Caterpillartrack-type tractor
Caterpillar D6D SR
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar D6D SR is the direct-drive configuration of Cat's D6D medium track-type tractor, identified in Caterpillar's own parts documentation as a distinct factory build separate from the standard powershift D6D, the D6D SA agricultural trim, and the D6D LGP low-ground-pressure trim. Instead of a torque-converter transmission, the SR uses a mechanical transmission with oil-cooled clutch packs for gear selection and dry, adjustable steering clutches and brake bands for steering - the same direct-drive architecture Caterpillar carried forward on the later D6E SR and D6F SR configurations. Power comes from the turbocharged Cat 3306 diesel, rated at roughly 104 kW (140 hp) gross for this chassis. Operating weight for the D6D family is inconsistently published across sources, ranging from roughly 9.2 to 17.4 tonnes (20,000 to 38,300 lb) depending on equipment and configuration; no dedicated SR-specific figure is published, so treat this as a reference band and confirm against the machine's nameplate. The D6D line, introduced in 1977, replaced the D6C (in production since 1963); Caterpillar offered it with straight, angling, or semi-universal blades, plus rear ripper, winch, or swinging-drawbar attachments depending on the job.
Caterpillar kept refining cooling, air intake, and steering-clutch details through the D6D's run without renaming the model, and the direct-drive parts book was later shared across D6D SR, D6E SR, D6F SR, and D6G SR as those generations followed, so service and parts information has to be matched to the correct build rather than just the D6D nameplate. Because the SR shares its chassis and blade/implement fitments with the wider D6D family but runs a different power train than the standard powershift version, mixing up transmission, steering-clutch, and final-drive parts between the two is a common and costly mistake. In the used and parts market, the D6D SR stays in demand for its mechanical simplicity: no torque converter, powershift valve body, or electronics to diagnose, which keeps overhaul costs predictable and makes it a practical choice for remote, oilfield, or forestry work where dealer diagnostic support isn't close at hand. Undercarriage and final-drive condition, more than engine hours, are what drive resale value on a machine this age.
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.
Caterpillar D6D SR specifications
Identification
| Model line | Caterpillar D6D SR track-type tractor, a factory trim/configuration within the D6D lineup, distinct from the standard D6D, the D6D SA (agricultural) trim, and the D6D LGP (low ground pressure) trim. |
| Configuration notes | SR is a separate undercarriage/gauge configuration offered alongside standard and LGP D6D builds. Public spec aggregators do not carry a dedicated data sheet for this trim, so most published D6D numbers below reference the wider D6D family rather than an SR-specific test sheet. Treat weight, dimension, and ground-pressure figures as reference points, not confirmed SR values, unless noted otherwise. |
Engine
| Engine model | Caterpillar 3306, inline 6-cylinder diesel, turbocharged. |
| Displacement | 10.5 L (640.7 cu in) |
| Gross power | Approximately 104 kW (140 hp) gross. |
| Net/drawbar power | Not separately published for this configuration in available sources. |
| Aspiration | Turbocharged. |
| Emissions tier | Pre-emissions-regulation, mechanically governed diesel, typical of this production era. No EPA/Tier rating applies. |
| Governor/fuel system | Mechanical governor with fuel-ratio (air/fuel) control and mechanical fuel-injection pump, consistent with mechanically governed diesels of this era. |
Weights
| Base/standard D6D reference weight | Roughly 9,235 kg (20,360 lb) as a stripped/base figure up to about 13,600 kg (30,000 lb) as an operating weight with standard equipment. Sources disagree depending on whether blade and standard attachments are included. |
| D6D LGP reference weight | Roughly 17,373 kg (38,301 lb) operating weight, for comparison only (wide-gauge low ground pressure trim, not SR). |
| D6D SR operating weight | Not separately published in available specification sources. As a wide-gauge/flotation-oriented trim, expect a figure between the standard and LGP references above. Verify against the unit's own nameplate or dealer build data. |
Dimensions
| Operating length (reference) | 4.57 m (15 ft 0 in), standard-configuration reference figure. |
| Operating width (reference) | 1.96 m (6 ft 5 in), standard-configuration reference figure. |
| Operating height (reference) | 2.87 m (9 ft 5 in), standard-configuration reference figure. |
| Track gauge (reference) | 1.52 m (4.99 ft), standard-configuration reference figure. |
| Length of track on ground (reference) | 1.83 m (6.01 ft), standard-configuration reference figure. |
| Ground clearance (reference) | 0.36 m (1.19 ft), standard-configuration reference figure. |
| Track shoe width range | Standard shoe width about 406 mm (16 in); wider flotation-type shoes up to about 915 mm (36 in) are used on wide-gauge/LGP-style D6D undercarriages. |
| SR-specific dimensions | Not separately published. SR trims typically run a wider track gauge than the standard tractor for added flotation; exact figures for this trim were not found in available sources. Confirm against dealer data for the exact serial range. |
Performance
| Transmission | Direct-drive mechanical transmission with oil-cooled clutch packs for gear selection, paired with dry steering clutches and brake bands for steering — not a torque-converter powershift. The standard (non-SR) D6D nameplate offered a separate powershift transmission; the SR configuration is covered by its own direct-drive power train documentation. |
| Maximum travel speed, forward (reference) | About 10.8-10.9 km/h (6.7-6.8 mph). |
| Maximum travel speed, reverse (reference) | About 12.9 km/h (8 mph). |
| Ground pressure, standard undercarriage (reference) | About 65-66 kPa (9.4-9.5 psi). |
| Ground pressure, LGP undercarriage (reference) | About 32-35 kPa (4.7-5 psi), for comparison only. |
| Ground pressure, SR undercarriage | Not separately published. As an intermediate wide-gauge/flotation trim, expect a figure between the standard and LGP references above. Verify with dealer/nameplate data. |
| Drawbar pull | Not documented in available sources for this configuration. |
| Gradeability | Not documented in available sources for this configuration. |
Blades
| Straight (S) blade, reference figures | About 3.2 m (10.5 ft) width, maximum cut depth about 472 mm (18.6 in), capacity about 3.1-3.3 cubic m (4.1-4.3 cubic yd). Reference figures for the D6D family's standard blade. |
| Other blade types | Universal (U), semi-U (SU), and LGP-specific blade capacities are not separately documented in available sources for the SR trim. |
| SR blade fitment | Not separately published. Confirm exact blade type and capacity against the specific unit's build sheet. |
Service capacities summary
| Hydraulic (implement) system | About 45.8 L (12.1 gal), reference figure for the D6D family. |
| Fuel tank | About 238 L (62.9 gal), reference figure for the D6D family. |
| Engine oil (crankcase, incl. filter) | Roughly 27-34 L (28.5-36.0 US qt), a general range for the 3306 diesel depending on pan and filter configuration; not confirmed specific to this chassis. |
| Cooling system | Roughly 30-50 L (32-53 US qt), a general range for the 3306 diesel depending on radiator/fan configuration; not confirmed specific to this chassis. |
| Capacity caveat | Engine oil and cooling system capacities are not separately published for the SR trim specifically. Verify against the service manual for the exact serial prefix before servicing. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
D6D SR fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) — Cat 3306 turbocharged diesel | approx. 27–27.6 L (7.2–7.3 US gal / about 28.5–29 US qt) | Cat diesel engine oil (Cat DEO or an equivalent heavy-duty diesel engine oil meeting the era-correct API diesel spec). Viscosity by ambient temperature per Cat's engine oil chart: SAE 30 or SAE 10W-30 for roughly 0°C to 40°C (32°F to 104°F); SAE 10W down to about -18°C (0°F); an arctic-grade oil (0W-20/0W-30) below that. SAE 15W-40 multigrade is a common all-season substitute above about -9°C (15°F). |
