Caterpillartrack-type tractor
Caterpillar D9N
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar D9N is a large track-type tractor built from 1987 to 1996, sized between the D8 and D10 classes in Cat's crawler dozer lineup. It replaced the D8L when Caterpillar renumbered its large-dozer range in 1987, taking over the D9 nameplate previously carried by the higher-horsepower D9L. Power comes from a mechanically governed Cat 3408 DITA V8 diesel, a turbocharged and aftercooled 18.0 L engine rated at roughly 370-377 hp (276-281 kW) gross, driving through a planetary powershift transmission with steering clutch and brake final drives rather than differential steering. Standard operating weight runs about 42.5-43.6 t (93,800-96,100 lb), with the reinforced WDA waste/landfill configuration at roughly 46.8 t. Standard fitment is a semi-universal (S) blade, 4.33 m wide with 11.9 m3 capacity; the machine was also offered with single- or multi-shank rippers and a rear-mounted winch.
All D9N production shares the elevated-sprocket undercarriage architecture inherited from the D9L, keeping the final drives and sprockets clear of ground-level impact and packed material, a layout Caterpillar carried forward through the D9R and D9T that followed. Within the N-series run, the main configuration split is the standard machine versus the reinforced WDA variant, which adds guarding and structure for landfill and waste-handling duty rather than a different engine or drivetrain. In 1996 the D9N was succeeded by the D9R, which moved to the HEUI-injected 3408E engine, and later by the D9T with a C18 ACERT engine, both electronically controlled machines that make the D9N the last fully mechanical, non-ECM tractor in this size class. That mechanical simplicity, paired with a still-active worldwide parts and rebuild network for the 3408 engine and its powershift and final-drive components, keeps the D9N in demand on the used market for buyers who want a rugged, field-serviceable big dozer without electronic engine controls.
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 D9N specifications
Engine
| Engine model | Cat 3408 turbocharged, direct-injection diesel |
| Displacement | 18.0 L (1,098.5 cu in) |
| Flywheel/gross power | 276-281 kW (370-377 hp); published figures vary slightly by source and rounding, core rating centers on about 280 kW (375 hp) |
| Emissions certification | Predates off-highway emissions tier regulation; this 1987-1996 production run has no EPA/EU Tier rating |
| Engine generation note | One engine generation documented across the D9N run; no mid-production engine change found tied to this nameplate in available records |
Weights
| Standard operating weight | 42.5-43.6 t (93,800-96,100 lb); varies by source and fitted equipment (blade, ripper, cab type) |
| Waste Disposal Arrangement (WDA) operating weight | about 46.8 t (103,200 lb) for the landfill/waste-handling package, heavier than standard due to added guarding and a larger blade |
| Configuration coverage | Standard track-type tractor and WDA (waste/landfill) package are the configurations documented; no separate XL or LGP variant found published for this nameplate |
Dimensions
| Overall length with blade | 6.87-6.89 m (22.5-22.6 ft) |
| Overall length, bare tractor (no blade) | 5.17-5.18 m (17.0 ft) |
| Width over tracks | 2.89-2.90 m (9.49-9.5 ft) |
| Height to cab/ROPS top | 3.91-3.93 m (12.83-12.9 ft) |
| Ground clearance | 0.51-0.52 m (1.66-1.70 ft) |
| Track length on ground | 3.47 m (11.39 ft) |
| Track gauge (centerline to centerline) | 2.25 m (7.39 ft) |
| Standard track shoe width | 610 mm (24.0-24.1 in) |
| Ground contact area (standard shoe) | about 4.24 m² (6,572 in²) |
Performance
| Transmission | Powershift, forward and reverse speed ranges |
| Travel speed, forward (top range) | 11.7-12.2 km/h (7.3-7.6 mph) |
| Travel speed, reverse (top range) | 14.6-15.0 km/h (9.1-9.3 mph) |
| Ground pressure, standard shoe | 98.5-98.6 kPa (14.28-14.3 psi) |
| Drawbar pull | Not consistently published for this exact model in available spec aggregators; treat as a dealer-verify item rather than a confirmed figure |
| Gradeability | Not documented in available public spec sources for this model; verify with dealer/operator manual |
| Hydraulic system relief pressure | about 18.6 MPa (2,700 psi) |
| Hydraulic pump flow | about 310 L/min (81.9 US gpm) |
Blades
| Standard blade type | S (semi-universal) blade with hydraulic tilt |
| Standard blade width | 4.33 m (14.2 ft) |
| Standard blade height | 1.81 m (71.3 in) |
| Standard blade capacity | 11.9 m³ (15.6 yd³) |
| Blade maximum cutting depth | 610-620 mm (24.1-24.4 in) |
| WDA package blade | Larger U-type blade fitted for waste/landfill handling; a specific capacity figure appears in only one aggregator source and looks disproportionate versus the standard-blade data, so it is not published here with confidence — verify with dealer for the exact WDA blade capacity |
Service capacities
| Fuel tank | 792 L (209.3 US gal) |
| Hydraulic system fluid | 89.3 L (23.6 US gal) |
| Engine oil (crankcase) capacity | Not documented in available public spec sources for this exact model — check the engine service manual or dealer for the fill quantity |
| Cooling system capacity | Not documented in available public spec sources for this exact model — check the service manual or dealer for the fill quantity |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
D9N fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | Approx. 76 L (20 US gal / 16.7 UK gal) per oil-and-filter change, based on the Cat 3408 V8 diesel used across this era's Cat track-type tractors. An exact D9N-specific crankcase figure was not found in public specification sources - confirm against the machine's own OMM refill chart. | Cat DEO (Diesel Engine Oil). Viscosity grade selected by expected ambient temperature at cold start per Cat's engine-oil viscosity table for this engine generation - typically a 15W-40 multigrade for temperate ranges, lighter multigrades (e.g. 0W or 5W base) for sustained sub-zero starting, straight 30 or 40 grade in consistently hot climates. |
| Cooling system | Approx. 114 L (30 US gal / 25 UK gal), based on the 3408 engine platform shared across this era's Cat D8/D9-class track-type tractors. Exact D9N radiator/system volume is not documented for this specific model - treat as a planning figure only and verify with the OMM or a dealer. | Cat conventional heavy-duty ethylene-glycol coolant/antifreeze mixed to the ratio specified for the 3408 engine. (Extended Life Coolant was not yet Caterpillar's standard factory fill for machines of this vintage; confirm which coolant type the specific machine's cooling system was converted to, if serviced later in life.) |
| Fuel tank | 792 L (209.3 US gal / 174.3 UK gal). | No. 2-D diesel fuel for normal service; No. 1-D diesel recommended in cold-start climates. Fuel sulfur content and cetane number per Cat's fuel specification for the 3408 engine. |
| Powershift transmission (torque divider and transmission case) | Not documented in available public specification sources for this model - refer to the machine's OMM refill-capacities chart or a Cat dealer for the exact figure. | Cat TDTO (Transmission and Drive Train Oil), meeting Cat's TO-4 performance specification. TDTO is offered in multiple viscosity grades (commonly SAE 10W, 30, and 50); grade is selected by expected ambient operating temperature per Cat's fluid viscosity guidance. |
| Bevel gear and steering clutch compartment | Not documented in available public specification sources for this model - refer to the OMM or a Cat dealer. This is a separate compartment from the transmission case on this generation of Cat track-type tractor, which uses steering clutches and brakes (not differential steering). | Cat TDTO (TO-4), same specification as the transmission and final drives. |
