | Gasket | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Electrical : Steering Console Wiring
| 11***C1 | Flasher, Turn Signal | 1 |
| 12***61 | Nut, Hex - No. 10-24 | 2 |
| 12***R1 | Washer, Lock - Ground Screw | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Electrical : Tail Lights
| 12***91 | Lights, Tail - L.H | 1 |
| 12***91 | Lights, Tail - R.H | 1 |
| 14***71 | Lens, Stop & Tail | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Electrical : Turn Signal Lamp
| 11***C1 | Connector, Male | 1 |
| 12***91 | Lamp, Turn Signal | 1 |
| 12***91 | Lamp Assembly, Turn Signal | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Engine : Accessories
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Engine : Cooling System
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Engine : Cylinder Block
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Engine : Cylinder Head
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Engine : Electrical System
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Engine : Engine Mounting
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Engine : Fuel System
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Engine : Gasket Sets And Repair Kits
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Engine : Lubricating Oil System
Frame
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Frame : Main Frame
| 12***H1 | Pin, Articulation Cylinder | 4 |
| 12***91 | Frame Weldment - Rear | 1 |
| 13***45 | Pin, Hitch | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Frame : Pusher Plate
| 12***84 | Washer, Lock - 1/2 In | 2 |
| 15***02 | Cover | 1 |
| 15***03 | Gasket | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Frame : Transmission Guard
| 15***98 | Guard Installation, Transmission | 1 |
| 16***71 | Guard, Transmission | 1 |
| 33***86 | Washer, Lock | 8 |
Hydraulics
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Accumulator
| 12***H1 | Body | 1 |
| 12***H1 | Cap, Gas End | 1 |
| 12***H1 | Piston | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Articulation Cylinder
| 10***51 | Ring, Clamp | 1 |
| 12***91 | Kit, Cylinder Seal | 1 |
| 14***04 | Ring, Piston Sealing | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Awd Hydraulic Oil Filter
| 12***H2 | Element, Converter & Differential Oil Filter | 1 |
| 12***91 | Filter, All-Wheel Drive Hydraulic Oil | 1 |
| 12***91 | Indicator Assembly | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Awd Hydraulic Oil Tank
| 11***01 | Elbow, Street - 90 Degree | 1 |
| 11***55 | Strainer, Tank | 1 |
| 14***62 | Strainer, Suction | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Awd Motor
| 13***39 | Kit, Rotating Group | 1 |
| 13***40 | Seal, Shaft | 1 |
| 13***41 | Pin | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Awd Pump
| 12***91 | Pump, All-Wheel Drive | 1 |
| 12***H1 | Housing | 1 |
| 12***H1 | Bolt | 4 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Awd Pump & Transfer Case
| 12***91 | Pump And Transfer Case Installation | 1 |
| 13***91 | Bolt - Case To Transmission - 1.25 In. Long | 4 |
| 15***67 | Gasket | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Awd Pump Hydraulic Control
| 12***91 | Control Assembly, Piston | 1 |
| 13***03 | Kit, Seal | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Awd Pump Rotary Group
| 13***03 | Kit, Seal | 1 |
| 13***81 | Rotary Assembly | 1 |
| 13***82 | Plate, Control | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Basic Hydraulics Awd - Hic Valve To Motors
| 10***93 | Tie | 4 |
| 12***H1 | Clamp, Hose | 2 |
| 12***H1 | Clip | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Basic Hydraulics Awd - Pump To Hic Valve
| 10***34 | Valve, Check | 1 |
| 10***99 | Stud, Weld | 6 |
| 11***10 | Flange, Split | 4 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Basic Hydraulics Awd - Tank To Oil Cooler
| 10***98 | Cooler, Oil | 1 |
| 12***82 | Washer, Lock | 4 |
| 12***H1 | Hose | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Basic Hydraulics Brake Lines
| 12***H1 | Hose | 1 |
| 12***H1 | Clamp, Accumulator | 4 |