| Cooling system | not consistently documented for this exact configuration across available sources — verify against the machine's own OMM or with your dealer | Full-strength, corrosion-inhibited heavy-duty antifreeze/coolant meeting Cat's coolant specification for this era, with Cat coolant conditioner (SCA) added and renewed on the scheduled interval. |
| Fuel tank | 238 L (62.9 US gal) | No. 2-D diesel fuel meeting the OMM's fuel spec; No. 1-D diesel in cold weather to reduce wax/gelling risk. |
| Direct-drive transmission (mechanical, oil-cooled clutch packs) | not broken out separately in available sources — this platform shares one drain/fill point with the bevel-gear/steering-clutch compartment | Cat TO-4 (early D6D production was originally spec'd to Cat TO-2, later superseded by TO-4) or Cat TDTO, SAE 30. |
| Bevel gear and steering-clutch compartment | combined with the transmission oil on a common fill/drain point per the OMM; no distinct capacity figure found across sources | Same oil as the transmission — Cat TO-4 or Cat TDTO, SAE 30. |
| Final drives (each side) | figures vary across sources for this model line, roughly in the 13–19 L (3.5–5 US gal) range per side — not consistently confirmed for this exact configuration; verify with your dealer | Cat TO-4 or Cat TDTO, SAE 50. Do not substitute a straight SAE 50 engine oil in this compartment — zinc-additive engine oils have been reported to damage the bronze final-drive components. |
| Hydraulic system/tank | 45.8 L (12.1 US gal) | Cat TO-4 or Cat TDTO, SAE 10W, in the hydraulic tank. |
| Pivot shaft | not documented as a separate lubrication/fill point for this model in available sources | not documented separately — check equalizer bar/track-frame pivot lubrication against the OMM's lube schedule |
| Grease (chassis lube points) | no fill volume — applied at grease fittings per the lube schedule, not a sump or tank fill | Cat Multipurpose Grease, NLGI 2, suited to roughly -30°C to 40°C (-22°F to 104°F); a moly-fortified multipurpose or extreme-application grease for heavily loaded pins and bushings. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar D6D SR maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 6,000 h |
|
Servicing the D6D SR beyond the schedule
Predictive Maintenance and Fluid Analysis
Sample engine oil, the shared transmission/steering-clutch oil, and final-drive oil on schedule. Final drive bearing wear is the costliest failure on this platform - rising metal counts or a worn-smooth drive taper are the early warning, often years before a rebuild is due. Watch the turbocharged 3306 for gradual power loss from a boost leak, and treat hard starting or stalling as a fuel filter or transfer-pump issue before suspecting the injection pump. No ECM on this generation, so oil analysis and gauges are the only diagnostics you have.
Corrective and Common Repairs
Dry steering clutches and brake bands wear faster than later oil-bathed designs and need regular band adjustment - uneven braking or wander in reverse usually means a band out of adjustment, not a failed clutch. Low-range clutch packs on the mechanical transmission take the most shock load and slip first; check shift linkage and the modulating valve before condemning a pack. Blade slow to lift traces to cylinder rod seals, a worn control valve spool, or a tired hydraulic pump, roughly in that order.
Overhaul and Rebuild Points
Undercarriage parts - track chain, sprocket segments, idlers, rollers - wear as a set, so full-set replacement at high hours is normal, not a red flag. Final drive bearings are this platform's costliest wear point; owners report bearing service falling due around 8,000 hours, with a worn-smooth drive taper as the warning sign, and a rebuild runs into real money. Steering clutches and dry brake bands are best rebuilt together once adjustment can't compensate for wear. Plan a 3306 inframe or top-end overhaul once oil analysis shows sustained wear trends.
Seasonal and Environment Servicing
In cold climates, check coolant strength and battery/charging condition before winter work - the coolant temperature gauge is your only overheat warning on this generation, so a weak charging system or slipping fan belt shows up fast. In dusty or sandy jobsites, service the air cleaner element on condition rather than the full interval; the restriction indicator is the only air-intake diagnostic available. Forestry or waste-handling duty calls for bolt-on screen guarding over the radiator and front glass plus a belly guard, since this generation predates any factory forestry-package trim.
D6D SR common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 2Y-8670 | Filter As-Fuel | Fuel system service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
D6D SR fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| Coolant Temperature gauge - needle in red zone | Engine coolant temperature above normal operating range | Low coolant level, blocked radiator core or grille screen, slipping or broken fan belt, thermostat stuck closed, sustained overload | Reduce load and let engine idle to cool before shutdown; once cool, check coolant level, belt condition, and radiator core for debris |
| Engine Oil Pressure gauge - needle in low/red zone | Engine oil pressure below the safe minimum | Low oil level, worn oil pump, plugged oil filter, diluted or wrong-viscosity oil | Stop the engine immediately, check oil level and filter condition before restarting; do not run the engine with sustained low pressure |
| Transmission Oil Temperature gauge - needle in red zone | Direct-drive transmission oil overheating | Low transmission oil level, prolonged high sustained load or shock loading, restricted transmission oil cooler | Reduce load, shift to a lower gear or idle to allow cooling, then check transmission oil level and inspect the oil cooler for restriction |
| Charging System (ammeter) - discharge indication | Alternator/generator not charging the battery circuit | Worn or broken drive belt, faulty alternator or regulator, loose or corroded battery/charging connections | Check belt tension and condition, inspect and clean battery and charging system connections, test charging output |
| Air Cleaner service (restriction) indicator | Air intake restriction has reached the service limit | Clogged primary or secondary air filter element, dusty operating conditions | Service or replace the air filter element, then reset the restriction indicator |
| Fuel Level gauge - low reading | Fuel tank level low | Normal consumption approaching empty, or an unexpected leak in the fuel system | Refuel; if the drop in level is faster than normal usage, inspect fuel lines and tank for leaks |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
D6D SR attachments & work tools
Blades
Straight (S) blade for this class runs about 3.2 m (10.5 ft) wide with roughly 3.3 m3 (4.3 yd3) capacity, built for fine grading and penetration in hard-packed material with no side wings. Angling (A) blade hydraulically swings left or right off a C-frame for side-casting and road work; the parts catalog lists straight and angling bulldozer arrangements as separate groups, not interchangeable without the matching linkage. Semi-universal (SU) is a factory option on this size class, giving more load capacity than the straight blade and better penetration than a full-universal blade for mixed dirt/rock work. VPAT (variable-pitch angle/tilt) blade control does not apply to this generation - that system arrived on later medium-dozer platforms; blade control here is conventional hydraulic tilt with mechanical or hydraulic angling.
Rippers
Multi-shank parallelogram ripper (radial linkage) is the common rear attachment for this class, offered in reduced-shank configurations for harder digging conditions. A dedicated single-shank ripper is offered for deep-penetration rock work where more pryout force per tooth is needed versus spreading it across multiple shanks. Ripper assembly weight for this size machine runs roughly 1,400-1,800 kg (3,000-4,000 lb) depending on shank count and beam configuration - varies by supplier and arrangement. The rear ripper mounts to the same subframe/linkage family the parts book uses for other rear implement fitments, so ripper, drawbar and winch are mutually exclusive at the rear mount without swapping brackets.