| Final drives (each side) | Not documented in available public specification sources for this model - refer to the OMM or a Cat dealer. Each final drive is a separate compartment serviced individually. | Cat TDTO (TO-4). |
| Hydraulic system / tank (blade and implement circuit) | 89 L (23.6 US gal / 19.6 UK gal). | Cat HYDO hydraulic oil is Caterpillar's standard recommendation for this era of machine. Cat TDTO is an approved alternate on Cat machines of this generation where a shared power-train/hydraulic-type fluid is specified. Viscosity grade selected by expected ambient temperature per Cat's fluids viscosity guidance. |
| Pivot shaft | Grease-lubricated fitting - no bulk refill volume; serviced with a grease gun at the OMM's scheduled interval rather than a sump fill. Confirmed as a distinct lubrication point on the D9N chassis/undercarriage. | Cat Multipurpose Grease (NLGI Grade 2). |
| Grease points (track roller frame, idlers, equalizer bar, blade linkage, and other chassis fittings) | Not a refill volume - lubricated via grease fittings per the OMM's scheduled interval. | Cat Multipurpose Grease (NLGI Grade 2) for standard chassis and low-load fittings. Caterpillar's extreme-application (moly-fortified EP) grease is specified for high-load pin and bushing joints where called out in the OMM - confirm the point-by-point grease callout against the machine's own manual. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar D9N maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 3,000 h |
|
| Every 6,000 h |
|
| Every 12,000 h |
|
Servicing the D9N beyond the schedule
Predictive Maintenance & Fluid Analysis
Pull S.O.S samples from the 3408 DITA, powershift transmission, both final drives, and the hydraulic tank at every 250-hour service. Track soot and TBN trends in engine oil to catch injector or ring wear before the mechanical unit injectors foul; watch final-drive samples for planetary wear metal since these carry full driveline torque through the steering clutches. Coolant analysis matters more on this generation because the 3408 has no ECM to flag overheating early; catch corrosion inhibitor depletion before it pits the wet-sleeve cylinder liners.
Corrective & Common Repairs
Steering clutch and brake wear is the D9N's most common driveline complaint; slipping or grabby turns usually trace to worn clutch packs or out-of-adjustment brake bands rather than the transmission itself. On the engine side, watch for unit-injector fouling and turbocharger shaft play on the 3408 DITA, both typical of high-hour mechanical big-bore diesels. Elevated-sprocket final drive seals are a frequent leak point given their ground clearance is high but dirt exposure is constant; reseal early rather than let contamination reach the planetary gears.
Overhaul & Rebuild Points
Plan transmission and torque converter rebuilds around wear in the powershift clutch packs and converter stator, typically the first major driveline component to need attention on a working D9N. Elevated-sprocket final drives and steering clutch/brake packs are the next tier, since they carry all propulsion and steering load with no differential to share it. On the engine, the 3408 DITA's wet-sleeve liners, main bearings, and turbocharger cartridge are the standard in-frame overhaul items; track compression and blow-by trends from oil samples to time the rebuild before contamination spreads.
Seasonal & Environment Servicing
In cold climates, use an ether starting aid and a block heater before cranking the 3408 DITA, since its mechanical injection has no glow-plug or intake-heater assist common on later electronic engines. Check coolant corrosion inhibitor and freeze point each season change, and drain fuel tank water and sediment more often in humid or wet-season conditions given the tank's exposure to condensation. In dusty or landfill environments, service air filters and radiator screens more frequently than the standard 250-hour interval to protect the turbocharger's intake path.
D9N common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 165-1689 | Filter Element As-Air | Air intake service | Check fitment → |
| 1R-0716 | Filter As-Engine Oil | Lubrication service | Check fitment → |
| 8T-6765 | Plug-Pipe | Scheduled service item | Check fitment → |
| 9S-8752 | Nut-Full | Scheduled service item | Check fitment → |
| 119-3025 | Filter | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
D9N fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| Red STOP (warning) lamp | A monitored parameter has reached the shutdown-severity range; a hardwired panel lamp, not a stored diagnostic code. | Loss of engine oil pressure, severe coolant overheat, or critically hot transmission/torque converter oil. | Idle down and stop the machine immediately, identify which gauge triggered the lamp, then shut down before continuing. |
| Amber WARNING (action) lamp | A monitored parameter is outside normal range but below shutdown severity. | A gauge trending into the caution zone - coolant, torque converter oil, hydraulic oil temperature, or low fuel. | Check the quad gauge cluster to find the affected parameter, reduce load or rpm, and correct the cause before it reaches the red zone. |
| Coolant Temperature gauge - red zone | Engine coolant temperature above normal operating range. | Low coolant level, plugged radiator core or screen, slipping/failed fan drive, or a thermostat stuck closed. | Idle the engine to cool down, check coolant level, clear debris from the radiator and screen, and inspect the fan drive. |
| Torque Converter Oil Temperature gauge - red zone | Torque converter outlet oil temperature above normal. | Low transmission/converter oil level, a plugged oil cooler, or sustained high-load/stall operation. | Reduce load and let the converter oil cool at low idle, then check oil level and inspect the cooler for restriction. |
| Engine Oil Pressure gauge - low/red zone | Engine lubrication pressure below the safe minimum. | Low oil level, worn oil pump, plugged suction screen, or a faulty pressure sender. | Shut down the engine at once, check oil level and look for leaks, and verify the sender before restarting. |
| Charging system (voltmeter) gauge - discharge | Battery is not being charged; alternator output below system voltage. | Worn or broken alternator belt, failed alternator or regulator, or loose/corroded battery connections. | Check belt condition and tension, inspect wiring and connections, and test alternator output. |
| Air filter service (restriction) indicator | Intake air filter restriction has reached the service limit; a mechanical vacuum-actuated indicator separate from the electrical monitoring circuit. | Dirty or clogged primary or secondary air filter element. | Service or replace the air filter element and reset the restriction indicator. |
| Fuel level gauge - low | Fuel tank level approaching empty. | Normal consumption without refueling, or a faulty fuel level sender if the reading disagrees with actual tank level. | Refuel the machine; if the gauge reading is inconsistent with tank level, check the sender and its wiring. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
D9N attachments & work tools
Blades
D9N front blade line-up covers S (straight), SU (semi-universal), and U (universal) types, all lift-and-tilt only with no side-to-side angling on this size class; a 6-way/VPAT blade is not documented for the D9N. Standard S-type blade runs about 4.33 m (14.2 ft) wide and 1.81 m (71.3 in) tall with roughly 11.9-15.6 m3 (15.6-20.4 yd3) capacity depending on source; SU capacity is about 13.5 m3 (17.7 yd3) and U capacity about 16.4 m3 (21.4 yd3), with SU/U blades taller and more curved to carry more material. Blade choice trades finish grading and pushing hard/compacted material (S) against bulk long-distance material moving (U), with SU as the quarry/rock-pile compromise.