| 12***H1 | Tube | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Basic Hydraulics Pressure Lines
| 12***18 | Clamp, Hose | 2 |
| 12***H1 | Hose | 1 |
| 12***H1 | Bracket, Clamp | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Basic Hydraulics Return Lines
| 12***H1 | Hose | 1 |
| 12***H1 | Hose | 1 |
| 12***H1 | Bracket, Clamp | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Basic Hydraulics Sensing Lines
| 12***H1 | Coupling, Quick Disconnect | 1 |
| 12***H1 | Hose | 1 |
| 14***H1 | Hose | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Basic Hydraulics Steering Lines
| 12***82 | Washer, Lock | 4 |
| 12***H1 | Hose | 1 |
| 12***H1 | Hose | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Brake Check Valve
| 12***91 | Valve Assembly, Brake Check | 1 |
| 12***H1 | Valve, Check | 2 |
| 12***H1 | Kit, Seal | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Circle Reverse Actuator Lines
| 12***H1 | Hose | 1 |
| 14***H1 | Hose | 2 |
| 27***R1 | Clamp, Cable | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Circle Reverse Motor
| 12***91 | Motor, Circle Reverse | 1 |
| 12***H1 | Bolt | 6 |
| 12***H1 | Race, Bearing | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 | Inlet Section | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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***91 | Valve, Control - R.H. - 7 Valve Bank | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Drawbar Lift Actuator Lines
| 12***H1 | Hose | 2 |
| 12***H1 | Hose | 2 |
| 12***H1 | Hose (See Pg 10-040) | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Drawbar Lift Cylinder
| 10***51 | Ring, Clamp | 1 |
| 14***04 | Ring, Piston Sealing | 1 |
| 14***05 | Ring, Piston Wear | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Drawbar Side Shift Actuator Lines
| 12***H1 | Hose | 1 |
| 12***H1 | Hose | 1 |
| 12***H1 | Hose (See Pg 10-044) | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Drawbar Side Shift Cylinder
| 10***51 | Ring, Clamp | 1 |
| 14***04 | Ring, Piston Sealing | 1 |
| 14***05 | Ring, Piston Wear | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Dual Counterbalance & Relief Valve Drawbar Lift
| 12***H1 | Cartridge, Counterbalance | 2 |
| 12***H1 | Kit, Seal | 1 |
| 12***H1 | Cartridge, Relief Valve | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Dual Counterbalance Valve Articulation & Drawbar Shift
| 12***91 | Valve, Dual Counterbalance | 2 |
| 12***H1 | Cartridge, Counterbalance | 2 |
| 12***H1 | Kit, Seal | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Dual Pilot Check & Relief Valve Scarifier
| 12***91 | Valve, Dual Pilot Check & Relief | 2 |
| 12***H1 | Cartridge, Pilot Check | 2 |
| 12***H1 | Kit, Seal | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Four-Way Swivel Block Moldboard Shift & Power Tilt
| 12***H1 | Seal | 5 |
| 14***87 | Swivel Block, Four-Way | 1 |
| 31***31 | Ring, Retaining | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Hic Valve
| 12***H1 | Plug | 4 |
| 12***92 | Valve, Ihc | 1 |
| 13***00 | Ring, Back-Up | 4 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Hydraulic Oil Filter
| 12***91 | Indicator Assembly | 1 |
| 12***91 | Filter, All Wheel Drive Hydraulic Oil | 1 |
| 12***H1 | Element, Hydraulic Oil Filter (9.5 Inches Long) | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Hydraulic Oil Tank
| 14***62 | Strainer, Suction | 1 |
| 14***23 | Gasket, Tank Cover | 1 |
| 14***91 | Tank, Hydraulic Oil | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Hydraulic Pump Mounting
| 12***H1 | Sleeve, Pump Drive | 1 |
| 22***R1 | O-Ring | 1 |
| 23***R1 | Ring, Retaining | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Hydraulic System Pump
| 12***92 | Pump, Hydraulic | 1 |
| 12***91 | Compensator Assembly | 1 |
| 13***99 | Bearing, Needle | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Junction Block
| 12***92 | Block, Junction | 1 |
| 12***91 | Valve, Lock Pin Solenoid | 1 |
| 12***H1 | Kit, Seal | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Leaning Wheel Cylinder
| 10***51 | Ring, Clamp | 1 |
| 12***91 | Kit, Cylinder Seal | 1 |