Winches
A cable-control winch fits at the front or rear of this machine, sized to the tractor's weight class rather than shared with larger D7/D8-class tractors. Period-correct winch suppliers for this dozer class built dedicated drum winches (both front-mount and rear-mount) with wire-rope capacity typically in the 45-90 m range across multiple layers, used for logging skid, pipeline pulling and general recovery work. Winch control is independent of the dozer hydraulic circuit - these are mechanically or hydraulically clutched off the power train, not plumbed into the blade's tilt/lift lines.
Drawbars/counterweights
A rear swinging drawbar group is a factory-catalog option for towing and pull-behind work, separate from the ripper or winch mount and fitted only when neither of those is installed. When a rear ripper or winch is fitted, its own mass typically substitutes for a separate counterweight; a plain drawbar-only rear end can take an add-on counterweight block to balance the machine when running a heavy front blade without a rear implement.
Cab/ROPS guarding options for forestry/waste configs
For forestry or waste-handling duty, this class of Cat dozer commonly gets heavy screen or perforated-plate guarding over the front glass and radiator grille plus a belly guard and brush/rock deflector ahead of the blade, protecting glass and cooling package from branches and debris. Both cab and open ROPS/FOPS canopy configurations exist for this machine; forestry-duty guarding is added on top of the standard rollover/falling-object structure rather than replacing it. This generation predates the badged "forestry package" factory trim used on current-production medium dozers - guarding here is bolt-on sheet/screen kit hardware rather than an integrated factory option line, so exact coverage varies by dealer/region kit.
Hydraulic arrangement notes for front/rear tools
The hydraulic system carries its own tank-and-valve group and gear-type pump feeding the main control valve for blade lift/tilt/angle cylinders, plus a separate auxiliary valve group for external attachment circuits at the rear. Front blade functions run off the main control valve and tilt-cylinder lines; a rear ripper or winch draws off the auxiliary valve group, so the two are not normally run off shared lines without reconfiguring the valve stack. The rear-attachment linkage and cylinder mounting groups in the parts catalog are shared/renamed between bulldozer and ripper fitments, reflecting one common rear subframe design across the different rear tool options.
All D6D SR assemblies by section
Every catalogued assembly group for the Caterpillar D6D SR. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Air Inlet And Exhaust System
7n3884 Lines Gp-Air
| 7N***84 | Air Lines Group | 1 |
7n4100 Lines Gp-Air
| 7N***00 | Air Lines Group | 1 |
5y1503 Ejector Gp-Dust
| 5Y***03 | Dust Ejector Group | 1 |
6n8261 Ejector Gp-Dust
| 6N***61 | Dust Ejector Group | 1 |
5y1482 Air Cleaner Gp
| 5Y***82 | Air Cleaner Group | 1 |
5y1160 Air Cleaner Gp
| 5Y***60 | Air Cleaner Group | 1 |
7n7750 Cartridge Gp-Turbocharger*R
| 7N***50 | Cartridge Group-Turbocharger | 1 |
5y1293 Extension Gp-Air
| 5Y***93 | Extension Group-Air Cleaner | 1 |
4n9586 Fastener Gp-Exhaust Manifold
| 4N***86 | Fastener Group-Exhaust Manifold; Exhaust Manifold Fastener Group | 1 |
2y6493 Lines Gp-Turbocharger Oil
| 2Y***93 | Lines Group-Turbocharger Oil; Turbocharger Oil Lines Group | 1 |
6n0164 Manifold Gp-Exhaust
| 6N***64 | Manifold Group-Exhaust | 1 |
2y9680 Muffler Gp
| 2Y***80 | Muffler Group | 1 |
7n7748 Turbocharger Gp*R
| 7N***48 | Turbocharger Group | 1 |
8n2669 Turbocharger Gp
| 8N***69 | Turbocharger Group; Turbocharger Group | 1 |
Basic Engine
2y2566 Cover Gp-Cylinder Block
| 2Y***66 | Cylinder Block Covers | 1 |
1n4406 Camshaft Gp-Single
| 1N***06 | Camshaft Group-Single; Camshaft Group--Single | 1 |
2p6531 Cover Gp-Cylinder Head
| 2P***31 | Cover Group-Cylinder Head; Cylinder Head Cover Group | 1 |
2y6277 Cover Gp-Front Housing
| 2Y***77 | Cover Group-Front Housing; Front Housing Cover Group | 1 |
8n4745 Cover Gp-Valve Mechanism
| 8N***45 | Cover Group-Valve Mechanism; Valve Mechanism Cover Group | 1 |
2y4517 Crankshaft As*R
| 2Y***17 | Crankshaft As | 1 |
Crankshaft Bearing Replacements
| 8N***25 | Bearing (1.25mm Undersize) | 7 |
| 8N***26 | Bearing (0.51mm Undersize) | 7 |
| 8N***27 | Bearing (0.76mm Undersize) | 7 |
2y5206 Crankshaft Gp
| 2Y***06 | Crankshaft Group; Crankshaft Group | 1 |
7n6550 Cylinder Block As
| 7N***50 | Cylinder Block As | 1 |
1n3576 Cylinder Block Gp
| 1N***76 | Cylinder Block Group | 1 |
7n8016 Cylinder Block Gp*R
| 7N***16 | Cylinder Block Group; Cylinder Block Group | 1 |
7n8876 Cylinder Head Gp*R
| 7N***76 | Cylinder Head Group; Cylinder Head Group | 1 |
2p7838 Damper Gp
| 2P***38 | Damper Group; Damper Group | 1 |
2p8161 Drive Gp-Accessory
| 2P***61 | Drive Group-Accessory; Rear Gear Group-Accessory Drive | 1 |
2p7831 Drive Gp-Fan
| 2P***31 | Drive Group-Fan; Fan Drive Group | 1 |
7n9536 Fastener Gp-Cylinder Head
| 7N***36 | Fastener Group-Cylinder Head; Cylindetr Head Fastener Group | 1 |
2y5717 Fastener Gp-Front Housing
| 2Y***17 | Fastener Group-Front Housing; Front Housing Fastener Group | 1 |
2p6200 Fastener Gp-Engine Oil Pan
| 2P***00 | Fastener Group-Oil Pan; Fastener Gp-Engine Oil Pan | 1 |
7s7875 Flywheel Gp
| 7S***75 | Flywheel Group; Flywheel Group | 1 |
2y8603 Gear Gp-Front Timing