Rippers
Rear ripper is offered as a single-shank or multi-shank parallelogram unit, both sharing the same lift/tilt hydraulic linkage and mounting frame that also fits the D9R and D9T of this size class. Single-shank is the deep-penetration setup for hard rock, frozen ground, and heavy ditching; multi-shank trades penetration depth for wider coverage and is favored on softer or looser material and general ripping versatility. Individual shank/tip hardware for this class runs on the order of 300 kg (roughly 680 lb) each; full assembly weight is not consistently published and varies with shank count and protector configuration.
Winches
A rear-mounted hydraulic drawworks winch is the class-appropriate option for the D9N, sized for this D9-class tractor and shared with its D9R/D9T successors; it comes with an integrated multi-roller fairlead and a counterweight mount group built into the winch housing. The winch mounts in place of the ripper at the rear and is used for cable work such as log skidding, anchor pulls, and pipe or load winching rather than for ripping duty. Being hydraulically driven off the tractor's implement system, it draws from the same pump/valve circuit as the rear ripper rather than needing a separate mechanical PTO.
Drawbars/counterweights
A bolt-on rear counterweight is used on the D9N when a ripper or winch is not fitted, or to rebalance the machine when a heavier rear tool is mounted; counterweight mass for this size class is commonly cited around 3.7 t (about 8,150 lb) but varies by specific casting and configuration. A rear drawbar/pull-hook can be fitted at the rear frame beneath the ripper or winch mounting position for straight towing duty. Drawbar pull figures reported for this class vary widely by source and track/undercarriage configuration, so treat any single published number as configuration-dependent rather than a fixed rating.
Cab/ROPS guarding
The D9N is fitted with a factory ROPS/FOPS-rated canopy or enclosed cab as the base operator protection structure. For forestry and land-clearing duty, bolt-on brush/grille guards, heavy mesh screening over the cab glass, and limb risers (sweeps) running from the front of the machine up over the cab roof are commonly added to deflect branches and flying debris while preserving operator sight lines. For waste/landfill-type duty, added belly guarding and window screening are typical; these guarding packages are aftermarket additions rather than a single documented Cat factory option specific to the D9N, so confirm current availability with a dealer or attachment specialist.
Hydraulic arrangement
Implement hydraulics on the D9N run from a shared pump rated around 310 L/min (81.9 gpm) at about 18,600 kPa (2,700 psi) relief pressure, feeding both front and rear circuits through separate valve sections. The front blade circuit runs lift and tilt cylinders only (no angle cylinders, since this size class blade does not power-angle side to side). The rear circuit runs lift and tilt cylinders for the ripper, and the same rear hydraulic take-off and mounting frame is used when a winch is fitted instead of the ripper.
All D9N assemblies by section
Every catalogued assembly group for the Caterpillar D9N. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Air Inlet And Exhaust System
163-5804 Aftercooler Gp-Water
| 09***81 | Spacer; (10.5x20x10.0mm Thk) | 1 |
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 2 |
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 4 |
163-5812 Air Cleaner Gp
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 1 |
| 16***12 | Air Cleaner Group | 1 |
| 16***84 | Air Cleaner Group | 1 |
165-1684 Air Cleaner Gp
| 16***84 | Air Cleaner Group | 1 |
| 16***87 | Cup As-Air Cleaner | 1 |
| 16***89 | Filter Element As-Air; (Primary) | 1 |
281-0721 Conversion Gp-Air Inlet & Exh
| 16***12 | Air Cleaner Group | 1 |
| 16***15 | Dust Ejector Group | 1 |
| 16***17 | Lines Group-Air | 1 |
163-5815 Dust Ejector Gp
| 16***15 | Dust Ejector Group | 1 |
| 17***30 | Elbow | 1 |
| 2K***73 | Locknut Inside Guard Assembly | 1 |
163-5803 Lines Gp-Air
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 6 |
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 2 |
| 0S***09 | Bolt (3/4") Filler Tube Assembly To Transfer Drive Case | 3 |
163-5817 Lines Gp-Air
| 16***26 | Sensor Group-Pressure; -Atmospheric Air, Turbo Inlet | 1 |
| 16***17 | Lines Group-Air | 1 |
| 16***19 | Support As | 1 |
179-7023 Manifold Gp-Exhaust
| 10***01 | Seal As-Exhaust | 4 |
| 10***12 | Spacer; (11.13x19.05x53-mm Thk) | 16 |
| 11***50 | Manifold-Exhaust; (Rear, Lh) | 1 |
163-8416 Muffler Gp
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 4 |
| 16***16 | Muffler Group | 1 |
| 7D***49 | Washer (Flywheel Counter Balance Weight) | 4 |
126-5396 Shield Gp-Manifold
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 1 |
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 2 |
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 4 |
174-1472 Turbocharger Gp
| 0S***14 | Bolt (.25" Diameter-.50" Long) | 4 |
| 13***75 | Clamp As; (Service Repair) | 1 |
| 16***27 | Housing | 1 |
163-5802 Turbocharger Gp
| 16***02 | Turbocharger Group | 1 |
| 17***72 | Turbocharger Group | 1 |
| 1S***95 | Gasket-Turbocharger To Manifold; Gasket Turbocharger To Manifold | 1 |
Basic Engine
186-2397 Camshaft Gp
| 0S***09 | Bolt (3/4") Filler Tube Assembly To Transfer Drive Case | 2 |