| 14***04 | Ring, Piston Sealing | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Lock Pin Cylinder
| 10***55 | Ring, Retaining | 1 |
| 14***04 | Ring, Piston Sealing | 1 |
| 14***05 | Ring, Piston Wear | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Lock Pin Cylinder Actuator Lines
| 12***H1 | Hose | 2 |
| 12***R1 | Clamp, Tube | 2 |
| 24***R1 | Screw | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Lock/Unlock Differential Control & Relief Valve
| 14***91 | Cartridge, Control Valve | 1 |
| 14***91 | Cartridge, Relief Valve | 1 |
| 14***H1 | Coil, Solenoid | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Lock/Unlock Differential Control Valve
| 14***H1 | Coil, Solenoid | 1 |
| 14***91 | Cartridge, Control Valve | 1 |
| 14***91 | Valve, Control | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Lock/Unlock Differential Hydraulic Pump
| 12***94 | Seal, Oil - .5 In. Id, 1.12 In. D, .25 In. W | 0 |
| 14***91 | Pump, Lock/Unlock Differential Hydraulic | 1 |
| 14***H1 | Shaft, Drive | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Lock/Unlock Differential Hydraulic System
| 10***13 | Hose Assembly | 2 |
| 12***H1 | Coupling, Quick Disconnect | 1 |
| 12***H1 | Hose | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Moldboard Float Valve
| 12***H1 | Spring | 2 |
| 12***H1 | Kit, O-Ring | 1 |
| 12***91 | Valve, Moldboard Float | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Moldboard Shift Cylinder
| 10***51 | Ring, Clamp | 1 |
| 12***91 | Kit, Cylinder Seal | 1 |
| 12***91 | Cylinder Weldment | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Moldboard Shift Cylinder Actuator Lines
| 11***42 | Clamp, Tube | 2 |
| 12***82 | Washer, Lock | 4 |
| 12***H1 | Hose | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Moldboard Tilt Cylinder
| 12***91 | Cylinder Weldment | 1 |
| 12***91 | Cylinder Assembly, Moldboard Power Tilt | 2 |
| 14***53 | Rod Weldment, Piston | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Moldboard Tilt Cylinder Actuator Lines
| 11***42 | Clamp, Tube | 2 |
| 12***H1 | Hose | 2 |
| 12***H1 | Hose | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Optional Control Levers Auxiliary
| 12***14 | Washer, Lock | 0 |
| 12***45 | Bearing, Teflon | 2 |
| 12***H1 | Epoxy, General Purpose - 1.2 Oz | 0 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Optional Control Levers Scarifier
| 12***14 | Washer, Lock | 2 |
| 12***45 | Bearing, Teflon | 2 |
| 12***H1 | Epoxy, General Purpose - 1.2 Oz | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Orbitrol Control Unit
| 12***91 | Control Unit, Orbitrol | 1 |
| 12***H1 | Pin, Centering | 1 |
| 12***H1 | Kit, Centering Spring | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Rear Auxiliary Actuator Lines
| 12***H1 | Hose | 1 |
| 12***H1 | Hose | 1 |
| 12***H1 | Spacer, Valve | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Ripper Cylinder Actuator Lines
| 12***H1 | Hose | 2 |
| 12***H1 | Plate, Valve Mounting | 1 |
| 14***71 | Protector | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Scarifier Cylinder
| 10***51 | Ring, Clamp | 1 |
| 11***28 | Piston | 1 |
| 11***30 | Retainer, Piston Seal | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Scarifier Cylinder Actuator Lines
| 12***H1 | Hose | 1 |
| 12***H1 | Hose | 1 |
| 12***H1 | Hose | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Solenoid Valve Cartridge
| 12***91 | Kit, Seal | 1 |
| 12***91 | Cartridge, Valve | 1 |
| 12***91 | Cartridge, Solenoid Valve | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Steering & Brake Pump
| 12***91 | Pump, Steering & Brake | 1 |
| 12***H1 | Washer | 1 |
| 12***H1 | Washer, Thrust | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Steering Cylinder
| 14***58 | Ring, Back-Up | 1 |
| 14***45 | Ring, Piston Sealing | 1 |
| 14***45 | Ring, Piston Wear | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Transfer Case
| 10***71 | Ring, Retaining | 1 |
| 10***38 | Cup, Bearing | 2 |
| 11***50 | Bearing, Ball | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Valve Section Circle Reverse
