Komatsumotor grader(no series)
Komatsu GD305A-1A(S/N 6734-UP)
Maintenance schedule, common problems & OEM parts breakdown
The GD305A-1A is a mid-size mechanical-era motor grader in Komatsu's A-series line, built for road and site grading work in the roughly 8-tonne operating weight class. It carries the Komatsu 6D95L-1 family engine, an inline-6 water-cooled direct-injection diesel of about 4.9 liters, rated near 63.3 kW (86 PS) at 2500 rpm through purely mechanical fuel injection with no engine control unit. Operating weight runs about 7950 kg (17,530 lb) in this configuration, with an overall length of 6815 mm (22 ft 4 in), width of 2100 mm (6 ft 11 in), height of 2965 mm (9 ft 9 in), a 4900 mm (16 ft 1 in) wheelbase, and a 2843 mm (9 ft 4 in) moldboard. The GD305A-1A designation marks a running-production update within the broader GD305A-1 line, carrying the standard blade and grading equipment typical of the series.
S/N 6734-UP picks up immediately after the preceding GD305A-1 production block (S/N 6001-6733) under the same base designation, and the engine itself carries a running change to the 6D95L-1HH suffix later in this serial range, a factory revision rather than a different machine. The commonly listed GD305A-3 is a separate, later generation built around Komatsu's S4D102E four-cylinder engine with different operating weight and dimensions; it is not interchangeable with this machine's parts or specs. In the used and parts market, the GD305A-1A matters because it represents one of Komatsu's last fully mechanical grader generations before electronic engine controls, valued for simple field diagnostics and rebuildable mechanical systems, but increasingly dependent on correct serial-range identification to source the right injection pump, transmission, and final-drive parts.
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 GD305A-1A(S/N 6734-UP) specifications
Engine
| Engine model | Komatsu 6D95L-1 (running-change suffix -1HH applies from this serial break; earlier S/N 6001-6733 units carried suffix -1DD-M on the same base engine) |
| Type | 4-cycle, water-cooled, inline 6-cylinder direct-injection diesel |
| Displacement | approx. 4.9 L (bore 95 mm x stroke 115 mm) |
| Rated power (gross) | 63.3 kW (86 PS) at 2,500 rpm, per factory spec sheet |
| Emissions tier | Mechanical diesel, pre-dates modern emissions tiers - no EPA/EU tier certification applies to this generation |
Weights
| Operating weight | approx. 7,950 kg (17,530 lb), standard configuration |
Dimensions
| Overall length | 6,815 mm (22 ft 4 in) |
| Overall width | 2,100 mm (6 ft 11 in) |
| Overall height | 2,965 mm (9 ft 9 in) |
| Wheelbase | 4,900 mm (16 ft 1 in) |
| Moldboard (blade) width | 2,843 mm (9 ft 4 in) |
| Moldboard height | 500 mm (19.7 in) |
Performance
| Moldboard type | Box-section, single-side offset moldboard, factory standard on this configuration |
| Travel speed | Not documented for this exact serial range in available factory literature - verify with your dealer |
| Gradeability | Not published for this configuration |
Service capacities (summary)
| Fuel tank | Not documented for this exact serial range in available literature - verify with your dealer |
| Hydraulic system | Not documented for this exact serial range in available literature - verify with your dealer |
| Engine oil | Not documented for this exact serial range in available literature - verify with your dealer |
| Cooling system | Not documented for this exact serial range in available literature - verify with your dealer |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
GD305A-1A(S/N 6734-UP) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with oil filter) | Exact refill figure for this serial range not confirmed in available sources; the 6D95L-1HH engine family fitted to this grader typically holds in the range of 16.5 to 19.5 L (4.4 to 5.2 US gal) drain-and-refill with filter change. Verify against the OMM decal or dealer before servicing. | Komatsu genuine engine oil (EO), grade selected by ambient temperature per the OMM chart: SAE 10W-30 for cold climates, SAE 15W-40 for moderate to warm climates. Use an API CH-4/CI-4 diesel engine oil if genuine Komatsu EO is unavailable. |
| Cooling system (radiator + engine block) | Not confirmed for this exact serial range in available public sources. Comparable Komatsu graders in this engine/frame class run roughly 20 to 28 L (5.3 to 7.4 US gal); treat as an estimate only and confirm with the OMM or dealer. | Komatsu genuine Supercoolant AF-NAC, premixed or diluted per label. Protects aluminum and iron cooling components from corrosion, cavitation erosion, and scale. Replace on the OMM interval (commonly every 2 years or 4,000 hours). |
| Fuel tank | Not confirmed specifically for the 6734-UP serial range. A same-class Komatsu grader sharing the 6D95L engine lists roughly 227 L (60 US gal); the GD305A-1A figure may differ by configuration. Confirm with the OMM. | Diesel fuel meeting Komatsu's specified cetane and sulfur limits; use a winter-grade blend in cold climates to prevent gelling. Keep tank full at end of shift to limit condensation. |
| Power train case (transmission / bevel gear / differential, combined reservoir) | Not confirmed for this serial range in available sources. Verify against the OMM refill table; capacity varies by transmission configuration. | Komatsu genuine powertrain oil (TO series), viscosity selected by ambient temperature per the OMM chart (e.g., TO10 for cold weather, TO30 for warmer conditions). |
| Tandem final drive case, each side | Not confirmed for this serial range in available sources. Komatsu tandem cases on graders of this class typically run a modest per-side figure documented only in the OMM refill table; confirm before servicing. | Komatsu genuine powertrain oil (TO series) or axle oil (AXO series) per the OMM designation for this compartment, graded by ambient temperature. |
| Circle drive case | Not confirmed for this serial range in available sources; consult the OMM refill table. | Komatsu genuine powertrain oil (TO series), same grade guidance as the power train case. |
| Hydraulic tank | Not confirmed specifically for this serial range. Consult the OMM refill table; figure varies by circuit configuration (blade, articulation, scarifier options). | |
| Hydraulic system total (tank plus lines and cylinders) | Not confirmed specifically for this serial range; the OMM lists a system-total figure larger than the tank-only refill amount. Confirm with the OMM or dealer. | Komatsu genuine hydraulic oil (HO series), grade selected by ambient temperature per the OMM chart (e.g., HO46-HM for general service, HO56-HE where a lighter cold-weather grade is called for). |
| Front wheel bearings / axle | Grease-packed; no fluid-fill volume specified in available sources. | Komatsu genuine multipurpose grease per the OMM grease spec, applied at scheduled greasing intervals. |
| Grease (chassis lubrication points, spec only) | Not applicable — applied via grease fittings per the OMM lubrication chart, not a fill volume. | Komatsu genuine multipurpose chassis grease (lithium-based EP grease), consistent with Komatsu's standard grease spec used across its equipment line. Confirm NLGI grade in the OMM for extreme temperature service. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu GD305A-1A(S/N 6734-UP) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
Servicing the GD305A-1A(S/N 6734-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Run engine oil analysis every service interval to catch mechanical injection pump wear metals early, this grader carries no ECU, so oil sampling and fuel condition are the main predictive tools. Drain fuel tank water and sediment often; contaminated fuel accelerates injection pump and injector wear, the leading failure mode on 6D95L-1 mechanical fuel systems. Sample tandem case and circle-turn hydraulic oil for water intrusion or metal fines, since gear-oil seepage at the tandem final drives is a known issue on this block.
Corrective & Common Repairs
Expect circle-turn wear that shows up as sloppy blade control or drift under load; inspect the circle gear, shoes, and wear strips before hydraulic symptoms mask a mechanical problem. Tandem final drive seals seep gear oil on this block; check case level and housing seams at every service. Charging and glow-plug wiring corrode over time; with no ECU, a slow crank or weak charge points to wiring, not a sensor fault. Moldboard slide rails and the drawbar ball wear and loosen fine-grade accuracy; shim or replace before backlash grows.