| 10***74 | Gear-Camshaft Drive; (86-Teeth) | 1 |
| 18***96 | Camshaft As | 1 |
227-7512 Clutch Gp-Fan
| 11***66 | Sensor Group-Speed; -Fan Drive | 1 |
| 18***48 | Seal Kit; (Fan Clutch) | 1 |
| 22***12 | Clutch Group-Fan | 1 |
163-5799 Cover Gp-Cylinder Block
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 2 |
| 0S***90 | Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As) | 2 |
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 4 |
130-7301 Cover Gp-Cylinder Block
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 9 |
| 13***01 | Cover Group-Cylinder Block | 1 |
| 4N***64 | Gasket (Bonnet To Block) | 1 |
4n-6876 Cover Gp-Flywheel Housing
| 0S***66 | Bolt-Pulley To Crankshaft Adapter | 3 |
| 4N***14 | Cover | 1 |
| 4N***76 | Cover Group-Flywheel Housing; Flywheel Housing Cover Group | 1 |
130-7302 Cover Gp-Valve Mechanism
| 10***88 | Base-Valve Mechanism Cover | 4 |
| 11***84 | Cover-Valve Mechanism | 1 |
| 11***15 | Cover As-Valve | 3 |
1w-5009 Crankshaft As
| 1W***09 | Crankshaft As | 1 |
| 4N***84 | Dowel; (.75 Long) | 1 |
| 7N***91 | Gear-Crankshaft; (80-Teeth) | 1 |
1w-5010 Crankshaft Gp
| 1W***09 | Crankshaft As | 1 |
| 1W***10 | Crankshaft Group; Crankshaft Group | 1 |
| 24***18 | Kit-Crankshaft Bearing | 0 |
110-3779 Cylinder Block As
| 11***20 | Seal-O-Ring; (Mid-Liner) | 8 |
| 11***79 | Cylinder Block As | 1 |
| 14***17 | Seal-O-Ring; (140.20mm Id) | 8 |
109-9009 Cylinder Block Gp
| 10***17 | Stud-Taperlock | 18 |
| 10***09 | Cylinder Block Group | 1 |
| 11***79 | Cylinder Block As | 1 |
143-3614 Cylinder Head As
| 10***94 | Dowel | 2 |
| 14***40 | Cylinder Head As | 1 |
| 14***14 | Cylinder Head As | 1 |
143-0040 Cylinder Head As
| 14***40 | Cylinder Head As | 1 |
| 1W***83 | Insert-Valve Seat; (Exhaust)(Standard) | 8 |
| 3B***23 | Core Plug--Flywheel Housing Pinion Shaft Hole | 8 |
164-2208 Cylinder Head Gp
| 03***27 | Seal-O-Ring; (19.18mm Id) | 2 |
| 06***61 | Seal-O-Ring (Id=40.87mm) | 8 |
| 10***92 | Stud-Taperlock; (3/8-16x3.93in) | 16 |
107-7320 Cylinder Head Gp
| 10***20 | Cylinder Head Group | 1 |
| 12***21 | Valve-Exhaust | 8 |
| 12***22 | Valve-Inlet | 8 |
169-1822 Damper & Pulley Gp
| 11***22 | Bolt; (5/8-18x7-In) | 6 |
| 16***21 | Pulley-Crankshaft; (2-Groove, 4-Groove) | 1 |
| 16***22 | Damper & Pulley Group | 1 |
4w-5973 Damper Gp
| 2S***93 | Washer- 5mm (.196 In.) Thick | 6 |
| 33***08 | Damper As | 1 |
| 4N***09 | Adapter (Damper) | 1 |
165-9055 Drive Gp-Fan
| 11***22 | Bolt; (5/8-18x7-In) | 6 |
| 13***16 | Bracket As-Fan | 1 |
| 13***16 | Pulley; (5-Groove) | 1 |
107-3752 Flywheel Gp
| 10***52 | Flywheel Group | 1 |
| 4D***04 | Washer,Flat Cover Mtg,Accessory Drive | 12 |
| 4N***14 | Gear; (113-Teeth)(Flywheel Starter) | 1 |
2w-8025 Flywheel Gp
| 10***92 | Flywheel As | 1 |
| 2W***25 | Flywheel Group | 1 |
| 4D***04 | Washer,Flat Cover Mtg,Accessory Drive | 12 |
168-4592 Gear Gp-Front
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 1 |
| 0T***73 | Bolt (3/8) (63.5mm Long) (On Cab Of Cover Assem.) | 1 |
| 10***80 | Bearing-Sleeve | 1 |
112-3440 Gear Gp-Rear
| 03***94 | Connector-Flared | 1 |
| 03***67 | Connector-Flared -- Adapter To Hose As. | 1 |
| 0S***95 | Bolt 1.25 In. (31.75 mm) Long Guard Assemblies To Radiator Guard | 2 |
153-3050 Housing Gp-Flywheel
| 0L***52 | Capscrew (3/8 - 16 Nc X 3 1/4 Gd8, Hex) | 1 |
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 3 |
| 0S***90 | Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As) | 3 |
127-3514 Housing Gp-Front
| 0L***52 | Capscrew (3/8 - 16 Nc X 3 1/4 Gd8, Hex) | 2 |
| 0T***73 | Bolt (3/8) (63.5mm Long) (On Cab Of Cover Assem.) | 3 |
| 12***14 | Housing Group-Front | 1 |
124-4461 Lifting Gp-Engine
| 11***75 | Bracket-Lifting; (Right) | 1 |
| 11***15 | Bracket-Lifting; (Left) | 1 |
| 12***61 | Lifting Group-Engine | 1 |
7w-6381 Pan Gp-Oil -Engine
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 2 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 2 |
| 18***38 | Pan-Oil | 1 |
192-8809 Piston & Rod Gp
| 13***61 | Ring-Piston; (Top)(Top) | 1 |
| 15***56 | Bolt-Special; (Oil Jet) | 1 |
| 16***78 | Rod As-Connecting | 1 |
134-2596 Plug Gp-Cylinder Block
| 13***96 | Plug Group-Cylinder Block | 1 |
| 5P***04 | Adapter-O-Ring | 1 |
| 6V***52 | Cap-Dust; (Fuel Supply Tee Connection) | 1 |
124-4456 Plug Gp-Cylinder Head
| 12***56 | Plug Group-Cylinder Head | 1 |
| 4N***32 | Plug-Cup | 2 |
| 5P***63 | Plug-Cup | 3 |
107-1954 Rocker Arm Gp
| 10***54 | Rocker Arm Group | 1 |
| 10***03 | Screw; (3/8-24x1.67-In)(Intake) | 2 |
| 12***63 | Bracket-Shaft | 1 |
319-7401 Seal Gp-Crankshaft -Front
| 14***67 | Seal Group-Crankshaft; (Front) | 1 |
| 31***01 | Seal Group-Crankshaft; -Front | 1 |
319-0785 Seal Gp-Crankshaft -Rear
| 14***68 | Seal-Crankshaft; (Rear)(Flywheel Housing) | 1 |
| 31***85 | Seal Group-Crankshaft; -Rear | 1 |
190-4184 Support Gp-Engine
| 19***84 | Support Group-Engine | 1 |
| 24***33 | Support As-Engine | 1 |
| 7X***45 | Bolt 5/8" X 1 3/4" Long (First Type) | 4 |
179-7086 Trunnion Gp-Engine
| 0S***73 | Bolt (102mm Long); (1/2-13x4-In) | 8 |
| 17***86 | Trunnion Group-Engine | 1 |
| 1W***14 | Adapter As | 1 |
108-1551 Valve Mechanism Gp
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 8 |
| 10***89 | Bridge-Valve | 16 |
| 10***88 | Valve Lifter Assem | 16 |
Cooling System
281-0719 Conversion Gp-Cooling System
| 16***11 | Fan Group-Blower | 1 |
| 16***13 | Radiator Group | 1 |