| 2Y***03 | Gear Group-Front; Gear Gp-Front Timing | 1 |
6n2514 Housing Gp-Flywheel
| 6N***14 | Housing Group-Flywheel; Flywheel Housing Group | 1 |
2y8429 Housing Gp-Front
| 2Y***29 | Housing Group-Front | 1 |
7n7858 Lifting Gp-Engine
| 7N***58 | Lifting Group; Lifting Eye Gp-Engine | 1 |
1w2766 Mounting Gp-Engine
| 1B***86 | Bolt-Bracket Assembly To Timing Gear | 8 |
| 1D***14 | Bolt--Front Support To Frame | 2 |
| 1D***17 | Nut-Plate And Angle Assembly To Hydraulic And Fuel Tanks; Nut Plate And Angle Assembly To Hydraulic And Fuel Tanks | 1 |
2p6152 Pan Gp-Oil
| 2P***52 | Pan Group-Oil; Oil Pan Group | 1 |
1w6588 Piston & Rod Gp
| 1W***88 | Piston & Rod Group; Connecting Rod And Piston Group | 1 |
2w1177 Rod & Piston Gp*R
| 2W***77 | Piston & Rod Group; Connecting Rod And Piston Group | 1 |
7n2887 Pulley Gp-Crankshaft
| 7N***87 | Pulley Group-Crankshaft; Crankshaft Pulley Group | 1 |
7n3881 Pulley Gp-Fan
| 7N***81 | Pulley Group-Fan Drive | 1 |
2p6226 Seal Gp-Crankshaft
| 2P***26 | Seal Group-Crankshaft; Seal Group-Crankshaft | 1 |
1w2457 Support Gp-Engine
| 1W***57 | Support Group-Engine; Engine Support Group | 1 |
6n2579 Support Gp-Engine
| 6N***79 | Support Group-Engine; Support Group Engine | 1 |
7n9589 Trunnion Gp-Engine
| 7N***89 | Trunnion Group-Engine | 1 |
7n8026 Valve Mechanism Gp
| 7N***26 | Valve Mechanism Group; Valve Mechanism Group | 1 |
7c7013 Valve Mechanism Gp
| 7C***13 | Valve Mechanism Group | 1 |
Cab, Gauges And Accessories
5y1274 Gauge Gp
| 5Y***74 | Gauge Group | 1 |
8s2541 Indicator Gp-Air Filter Service
| 8S***41 | Indicator Group | 1 |
5n8757 Magnetic Pickup Gp
| 5N***57 | Magnetic Pickup Group; Magnetic Pick-Up Group | 1 |
2y9530 Seat & Support Gp-Part 2 Of 3
| 2Y***30 | Seat & Support Group | 1 |
2y9530 Support & Seat Gp-Part 2 Of 3
| 2Y***30 | Seat & Support Group | 1 |
2y9530 Seat & Support Gp-Part 1 Of 3
| 2Y***30 | Seat & Support Group | 1 |
2y9530 Support & Seat Gp-Part 3 Of 3
| 2Y***30 | Seat & Support Group | 1 |
2y9530 Seat & Support Gp-Part 3 Of 3
| 2Y***30 | Seat & Support Group | 1 |
2y9530 Support & Seat Gp-Part 1 Of 3
| 2Y***30 | Seat & Support Group | 1 |
2y5614 Seat As
| 2Y***51 | Seat As | 1 |
| 2Y***97 | Seat As-Adjustable; Seat Assembly-Adjustable | 1 |
| 2Y***14 | Seat As | 1 |
2y4251 Seat As
| 2Y***51 | Seat As | 1 |
2y5597 Seat As-Adjustable
| 2Y***97 | Seat As-Adjustable; Seat Assembly-Adjustable | 1 |
5y1393 Seat Belt Gp
| 5Y***93 | Seat Belt Group | 1 |
| 8Y***37 | Seat Belt Group | 1 |
2y5468 Seat Belt Gp
| 2Y***68 | Seat Belt Group | 1 |
8y4037 Seat Belt Gp
| 8Y***37 | Seat Belt Group | 1 |
5y1430 Seat Gp
| 2Y***97 | Seat As-Adjustable; Seat Assembly-Adjustable | 1 |
| 5Y***30 | Seat Group | 1 |
2y9927 Tachometer Gp
| 1V***41 | Seal | 5 |
| 2Y***27 | Tachometer Group-Electric | 1 |
| 5N***57 | Magnetic Pickup Group; Magnetic Pick-Up Group | 1 |
Chassis And Undercarriage
7g1774 Floorplate Gp
| 7G***74 | Floorplate Group | 1 |
8p5787 Frame & Case Gp
| 8P***87 | Frame And Case Group | 1 |
7m0668 Bar & Suspension Gp
| 7M***68 | Bar & Suspension Group | 1 |
2y9426 Conversion Ar-Non Rops Mounting
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 4 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 4 |
| 0V***75 | Screw,Cap,Hexagon H Shaft Mtg,Accessory Drive | 4 |
1p3365 Drawbar Gp-Swinging
| 1P***65 | Drawbar Group-Swinging | 1 |
5y1278 Fender Gp
| 5Y***78 | Fender Group | 1 |
2y9393 Track Roller Frame Gp
| 2Y***93 | Frame Group-Track Roller | 1 |
3y2291 Guard As-Radiator
| 3Y***91 | Guard As-Radiator | 1 |
7s1975 Guard Gp-Crankcase
| 7S***75 | Guard Group-Crankcase | 1 |
3y0215 Guard Gp-Radiator
| 3Y***15 | Guard Group-Radiator | 1 |
7g8390 Guard Gp-Track Guiding
| 7G***90 | Guard Group-Track Guide | 1 |
7g8538 Guard Gp-Track Roller
| 7G***38 | Guard Group-Track Roller | 1 |
7m0455 Guard Gp-Frame
| 7M***55 | Guard Group-Track Roller | 1 |
5y1245 Hood & Dash Gp-Part 2 Of 2
| 5Y***45 | Hood & Dash Group | 1 |
5y1245 Hood & Dash Gp-Part 1 Of 2
| 5Y***45 | Hood & Dash Group | 1 |
7b4464 Hook Gp-Front Pull
| 7B***64 | Hook Group-Front Pull | 1 |
5m7739 Idler Gp-Front-Part 2 Of 2
| 5M***39 | Idler Group-Front | 1 |
5m7739 Idler Gp-Front-Part 1 Of 2
| 5M***39 | Idler Group-Front | 1 |
3p1118 Link As-Track
| 3P***18 | Link As-Track | 1 |
3t3206 Roller Gp-Track Carrier
| 3T***06 | Roller Group-Track Carrier | 1 |
9g8034 Roller Gp-Track Double Flange
| 9G***34 | Roller Group-Track-Double Flange; Track Roller Group-Double Flange | 1 |
9g8029 Track Roller Gp-Single Flange
| 9G***29 | Roller Group-Track-Single Flange; Track Roller Group-Single Flange | 1 |
9g6924 Support Gp-Fender
| 9G***24 | Support Group-Fender; Fender Support Group | 1 |
6y6316 Track Gp
| 1S***59 | Bolt 2.15 In. (54.61 mm) Long | 140 |
| 1S***60 | Nut-Track; (3/4-16-Thd) | 140 |
| 3P***18 | Link As-Track | 1 |
3p1142 Track Gp
| 1S***59 | Bolt 2.15 In. (54.61 mm) Long | 140 |
| 1S***60 | Nut-Track; (3/4-16-Thd) | 140 |
| 3P***18 | Link As-Track | 1 |
3p1137 Track Gp
| 1S***60 | Nut-Track; (3/4-16-Thd) | 140 |
| 1W***59 | Bolt-Track | 140 |
| 3P***18 | Link As-Track | 1 |
3p1139 Track Gp
| 1S***60 | Nut-Track; (3/4-16-Thd) | 140 |
| 1W***59 | Bolt-Track | 140 |
| 3P***18 | Link As-Track | 1 |
7g0423 Track Roller Gp-Double Flange
| 7G***23 | Track Roller Group-Double Flange | 1 |
7g0421 Track Roller Gp-Single Flange
| 7G***21 | Track Roller Group-Single Flange | 1 |
Cooling System
8n4457 Base Gp-Eng Oil Filter
| 8N***57 | Base Group-Oil Filter; Base Group-Engine Oil Filter | 1 |