Overhaul & Rebuild Points
Major rebuild points center on the mechanical drivetrain: power-shift transmission and torque converter components wear steadily and should be inspected as a set at overhaul, not piecemeal. Circle gear and shoes typically need a full rebuild alongside the drawbar ball once backlash exceeds adjustment range. The mechanical injection pump and injectors warrant bench overhaul once fuel contamination has scored internal components. Wheel-lean and blade lift cylinders should be resealed and their pins and bushings replaced together, since one worn joint accelerates wear on the rest of the linkage.
Seasonal & Environment Servicing
Cold-weather starts stress the charging and glow-plug circuit hardest; clean and check every connection before winter, since corrosion here reads as a hard-start problem with no fault code to point to it. Check AF-NAC coolant concentration each season change to match ambient temperature. In wet or humid conditions, drain fuel tank water more often to protect the mechanical injection pump from contamination. In dusty or abrasive ground conditions, grease the circle, drawbar, and moldboard slide rails more frequently than the standard interval to offset accelerated slide and circle-shoe wear.
GD305A-1A(S/N 6734-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 09637-30163 | Plate? Instruction,Air Cleaner (Single Element) | Air intake service | Check fitment → |
| 232-843-1430 | Filter Ass'Y,Air | Air intake service | Check fitment → |
| 07000-02135 | O-Ring,Hydraulic Oil Filter | Hydraulic service | Check fitment → |
| 6204-61-5190 | Gasket,Oil Cooler Element | Lubrication service | Check fitment → |
| 600-211-6241 | Cartridge,Engine Oil Filter (D31s) | Lubrication service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
GD305A-1A(S/N 6734-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| Charge lamp (battery/alternator symbol, red) | Alternator not charging or charging circuit fault | Loose or broken fan/alternator belt, faulty alternator, or wiring/connector fault in the charging circuit | Stop and check belt tension/condition first, then test alternator output and battery connections before restarting |
| Engine oil pressure lamp (red, oil can symbol) | Engine lubrication oil pressure below safe minimum | Low oil level, clogged oil filter, worn oil pump, or a failed pressure sender/switch | Shut engine down immediately, check oil level and filter condition before restarting |
| Coolant temperature lamp (red, thermometer symbol) | Engine coolant temperature above safe operating range | Low coolant level, clogged radiator core, slipping/broken fan belt, or thermostat stuck closed | Idle down, let engine cool, check coolant level and radiator/fan belt before resuming work |
| Air cleaner restriction indicator | Intake air filter element is clogged, restricting airflow to the engine | Dust/debris loading of the air cleaner element in dusty grading conditions | Inspect and clean or replace the air cleaner element per the service interval |
| Torque converter oil temperature lamp | Transmission/torque converter oil temperature above safe operating range | Low transmission oil level, clogged oil cooler, or prolonged high-load operation (heavy stall conditions) | Reduce load, let the converter oil cool, then check fluid level and cooler for restriction |
| Hydraulic oil filter restriction indicator | Hydraulic return filter is loading up, restricting oil flow | Filter element due for service or contaminated hydraulic oil | Replace the hydraulic filter element and check oil condition |
| Parking brake indicator lamp | Parking brake is engaged | Operator engaged the parking brake, or brake linkage/switch out of adjustment | Confirm parking brake lever position and check switch/linkage adjustment if lamp state disagrees with lever position |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
GD305A-1A(S/N 6734-UP) attachments & work tools
Moldboard / main blade
Curved moldboard mounted on the circle, roughly 3.1 to 3.7m (10 to 12 ft) wide depending on configuration, with a height in the 50 to 55cm range typical of this mid-size grader class. Fitted with bolt-on cutting edges and end bits that take the wear instead of the moldboard itself.
Cutting edges and end bits
Replaceable wear strips bolted along the moldboard bottom edge, standard and heavy-duty (through-hardened) grades offered for this class. End bits protect the moldboard tips from side-cast wear and are replaced independently of the main edge.
Front scarifier
Optional tooth bar hung from the front lift/A-frame group ahead of the front axle, used for light surface scarifying. Shares the grader's existing front lift hydraulics, so no extra hydraulic kit is needed, but depth control and visibility are more limited than a rear-mounted tool.
Mid-mounted scarifier
Optional scarifier frame located between the front axle and the tandem, carrying multiple shanks with replaceable points at a spacing chosen for the job. Used for surface break-up ahead of blading rather than deep ripping.
Rear ripper / scarifier assembly
Optional rear-mounted frame that swaps between a small number of ripper shanks for deep ripping or a wider set of scarifier shanks for surface break-up. Mounted behind the tandem so ripping load transfers through the drive tires; runs off the grader's rear hydraulic circuit.
Circle, drawbar and blade positioning
The moldboard rides on a drawbar-mounted circle capable of full 360-degree rotation, with hydraulic blade lift, tilt, and side-shift. This drawbar-circle-moldboard assembly is the grader's own mounting system for the blade rather than a third-party quick-coupler.
Moldboard extensions
Bolt-on end extensions (roughly 0.5 to 0.6m per side) are offered on graders in this class to widen the effective blade width for windrowing or ditch work without changing the base moldboard.
Snow removal package
A side-mounted snow wing (mast type for deep drifted snow, or mastless/low-profile type for benching and shoulder work) can supplement the main moldboard on graders in this weight class, paired with winter-tread tires. Availability varies by dealer configuration — verify with your dealer for this exact serial range.
Tires
Radial tires sized for this operating-weight class are standard, with rock-service or all-terrain tread options offered where the machine works on abrasive or unimproved surfaces. Winter tread is offered as part of a snow package.
Guarding and cab protection options
ROPS/FOPS-rated cab or canopy, cab glass screens, and rock/debris guards for the radiator and underside are common factory or dealer-fit options on this grader class, protecting the operator and cooling package in ripping, quarry, or forestry-adjacent work.