| 16***14 | Tank Group-Coolant | 1 |
163-5811 Fan Gp-Blower
| 16***11 | Fan Group-Blower | 1 |
| 16***08 | Mount As | 12 |
| 17***77 | Guard As-Fan; (Lower, Rh) | 1 |
163-5801 Lines Gp-Water
| 0S***09 | Bolt (3/4") Filler Tube Assembly To Transfer Drive Case | 4 |
| 13***74 | Clip-Loop | 4 |
| 16***01 | Lines Group-Water | 1 |
130-7310 Lines Gp-Water
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 8 |
| 13***10 | Lines Group-Water | 1 |
| 13***87 | Hose As | 1 |
297-3249 Lines Gp-Water
| 10***27 | Elbow | 1 |
| 11***61 | Cooler Group-Transmission Oil | 1 |
| 11***44 | Support As | 1 |
165-5137 Lines Gp-Water
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 1 |
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 3 |
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 9 |
285-7342 Lines Gp-Water
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 1 |
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 3 |
| 0L***52 | Capscrew (3/8 - 16 Nc X 3 1/4 Gd8, Hex) | 2 |
285-7343 Lines Gp-Water
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 6 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 4 |
| 0S***08 | Bolt-Support To Starting Engine Timing Gear Housing | 2 |
137-1339 Pump Gp-Water
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 1 |
| 10***30 | Bearing As-Roller | 1 |
| 11***21 | Plug-Felt; (Water Pump Housing) | 1 |
163-8398 Pump Gp-Water
| 0T***65 | Bolt--3/8" X 3 1/2"--Use As Required; Bolt 5t***56 Plate To Cover Gp 4n***72 | 4 |
| 16***98 | Pump Group-Water | 1 |
| 17***20 | Pulley; (2-Groove) | 1 |
175-4022 Pump Gp-Water
| 11***25 | Filter; (Water)(Pump) | 1 |
| 12***70 | Shaft Assem. | 1 |
| 14***88 | Seal As; (Water Pump) | 1 |
4n-5837 Pump Gp-Water
| 10***49 | Adapter-Inlet | 1 |
| 11***79 | Seal-O-Ring | 1 |
| 11***80 | Seal-O-Ring | 1 |
175-4023 Pump Gp-Water
| 17***18 | Cover | 1 |
| 17***22 | Pump Group-Water | 1 |
| 17***23 | Pump Group-Water | 1 |
163-5813 Radiator Gp
| 03***49 | Elbow; (90 Degree, 37 Degree Flared) | 1 |
| 03***37 | Bolt-Self Locking; 3.81cm(1.5 In.)Long | 6 |
| 03***20 | Bolt; (1/2-13x1.45-In) | 4 |
163-5814 Tank Gp-Coolant
| 03***63 | Adapter - 45degrees - 8 Valve Ports P, T, C1, C2; (45°) (-8, Valve Ports, P, T, C1, C2) | 2 |
| 16***14 | Tank Group-Coolant | 1 |
| 16***56 | Tank Group-Coolant | 1 |
169-0156 Tank Gp-Coolant
| 03***19 | Cap As-Radiator | 1 |
| 15***15 | Neck-Filler | 1 |
| 16***52 | Tank As-Coolant | 1 |
Electrical And Starting System
163-5820 Alternator Gp-Charging
| 16***20 | Alternator Group-Charging | 1 |
| 17***08 | Cable As | 1 |
| 18***34 | Pan As-Drip | 1 |
200-8281 Alternator Gp-Charging
| 10***31 | Fan-Alternator; (11-Blade) | 1 |
| 18***34 | Nut-Flange; (5/8-18-Thd) | 1 |
| 1H***44 | Lockwasher (Bracket To Cab) | 2 |
165-5068 Connection Gp-Electrical
| 10***25 | Stud; (3/8-16x1.25-In) | 1 |
| 16***68 | Connection Group-Electrical | 1 |
| 5P***75 | Washer-Hard; (10.2x22.5x3-mm Thk)(Shield To A/C) | 1 |
196-3736 Control & Mtg Gp-Engine Elek
| 11***69 | Spacer-Special; (8.2x25x89.7-mm Thk) | 4 |
| 15***71 | Control Group-Engine Electronic | 1 |
| 19***36 | Control & Mtg Group-Engine Elek | 1 |
156-7171 Control Gp-Engine Electronic
| 15***71 | Control Group-Engine Electronic | 1 |
| 15***72 | Control Group-Engine Electronic | 1 |
156-7172 Control Gp-Engine Electronic
| 12***74 | Screw-Pan Head; (8-32x9.52-mm) | 1 |
| 13***26 | Washer; (4.52x8.28x0.76-mm Thk) | 1 |
| 15***72 | Control Group-Engine Electronic | 1 |
281-0354 Conversion Gp-Electrical
| 16***20 | Alternator Group-Charging | 1 |
| 17***38 | Control Group-Decelerator | 1 |
| 28***54 | Conversion Group-Electrical | 1 |
266-1467 Sensor Gp-Position -Rotary
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 1 |
| 12***67 | Pin-Connector; (14-Ga To 16-Ga)(14-Ga Wire) | 3 |
| 26***67 | Sensor Group-Position; -Brake Pedal | 1 |
160-2443 Sensor Gp-Position -Rotary
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 1 |
| 16***43 | Sensor Group-Position; -Brake Pedal | 1 |
| 18***35 | Pin-Connector; (16-Ga To 18-Ga) | 3 |
167-1709 Sensor Gp-Pressure
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 1 |
| 16***09 | Sensor Group-Pressure; -Injection Actuation Oil | 1 |
| 9X***13 | Sleeve (Order By cm)(Use As Required) | 0 |
194-6724 Sensor Gp-Pressure
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 1 |
| 19***26 | Harness As-Sensor; (16-18 Ga Wire)(Engine Oil Temperature) | 3 |
| 19***24 | Sensor Group-Pressure; -Air Inlet Manifold | 1 |
194-6722 Sensor Gp-Pressure
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 1 |
| 18***40 | Socket-Connector; (14-Ga To 18-Ga)(14-Ga To 18-Ga) | 3 |
| 19***22 | Sensor Group-Pressure; -Atmospheric Air | 1 |
161-9926 Sensor Gp-Pressure -Atmospheric
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 1 |
| 16***26 | Sensor Group-Pressure; -Atmospheric Air, Turbo Inlet | 1 |
| 18***40 | Socket-Connector; (14-Ga To 18-Ga)(14-Ga To 18-Ga) | 3 |
194-6725 Sensor Gp-Pressure
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 1 |
| 18***40 | Socket-Connector; (14-Ga To 18-Ga)(14-Ga To 18-Ga) | 3 |
| 19***25 | Sensor Group-Pressure; -Engine Oil | 1 |
265-9033 Sensor Gp-Speed
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 2 |
| 19***26 | Harness As-Sensor; (16-18 Ga Wire)(Engine Oil Temperature) | 3 |
| 19***27 | Harness As-Sensor; (14-Ga Wire)(Engine Oil Temperature) | 3 |
129-6628 Sensor Gp-Speed