| 13***01 | Screw, Socket Head | 2 |
| 14***H1 | Cap | 1 |
| 14***H1 | End, Spool | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Valve Section Leaning Wheel
| 13***01 | Screw, Socket Head | 2 |
| 14***H1 | Cap | 1 |
| 14***H1 | End, Spool | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Valve Section Moldboard Tilt
| 13***01 | Screw, Socket Head | 2 |
| 14***H1 | Cap | 1 |
| 14***H1 | End, Spool | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Valve Section Optional - L.H. Bank
| 13***01 | Screw, Socket Head | 2 |
| 14***H1 | Cap | 1 |
| 14***H1 | End, Spool | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Valve Section Optional - R.H. Bank
| 13***01 | Screw, Socket Head | 2 |
| 14***H1 | Cap | 1 |
| 14***H1 | End, Spool | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Hydraulics : Valve Section Scarifier Or Ripper - F1
| 13***01 | Screw, Socket Head | 2 |
| 14***91 | Valve Section | 1 |
| 14***H1 | Cap | 1 |
Instruments
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Instruments : Cab Switch Panel
| 11***C1 | Bar, Buss - 4 Hole | 1 |
| 12***17 | Washer, Shunt Lead To Switch Attaching | 8 |
| 12***91 | Washer, Plain | 4 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Instruments : Console Switch Panel
| 11***C1 | Bar, Buss - 2 Hole | 1 |
| 11***C1 | Bar, Buss - 3 Hole | 1 |
| 11***C1 | Bar, Buss - 4 Hole | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Instruments : Gauge Cluster
| 11***C1 | Voltmeter | 1 |
| 11***C1 | Gauge, Fuel | 1 |
| 12***C1 | Bezel | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Instruments : Steering Console Instrument Panel
| 12***H2 | Diode Board - Bulb Check | 1 |
| 12***H2 | Gauge, Articulation | 1 |
| 12***H1 | Switch, Saddle Pin | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Instruments : Tachometer Installation
| 12***C1 | Sensor, Tachometer | 1 |
| 12***91 | Tachometer, Electric | 1 |
| 12***91 | Tachometer Installation | 1 |
Mounted Equipment
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Mounted Equipment : 1/2 Inch Extension For 3/4 Inch Moldboard For 12 Ft. Moldboard
| 12***91 | Kit, 2' Moldboard Extension - R.H | 1 |
| 12***91 | Kit. 2' Moldboard Extension - L.H | 1 |
| 12***H1 | Extension, Moldboard - R.H | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Mounted Equipment : 1/2 Inch Extension For 7/8 Inch Moldboard For 12 Ft. Or 13 Ft. Moldboard
| 12***91 | Kit, 2 Ft. Moldboard Extension - R.H | 1 |
| 12***91 | Kit, 2 Ft. Moldboard Extension - L.H | 1 |
| 12***H1 | Extension, Moldboard - R.H | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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***H1 | Extension, Moldboard - R.H | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Mounted Equipment : 3/4 Inch Moldboard
| 12***H1 | Edge, Cutting 5/8 In. X 6 In. X 6 Ft. Heat Treated | 0 |
| 12***91 | Moldboard Assembly - 3/4 In. X 22 In. X 12 Ft | 1 |
| 12***91 | Moldboard Weldment - 12 Ft | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Mounted Equipment : 7/8 Inch Moldboard
| 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 6 Ft. Heat Treated | 0 |
| 12***H1 | Edge, Cutting - 5/8 In. X 6 In. X 7 Ft. Heat Treated | 0 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Mounted Equipment : Circle Reverse Gear
| 12***91 | Gear Assembly, Circle Reverse | 1 |
| 14***45 | Plate, Mounting | 1 |
| 14***17 | Gasket | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Mounted Equipment : Circle Reverse Gear Case
| 12***H1 | Seal, Oil | 1 |
| 26***33 | Cup, Bearing | 1 |
| 28*** A | Shim - 0.003 In. (0.076 mm) | 3 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Mounted Equipment : Circle Reverse Gear Case With Slip Clutch
| 12***H1 | Seal, Oil | 1 |
| 14***91 | Gear Case Assembly, Circle Reverse | 1 |
| 26***33 | Cup, Bearing | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Mounted Equipment : Circle Reverse Slip Clutch
| 12***H1 | Plate, Friction | 7 |
| 12***H1 | Plate, Separator | 8 |
| 12***H1 | V-Ring | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Mounted Equipment : Drawbar & Circle