All GD305A-1A(S/N 6734-UP) assemblies by section
Every catalogued assembly group for the Komatsu GD305A-1A(S/N 6734-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
6d95l-1hh Engine S/N 96999-Up
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Air Cleaner(#102941-)
| 04***10 | Ring,See Fig. K4010-65a0 | 1 |
| 08***01 | Indicator,Dust (Japanese-English) | 1 |
| 60***11 | Washer,Seal (K26) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Air Intake(#102941-)
| 01***30 | Screw | 10 |
| 01***70 | Bolt | 4 |
| 01***85 | Bolt | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Alternator (25a) (Inner Parts)(#102941-)
| 60***30 | Alternator A. (25a),(With Non Hardening Pulley) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***11 | Rear Bracket Ass'Y | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Alternator (35a) (Inner Parts)(#102941-150297)
| 60***20 | Alternator A. (35a) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***80 | Collar | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Alternator (35a) (Inner Parts)(#150298-)
| 60***40 | Alternator A. (35a),(With Hardening Pulley) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***80 | Collar | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Alternator (75a) (Inner Parts)(#102941-)
| 60***40 | Alternator A. (75a),(With Non Hardening Pulley) | 1 |
| SD***X0 | Coil Assembly | 1 |
| SD***X0 | Bracket, Rear | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Alternator Mounting (25a)(#102941-)
| 01***30 | Bolt,(For Trimming Dozer) | 1 |
| 01***25 | Bolt,(With Corrosion Resistor) | 3 |
| 01***55 | Bolt,(With Engine Stop Motor Type) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Alternator Mounting (35a)(#102948-)
| 01***30 | Bolt | 1 |
| 01***25 | Bolt,(With Corrosion Resistor) | 3 |
| 01***55 | Bolt,(With Engine Stop Motor Type) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Alternator Mounting (75a)(#102941-)
| 01***30 | Bolt,(For Trimming Dozer) | 1 |
| 01***25 | Bolt,(With Corrosion Resistor) | 3 |
| 01***95 | Bolt | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Camshaft And Tappet(#102941-)
| 01***20 | Screw | 2 |
| 04***16 | Fitting Wedge | 1 |
| 62***10 | Tappet | 12 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Cooling Fan(#102941-)
| 01***30 | Bolt,(Water Separator Spec.) | 6 |
| 01***20 | Bolt,(For Japan Pc200) | 6 |
| 01***16 | Washer,(With Water Separator) | 6 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Corrosion Resistor(#102941-)
| 01***40 | Bolt | 2 |
| 01***65 | Bolt,(With Water Separator) | 2 |
| 01***85 | Bolt | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Crank Pulley(#102941-)
| 01***45 | Bolt,Nylock | 1 |
| 61***20 | Collar,Taper | 1 |
| 61***31 | Plate | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Crankshaft(#102941-)
| 62***00 | Main Metal Ass'Y | 7 |
| 62***00 | Thrust Metal Ass'Y | 1 |
| 62***00 | Main Metal Ass'Y | 7 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Cylinder Block (Tropical Spec.)(#102941-)
| 04***20 | Pin,Dowel (Welded) | 2 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
| 04***08 | Adapter Sleeves | 6 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Cylinder Block Gasket Kit(#102941-)
| 01***12 | Washer,Lock? Injection Gear | 1 |
| 01***16 | Washer,Lock? Injection Gear | 1 |
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Cylinder Block(#102941-)
| 04***20 | Pin,Dowel (Welded) | 2 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
| 04***08 | Adapter Sleeves | 6 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Cylinder Head Gasket Kit(#102941-)
| 07***40 | O-Ring,Water Pump Mount | 1 |
| 07***18 | O-Ring,Turbocharger Lubricating Pipe | 1 |
| 08***14 | Band,(For Additional Fuel Strainer) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Cylinder Head(#102941-)
| 01***32 | Washer, (Without Emergency Steering) | 25 |
| 02***04 | Plug, Pipe | 1 |
| 07***08 | Plug, Expansion | 6 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Damper
| 01***16 | Bolt,(With Alternator Cover Type) | 6 |
| 62***00 | Damper,(Except Japan Pc200) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Exhaust Manifold
| 01***25 | Grub Screw | 4 |
| 01***45 | Bolt, Bracket Mounting | 12 |
| 61***50 | Nut | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Flywheel Housing(#102941-)
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 11 |
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
| 07***15 | Plug,(Used When Without Heater) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Flywheel(#102941-)
| 01***30 | Bolt | 6 |
| 61***61 | Washer, Plain (14mm) | 6 |
| 62***32 | Flywheel Ass'Y | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Front Cover(#102941-)
| 01***16 | Bolt | 2 |
| 01***16 | Screw | 2 |
| 01***55 | Bolt,(With Engine Stop Motor Type) | 13 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Front Hanger(#102941-)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 62***30 | Hanger,Front (W/O Corrosion Resistor) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Filter And Piping(#102941-)
| 01***85 | Bolt | 2 |
| 07***12 | Gasket,Mechanical Pump Piping | 1 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump (Feed Pump) (Inner Parts)(#102941-165052)
| DK***20 | Bolt, Joint | 1 |
| DK***00 | Valve,Check | 2 |
| DK***10 | Feed Pump Ass'Y,(Not Shown) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump (Feed Pump) (Inner Parts)(#165053-)
| DK***20 | Bolt, Joint | 1 |
| DK***00 | Valve,Check | 2 |
| DK***10 | Feed Pump Ass'Y,(Not Shown) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump (Feed Pump) (With Stop Motor) (100ps Spec.) (Inner Parts)(#166273-)
| DK***20 | Bolt, Joint | 1 |
| DK***00 | Valve,Check | 2 |
| DK***10 | Feed Pump Ass'Y,(Not Shown) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump (Feed Pump) (Without Stop Motor) (100ps Spec.) (Inner Parts)(#166273-)
| DK***20 | Bolt, Joint | 1 |
| DK***00 | Valve,Check | 2 |
| DK***10 | Feed Pump Ass'Y,(Not Shown) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump (Governor) (1/2) (Inner Parts)(#102941-165052)
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
| DK***00 | Adapter | 1 |
| DK***80 | Nut | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump (Governor) (1/2) (Inner Parts)(#165053-)
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
| DK***00 | Adapter | 1 |
| DK***20 | Capsule,Spring | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump (Governor) (1/2) (With Stop Motor) (100ps Spec.) (Inner Parts)(#166273-)
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
| DK***00 | Adapter | 1 |
| DK***80 | Nut | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump (Governor) (1/2) (Without Stop Motor) (100ps Spec.) (Inner Parts)(#166273-)
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
| DK***00 | Adapter | 1 |
| DK***80 | Nut | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump (Governor) (2/2) (Inner Parts)(#102941-165052)
| DK***40 | Gasket,Air Compressor | 2 |
| DK***00 | Nut,Cap | 1 |
| DK***20 | Cover | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump (Governor) (2/2) (Inner Parts)(#165053-)
| DK***40 | Gasket,Air Compressor | 2 |
| DK***00 | Nut,Cap | 1 |
| DK***00 | Bushing | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump (Governor) (2/2) (With Stop Motor) (100ps Spec.) (Inner Parts)(#166273-)
| DK***40 | Gasket,Air Compressor | 2 |
| DK***00 | Nut,Cap | 1 |
| DK***00 | Bushing | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump (Governor) (2/2) (Without Stop Motor) (100ps Spec.) (Inner Parts)(#166273-)
| DK***40 | Gasket,Air Compressor | 2 |
| DK***00 | Nut,Cap | 1 |
| DK***20 | Cover | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump (Pump) (1/2) (Inner Parts)(#102941-165052)
| 62***20 | Injection Pump Ass'Y | 1 |
| DK***30 | Key,Woodruff | 1 |
| DK***30 | Bearing | 0 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump (Pump) (1/2) (Inner Parts)(#165053-)
| 62***21 | Injection Pump Ass'Y | 1 |
| DK***30 | Key,Woodruff | 1 |
| DK***30 | Bearing | 0 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump (Pump) (1/2) (With Stop Motor) (100ps Spec.) (Inner Parts)(#166273-)
| 62***12 | Injection Pump Ass'Y | 1 |
| DK***30 | Key,Woodruff | 1 |
| DK***30 | Bearing | 0 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump (Pump) (1/2) (Without Stop Motor) (100ps Spec.) (Inner Parts)(#166273-)
| 62***11 | Injection Pump Ass'Y | 1 |
| DK***30 | Key,Woodruff | 1 |
| DK***30 | Bearing | 0 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump (Pump) (2/2) (Inner Parts)(#102941-165052)
| DK***40 | Shim? 0.50mm, Shim, 0.50mm; Was Dk029311-0040 | 0 |
| DK***90 | Shim? 0.25mm, Shim, 0.25mm; Was Dk029311-0590 | 0 |
| DK***00 | Sleeve,Control | 6 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump (Pump) (2/2) (Inner Parts)(#165053-)
| DK***40 | Shim? 0.50mm, Shim, 0.50mm; Was Dk029311-0040 | 0 |
| DK***90 | Shim? 0.25mm, Shim, 0.25mm; Was Dk029311-0590 | 0 |