| 10***13 | Seal; (3 Pin Plug) | 1 |
| 12***28 | Sensor Group-Speed; -Engine Speed/Timing | 1 |
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 1 |
128-5109 Sensor Gp-Speed
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 12***09 | Sensor Group-Speed | 1 |
| 1V***41 | Seal | 1 |
119-4166 Sensor Gp-Speed -Fan Drive
| 03***33 | Seal-O-Ring; (12.42mm Id) | 1 |
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 1 |
| 11***66 | Sensor Group-Speed; -Fan Drive | 1 |
106-0735 Sensor Gp-Temperature
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 1 |
| 10***35 | Sensor Group-Temperature; -Engine Oil | 1 |
| 18***35 | Pin-Connector; (16-Ga To 18-Ga) | 3 |
102-2240 Sensor Gp-Temperature -Engine Coolant
| 10***40 | Sensor Group-Temperature; -Output Transfer Gear Oil | 1 |
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 1 |
| 18***35 | Pin-Connector; (16-Ga To 18-Ga) | 3 |
7n-7049 Starting Motor Gp-Electric
| 5R***55 | Wire Assem. | 1 |
| 6V***13 | Starting Motor Group-Electric; -Cold Weather | 1 |
| 7N***94 | Gasket-Starter | 1 |
6v-0513 Starting Motor Gp-Electric
| 03***21 | Shim Lever Housing | 1 |
| 03***23 | Bolt; (1/4-28x1-In) | 13 |
| 04***65 | Screw 19.05 mm(.750 In.) Long | 4 |
100-4417 Switch Gp-Flow
| 10***17 | Switch Group-Flow; -Engine Coolant | 1 |
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 0 |
| 17***08 | Switch Group-Flow; -Engine Coolant | 1 |
163-5809 Wiring Gp-Engine
| 09***81 | Spacer; (10.5x20x10.0mm Thk) | 1 |
| 0S***09 | Bolt (3/4") Filler Tube Assembly To Transfer Drive Case | 1 |
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
109-0401 Wiring Gp-Unit Injector
| 03***34 | Seal-O-Ring | 1 |
| 10***61 | Clip | 1 |
| 10***01 | Wiring Group-Unit Injector | 1 |
Engine Arrangement
263-5499 Conversion Ar-Engine -Repower
| 21***94 | Enclosure Group-Engine | 1 |
| 25***37 | Engine Ar | 1 |
| 26***99 | Conversion Ar-Engine; -Repower | 1 |
256-7537 Engine Ar
| 10***17 | Switch Group-Flow; -Engine Coolant | 1 |
| 10***52 | Flywheel Group | 1 |
| 10***51 | Valve Mechanism Group | 1 |
278-4974 Installation Gp-Engine
| 12***96 | Shield Group-Manifold | 1 |
| 16***55 | Drive Group-Fan | 1 |
| 16***22 | Damper & Pulley Group | 1 |
Frame And Body
130-9195 Door Gp-Access -Lh
| 13***95 | Door Group-Access; -Lh | 1 |
| 13***45 | Door As | 1 |
| 2K***73 | Locknut Inside Guard Assembly | 2 |
170-1845 Door Gp-Access -Rh
| 17***45 | Door Group-Access; -Rh | 1 |
| 17***47 | Door As; (Rh) | 1 |
| 2K***73 | Locknut Inside Guard Assembly | 2 |
248-4740 Enclosure Gp-Engine -Lh
| 12***01 | Plate As; (Lh) | 1 |
| 12***05 | Plate As; (Lh) | 1 |
| 13***41 | Plate As; (Lh) | 1 |
215-5594 Enclosure Gp-Engine
| 03***35 | Bolt 38.10 mm(1.50 In.)Long | 8 |
| 03***12 | Rivet (To Fuel Tank) | 9 |
| 05***45 | Bracket | 2 |
248-4739 Enclosure Gp-Engine -Rh
| 11***91 | Baffle As; (Rh) | 1 |
| 11***92 | Baffle As | 1 |
| 12***98 | Plate As; (Rh) | 1 |
163-9106 Guard Gp-Radiator
| 10***93 | Pin | 2 |
| 16***06 | Guard Group-Radiator | 1 |
| 16***81 | Baffle As; (Top, Rh) | 1 |
Fuel System
172-7938 Control Gp-Decelerator
| 10***15 | Gasket | 1 |
| 16***43 | Sensor Group-Position; -Brake Pedal | 1 |
| 17***38 | Control Group-Decelerator | 1 |
180-6649 Drive Gp-Unit Inj Hyd Pump
| 03***01 | Bolt; --To Reverse Shaft Bearing Retainer | 2 |
| 0S***18 | Bolt; (5/16-18x1-In)(Hydraulic Pump) | 2 |
| 12***40 | Plate | 1 |
125-3428 Drive Gp-Unit Inj Hyd Pump
| 11***35 | Pin | 1 |
| 12***28 | Drive Group-Unit Inj Hydraulic Pump | 1 |
| 18***49 | Drive Group-Unit Inj Hydraulic Pump | 1 |
232-1173 Injector Gp-Fuel
| 11***98 | Adapter-Injection | 1 |
| 11***22 | Seal-Rectangular | 1 |
| 13***69 | Bolt-Socket Head | 2 |
138-6256 Kit-Seal -Unit Injector Hydraulic Pump
| 03***53 | Seal-O-Ring; (08.92mm Id) | 3 |
| 03***27 | Seal-O-Ring; (19.18mm Id) | 2 |
| 03***39 | Seal-O-Ring (Id=9.25mm) | 1 |
163-5806 Lines Gp-Fuel Filter
| 03***33 | Seal-O-Ring; (12.42mm Id) | 5 |
| 09***87 | Tee | 1 |
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 2 |
163-8406 Lines Gp-Injector Hyd Pump
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 3 |
| 10***02 | Tube As | 1 |
| 11***21 | Elbow | 1 |
126-7292 Pump & Mtg Gp-Unit Inj Hyd
| 03***33 | Seal-O-Ring; (12.42mm Id) | 1 |
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 1 |
| 0S***17 | Bolt --Use Open Hole In Compressor Body | 4 |
209-2785 Pump Gp-Fuel Injection
| 10***26 | Clamp-Injector | 1 |
| 11***21 | Seal-Rectangular | 2 |
| 11***08 | Elbow-Injector | 1 |
235-2026 Pump Gp-Unit Injector Hyd
| 03***39 | Seal-O-Ring (Id=9.25mm) | 2 |
| 03***42 | Seal-O-Ring; (11.89mm Id) | 3 |
| 13***05 | Gasket-Housing | 1 |
235-2024 Pump Gp-Unit Injector Hyd
| 0S***17 | Bolt --Use Open Hole In Compressor Body | 4 |
| 11***20 | Coupling | 1 |
| 14***50 | Pump Group-Fuel Transfer | 1 |
102-7535 Valve Gp-Check
| 03***33 | Seal-O-Ring; (12.42mm Id) | 1 |
| 10***35 | Valve Group-Check; -Fuel Return Port | 1 |
| 6V***89 | Seal-O-Ring (Id=19.18mm) | 1 |
282-1915 Valve Gp-Check
| 03***33 | Seal-O-Ring; (12.42mm Id) | 1 |
| 28***15 | Valve Group-Check; -Fuel | 1 |
| 6V***89 | Seal-O-Ring (Id=19.18mm) | 1 |
161-2309 Valve Gp-Fuel
| 03***43 | Seal-O-Ring | 1 |
| 10***06 | Seal-O-Ring (10.52mm Id) | 1 |
| 10***85 | Seal-O-Ring (6.07mm Id) | 2 |
190-0016 Valve Gp-Fuel
| 03***53 | Seal-O-Ring; (08.92mm Id) | 3 |
| 10***77 | Valve Group-Solenoid; -Pressure Control | 1 |
| 19***16 | Valve Group-Fuel | 1 |