| 10***85 | Pin, Cotter | 2 |
| 10***61 | Fitting, Grease | 8 |
| 10***62 | Fitting, Grease - 90 Degree | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Mounted Equipment : Non-Lube Drawbar & Circle
| 10***85 | Pin, Cotter | 2 |
| 10***62 | Fitting, Grease - 90 Degree | 2 |
| 12***84 | Washer, Lock - 1/2 In | 16 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Mounted Equipment : Power Tilt Moldboard Carrier
| 10***10 | Pin, Cotter | 4 |
| 10***61 | Fitting, Grease | 2 |
| 12***H2 | Wear Pad | 4 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Mounted Equipment : Reversible Overlay End Bit Installation For - 5/8
| 12***91 | End Bit Installation, Reversible Overlay | 1 |
| 12***H1 | Bit, Reversible Overlay End | 2 |
| 33***87 | Washer, Lock | 12 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Mounted Equipment : Ripper Installation
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Mounted Equipment : Scarifier
| 10***61 | Fitting, Grease | 6 |
| 12***99 | Shim - 0.031 In. (0.787 mm) | 20 |
| 12*** A | Shim - 0.015 In. (0.381 mm) | 8 |
Power
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Power : Accelerator/Decelerator Control Linkage
| 12***14 | Washer, Lock | 1 |
| 12***R1 | Washer, Lock - Ground Screw | 5 |
| 12***H2 | Washer, Nylon Bearing | 0 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Power : Air Cleaner
| 12***H1 | Cover Assembly | 1 |
| 12***91 | Air Cleaner | 1 |
| 12***H1 | Element, Outer Air Cleaner | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Power : Air Intake System
| 12***R1 | Washer, Lock - Ground Screw | 2 |
| 12***82 | Washer, Lock | 4 |
| 12***91 | Band Assembly, Air Cleaner | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Power : Exhaust System
| 10***45 | Muffler | 1 |
| 12***82 | Washer, Lock | 2 |
| 14***H1 | Tube, Exhaust | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Power : Floor Plate
| 10***96 | Adhesive, Rubber - 1 Qt. Can | 0 |
| 12***45 | Bearing, Teflon | 2 |
| 12***H1 | Spring, Pedal Return | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Power : Fuel Lines
| 11***45 | Hose | 1 |
| 12***45 | Valve, Shut-Off | 1 |
| 12***80 | Elbow | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Power : Fuel Tank
| 10***96 | Adhesive, Rubber - 1 Qt. Can | 0 |
| 11*** A | Cap, Fuel Tank | 1 |
| 12***37 | Strainer, Fuel | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Power : Governor Control Tube Spring
| 12***91 | Tube Weldment | 1 |
| 12***H1 | Spring | 1 |
| 12***91 | Spring Assembly, Governor Control Tube | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Power : Lockable Oil Fill & Dipstick Installation
| 12***H2 | Cap, Oil Filler | 1 |
| 12***H1 | Bar, Dipstick Lock | 1 |
| 14***H1 | Strap, Dipstick Lock | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Power : Shift Console
| 12***92 | Washer, Flat - 0.25 | 18 |
| 12***H1 | Lever, Throttle Control | 1 |
| 12***H1 | Spacer, Throttle Control | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Power : Throttle Control
| 12***R1 | Washer, Lock - Ground Screw | 2 |
| 12***H1 | Bracket | 1 |
| 12***H2 | Cable, Governor Control | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Power : Turbo Lube
| 11***26 | Adaptor, Reducing | 1 |
| 12***91 | Kit, Turbocharger Lube | 1 |
| 12***H1 | Support | 1 |
Steering
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Steering : Steering Column
| 12***91 | Column, Steering | 1 |
| 14***H1 | Kit, Horn Brush Replacement | 1 |
| 44***56 | Ring, Retaining | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Steering : Steering Console
| 10***59 | Screw, Set | 2 |
| 10***R1 | Ring, Retaining | 4 |
| 11***C1 | Flasher, Turn Signal | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Steering : Steering Console Control Levers
| 10***96 | Adhesive, Rubber - 1 Qt. Can | 0 |
| 12***14 | Washer, Lock | 16 |
| 12***45 | Bearing | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Air Conditioner Compressor Mounting
| 12***14 | Washer, Lock | 1 |
| 12***76 | Nut, Hex | 1 |
| 12***82 | Washer, Lock | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Air Conditioner Lines