| DK***00 | Sleeve,Control | 6 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump (Pump) (2/2) (With Stop Motor) (100ps Spec.) (Inner Parts)(#166273-)
| DK***40 | Shim? 0.50mm, Shim, 0.50mm; Was Dk029311-0040 | 0 |
| DK***90 | Shim? 0.25mm, Shim, 0.25mm; Was Dk029311-0590 | 0 |
| DK***00 | Sleeve,Control | 6 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump (Pump) (2/2) (Without Stop Motor) (100ps Spec.) (Inner Parts)(#166273-)
| DK***40 | Shim? 0.50mm, Shim, 0.50mm; Was Dk029311-0040 | 0 |
| DK***90 | Shim? 0.25mm, Shim, 0.25mm; Was Dk029311-0590 | 0 |
| DK***00 | Sleeve,Control | 6 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump Lubricator
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 2 |
| 07***10 | Screw, Banjo Connector (M10-1.25x20) | 1 |
| 62***30 | Pipe,Oil | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump Mounting (With Stop Motor) (100ps Spec.)(#166273-)
| 01***35 | Stud | 4 |
| 01***12 | Bolt,(See Fig.0501) | 1 |
| 01***16 | Bolt,(With Alternator Cover Type) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump Mounting (Without Stop Motor) (100ps Spec.)(#166273-)
| 01***35 | Stud | 4 |
| 01***12 | Bolt,(See Fig.0501) | 1 |
| 01***16 | Bolt,(With Alternator Cover Type) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump Mounting(#102941-165052)
| 01***35 | Grub Screw | 4 |
| 01***12 | Bolt,(See Fig.0501) | 1 |
| 01***16 | Bolt,(With Alternator Cover Type) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Injection Pump Mounting(#165053-)
| 01***35 | Stud | 4 |
| 01***12 | Bolt,(See Fig.0501) | 1 |
| 01***16 | Bolt,(With Alternator Cover Type) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Fuel Return(#102941-)
| 07***95 | Tube,Spill | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Head Cover(#102941-)
| 61***10 | Cap, Oil Filler | 1 |
| 61***20 | Screw | 4 |
| 61***30 | Washer,(B) | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Heater Signal(#102941-)
| 60***30 | Signal,Engine Pre Heater | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Heater Switch
| 01***12 | Bolt | 2 |
| 01***20 | Bolt,(For Japan Pc200) | 2 |
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Holder (Inner Parts)(#102941-)
| 62***10 | Holder Ass'Y | 6 |
| DK***00 | Shim? 0.75mm | 0 |
| DK***00 | Shim? 1.200mm | 0 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Idler Gear(#102941-)
| 01***70 | Bolt,(For 75a Alternator) | 1 |
| 04***12 | Pin,Spring (See Fig.0201) | 1 |
| 62***31 | Shank | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Injection Nozzle(#102941-)
| 01***35 | Bolt, Mount Bracket To Floor | 6 |
| 07***00 | Clip | 11 |
| 62***10 | Carrier | 6 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Injection Piping
| 01***25 | Screw | 4 |
| 61***30 | Clip | 1 |
| 62***00 | Clip Ass'Y | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Muffler(#102941-)
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 2 |
| 01***65 | Bolt, Mount Tube To Divider Valve | 1 |
| 01***25 | Bolt,(With Corrosion Resistor) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Name Plate And Caution (English)(#102941-)
| 09***63 | Plate? Instruction,Air Cleaner (Single Element) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Name Plate And Caution (Indonesian)(#102941-)
| 09***61 | Plate? Instruction,(Indonesian-English)(Not Shown | 1 |
| 09***63 | Plate? Instruction,(For Indonesia) | 1 |
| 62***70 | Plate? Name,(Limited Supply) (Indonesian) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Oil Cooler (With Travel Damper)(#102941-)
| 01***25 | Bolt,(With Corrosion Resistor) | 18 |
| 01***06 | Nut | 4 |
| 07***12 | T/Plug, Plug,(For Power Tilt Mech Angle) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Oil Filler(#102941-)
| 01***16 | Screw | 4 |
| 61***20 | Cap Assembly, Oil Fill Tube | 1 |
| 61***80 | Gasket, Oil Fill Cap | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Oil Filter
| 60***41 | Cartridge,Engine Oil Filter (D31s) | 1 |
| 60***42 | Cartridge,Engine Oil Filter | 1 |
| 62***10 | Nipple | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Oil Level Gauge(#102941-150297)
| 62***10 | Guide,Oil Gauge | 1 |
| 62***40 | Gauge,Oil | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Oil Level Gauge(#150298-)
| 62***10 | Guide,Oil Gauge | 1 |
| 62***30 | Gauge,Oil (For Air Conditioner) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Oil Pan And Suction Tube(#102941-150297)
| 01***14 | Bolt,(W/Joy Stick Str.)(W/O Heater) | 28 |
| 01***12 | Bolt,(See Fig.0501) | 1 |
| 01***16 | Screw | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Oil Pan And Suction Tube(#150298-)
| 01***12 | Bolt - Front Cover Mounting | 3 |
| 01***12 | Bolt,(See Fig.0501) | 1 |
| 01***14 | Bolt | 28 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Oil Pump (Tropical Spec.)(#102941-)
| 01***16 | Screw | 4 |
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
| 62***10 | Valve | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Oil Pump(#102941-)
| 01***16 | Screw | 4 |
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
| 62***10 | Valve | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Piston
| 04***12 | Ring, Snap | 12 |
| 62***02 | Piston Ring Ass'Y,Per Cylinder | 6 |
| 62***10 | Pin,Piston | 6 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Rear Hanger(#202941-)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 62***20 | Hanger,Rear | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Rocker Arm(#102941-)
| 01***65 | Bolt,(For Alternator Bracket Mount) | 8 |
| 61***30 | Circlip | 2 |
| 62***20 | Spring | 5 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Spare Parts (For 35a? 75a Alternator)(#102941-)
| 04***56 | V-Belt Set,(For Chinese? 13a Alternator) | 1 |
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
| 60***41 | Cartridge,Engine Oil Filter (D31s) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Spare Parts(#102941-)
| 04***54 | V-Belt Set | 1 |
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
| 60***41 | Cartridge,Engine Oil Filter (D31s) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Starting Motor (5.5kw) (Inner Parts)(#102941-)
| 60***20 | Starting Motor Ass'Y,(5.5kw) | 1 |
| KD***30 | Bracket,Center | 1 |
| KD***20 | Cneter Bracket A | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Starting Motor Mounting (5.5kw)(#102941-)
| 01***16 | Bolt,(With Alternator Cover Type) | 1 |
| 01***30 | Bolt | 2 |
| 07***05 | O-Ring,(Not Used With Emergency Str.) (K2) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Stop Motor(#102941-)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
| 01***65 | Bolt,(For 35a? 25a Alternator) | 1 |
| 01***05 | Nut (Welded) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Water Pump (With C0rrosion Resister)(#102941-)
| 01***16 | Screw | 5 |
| 01***20 | Screw | 2 |
| 01***50 | Bolt,(For Shipping) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Water Pump Pulley(#102941-)
| 04***54 | V-Belt Set | 1 |
| 62***80 | Pulley?Non Hardening,(Tropical Sandy? Dusty Spec.) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Water Pump(#102941-)
| 01***16 | Screw | 5 |
| 01***20 | Screw | 2 |
| 01***50 | Bolt,(For Shipping) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : 6d95l-1hh Engine S/N 96999-Up : Water Separator(#102941-)
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
| 60***00 | Water Separator A.,(4d105-5h? 4d105-5t) | 1 |
| 60***60 | Plug,Drain (4d105-5h? 4d105-5t) | 1 |
Control System
Komatsu : Gd305a-1a(S/N 6734-Up) : Control System : Accelerator Pedal
| 01***20 | Bolt,(Without Maintenance Monitor) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***22 | Bolt | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Control System : Booster And Master Cylinder
| 04***30 | Seal, Dust | 1 |
| 23***70 | Seat | 1 |
| 23***20 | Spring | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Control System : Brake Pedal
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***08 | Nut,L.H. Thread | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Control System : Brake Piping (1/2)
Komatsu : Gd305a-1a(S/N 6734-Up) : Control System : Brake Piping (2/2)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Control System : Console Box (1/2)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Control System : Console Box (2/2)
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Control System : Fuel Control Lever
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***05 | Nut,L.H. Thread (D31s) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Control System : Hydraulic Control Lever? L.H.
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***16 | Screw | 1 |
| 01***05 | Nut,L.H. (For Trimming Dozer) | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Control System : Hydraulic Control Lever? L.H. (Without Scarifier)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***16 | Screw | 1 |
| 01***05 | Nut,L.H. (For Trimming Dozer) | 3 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Control System : Hydraulic Control Lever? R.H.