165-1536 Valve Gp-Pressure Control
| 03***27 | Seal-O-Ring; (19.18mm Id) | 2 |
| 03***28 | Seal-O-Ring | 1 |
| 10***03 | Seal-O-Ring; (7.65mm Id) | 1 |
107-0677 Valve Gp-Solenoid
| 03***28 | Seal-O-Ring | 1 |
| 03***39 | Seal-O-Ring (Id=9.25mm) | 1 |
| 10***77 | Valve Group-Solenoid; -Pressure Control | 1 |
Hydraulic System
281-0726 Conversion Gp-Hydraulic System
| 16***68 | Cylinder & Lines Group-Lift; -Rh | 1 |
| 16***69 | Cylinder & Lines Group-Lift; -Lh | 1 |
| 28***26 | Conversion Group-Hydraulic System | 1 |
163-1269 Cylinder & Lines Gp-Lift -Lh
| 16***69 | Cylinder & Lines Group-Lift; -Lh | 1 |
| 16***18 | Hose As | 1 |
| 16***19 | Hose As | 1 |
163-1268 Cylinder & Lines Gp-Lift -Rh
| 15***51 | Connector Assem. | 1 |
| 16***68 | Cylinder & Lines Group-Lift; -Rh | 1 |
| 16***18 | Hose As | 1 |
165-8633 Cylinder Gp-Bulldozer Lift
| 10***17 | Washer; (36.7x77x6-mm Thk) | 1 |
| 13***84 | Ring-Wear | 1 |
| 13***23 | Piston As | 1 |
Lubrication System
4n-2481 Fastener Gp-Oil Pump Mounting -Engine
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 2 |
| 0S***90 | Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As) | 1 |
| 4N***81 | Fastener Group-Oil Pump Mounting; Oil Pump Mounting Fastener Group | 1 |
127-9374 Filler Gp-Engine Oil
| 12***74 | Filler Group-Engine Oil | 1 |
| 12***97 | Tube As | 1 |
| 12***98 | Tube As-Oil Filler | 1 |
163-5800 Filter Gp-Engine Oil
| 06***40 | Seal-O-Ring (Id=37.69mm) | 1 |
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 4 |
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 4 |
190-3472 Fumes Disposal Gp
| 12***61 | Tube | 1 |
| 19***72 | Fumes Disposal Group | 1 |
| 19***74 | Tube | 1 |
130-7306 Gauge Gp-Oil Level (Dipstick) -Engine
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 1 |
| 11***68 | Seal-O-Ring; (15.54mm Id) | 1 |
| 13***06 | Gauge Group-Oil Level (Dipstick); -Engine | 1 |
7n-6700 Lines Gp-Engine Oil
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 1 |
| 0L***52 | Capscrew (3/8 - 16 Nc X 3 1/4 Gd8, Hex) | 2 |
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 1 |
168-9243 Lines Gp-Oil Supply
| 03***33 | Seal-O-Ring; (12.42mm Id) | 2 |
| 11***72 | Hose Assem. | 1 |
| 12***95 | Hose As | 2 |
169-6547 Lines Gp-Turbocharger Oil
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 1 |
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 2 |
| 0S***08 | Bolt-Support To Starting Engine Timing Gear Housing | 2 |
202-3575 Pump Gp-Engine Oil
| 14***03 | Shaft As-Idler | 1 |
| 1D***06 | Bolt; (3/8-16x6-In)(Locations Y) | 2 |
| 1M***44 | Bolt; (3/8-16x2-1/4 In) | 2 |
176-5321 Valve Gp-Modulating
| 11***03 | Kit-Seal; (Modulating Valve) | 1 |
| 16***08 | Washer; (13.03x25.4x2.38-mm Thk) | 1 |
| 16***24 | Nut-Self-Locking; (1/2-28-Thd) | 1 |
Power Train
278-4975 Conversion Gp-Power Train
| 27***75 | Conversion Group-Power Train | 1 |
| 29***49 | Lines Group-Water | 1 |
111-3261 Cooler Gp-Transmission Oil
| 10***41 | Core As; (Transmission Cooler) | 1 |
| 10***01 | Gasket | 2 |
| 11***61 | Cooler Group-Transmission Oil | 1 |
192-0729 Manifold Gp-Control
| 17***16 | Manifold As | 1 |
| 17***21 | Valve Group-Modulating; -Pilot Oil-Hydraulic Fan Oil | 1 |
| 19***29 | Manifold Group-Control; -Hydraulic Fan Pump | 1 |
Service Equipment And Supplies
166-5985 Kit-Compensator
| 16***85 | Kit-Compensator | 1 |
D9N serial number reference
The PIN/serial plate on a D9N sits high on the rear of the left-hand main frame rail; Caterpillar also stamps the number directly into the frame at the same spot so it survives a lost or damaged plate. A ripper or drawbar mounted at the rear can partly hide it, so check both sides of the attachment. The serial reads as a 3-character prefix (identifies the model/production block) followed by a sequential unit number, e.g. 1JD00634 or 6XJ01003 - the letters tell you which block the machine belongs to, the digits are just its place in that block's production run.
| Prefix | Identifies | Notes |
|---|---|---|
| 1JD | D9N Track-Type Tractor - earlier production block | Tied directly to the D9N track-type tractor (1JD00001 and up) in factory service and parts literature for this machine. Equipment-history and appraisal records for this prefix run from about 1986 into the early 1990s (dated units seen at 1986, 1988, 1989, 1990 and 1991). Powered by the Cat 3408 direct-injection, turbocharged, aftercooled diesel rated near 370 hp (276 kW) gross. Powershift transmission; steering clutch-and-brake steering seen on a documented unit from this block. Standard-gauge track-type tractor - no separate XL/LGP/XW prefix split is documented for the D9N the way it is for smaller D-series dozers. Plant of origin not documented in sources reviewed. |
| 6XJ | D9N Track-Type Tractor - later production block | Tied directly to the D9N track-type tractor (6XJ00001 and up) in factory parts literature for this machine, and corroborated by dated equipment listings quoting this prefix on D9N units with the same 3408 engine (about 277 kW/377 hp). A dated unit places this block around 1994. Same 3408 engine and driveline as the 1JD block; no configuration difference from 1JD is documented beyond production sequence. Claims of a specific US-only build location or an exact 1993-1995 start/end window are single-source - confirm exact year span and plant with your dealer. |
Frequently asked questions
What engine powers the Caterpillar D9N?