| 10***99 | Stud, Weld | 1 |
| 12***14 | Washer, Lock | 6 |
| 12***76 | Nut, Hex | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Blower Assembly
| 14***91 | Motor Assembly | 2 |
| 14***H1 | Housing, Blower | 1 |
| 14***H1 | Motor | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Cab Assembly
| 11***C1 | Bolt, Latch | 2 |
| 12***02 | Grommet, Top Lights | 2 |
| 12***91 | Washer, Plain | 8 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Cab Glass
| 12***H2 | Glass, Rear | 1 |
| 12***H2 | Glass, Side - Top | 2 |
| 12***H2 | Glass, Side - Bottom | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Cab Installation
| 11***85 | Mount, Rubber | 4 |
| 12***H1 | Washer, Special - Rops | 2 |
| 12***H1 | Washer, Special - Rops | 4 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Cab Steps
| 12***H1 | Bracket, Step Mounting - 4.29 In | 8 |
| 12***H1 | Strip, Rubber | 4 |
| 12***91 | Step Weldment, Lower | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Cab Vent
| 12***75 | Nut - Mounting | 8 |
| 12***92 | Washer, Flat - 0.25 | 26 |
| 12***H1 | Bar, Cab Top - R.H | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Defroster Fan Front & Rear
| 11***C1 | Blade, Fan | 1 |
| 11***C1 | Washer, Flat | 4 |
| 11***C1 | Motor, Fan | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Enclosed Cab Door - L.H.
| 10***62 | Pin, Cotter | 4 |
| 11***83 | Clevis | 3 |
| 12***91 | Washer, Plain | 8 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Enclosed Cab Door - R.H.
| 10***62 | Pin, Cotter | 4 |
| 11***83 | Clevis | 3 |
| 12***91 | Washer, Plain | 8 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Front & Rear Wiper Installation Pantograph Arm
| 12***92 | Washer, Flat - 0.25 | 2 |
| 12***H1 | Arm, Wiper | 2 |
| 12***H1 | Blade, Wiper | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Front & Rear Wiper Installation Straight Arm
| 12***H1 | Blade, Wiper | 2 |
| 12***H1 | Arm, Wiper | 2 |
| 12***H1 | Spacer | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Heater Assembly
| 10***95 | Plub, Button | 1 |
| 12***82 | Washer, Lock | 2 |
| 12***94 | Washer, Plain | 3 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Heater Control
| 12***91 | Clip, Closed | 6 |
| 12***H1 | Cable, Heater Control (See Pg 13-068) | 0 |
| 12***H1 | Bracket, Valve | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Heater Control Valve
| 12***91 | Valve Assembly, Heater Control | 1 |
| 14***H1 | Valve, Heater | 1 |
| 14***H1 | Bracket, Cable | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Heater Hose Installation
| 10***99 | Stud, Weld | 1 |
| 11***98 | Elbow - 90? | 1 |
| 12***91 | Clip, Closed | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Heater Installation
| 10***96 | Adhesive, Rubber - 1 Qt. Can | 1 |
| 12***92 | Washer, Flat - 0.25 | 5 |
| 12***H1 | Gasket, Heater | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Hinged Lower Front Window
| 11***C1 | Grommet, Rubber | 4 |
| 12***92 | Window, Hinged - L.H | 1 |
| 12***92 | Window, Hinged - R.H | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Hinged Lower Front Window Installation
| 12***61 | Nut, Hex - No. 10-24 | 20 |
| 12***91 | Washer, Plain | 36 |
| 12***92 | Washer, Flat - 0.25 | 4 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Hood Side
| 11***07 | Washer, Lock | 3 |
| 12***14 | Washer, Lock | 4 |
| 12***R1 | Washer, Lock - Ground Screw | 8 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Hood Top
| 12***H1 | Support - R.H. - Optional | 1 |
| 12***H1 | Hold, Hand | 1 |
| 14***92 | Hood Weldment | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : 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 : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Lower Front Wiper Installation
| 12***61 | Nut, Hex - No. 10-24 | 4 |
| 12***75 | Nut - Mounting | 4 |
| 12***91 | Washer, Plain | 8 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Mirror Installation West Coast
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Operators Seat Complete Assembly
| 11***C1 | Bracket - L.H | 1 |