8n4457 Base Gp-Oil Filter
| 8N***57 | Base Group-Oil Filter; Base Group-Engine Oil Filter | 1 |
2w5636 Cooler Gp-Filter Base & Engine Oil
| 2W***36 | Cooler Group-Filter Base & Eng Oil; Filter Base & Engine Oil Cooler Group | 1 |
2w2660 Cooler Gp-Filter Base & Eng Oil
| 2W***60 | Cooler Group-Filter Base & Eng Oil | 1 |
5y2408 Cooler Gp-Implement Oil
| 5Y***08 | Cooler Group-Hydraulic Oil | 1 |
2w6780 Cooler Gp-Transmission Oil
| 2W***80 | Cooler Group-Transmission Oil; Transmission Oil Cooler Group | 1 |
1p7878 Fan & Guard Gp-Blower
| 1P***78 | Fan Group-Blower | 1 |
2p8173 Housing & Regulator Gp
| 2P***73 | Housing & Regulator Group; Regulator And Housing Group | 1 |
2y8079 Lines Gp-Water
| 2Y***79 | Lines Group-Water; Water Lines Group | 1 |
8n4112 Lines Gp-Water
| 8N***12 | Lines Group-Water; -Bypass Relief | 1 |
2w8001 Pump Gp-Water*R
| 2W***01 | Pump Group-Water | 1 |
7n5909 Pump Gp-Water
| 7N***09 | Pump Group-Water; Water Pump Group | 1 |
5y1144 Radiator Gp-Part 2 Of 2
| 5Y***44 | Radiator Group | 1 |
5y1144 Radiator Gp-Part 1 Of 2
| 5Y***44 | Radiator Group | 1 |
Engine Arrangement
5y1001 Engine Ar-Part 1 Of 2
| 1N***06 | Camshaft Group-Single; Camshaft Group--Single | 1 |
| 1P***44 | Breather Group | 1 |
| 2P***05 | Lines Group-Engine Oil; Engine Oil Lines Group | 1 |
5y1001 Engine Ar-Part 2 Of 2
| 1W***57 | Support Group-Engine; Engine Support Group | 1 |
| 1W***88 | Piston & Rod Group; Connecting Rod And Piston Group | 6 |
| 2P***84 | Pump Group-Engine Oil; Engine Oil Pump Group | 1 |
Fuel System And Governor
2y9822 Control Gp-Decelerator
| 2Y***22 | Control Group-Decelerator | 1 |
5y0599 Control Gp-Fuel Ratio-Air
| 5Y***99 | Control Group-Fuel Ratio | 1 |
2y9820 Control Gp-Governor
| 2Y***20 | Control Group-Governor | 1 |
5y0597 Cover As
| 5Y***97 | Cover As | 1 |
2y8670 Filter As-Fuel
| 2Y***70 | Filter As-Fuel | 1 |
5y1324 Filter Gp-Fuel
| 5Y***24 | Filter Group-Fuel | 1 |
5y1647 Filter Gp-Fuel-Secondary
| 5Y***47 | Filter Group-Fuel | 1 |
5y1326 Filter Gp-Fuel
| 5Y***26 | Filter Group-Fuel | 1 |
2y5711 Filter Gp-Fuel
| 2Y***11 | Filter Group-Fuel; Fuel Filter Group | 1 |
2y9337 Flyweight As
| 2Y***37 | Flyweight As | 1 |
5y0590 Governor Gp-Part 2 Of 2
| 5Y***90 | Governor Group | 1 |
5y0590 Governor Gp-Part 1 Of 2
| 5Y***90 | Governor Group | 1 |
2y9764 Lines Gp-Fuel
| 2Y***64 | Lines Group-Fuel | 1 |
5y1415 Lines Gp-Fuel
| 5Y***15 | Lines Group-Fuel | 1 |
2y8366 Lines Gp-Fuel Injection
| 2Y***66 | Lines Group-Fuel Injection | 1 |
2y8362 Lines Gp-Fuel Injection
| 2Y***62 | Lines Group-Fuel Injection | 1 |
2y9522 Lines Gp-Fuel Injection
| 2Y***22 | Lines Group-Fuel Injection | 1 |
2y8363 Lines Gp-Fuel Injection
| 2Y***63 | Lines Group-Fuel Injection | 1 |
5y1309 Pump As-Fuel Transfer
| 5Y***09 | Pump As-Fuel Transfer | 1 |
5y0261 Pump Gp-Fuel Injection-Part 1 Of 2
| 5Y***61 | Pump Group-Fuel Injection | 1 |
5y0261 Pump Gp-Fuel Injection-Part 2 Of 2
| 5Y***61 | Pump Group-Fuel Injection | 1 |
5y0245 Pump Gp-Fuel Transfer
| 5Y***45 | Pump Group-Fuel Transfer | 1 |
5y1315 Pump Gp-Governor, Fuel Injection & Fuel Transfer
| 2Y***97 | Pump As-Fuel Priming | 1 |
| 2Y***57 | Kit-Governor; ( Incl. | 1 |
| 2Y***59 | Kit-Fuel Injection Pump | 1 |
5y1315 Pump Gp-Governor, Fuel Injection & Transfer- Part 2 Of 2
| 5Y***15 | Pump Group-Gov, Fuel Inj & Tfr; Pump Gp-Governor, Fuel Injection & Tfr | 1 |
5y1315 Pump Gp-Governor, Fuel Injection & Transfer-Part 3 Of 3
| 5Y***15 | Pump Group-Gov, Fuel Inj & Tfr; Pump Gp-Governor, Fuel Injection & Tfr | 1 |
5y1315 Pump Gp-Governor, Fuel Injection & Transfer-Part 1 Of 2
| 5Y***15 | Pump Group-Gov, Fuel Inj & Tfr; Pump Gp-Governor, Fuel Injection & Tfr | 1 |
5y1142 Pump Gp-Governor, Fuel Injection & Fuel Transfer
| 5Y***45 | Pump Group-Fuel Transfer | 1 |
| 5Y***61 | Pump Group-Fuel Injection | 1 |
| 5Y***90 | Governor Group | 1 |
5y1340 Shim Gp-Flange
| 2Y***61 | Shim--0.10 mm (0.004 In. Thick) | 3 |
| 2Y***62 | Shim--0.12 mm (0.005 In. Thick) | 3 |
| 2Y***63 | Shim--0.14 mm (0.006 In. Thick) | 3 |
2y6158 Shim Gp
| 2Y***83 | Shim--10 mm (0.40 In. Thick) | 6 |
| 2Y***84 | Shim--11 mm (0.45 In. Thick) | 6 |
| 2Y***85 | Shim--13 mm (0.50 In. Thick) | 6 |
5y1345 Shim Gp-Front Bearing
| 2Y***31 | Shim--0.5 mm (0.002 In. Thick) | 1 |
| 2Y***32 | Shim--0.7 mm (0.028 In. Thick) | 1 |
| 2Y***33 | Shim--0.9 mm (0.035 In. Thick) | 1 |
5y1350 Shim Gp-Rear Bearing
| 2Y***47 | Shim--1.2 mm (0.047 In. Thick) | 3 |
| 2Y***48 | Shim--1.5 mm (0.060 In. Thick) | 3 |
| 2Y***49 | Shim--1.8 mm (0.071 In. Thick) | 3 |
9g4712 Tank Gp-Fuel
| 9G***12 | Tank Group-Fuel | 1 |
Hydraulic System
3g3446 Valve Gp-Control
| 3G***46 | Control Valve Group | 1 |
8p4645 Lines Gp-Hydraulic
| 8P***45 | Hydraulic Lines Group | 1 |
8p4638 Control & Mounting Gp
| 8P***38 | Mounting And Control Group; Mounting And Control Group | 1 |
9g9288 Cover Gp-Protection
| 9G***88 | Protection Cover Group; -Hydraulic Tank-Steering Tank Fill Cap-Hydraulic Tank Fill Cap | 1 |
9t0175 Valve Gp
| 9T***75 | Valve Group | 1 |
3g3142 Valve Gp
| 3G***42 | Valve Group | 1 |
5y1287 Control Ar-Hydraulic
| 3G***68 | Pump Group-Gear; Gear Pump Group | 1 |
| 4J***87 | Valve Group-Auxiliary; Valve Group--External Auxiliary | 1 |
| 5Y***68 | Tank & Valve Group; Tank & Valve Gp-Hydraulic | 1 |
5y1517 Control Ar-Hydraulic
| 3G***42 | Valve Group | 1 |
| 3G***68 | Pump Group-Gear; Gear Pump Group | 1 |
| 5Y***15 | Lines Group-Rear Attachment | 1 |