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***16 | Screw | 1 |
| 01***05 | Nut,L.H. (For Trimming Dozer) | 3 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Control System : Hydraulic Control Lever? R.H. (For Front Blade)
| 01***05 | Nut,L.H. (For Trimming Dozer) | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 3 |
| 01***08 | Washer,(For 1 Attachment And Pat) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Control System : Inching Pedal
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Control System : Parking Brake Control Lever
| 01***25 | Bolt,Without Revolution Sensor | 7 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Control System : Steering Wheel
| 01***11 | Nut - Mounting | 1 |
| 01***07 | Washer, Spring | 1 |
| 01***26 | Washer,(For Additional Rear Lamp) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Control System : Transmission Control Lever (1/2)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 4 |
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
| 01***20 | Screw, Filter Mounting | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Control System : Transmission Control Lever (2/2)
| 01***05 | Nut,L.H. Thread (D31s) | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Control System : Transmission Control Linkage
| 01***50 | Bolt,(With Service Valve R.H.) | 2 |
| 01***06 | Nut,L.H. Thread (For Russian) | 1 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 4 |
Engine Related Parts And Electrical System
Komatsu : Gd305a-1a(S/N 6734-Up) : Engine Related Parts And Electrical System : Air Cleaner Connection
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
| 07***95 | Clamp,Hose | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Engine Related Parts And Electrical System : Alternator (50a)
| 60***90 | Alternator A. (50a),(With Non Hardening Pulley) | 1 |
| SD***X0 | Washer | 1 |
| SD***X0 | Fan | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Engine Related Parts And Electrical System : Alternator And Mounting Parts (50a)
| 01***70 | Bolt | 1 |
| 01***10 | Nut,(Dust?Drip Proof? Trimming S.) | 1 |
| 01***23 | Washer, Flat | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Engine Related Parts And Electrical System : Battery (115e41r) (12v? 110ah)
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 8 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
| 08***00 | Terminal? (+),(10l) (Not Shown) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Engine Related Parts And Electrical System : Battery (130e41r) (12v? 110ah)
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 8 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
| 08***00 | Terminal? (+),(10l) (Not Shown) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Engine Related Parts And Electrical System : Battery (95e41r) (12v? 100ah)
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 8 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
| 08***00 | Terminal? (+),(10l) (Not Shown) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Engine Related Parts And Electrical System : Corrosion Resistor And Piping
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***85 | Bolt,(For Reversible Fan) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Engine Related Parts And Electrical System : Electrical System (Battery Line)
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***12 | Washer,(With Body Positioner) | 3 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Engine Related Parts And Electrical System : Electrical System (Engine Line)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 1 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Engine Related Parts And Electrical System : Electrical System (Front Line)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 3 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***30 | Bolt-Hex, Bolt,(With Center Guard) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Engine Related Parts And Electrical System : Electrical System (Monitor? Instrument Panel And Floor Line)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 4 |
| 01***14 | Bolt,(With Canopy) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Engine Related Parts And Electrical System : Electrical System (Rear Line)
| 01***12 | Bolt,(With Cylinder Cover) | 2 |
| 01***14 | Bolt,(With Canopy) | 1 |
| 01***12 | Screw,(With Articulate Indicator) | 12 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Engine Related Parts And Electrical System : Engine And Transmission Mounting Parts
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***40 | Bolt,(With Service Valve R.H.) | 16 |
| 01***50 | Bolt,(For Tbg/Abe Spec.) | 8 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Engine Related Parts And Electrical System : Engine Stop Motor And Mounting Parts
| 01***30 | Bolt | 3 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Engine Related Parts And Electrical System : Fog Lamp (Cab Top Mounting Type)
| 01***16 | Bolt (With Air Heater & Conditioner) | 1 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 6 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Engine Related Parts And Electrical System : Fuel And Hydraulic Tank
| 01***50 | Bolt,(For Tbg/Abe Spec.) | 4 |
| 01***85 | Bolt,(For Perforated Mask) | 4 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 8 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Engine Related Parts And Electrical System : Fuel Piping
| 01***20 | Bolt,(With Auto Emergency Steering) | 1 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Engine Related Parts And Electrical System : Instrument Panel
| 01***16 | Screw,(P.O.C. Model) (Except Japan) | 4 |
| 01***23 | Washer,(With Auto Emergency Steering) | 8 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Engine Related Parts And Electrical System : Monitor Panel
| 01***12 | Bolt,(With Cylinder Cover) | 1 |
| 01***16 | Screw | 6 |
| 01***12 | Washer,(With Body Positioner) | 7 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Engine Related Parts And Electrical System : Radiator
| 01***16 | Bolt (With Air Heater & Conditioner) | 8 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***45 | Bolt, Mounting Bracket To Radiator (Top) | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Engine Related Parts And Electrical System : Radiator Piping
| 07***45 | Clamp,Hose | 2 |
| 07***55 | Clamp, Hose | 2 |
| 23***40 | Hose | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Engine Related Parts And Electrical System : Water Separator
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
| 60***00 | Water Separator A.,(4d105-5h? 4d105-5t) | 1 |
| 60***60 | Plug,Drain (4d105-5h? 4d105-5t) | 1 |
Frame And Guard
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Air Conditioner (1/10) (Air Conditioner Unit And Related Parts)
| 01***30 | Bolt,(For Mechanical Governor) | 6 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 9 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 6 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Air Conditioner (10/10) (Air Compressor Inner Parts)
| 20***10 | Air Compressor A. (Kit) | 1 |
| ND***70 | Clamp, Tapping | 1 |
| ND***40 | Compressor Assembly | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Air Conditioner (2/10) (Condensor And Mounting Parts)
| 01***18 | Bolt | 8 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***20 | Bolt (Op) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Air Conditioner (3/10) (Compressor And Related Parts)
| 01***85 | Bolt,Spring | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Air Conditioner (4/10) (Cooler Piping)
| 01***20 | Bolt,(Without Maintenance Monitor) | 4 |
| 01***25 | Bolt,(For Automatic) | 2 |
| 01***30 | Bolt | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Air Conditioner (5/10) (Heater Piping)
| 01***18 | Bolt | 1 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Air Conditioner (6/10) (Air Piping? Front)
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***25 | Bolt,Without Revolution Sensor | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Air Conditioner (7/10) (Air Piping? Rear)
| 23***40 | Hose | 1 |
| 23***50 | Hose | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Air Conditioner (8/10) (Control Panel)
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Air Conditioner (9/10) (Electrical Parts)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Auxiliary Seat
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***08 | Screw, Terminal | 10 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Canvas Canopy
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 10 |
| 01***30 | Bolt-Hex, Bolt,(With Center Guard) | 8 |
| 01***40 | Screw | 8 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Canvas Canopy (Folding Type)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
| 01***30 | Bolt-Hex, Bolt,(With Center Guard) | 8 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Front Frame
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 28 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 8 |
| 01***32 | Washer,(With Auto Emergency Steering) | 28 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Front Weight
| 01***60 | Bolt,(For Ripper) | 2 |
| 01***15 | Bolt,(12200kg Spec) | 4 |
| 01***19 | Nut - M24 | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Operator'S Cab (1/9) (Body)
| 01***12 | Bolt,(With Cylinder Cover) | 2 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 6 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Operator'S Cab (2/9) (Inner Panel)
| 23***11 | Panel | 1 |
| 23***21 | Panel | 1 |
| 23***31 | Panel | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Operator'S Cab (3/9) (Front And Rear Window)
| 01***10 | Screw | 12 |
| 01***16 | Screw | 24 |
| 01***04 | Nut | 8 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Operator'S Cab (4/9) (Door)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***15 | Bolt | 16 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Operator'S Cab (5/9) (Door Lock)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 4 |
| 01***12 | Screw | 4 |
| 01***23 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Operator'S Cab (6/9) (Electrical System)
| 01***10 | Screw,(For Lighter) | 2 |
| 01***05 | Washer,(Without Window Washer) | 2 |