| 11***C1 | Bracket - R.H | 1 |
| 11***C1 | Bolt, Tilt Back | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Sound Insulation & Floor Mats
| 12***92 | Washer, Flat - 0.25 | 8 |
| 12***94 | Washer, Plain | 2 |
| 12***91 | Cover, Front Wipers | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Standard Seat Mounting
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Suspension Seat Lower Suspension
| 11***C1 | Pad, Spring | 1 |
| 11***C1 | Spring, Weight Adjustment | 1 |
| 11***C1 | Washer, Spring | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Suspension Seat Mounting
| 11***91 | Belt, Seat | 1 |
| 12***91 | Seat Installation, Suspension | 1 |
| 28***R1 | Washer, Hardened - 3/8 In | 4 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Suspension Seat Seat Adjuster
| 11***C1 | Latch - L.H | 1 |
| 11***C1 | Latch - R.H | 1 |
| 11***C1 | Rod, Latch | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Trim Group
| 12***82 | Washer, Lock | 10 |
| 12***94 | Washer, Plain | 10 |
| 12***H1 | Support - R.H. - Optional | 8 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Under Seat Air Conditioner/Heater Evaporator
| 12***H1 | Grill, Heater Outlet | 1 |
| 14***H1 | Housing | 1 |
| 14***H1 | Cover | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Window Washer Installation Front & Rear
| 12***92 | Washer, Flat - 0.25 | 2 |
| 12***H1 | Nozzle, Jet | 2 |
| 12***H1 | Clip, Hose | 2 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Windshield Washer Installation Lower Front Windows
| 12***H1 | Clip, Hose | 2 |
| 12***H1 | Pump, Windshield Washer | 1 |
| 12***H1 | Valve, Check | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Wiper Motor Pantograph Arm
| 12***H1 | Motor, Wiper | 1 |
| 12***H1 | Ball, Pivot | 1 |
| 12***H1 | Crank, Motor | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Wiper Motor Straight Arm
| 12***H1 | Motor, Wiper | 1 |
| 12***H1 | Ball, Pivot | 1 |
| 12***H1 | Crank, Motor | 1 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Superstructure : Wiper Slave Pivot Kit
| 12***91 | Kit, Wiper Slave Pivot | 2 |
| 12***H1 | Gasket, Slave Pivot | 1 |
| 12***H1 | Washer, Lock | 1 |
Suspension
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Suspension : Awd Front Axle
| 10***90 | Nut, Hex | 12 |
| 10***89 | Pin, Cotter | 3 |
| 10***61 | Fitting, Grease | 10 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Suspension : Awd Gear Box
| 10***24 | Bolt | 3 |
| 11***59 | O-Ring | 1 |
| 12***76 | Screw, Self-Locking | 8 |
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Suspension : Front Axle
| 10***90 | Nut, Hex | 8 |
| 10***89 | Pin, Cotter | 4 |
| 10***61 | Fitting, Grease | 10 |
Wheels And Traction
Komatsu : Gd530a-1/Aw-1(S/N 200840-201999) : Wheels And Traction : Wheels & Rims
| 10***90 | Nut, Hex | 32 |
| 10***65 | Tire & Rim Assembly - 14.00 X 24-12pr | 6 |
| 11***48 | Clamp, Rim | 32 |
Frequently asked questions
What engine powers the Komatsu GD530A-1/AW-1 (S/N 200840-201999)?
It carries the KDC610T engine badge, cross-referenced to the Komatsu S6D102-1/S6D102E-1 six-cylinder diesel family. It is mechanically governed with no ECM or stored fault codes on this serial range. Confirmed horsepower and displacement are not documented for this exact serial range; verify against your machine's engine tag.
What is the operating weight of the Komatsu GD530A-1/AW-1 (S/N 200840-201999)?
Not documented for this exact serial range. Later GD530A/AW-2-series graders in the same family run roughly 12,700 to 13,900 kg (28,000 to 30,600 lb) depending on configuration, which is a useful class reference only. Confirm curb weight from your specific machine's dataplate.
What replaced the Komatsu GD530A-1/AW-1 (S/N 200840-201999)?
It was succeeded by the GD530A/AW-2A/2B/2C, S/N 202,002 and up, still built on the S6D102 engine, then the -2B/2C variant on the S6D102E engine from S/N 203,163-up, and later the -2EY variant from S/N 210,098-up.
What GD530A-1/AW-1(S/N 200840-201999) owners discuss
What engine does the GD530A-1/AW-1 (S/N 200840-201999) actually run, and is it a Komatsu or a Cummins?