5y1286 Control Ar-Hydraulic
| 3G***68 | Pump Group-Gear; Gear Pump Group | 1 |
| 4J***87 | Valve Group-Auxiliary; Valve Group--External Auxiliary | 1 |
| 5Y***86 | Control Ar-Hydraulic | 1 |
2y8590 Cylinder Ar-Tilt
| 2Y***90 | Cylinder Ar-Tilt | 1 |
7j8302 Cylinder Gp-Lift-2 Required
| 7J***02 | Cylinder Group; Hydraulic Lift Cylinder Group | 1 |
2j1402 Cylinder Gp-Hydraulic
| 2J***02 | Cylinder Group-Hydraulic; Hydraulic Tilt Cylinder Group (Type 6) | 1 |
9p4336 Lines Gp-Bulldozer
| 9P***36 | Lines Group-Bulldozer; Bulldozer Lines Group | 1 |
8p3363 Lines Gp-Dozer
| 8P***63 | Lines Group-Dozer; Bulldozer Lines Group | 1 |
8p4167 Lines Gp-Pump
| 8P***67 | Lines Group-Pump; Pump Lines Group | 1 |
5y1515 Lines Gp-Rear
| 5Y***15 | Lines Group-Rear Attachment | 1 |
5y1290 Lines Gp-Rear Implement-Part 2 Of 2
| 5Y***90 | Lines Group-Rear Attachment | 1 |
5y1290 Lines Gp-Rear Implement-Part 1 Of 2
| 5Y***90 | Lines Group-Rear Attachment | 1 |
9p0477 Lines Gp-Tilt Cylinder
| 9P***77 | Lines Group-Tilt Cylinder; Tilt Cylinders Lines Group | 1 |
8p5040 Linkage Gp-Implement
| 8P***40 | Linkage Group-Implement; Implement Linkage Group--Ripper | 1 |
8p5039 Linkage Gp-Implement
| 8P***39 | Linkage Group-Implement; Implement Linkage Group-Bulldozer & Tilt | 1 |
5y1521 Linkage Gp-Implement
| 5Y***21 | Linkage Group-Implement | 1 |
8p5038 Linkage Gp-Implement
| 8P***38 | Linkage Group-Implement; Implement Linkage Group--Bulldozer | 1 |
5y1520 Linkage Gp-Implement
| 5Y***20 | Linkage Group-Implement | 1 |
9j2697 Mounting Gp-Cylinder
| 9J***97 | Mounting Group-Cylinder; Cylinder Mounting Group | 1 |
8p4157 Mounting Gp-Hydraulic Tank
| 8P***57 | Mounting Group-Hydraulic Tank; Hydraulic Tank And Mounting Group | 1 |
3g4768 Pump Gp-Gear
| 3G***68 | Pump Group-Gear; Gear Pump Group | 1 |
9t0492 Tank & Valve Gp-Hydraulic-Part 2 Of 2
| 9T***92 | Tank & Valve Group; Tank & Valve Gp-Hydraulic | 1 |
9t0492 Tank & Valve Gp-Hydraulic-Part 1 Of 2
| 9T***92 | Tank & Valve Group; Tank & Valve Gp-Hydraulic | 1 |
5y0868 Tank & Valve Gp-Hydraulic-Part 2 Of 2
| 5Y***68 | Tank & Valve Group; Tank & Valve Gp-Hydraulic | 1 |
5y0868 Tank & Valve Gp-Hydraulic-Part 1 Of 2
| 5Y***68 | Tank & Valve Group; Tank & Valve Gp-Hydraulic | 1 |
4j0487 Valve Gp-Auxiliary
| 4J***87 | Valve Group-Auxiliary; Valve Group--External Auxiliary | 1 |
9t0176 Valve Gp-Control
| 9T***76 | Valve Group-Control | 1 |
4t7598 Valve Gp-Relief-Pilot Operated
| 4T***98 | Valve Group-Relief; Valve Gp-Relief-Pilot Operated | 1 |
4t4065 Valve Gp-Relief-Pilot Operated
| 4T***65 | Valve Group-Relief; Valve Gp-Relief-Pilot Operated | 1 |
3g8078 Valve Gp-Relief-Pilot Operated
| 06***39 | Seal-O-Ring | 1 |
| 3G***26 | Nut; (3/8-40-Thd) | 1 |
| 3G***54 | Cap | 1 |
Implements
9j8528 Blade Gp-Angling
| 9J***28 | Blade Group-Angling; Blade Group-Angling | 1 |
8j4657 Blade Gp-Straight
| 8J***57 | Blade Group-Straight | 1 |
9j9150 Brace Gp-Bulldozer
| 9J***50 | Brace Group-Bulldozer; Brace Group-Bulldozer | 1 |
2y4652 Bulldozer Ar
| 2Y***85 | Transfer--Address | 1 |
| 2Y***52 | Bulldozer Ar; Bulldozer Arrangement--Straight | 1 |
| 2Y***90 | Plate-Serial Number; (Bulldozer) | 1 |
2y7001 Bulldozer Ar
| 2Y***85 | Transfer--Address | 1 |
| 2Y***01 | Bulldozer Ar-Angling; Bulldozer Arrangement--Angling | 1 |
| 2Y***90 | Plate-Serial Number; (Bulldozer) | 1 |
2y4364 Bulldozer Ar-Angling
| 2Y***85 | Transfer--Address | 1 |
| 2Y***64 | Bulldozer Ar-Angling | 1 |
| 2Y***90 | Plate-Serial Number; (Bulldozer) | 1 |
5y1519 Bulldozer Ar-Straight
| 2Y***90 | Cylinder Ar-Tilt | 1 |
| 2Y***90 | Plate-Serial Number; (Bulldozer) | 1 |
| 3J***59 | Push Arm & Brace Group; Push Arm And Brace Group | 1 |
2y4469 Bulldozer Ar-Straight
| 2Y***85 | Transfer--Address | 1 |
| 2Y***69 | Bulldozer Ar-Straight | 1 |
| 2Y***90 | Plate-Serial Number; (Bulldozer) | 1 |
9j9469 Frame Gp-C
| 9J***69 | C-Frame Group | 1 |
5y1878 Linkage & Cylinder Gp
| 2Y***90 | Cylinder Ar-Tilt | 1 |
| 5Y***20 | Linkage Group-Implement | 1 |
| 5Y***78 | Cylinder Ar-Tilt; Linkage & Cylinder Gp | 1 |
3j4359 Arm & Brace Gp-Push
| 3J***59 | Push Arm & Brace Group; Push Arm And Brace Group | 1 |
4j2848 Trunnion Gp
| 4J***48 | Trunnion Group; Bulldozer Trunnion Group | 1 |
Lubrication System
1p4244 Breather Gp-Crankcase
| 1P***44 | Breather Group | 1 |
4n5139 Filler Gp-Oil
| 4N***39 | Filler Group-Oil | 1 |
2y6278 Fumes Disposal Gp
| 2Y***78 | Fumes Disposal Group; Fumes Disposal Group | 1 |
2y8416 Gauge Gp-Oil Level
| 2Y***16 | Gauge Group-Oil Level (Dipstick) | 1 |
2p6105 Lines Gp-Engine Oil
| 2P***05 | Lines Group-Engine Oil; Engine Oil Lines Group | 1 |
2y9492 Lines Gp-Inject Pump Lube Oil
| 2Y***92 | Lines Group-Lube Oil; Lines Gp-Injection Pump Lube Oil | 1 |
4p4020 Pump Gp-Engine Oil
| 4P***20 | Pump Group-Engine Oil; Pump Group-Engine Oil | 1 |
4w2448 Pump Gp-Engine Oil*R
| 4W***48 | Pump Group-Engine Oil; Pump Gp-Engine Oil Gear | 1 |
2p1784 Pump Gp-Engine Oil
| 2P***84 | Pump Group-Engine Oil; Engine Oil Pump Group | 1 |
6n2642 Pump Gp-Engine Oil-Type 2
| 6N***42 | Pump Group-Engine Oil | 1 |
6n2642 Pump Gp-Engine Oil-Type 1
| 0S***90 | Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As) | 1 |
| 1P***46 | Washer-Hard; (10.2x35x6-mm Thk) | 1 |
| 4W***48 | Pump Group-Engine Oil; Pump Gp-Engine Oil Gear | 1 |
Power Train-Power Transmission Unit
8p5366 Control Gp-Flywheel Clutch
| 8P***66 | Flywheel Clutch Control Group | 1 |
8p1672 Valve Gp-Relief
| 8P***72 | Relief Valve Group | 1 |