The D9N uses a Caterpillar 3408 DITA, a mechanically governed, turbocharged and aftercooled V8 diesel displacing 18.0 L. It produces roughly 370-377 hp (276-281 kW) gross depending on rating, with no electronic engine controls; fuel delivery runs through mechanical unit injectors and a flyweight governor.
What is the operating weight of the D9N?
Standard D9N configurations run about 42.5-43.6 t (93,800-96,100 lb) depending on blade and attachment fitment. The reinforced WDA waste/landfill version is heavier, at roughly 46.8 t, due to added guarding and structure.
What replaced the Caterpillar D9N?
Caterpillar replaced the D9N with the D9R in 1996. The D9R kept the same size class but moved to the HEUI-injected 3408E engine. Caterpillar later introduced the D9T, powered by a C18 ACERT engine, continuing the same elevated-sprocket dozer line.
What D9N owners discuss
What engine powers the D9N, and what do owners flag as its main quirks?
The D9N runs the Caterpillar 3408 DITA (direct injection, turbocharged, aftercooled) V8 diesel with a fully mechanical fuel system - no ECM, no electronic injection. That is a key distinction from the later D9R, which moved to the HEUI-injected 3408E. Owners describe the mechanical governor and injection pump as straightforward to service but unforgiving of sloppy rework: this V8's offset-pin crank is sensitive to fillet-radius quality on a regrind, and a rushed or out-of-spec crank job is a repeat cause of bearing trouble after a rebuild, even though a properly done crank runs trouble-free for a long service life. A slow oil weep at the rear of the block is common on high-hour engines - it is often a fretted rear structure or seal area rather than the oil pan, so trace it with dye before replacing gaskets. Camshaft wear tied to marginal lubrication or a sticking lifter also shows up in long-term ownership accounts.
Black smoke and no power under load, but the turbo stays cool - what is the right way to chase it?
This exact symptom set comes up repeatedly: heavy black exhaust and a machine that will not pull under load pushing or ripping, yet the turbo stays cool enough to touch on the intake side after a work cycle. That points at the turbo not making boost, or the real fault sitting upstream of it - fuel delivery, timing, or a restricted air path - rather than a bad turbo itself. Before swapping parts, baseline the engine: run a full-throttle torque-converter stall in a mid gear and record high-idle rpm, stall rpm, and boost pressure, then compare to rated figures. Owners who have replaced a turbo without doing that baseline test sometimes do get power back, but the real fix can just as easily have been a cleared restriction or a linkage disturbed during the swap, so confirm the fault before condemning a component.
What causes a D9N to push a lot of coolant out the radiator cap?
When coolant loss is heavy and shows up mostly at the radiator cap rather than as drips from hoses or the water pump, that pattern points to combustion pressure or gas entering the cooling system - a leaking head gasket, a cylinder liner seal, or a cracked head - rather than a simple external leak. A cooling-system pressure test plus a compression or cylinder-leakage check isolates it much faster than chasing clamps and hoses. Because a failed liner seal can let coolant migrate into the crankcase and take out bearings, have your dealer verify the diagnosis before the machine goes back to work.
Is there anything different about D9N undercarriage wear given the elevated-sprocket design?
The D9N uses Caterpillar's elevated-sprocket undercarriage, carried over from the D9L: the drive sprocket sits above track level, lifting the final drive and belly pan out of the working environment, and the design lets a shop pull the sprocket group and slide the powershift transmission out the back without splitting the whole chassis. That does not change the basic wear economics of a dozer this size - undercarriage parts remain the biggest lifetime cost driver, and tight track tension plus abrasive or wet ground are still the fastest way to burn through pins, bushings, and rails early. Wear rates vary too much by soil type and duty cycle to quote a single hours figure, so track wear trends on the individual machine rather than a rule of thumb. A common pre-purchase red flag is play at a major track/bogie pivot pin or bore, plus odd belt wear from a worn tensioner bearing, both easy to miss without getting underneath the machine.
How durable is the powershift transmission and steering system, and what is actually worth worrying about?
The D9N uses a planetary powershift transmission with oil-cooled clutches covering multiple forward and reverse ranges, paired with steering clutches and brakes built into the final drives and adjusted from access covers at each final drive housing. Owners generally treat the drivetrain as durable as long as torque-converter oil level and condition are maintained. When surging, lagging, or slow and inconsistent directional shifts do show up, the cause usually traces back to low or aerated converter oil, a restricted filter, or a worn control valve rather than worn-out clutch packs, so check fluid condition and pressure first. Because steering clutches and brakes are safety-critical to controlling and stopping the machine, have your dealer verify clutch and brake adjustment rather than judging it by feel.
What kind of "electrical" problems actually show up on a D9N?
The D9N predates electronic engine management - its 3408 has no ECM, no sensors feeding a controller, and no diagnostic codes, so there is no fault-code troubleshooting on this machine. What gets called an electrical issue on a D9N is basic circuit wear appropriate to a machine now several decades old: charging and starter-circuit faults from corroded connectors and brittle harness insulation, gauge and sending-unit readings that drift from the same age-related wiring problems, and worn components in the ether cold-start metering system causing hard cold starts. A properly regulated factory ether system is not a concern by itself, but a leaking or unmetered one is a known way to damage a cold engine on start-up. Treat these as wiring and connector inspection items first, not sensor replacement.
What should I check before buying a used D9N?
Start with the undercarriage: get a measured wear check, not just a walk-around, on rails, bushings, sprockets, and idlers, and specifically check for play at the major track/bogie pivots, which is an easy miss on a casual look. Run a full-throttle torque-converter stall to baseline engine rpm and boost against rated figures, and watch exhaust color and steadiness under load - heavy black smoke under load points to injection or airflow trouble, not just an old engine. Check the cooling system for pressure loss and watch the radiator cap area, since heavy coolant loss there on this engine can mean a head or liner seal problem rather than a hose leak. Cycle the blade and ripper cylinders and check for drift, which signals internal cylinder or valve leakage. Most D9Ns on the used market are now several decades old, so pull maintenance records if the seller has them - owners consistently warn that a poorly maintained example turns into a money pit whose repair bill outstrips any gain in resale value, so weigh undercarriage and engine condition into the price rather than assuming a machine that still runs is good enough.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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