This early Komatsu-Dresser series carries the joint-venture engine tag KDC610T, cross-referenced in factory parts documentation to the S6D102-1 / S6D102E-1 diesel. Treat it as a turbocharged in-line six built under the Komatsu-Dresser joint venture rather than a later genuine-Komatsu S6D102 out of a PC200 or WA320. The fuel system is mechanical (inline or rotary injection pump, no ECM). Owners note the internals don't always cross with later genuine-Komatsu S6D102 parts, and some Komatsu-Dresser era machines of this vintage share components with Cummins-based joint-venture engines. Confirm the exact engine tag and serial stamped on the block dataplate before ordering injectors, pumps, or turbo parts - catalogs mix up the two families constantly.
What's the common complaint about the transmission and torque converter on this grader?
Like most powershift-and-torque-converter Komatsu-family machines of this era, the recurring gripe is converter slip and heat soak under sustained heavy blade load, usually traced to a sticking bypass or lockup valve. The fix owners report is almost always the same: drop the pan, cut the filter open, and look for clutch-pack debris or a worn stator before assuming the converter itself is shot. Gear count and shift pattern vary by configuration/series within the Komatsu-Dresser grader lineup, so don't assume this exact machine matches spec sheets published for the later A-2 or A-2C update. If it's running hot or slipping under load, have your dealer verify charge pressure and clutch modulation before any rebuild.
What wears out first on the circle and moldboard on these older Komatsu-Dresser graders?
Consensus among grader mechanics holds regardless of brand or era: circle guide shoes, the blade slide rails, and the lift-cylinder pins go first, and a loose circle shows up as chatter and inconsistent grade before anything else fails. A machine this old was built before the dry-film moly spray lube used on later G-series circles, so it's grease-lubricated - buildup of dirty grease accelerates guide-shoe wear if service intervals slipped. Cutting edges wear unevenly and cup in the center under rock; that's normal wear, not a defect. Check circle play, lift-cylinder play, and moldboard slide play daily like any grader.
Is blade or articulation drift normal, or a sign of a real hydraulic problem?
Some settling under a raised blade is expected, but persistent drift on lift, tip, circle shift, articulation, or wheel-lean cylinders on this era of Komatsu-Dresser grader usually points to a failed anti-drift check valve at the cylinder, not the pump. Owners isolate the fault by working one function at a time and watching for creep with the engine off and pressure bled down. Because uncommanded blade drop or articulation creep is a safety issue around ground crews and on grade, have your dealer verify the anti-drift check valves and cylinder seals before returning the machine to service.
What electrical gremlins show up most on this grader?
This series predates electronic engine controls, so the electrical system is simple by modern standards: charging, starting, a cold-start aid, and mechanical gauge sending units. Reported nuisances are typical old-iron issues - corroded gauge sending-unit grounds giving false temperature or pressure readings, a tired starter solenoid on cold mornings, and worn wiring-harness connectors at the rear frame pivot from years of articulation flex. None of it involves fault codes or a diagnostic computer; it's multimeter and wiring-diagram work. Sourcing factory-correct switches and sending units is the bigger headache than the diagnosis itself on a machine this old.
What's the brake-system consensus for this grader?
These run wet multi-disc brakes on the rear tandem, charged off the same hydraulic system as the transmission. The pattern owners report is a soft or fading pedal from low charge pressure or worn discs, rarely a single blown line. Because brake performance on a grader this size is safety-critical, especially on grade or with a loaded blade, have your dealer verify charge pressure and disc wear rather than just topping off fluid and calling it fixed.
What should I check before buying a used GD530A-1/AW-1 (S/N 200840-201999)?
First confirm the serial actually falls in the 200840-201999 range stamped on the frame - the GD530 name was reused across several engine and hydraulics generations, and parts and specs don't cross over cleanly between them. Beyond that it's the same list every grader buyer runs: circle and moldboard slide play, lift/tip/articulation/lean cylinder drift, converter slip and shift quality under load, wet-brake pedal feel, engine smoke, and oil/coolant/hydraulic leaks, plus wheel-lean pin and bearing wear. Ask for service records - on a machine this old, a documented history of circle lubrication, converter service, and hydraulic filter changes matters more than the hour-meter reading alone, since meters on machines this age are frequently replaced or unreliable.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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