2y9457 Clutch Gp-Flywheel-Part 2 Of 3
| 2Y***57 | Clutch Group-Flywheel | 1 |
2y9457 Clutch Gp-Flywheel-Part 1 Of 3
| 2Y***57 | Clutch Group-Flywheel | 1 |
2y9457 Clutch Gp-Flywheel-Part 3 Of 3
| 2Y***57 | Clutch Group-Flywheel | 1 |
9n4719 Control Gp-Gearshift-Part 1 Of 2
| 9N***19 | Control Group-Gearshift | 1 |
9n4719 Control Gp-Gearshift-Part 2 Of 2
| 9N***19 | Control Group-Gearshift | 1 |
5y1261 Control Gp-Gearshift-Part 2 Of 2
| 5Y***61 | Control Group-Gearshift | 1 |
5y1261 Control Gp-Gearshift-Part 1 Of 2
| 5Y***61 | Control Group-Gearshift | 1 |
1015207 Cover Gp-Transmission
| 0T***02 | Bolt; (3/8-16x0.625-In)(Shield To Head) | 2 |
| 10***06 | Cover | 1 |
| 10***07 | Cover Group-Transmission | 1 |
3s1741 Filter Gp
| 3S***41 | Filter Group | 1 |
2y6932 Final Drive Gp-Part 3 Of 3
| 2Y***32 | Final Drive Group | 1 |
2y6932 Final Drive Gp-Part 1 Of 3
| 2Y***32 | Final Drive Group | 1 |
2y6932 Final Drive Gp-Part 2 Of 3
| 2Y***32 | Final Drive Group | 1 |
2y8507 Lines Gp-Powertrain Oil-Part 1 Of 2
| 2Y***07 | Lines Group-Power Train Oil | 1 |
2y8507 Lines Gp-Powertrain Oil-Part 2 Of 2
| 2Y***07 | Lines Group-Power Train Oil | 1 |
9s6590 Pump Gp-Clutch Oil
| 9S***90 | Pump Group-Clutch Oil | 1 |
3p6814 Pump Gp-Gear
| 3P***14 | Pump Group-Gear | 1 |
9m8669 Screen Gp-Magnetic
| 9M***69 | Screen Group-Magnetic; -Differential Lock | 1 |
8p8914 Sprocket Gp-Segmented
| 8P***14 | Sprocket Group-Segmented | 1 |
5y1280 Transmission Gp
| 5Y***80 | Transmission Group | 1 |
9n4722 Transmission Gp
| 9N***22 | Transmission Group-Direct Drive | 1 |
1015209 Transmission Gp-Direct Drive
| 10***07 | Cover Group-Transmission | 1 |
| 10***09 | Transmission Group-Direct Drive | 1 |
| 9N***22 | Transmission Group-Direct Drive | 1 |
2y6472 Universal Joint Gp
| 2Y***72 | Universal Joint Group | 1 |
Service Equipment And Supplies
Name Plates And Films
| 2Y***68 | Plate-Serial Number-Engine | 1 |
| 2Y***85 | Transfer--Address | 1 |
| 2Y***40 | Plate-Engine Information-Portuguese | 1 |
Starting And Electrical System
6n9294 Alternator Gp-Charging
| 3T***52 | Alternator Group-Charging | 1 |
| 6N***94 | Alternator Group; (24-Volt, 35-Ampere) | 1 |
| 7N***20 | Alternator Group; Alternator Group (Robert Bosch) | 1 |
7n9720 Alternator Gp-Charging
| 7N***20 | Alternator Group; Alternator Group (Robert Bosch) | 1 |
5y1826 Alternator Gp
| 5Y***26 | Alternator Group-Charging | 1 |
2y8950 Alternator Gp
| 2Y***50 | Alternator Group-Charging | 1 |
6n5468 Alternator Gp-Charging
| 6N***68 | Alternator Group-Charging | 1 |
3t6352 Alternator Gp-Charging-Part 2 Of 2
| 3T***52 | Alternator Group-Charging | 1 |
5y1527 Alternator Gp-24 Volt, 35 Ampere
| 2L***54 | Terminal-Ring; (6-Ga, 1/2-In Screw) | 1 |
| 5Y***27 | Alternator Group-Charging | 1 |
| 6N***68 | Alternator Group-Charging | 1 |
9g4574 Alternator Gp-Charging
| 9G***74 | Alternator Group-Charging; Alternator Group (Nippondenso) | 1 |
2y8310 Alternator Gp
| 2Y***10 | Alternator Group-Charging | 1 |
3t6352 Alternator Gp-Charging-Part 1 Of 2
| 3T***52 | Alternator Group-Charging | 1 |
5y1700 Alternator Gp
| 5Y***00 | Alternator Group-Charging | 1 |
2y8880 Battery & Wiring Gp-Part 2 Of 2
| 2Y***80 | Battery & Wiring Group | 1 |
2y8880 Battery & Wiring Gp-Part 1 Of 2
| 2Y***80 | Battery & Wiring Group | 1 |
2y4477 Lamp Gp-Flood
| 2Y***77 | Lamp Group-Flood | 1 |
8p6568 Lighting Gp
| 8P***68 | Lighting Group | 1 |
5y0956 Solenoid Gp-Control
| 5Y***56 | Solenoid Group-Control | 1 |
5y0026 Start Gp-Neutral
| 5Y***26 | Start Group-Neutral | 1 |
2y1921 Starting Motor Gp-Electric
| 2Y***21 | Starting Motor Group-Electric | 1 |
2y1920 Starting Motor Gp-Electric
| 2Y***20 | Starting Motor Group-Electric | 1 |
7n0718 Switch As-Disconnect
| 7N***18 | Switch As-Disconnect; -Battery-Ground Level | 1 |
2y8441 Switch As-Disconnect
| 2Y***41 | Switch As-Disconnect | 1 |
9w1077 Switch As-Start
| 9W***77 | Switch As-Start; -Heat-Remote | 1 |
9n4721 Switch Gp-Manual
| 9N***21 | Switch Group-Neutral Start | 1 |
5y1277 Switch Gp-Slave
| 5Y***77 | Switch Group-Slave | 1 |
5y0269 Wiring Gp-Sensor
| 5Y***69 | Wiring Group-Sensor | 1 |
Steering Clutches And Brakes
7g7419 Brake Gp-Steering-Part 3 Of 3
| 7G***19 | Steering Brake Group | 1 |
7g7419 Brake Gp-Steering-Part 1 Of 3
| 7G***19 | Steering Brake Group | 1 |
7g7419 Brake Gp-Steering-Part 2 Of 3
| 7G***19 | Steering Brake Group | 1 |
8p5200 Control Gp-Steering Clutch-Part 1 Of 2
| 8P***00 | Steering Clutch Control Group | 1 |
8p5200 Control Gp-Steering Clutch-Part 2 Of 2
| 8P***00 | Steering Clutch Control Group | 1 |
9m8068 Band & Lining As-Brake*R
| 9M***68 | Band & Lining As-Brake | 1 |
2y7014 Clutch Gp-Steering
| 2Y***14 | Clutch Group-Steering | 1 |
8p1216 Mechanism Gp-Brake-Part 2 Of 2
| 8P***16 | Mechanism Group-Brake | 1 |
8p1216 Mechanism Gp-Brake-Part 1 Of 2
| 8P***16 | Mechanism Group-Brake | 1 |
3t8204 Valve Gp-Control
| 3T***04 | Valve Group-Control | 1 |
D6D SR serial number reference
On a D6D-era Cat track-type tractor the PIN/serial plate is riveted up high on the rear of the left frame rail, and can be hidden behind a rear ripper mount, so clean off dirt and grease to read it; the number is often duplicate-stamped on the mainframe near the operator's seat as a backup. The first three characters are the serial number prefix, which identifies the model and build configuration (for example 7XF ties to the D6D SR direct-drive tractor); the digits after the prefix are the sequential machine number within that build run.