| 08***10 | Grommet,(For Slag Handling) | 13 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Operator'S Cab (7/9) (Front Wiper)
| 01***12 | Bolt,(With Cylinder Cover) | 6 |
| 01***10 | Screw | 2 |
| 01***12 | Screw | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Operator'S Cab (8/9) (Window Washer)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***23 | Washer,(With Auto Emergency Steering) | 2 |
| 23***30 | Bracket | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Operator'S Cab (9/9) (Accessory Parts)
| 01***12 | Screw | 4 |
| 01***08 | Screw - Holder | 2 |
| 01***08 | Screw | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Operator'S Compartment (Control Box)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 13 |
| 01***30 | Bolt | 2 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Operator'S Compartment (Control Box) (With Rigid Seat) (Without Air Conditioner)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 13 |
| 01***30 | Bolt | 2 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Operator'S Compartment (Floor Frame And Step)
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***18 | Bolt,(Without Cab Guard) | 8 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 8 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Operator'S Compartment (Floor Frame And Step) (With Rigid Seat) (Without Air Conditioner)
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***18 | Bolt,(Without Cab Guard) | 8 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 8 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Operator'S Seat
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 4 |
| 01***25 | Bolt,(Rear Attachment Less) | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Operator'S Seat (Rigid Type)
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
| 36***01 | Seat Ass'Y | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Operator'S Seat Belt
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 09***01 | Bolt,(For Shipping) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Radiator Guard And Engine Hood
| 01***16 | Bolt (With Air Heater & Conditioner) | 8 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 22 |
| 01***08 | Screw - Clip Mounting | 9 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Rear Frame
| 01***40 | Bolt, Mount Master Brake Cylinder | 2 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 1 |
| 01***30 | Bolt,(For Rubber Shoe) | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Rear Under View Mirror
| 01***25 | Bolt,Without Revolution Sensor | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
| 01***06 | Nut | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Side Panel (1/2)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***10 | Screw,(With Air Conditioner) | 2 |
| 01***23 | Washer,(With Auto Emergency Steering) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Side Panel (2/2)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***22 | Bolt | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 16 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Frame And Guard : Steel Canopy
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 10 |
| 01***30 | Bolt-Hex, Bolt,(With Center Guard) | 8 |
| 01***40 | Screw | 8 |
Hydraulic System
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Blade Lift Cylinder
| 01***65 | Bolt,(With Canvas Or Rops Canopy) | 2 |
| 01***13 | Nut,(For Adjustable Rod) | 2 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Blade Side Shift Cylinder
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
| 07***55 | O-Ring,(F4350-62a1 -14 ) | 1 |
| 07***04 | Bushing | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Flow Divider Valve
| 23***00 | Valve Ass'Y,Flow Divider | 1 |
| 23***10 | Body | 1 |
| 23***20 | Spool | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Hydraulic Control Valve? L.H. (4-Spool) (1/2)
| 23***00 | Control Valve Ass'Y | 1 |
| KB***02 | Seat,Spring | 2 |
| KB***07 | Screw,Cap | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Hydraulic Control Valve? L.H. (4-Spool) (2/2)
| KB***02 | Seat,Spring | 4 |
| KB***07 | Screw,Cap | 1 |
| KB***81 | Bolt | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Hydraulic Control Valve? R.H. (3-Spool)
| 23***00 | Control Valve Ass'Y | 1 |
| KB***02 | Seat,Spring | 4 |
| KB***07 | Screw,Cap | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Hydraulic Control Valve? R.H. (4-Spool) (With Front Blade)
| 23***00 | Control Valve Ass'Y | 1 |
| KB***02 | Seat,Spring | 4 |
| KB***07 | Screw,Cap | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Hydraulic Filter
| 23***00 | Filter Ass'Y | 1 |
| 23***20 | Cover | 1 |
| 23***30 | Tube | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Hydraulic Motor
| 23***10 | Seal Ass'Y | 1 |
| 23***00 | Motor Ass'Y,Hydraulic | 1 |
| 23***10 | Screw | 7 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Hydraulic Piping (Articulate Cylinder Line)
| 01***55 | Bolt,(10m) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Hydraulic Piping (Blade Lift Cylinder Line)
| 01***55 | Bolt,(10m) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Hydraulic Piping (Blade Side Shift Cylinder Line) (1/2)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***40 | Bolt, Mount Master Brake Cylinder | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Hydraulic Piping (Blade Side Shift Cylinder Line) (2/2)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Hydraulic Piping (Control Valve Connecting Parts? L.H.)
| 07***18 | O-Ring, Divider Valve Mounting | 10 |
| 07***22 | Nut, Sleeve (For Shipping) | 2 |
| 07***14 | Plug,(Without Float Blade) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Hydraulic Piping (Control Valve Connecting Parts? R.H.)
| 07***18 | O-Ring, Divider Valve Mounting | 6 |
| 23***20 | Nipple,Circle Reverse | 2 |
| 23***50 | Elbow,Blade Side Shift | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Hydraulic Piping (Control Valve Connecting Parts? R.H.) (With Front Blade)
| 07***18 | O-Ring, Divider Valve Mounting | 8 |
| 23***20 | Nipple,Circle Reverse | 4 |
| 23***51 | Tube,Blade Lift | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Hydraulic Piping (Control Valve To Hydraulic Tank)
| 01***20 | Bolt,(Without Maintenance Monitor) | 6 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Hydraulic Piping (Flow Divider Valve To Control Valve)
| 01***30 | Bolt,(For Mechanical Governor) | 6 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 6 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Hydraulic Piping (Hydraulic Motor Line) (1/2)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***40 | Bolt, Mount Master Brake Cylinder | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Hydraulic Piping (Hydraulic Motor Line) (2/2)
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
| 07***18 | O-Ring, Divider Valve Mounting | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Hydraulic Piping (Leaning Cylinder Line)
| 01***60 | Bolt,(For Japan And Sweden) | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 6 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Hydraulic Piping (Lilt Cylinder Line) (For Front Blade)
| 01***60 | Bolt,(For Japan And Sweden) | 2 |
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 2 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Hydraulic Piping (Scarifier Cylinder Line)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Hydraulic Piping (Tank To Pump To Flow Divider Valve)
| 01***90 | Bolt, Priority Valve Mounting | 3 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Hydraulic Pump (For Work Equipment And Steering)
| 23***01 | Pump Ass'Y | 1 |
| KB***05 | Plate,Center | 1 |
| KB***50 | Washer,Spring | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Pilot Check Valve (For Articulate)
| 07***14 | O-Ring,(F4350-61a0a-20 ) | 5 |
| 07***14 | Ring,Back-Up (Kit), Ring,Back-Up; Komatsu S/N 20501-22940 - Was 07001-02014 | 3 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Pilot Check Valve (For Blade Lift)
| 07***14 | O-Ring,(F4350-61a0a-20 ) | 6 |
| 07***14 | Ring,Back-Up (Kit), Ring,Back-Up; Komatsu S/N 20501-22940 - Was 07001-02014 | 4 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Pilot Check Valve (For Front Blade)
| 07***14 | O-Ring,(F4350-61a0a-20 ) | 2 |
| 07***14 | Ring,Back-Up (Kit), Ring,Back-Up; Komatsu S/N 20501-22940 - Was 07001-02014 | 1 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Pilot Check Valve (For Leaning)
| 07***14 | O-Ring,(F4350-61a0a-20 ) | 6 |
| 07***14 | Ring,Back-Up (Kit), Ring,Back-Up; Komatsu S/N 20501-22940 - Was 07001-02014 | 4 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Pilot Check Valve (For Scarifier)
| 01***16 | Washer,(With Water Separator) | 1 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 1 |
| 23***20 | Elbow | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Scarifier Cylinder
| 01***65 | Bolt,(With Canvas Or Rops Canopy) | 4 |
| 01***13 | Nut,(For Adjustable Rod) | 4 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Hydraulic System : Swivel Joint
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 2 |
| 07***65 | O-Ring,(F5350-62a0 -14 ) | 2 |
Mark Plate? Tool And Kit
Komatsu : Gd305a-1a(S/N 6734-Up) : Mark Plate? Tool And Kit : Marks And Plates
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Instruction,Fuel | 1 |
| 09***00 | Plate? Safety,Articurate Lock | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Mark Plate? Tool And Kit : Service Kit
| 07***65 | O-Ring,Injection Pump Case | 1 |
| 07***75 | O-Ring,Steering Oil Filter | 1 |
| 07***90 | O-Ring,(Dk029369-0020) (K2) | 3 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Mark Plate? Tool And Kit : Tables
| 09***80 | Case,(Except Japan) | 1 |
| 23***11 | Table,Tool | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Mark Plate? Tool And Kit : Tool And Spare Parts
| 07***50 | Pump, (Bellows Type) | 1 |
| 07***03 | Cartridge - Grease | 1 |
| 07***45 | Nozzle, Grease Pump (Non-Flexible Type) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Mark Plate? Tool And Kit : Tool Box
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***32 | Washer,(With Auto Emergency Steering) | 8 |
| 23***10 | Bracket | 1 |
Power Train
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Articulate Cylinder
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Booster Piping
| 07***34 | O-Ring,(For 2-Actuater Attachment) | 2 |
| 07***08 | Plug,(Without Accumulator) | 2 |
| 07***18 | Hose | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Drive Shaft
| 01***45 | Bolt | 8 |
| 01***32 | Washer,(With Auto Emergency Steering) | 8 |
| 23***00 | Drive Shaft Ass'Y | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Final Drive Case (1/2)
| 01***40 | Bolt,(With Service Valve R.H.) | 32 |
| 01***45 | Bolt,(For Travel Motor) (Not Show) | 24 |
| 01***70 | Bolt,Rear Carrier (With Gumpad) | 28 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Final Drive Case (2/2)
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 14 |
| 01***50 | Bolt,(For Tbg/Abe Spec.) | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 14 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Final Drive Gear (1/2)
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 3 |
| 01***45 | Bolt, Mounting Bracket To Radiator (Top) | 6 |
| 01***35 | Bolt,R.H. Outside And L.H. Inside | 12 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Final Drive Gear (2/2)
| 01***45 | Bolt, Mounting Bracket To Radiator (Top) | 6 |
| 04***04 | Ring, Snap (2) | 2 |
| 23***10 | Lock,Shaft | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Front Axle (1/3)
| 01***35 | Bolt, Hydraulic Tank Mounting | 2 |
| 01***25 | Bolt | 1 |
| 01***13 | Nut | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Front Axle (2/3)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***40 | Bolt | 12 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Front Axle (3/3)
| 01***30 | Bolt,(Not Used When Towing Winch) | 3 |
| 01***21 | Nut,(Except Japan) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Joint
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 12 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 6 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Leaning Cylinder
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
| 07***55 | O-Ring,(F4350-62a1 -14 ) | 1 |
| 07***55 | Ring,Back-Up? Cylinder Head | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Steering Cylinder
| 04***18 | Ring, Snap | 2 |
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
| 07***55 | O-Ring,(F4350-62a1 -14 ) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Steering Piping (1/2)
| 01***32 | Washer, (Without Emergency Steering) | 8 |
| 02***25 | Bolt,(Cold Weather Spec.) | 4 |
| 02***64 | Bolt | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Steering Piping (2/2)
| 01***35 | Bolt,(For Position Fixing) | 1 |
| 01***40 | Bolt, Mount Master Brake Cylinder | 1 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Steering Valve (1/2)
| 23***20 | Ring | 1 |
| 23***60 | Bearing Ass'Y | 1 |
| 23***70 | Race,Bearing | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Steering Valve (2/2)
| 23***40 | Housing Ass'Y | 1 |
| 23***70 | Spring | 1 |
| 23***80 | Plug Ass'Y | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Tandem Drive Case
| 01***30 | Bolt,(Not Used With Emergency Str.) | 16 |
| 01***23 | Washer,(With Car Heater) | 2 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 16 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Tandem Drive Gear And Chain
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***45 | Bolt, Mounting Bracket To Radiator (Top) | 6 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Transmission (1st Clutch)
| 01***75 | Capscrew | 18 |
| 01***23 | Washer,(For Shipping) | 18 |
| 04***24 | Pin,Dowel (For No.3 Housing) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Transmission (2nd Clutch)
| 01***60 | Capscrew | 2 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 2 |
| 04***24 | Pin,Dowel (For No.3 Housing) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Transmission (Control Valve Cover)
| 01***50 | Capscrew | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(With Body Positioner) | 12 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Transmission (Control Valve) (1/3)
| 01***30 | Bolt - M8 X 30lg | 10 |
| 01***45 | Screw | 4 |
| 01***50 | Capscrew | 9 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Transmission (Control Valve) (2/3)
| 01***50 | Bolt (Kit) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 10 |
| 01***40 | Bolt (Op) | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Transmission (Control Valve) (3/3)
| 01***60 | Bolt,(With Body Positioner) | 3 |
| 01***30 | Capscrew (1) | 1 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 3 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Transmission (Forward And 3rd Clutch)
| 04***24 | Pin,Dowel (For No.3 Housing) | 2 |
| 04***15 | Ring,Snap | 1 |
| 04***15 | Ring,Back-Up | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Transmission (Low And High Clutch)
| 01***65 | Capscrew | 1 |
| 01***75 | Capscrew | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 7 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Transmission (Output Shaft) (1/2)
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 10 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Transmission (Output Shaft) (2/2)
| 01***16 | Bolt - Box Mounting | 4 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 14 |
| 01***50 | Bolt,For Weight Adjusting Bolt | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Transmission (Parking Brake)
| 01***60 | Screw | 1 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 1 |
| 07***55 | O-Ring,(F2320-63a2 -9 ) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Transmission (Power Take Off) (1/2)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 4 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 5 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Transmission (Power Take Off) (2/2)
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 8 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 7 |
| 04***20 | Ring, Retaining | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Transmission (Reverse Clutch)
| 01***75 | Capscrew | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 10 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Transmission (Transfer Case)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 17 |
| 01***32 | Washer,(With Auto Emergency Steering) | 12 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Transmission (Transmission Case)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
| 04***12 | Ring,Snap (For Ripper) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Transmission Oil Cooler Piping
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
| 01***50 | Bolt,(With Service Valve R.H.) | 2 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Transmission Oil Filter
| 01***60 | Bolt | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
| 04***12 | Ring, Snap | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Transmission Piping
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***60 | Bolt, Mount Tube To Switch Pump | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Power Train : Transmission Pump
| 23***01 | Pump Ass'Y | 1 |
| KB***50 | Washer,Spring | 4 |
| KB***05 | Flange | 1 |
Wheels
Komatsu : Gd305a-1a(S/N 6734-Up) : Wheels : Front Wheel (10.00-20-8pr)
| 23***50 | Valve,Valve | 1 |
| 23***60 | Cap,Valve | 1 |
| 23***20 | Tube | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Wheels : Front Wheel (11.00-20-10pr)
| 23***23 | Ring,Side | 1 |
| 23***50 | Valve,Valve | 1 |
| 23***60 | Cap,Valve | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Wheels : Rear Wheel (10.00-20-8pr)
| 23***23 | Ring,Side | 1 |
| 23***50 | Valve,Valve | 1 |
| 23***60 | Cap,Valve | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Wheels : Rear Wheel (11.00-20-10pr)
| 23***23 | Ring,Side | 1 |
| 23***50 | Valve,Valve | 1 |
| 23***60 | Cap,Valve | 1 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Wheels : Wheel Brake
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***45 | Bolt, Mount Center Hinge Retainer (Upper) | 24 |
| 01***10 | Nut,(Without Air Conditioner) | 4 |
Work Equipment
Komatsu : Gd305a-1a(S/N 6734-Up) : Work Equipment : Blade (2800mm Width)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
| 01***30 | Bolt-Hex, Bolt,(With Center Guard) | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Work Equipment : Blade (3100mm Width) (Without Blade Side Shift Cylinder Cover)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***25 | Bolt,(For Rubber Shoe) | 2 |
| 01***35 | Bolt,R.H. Outside And L.H. Inside | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Work Equipment : Blade Lifter And Drawbar Shift Rod
| 01***55 | Bolt, Mount Lh Bracket | 8 |
| 01***40 | Bolt,R.H. Outside And L.H. Inside, Bolt | 4 |
| 01***65 | Bolt,(With Canvas Or Rops Canopy) | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Work Equipment : Circle Reverse Gear (1/2)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***55 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***70 | Bolt,Leaning Lock | 2 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Work Equipment : Circle Reverse Gear (2/2)
| 01***20 | Bolt,(With Auto Emergency Steering) | 1 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 2 |
| 01***55 | Bolt | 6 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Work Equipment : Circle Support
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
| 01***19 | Nut - M24 | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Work Equipment : Drawbar
| 01***35 | Bolt,(Without Scarifier) | 8 |
| 01***70 | Bolt | 8 |
| 01***50 | Stud | 4 |
Komatsu : Gd305a-1a(S/N 6734-Up) : Work Equipment : Scarifier
| 01***90 | Bolt (Kit) | 2 |
| 01***00 | Bolt,(Without Cab) | 2 |
| 01***19 | Nut - M24 | 2 |
GD305A-1A(S/N 6734-UP) serial number reference
The ID plate on this era of Komatsu GD-series grader is a riveted metal tag mounted on the frame near the operator's cab; some units repeat the number stamped into the frame rail itself. Read the plate as the full model code (GD305A-1A) followed by a plain numeric serial number; this model line uses no alpha prefix ahead of the digits, so the serial number itself (e.g. 6734 and up) is what determines the correct parts and service manual to use.