| Prefix | Identifies | Notes |
|---|---|---|
| 7XF | D6D SR (Direct Drive) | Direct-drive D6D SR track-type tractor, powered by the Caterpillar 3306 diesel, with steering clutches and brakes (not differential steering). Parts documentation covers 7XF00001 and up. No separate powershift or LGP/XL SR-specific prefix turned up — the SR line appears to run on this one serial break. Confirm exact break with your dealer before ordering parts. |
Frequently asked questions
What engine does the Caterpillar D6D SR use?
A Caterpillar 3306 inline diesel, turbocharged. Gross power is rated at roughly 104 kW (140 hp) at the flywheel. The wider D6D family also included naturally aspirated versions rated closer to 93 kW (125 hp) for other applications, so confirm aspiration and rating against your machine's own data plate.
What is the operating weight of the Caterpillar D6D SR?
Not separately published for the SR configuration. Reference figures for the D6D family vary widely by source and equipment, from roughly 9.2 tonnes (20,000 lb) for a base/stripped machine up to about 17.4 tonnes (38,300 lb) fully equipped or in wide-track trim. Treat this as a broad reference range rather than a fixed number and check the nameplate on your specific unit.
What replaced the Caterpillar D6D SR?
Caterpillar's direct-drive line continued from the D6D SR into the D6E SR and D6F SR before the mechanical direct-drive configuration was phased out around the D6G SR generation. The parallel powershift D6D nameplate was eventually succeeded by the D6G. Both paths trace back to the same D6D-era chassis and implement family introduced in 1977.
What D6D SR owners discuss
What engine does the D6D SR run, and do owners report different power ratings?
Powered by the Cat 3306 diesel, mechanically governed with no engine control module. Naturally aspirated builds are rated around 93 kW (125 hp); turbocharged builds run closer to 104 kW (140 hp) at the flywheel. Which rating a given machine carries depends on configuration and market — output varies by configuration/series, so treat published horsepower as a range rather than one fixed number. Owners describe the block as simple and durable. Typical wear points are the injection-pump governor (flyweights and races wear over time and can restrict fuel delivery) and, on turbo units, boost leaks that show up as gradual power loss. Hard starting or stalling after startup is usually traced to a plugged fuel filter or low transfer-pump pressure, not the injection pump itself.
What's the most common transmission complaint on these machines?
First (low) gear clutch pack wear tops the list. That pack handles both forward and reverse and takes the most shock loading in this direct-drive mechanical transmission, so it slips or loses pressure before the others. Typical symptom: the selector moves out of neutral but the machine doesn't move, or forward gears feel weak while reverse still works fine. Before condemning the clutch packs, owners check shift linkage adjustment and clutch-pack hydraulic pressure at the control valve. Trans oil pressure should be checked hot and under load — many no-move complaints trace back to low pressure across all forward gears rather than one bad clutch.
Blade is slow to lift or won't hold up. What do owners check first?
Standard order: fluid level and visible leaks first, then the lift cylinder rods for scoring or a leaking rod seal — capping the line at one cylinder and watching whether the blade still drifts down isolates a cylinder problem from a valve problem. Next is the control valve spool for binding or wear, and finally the hydraulic pump, which shows up as slow lift under load when it's worn. If a teardown turns up metal in the filter or tank, owners recommend opening every cylinder and valve section and flushing the full system rather than just swapping the failed part, since contamination circulates through the whole circuit.
What undercarriage wear pattern should I expect on a D6D SR?
Typical high-hour wear: track chain, sprocket segments, front idlers, top carrier rollers and bottom rollers wear as a set over the undercarriage's life, so replacement of the whole set on a well-used machine is normal rather than a red flag. Final drive bearings are a known wear point — several owners report bearing service falling due around the 8,000-hour mark, with worn-smooth machining marks on the drive taper as one visible warning sign. A full final drive rebuild runs into real money in parts and shop time, so undercarriage and final drive condition drive resale value on this model at least as much as engine hours do.
Steering feels inconsistent, or the brake doesn't hold the same in both directions. Why?
The D6D's steering clutches and brakes are dry, not oil-bathed, so they wear faster than later elevated-sprocket models and need periodic band adjustment to stay even side to side. A brake that engages backing up but not going forward, or steering that wanders (especially in reverse), is usually an out-of-adjustment brake band rather than a failed clutch — owners check band adjustment via the rear access covers before assuming clutch failure. Because loss of steering or braking on a track machine is a safety issue, have your dealer verify clutch and brake adjustment and lining condition before returning the machine to grading or slope work.
Gauges are dead or acting erratically. What's the usual cause?
Rarely the gauge itself. Owners trace most dash faults to corroded or loose connectors in the wiring harness behind the panel, or a poor ground splice feeding the cluster — cleaning and reseating connectors resolves most intermittent gauge complaints. The battery box relay and fuse panel is another common corrosion point that can starve the gauge circuit and is worth checking any time the whole cluster misbehaves rather than just one gauge. A single dead gauge points to that sender or its wiring; a cluster-wide fault points to grounds or the fuse/relay panel.
What should I check before buying a used D6D SR?
Run the machine until engine, transmission and hydraulics are fully hot. Problems that don't show cold — a weak forward clutch, slow blade response, hesitation shifting between forward and reverse — often only appear once everything is up to temperature. On the undercarriage, check pin-to-pin wear across several links rather than just one, inspect rollers for flat spots or leaking seals, and check both sprockets for seal leakage at the final drive. Cylinder rods should have a clean mirror finish with no scoring or weeping. Blade cutting-edge wear should be even side to side; uneven wear points to alignment or steering clutch issues rather than normal use. Weigh undercarriage and final drive condition at least as heavily as the hour meter reading, and confirm the meter itself hasn't been swapped or reset. Given how easily steering, brake, or final drive wear can be masked on a machine this age, have your dealer verify undercarriage, final drive, and brake condition before you finalize a purchase.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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