| Prefix | Identifies | Notes |
|---|---|---|
| 6734-UP | GD305A-1A current production block | Komatsu documents this grader by a plain numeric serial number under the model code, with no three-letter PIN prefix scheme. Engine fitted for this block is the 6D95L-1HH, part of the naturally aspirated 6D95L-1 engine family (no SA-prefix turbo designation). |
| 6001-6733 | GD305A-1 predecessor serial block | Production run immediately ahead of 6734-UP under the same base model line, covered by its own separate parts manual. Confirm with dealer whether engine and configuration match the 6734-UP block before assuming parity. |
Frequently asked questions
What engine does the Komatsu GD305A-1A(S/N 6734-UP) use?
It uses the Komatsu 6D95L-1 family inline-6, water-cooled, direct-injection diesel, displacing about 4.9 liters and rated near 63.3 kW (86 PS) at 2500 rpm. Fuel delivery is fully mechanical, with no electronic engine control. Within this serial block, the engine carries a running-change suffix to 6D95L-1HH.
What is the operating weight of the GD305A-1A(S/N 6734-UP)?
Operating weight is approximately 7950 kg (about 17,530 lb) for this configuration, with an overall length of 6815 mm (22 ft 4 in) and a 2843 mm (9 ft 4 in) moldboard.
What replaced the Komatsu GD305A-1A motor grader?
The GD305A-1 line was eventually succeeded by the GD305A-3, a later generation built on Komatsu's S4D102E four-cylinder engine with different operating weight and dimensions. It is a distinct design, not a direct running change, so parts and service specs do not carry over between the two.
What GD305A-1A(S/N 6734-UP) owners discuss
What's the reputation of the 6D95L-1 engine in this grader, and does it have any known quirks?
This serial range runs the mechanical-injection inline-6 water-cooled 6D95L-1 (running-change suffix -1HH), the same base engine family used across Komatsu excavators and loaders of this era. It has no electronic engine controls, which owners generally rate as an advantage for field repairability. The recurring complaint on high-hour units is injection pump trouble traced to fuel contamination: dirt or water in the tank lets the pump plungers stick, and black exhaust smoke paired with rough or uneven running is the usual first sign. Frequent fuel filter changes and keeping the tank full to limit condensation are the standard preventive habit. Have your dealer verify injection pump condition before budgeting for a rebuild.
How does the circle-turn hydraulic system behave as this machine ages, and what's causing it?
Owners on older mechanical-era graders describe circle rotation going slow, jerky, or uneven with hours. The usual causes are worn cylinder seals bleeding off pressure, low or contaminated hydraulic fluid, a control valve that's lost precision, or circle guide and clamp shoes that have worn out of adjustment and are binding the ring gear. This is the standard failure path for grader circle systems generally, not unique to this serial range, and it's usually accelerated by heavy blade pressure or turning on uneven ground. Routine fluid changes and periodic shoe adjustment keep it tight. Have your dealer verify circle and cylinder condition if turning response feels sluggish or inconsistent.
What wear pattern shows up in the tandem wheel drives on this class of grader?
Tandem case housings are a known spot for gear-oil seepage, most often at the mechanical face seal near the wheel hub or sprocket. Operators report catching this early with a daily walk-around checking for oil weeping behind the wheel, plus a level check on a set interval. Left unchecked, a slow seep turns into a low-oil condition that accelerates bearing and gear wear inside the case. This is routine wear-and-maintenance territory common to grader tandem drives in general, not a defect specific to this model.
Are there known electrical or starting-system issues on this era of Komatsu grader?
This machine predates electronic sensor controls, so what mechanics flag as "electrical issues" are basic charging and cold-start problems rather than sensor faults. Corroded battery and glow-plug connections are the most common complaint; cleaning and tightening ground contacts at the frame resolves a lot of no-start and slow-crank cases. A glow plug circuit that stays energized too long can pull enough current to drag the charging system down and mimic an alternator fault, so that's worth ruling out first. Have your dealer verify the charging system and glow-plug circuit if starting is inconsistent or gauges read erratically.
What causes loss of fine-grade accuracy as these graders wear?
Operators tie inconsistent finish grading to looseness anywhere in the blade-control chain: worn moldboard slide wear inserts, a sloppy drawbar ball stud, or out-of-adjustment circle support shoes all show up as the same symptom, blade chatter or drift instead of a clean pass. The standard check is to raise the moldboard off the ground and look for gap at the drawbar wear insert; play there gets amplified at the cutting edge. This is wear-and-adjustment territory common to grader circles in general rather than something specific to this serial range.
How does the power-shift/torque-converter drivetrain typical of this era hold up?
Komatsu torque-converter power-train systems of this vintage are generally reliable if the transmission oil is kept clean and at the correct level and type; wrong oil or low fluid is the most cited cause of torque converter overheating, slipping, or premature wear. Clutch packs are the component most likely to give trouble over time, showing up as slipping or hesitation between gears. Regular oil and filter service on the schedule in the shop manual is the standard preventive measure reported by mechanics working on this class of machine.
What should a buyer inspect before purchasing a used GD305A-1A (S/N 6734-UP)?
Sight down the machine at the articulation point to confirm the front and rear frame halves line up level; a cab that sits noticeably higher or lower than the engine deck points to a bent or loose articulation joint. Walk the main frame rails looking for fishplates (welded reinforcement patches over a repaired crack); not automatically a dealbreaker, but only acceptable if done by a competent welder, and check that the frame doesn't lean to one side. Confirm tandem case oil levels and check for seepage at the wheel hubs, inspect hydraulic hoses and cylinders at the circle and lift points for cracking or leaks, and check moldboard slide and drawbar ball play as described above. Compare wear at the brake pedal and operator seat against the hour meter as a sanity check on reported hours. Have your dealer verify frame, circle, and hydraulic condition with a full inspection before finalizing a purchase.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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