Caterpillartrack-type tractor
Caterpillar D6F SR
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar D6F SR is a special-application track-type tractor built on the D6 platform, factory-configured as a wide-track, low-ground-pressure machine for swamp and forestry work rather than general construction grading. It carries serial prefix 5FR and runs the Caterpillar 3306, a six-cylinder direct-injection diesel with mechanical governing; there is no ADEM controller or diagnostic connector on this generation. The D6F SR belongs to a parallel low-drive SR sub-line that ran alongside the mainstream D6 dozer evolution: the D6D SR gave way to the D6E SR, which was replaced by the D6F SR, which in turn was succeeded by the D6G SR. It is not part of the later high-drive D6H/D6M/D6N/D6R/D6T family, which used a different undercarriage architecture entirely. Cat never issued a standalone public spec sheet with weight, dimension, and performance numbers for this specific swamp/forestry build, so exact operating weight is not documented for the D6F SR configuration; published mainstream D6F figures should be treated as reference only, not a match for this wide-track machine.
Across the SR line, the core change from generation to generation was the engine and its supporting fuel and cooling hardware, while the wide-track swamp undercarriage concept, low-drive layout, and general chassis architecture stayed consistent. The D6F SR shares its lift cylinder seal design, radiator core, turbocharger group, and equalizer bar housing with its D6D SR, D6E SR, D6F, and D6G SR relatives, which is why parts cross-reference listings group these machines together. In the used and parts market today, the D6F SR is a niche find: it was built in far smaller numbers than the standard D6F because it was ordered specifically for logging, wetland, and utility right-of-way work, so parts support leans on shared-casting commonality across the SR family rather than a D6F SR-specific catalog. Buyers who value simplicity over emissions compliance still look to it for its mechanically governed 3306 engine, with no ECM, no aftertreatment, and analog gauge diagnostics, which keeps it serviceable in the field with basic tools.
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 D6F SR specifications
Engine
| Engine Model | Cat 3306, 6-cylinder direct-injection diesel. Confirmed for this chassis via factory parts fitment (radiator core and turbocharger groups referencing this model by name); it is the same base engine used across the D6D SR / D6E SR / D6G SR special-application line. |
| Aspiration | Offered in this dozer platform in both naturally aspirated and turbocharged (3306T) form depending on factory arrangement and build date. The turbocharger group fitted to this machine cross-references the same turbo group used on other 3306-powered dozers of the era, consistent with a turbocharged build; confirm the exact arrangement against the machine's serial number. |
| Bore | 121 mm (4.75 in) — 3306 engine-family constant, unaffected by rating or turbo option. |
| Stroke | 152 mm (6.0 in) — 3306 engine-family constant. |
| Displacement | 10.5 L (638 in³) — 3306 engine-family constant. |
| Cylinders / Cycle | 6-cylinder, in-line, 4-stroke diesel, direct injection. |
| Net / Gross Power | Not documented in available OEM or dealer literature for this specific application configuration. Cat rated the 3306 across this special-application dozer line differently by generation and turbo option; verify the exact flywheel power rating with a Cat dealer using this unit's serial number. |
| Emissions Certification | Mechanical, pre-emissions-era diesel. Predates EPA/EU non-road emissions tiers; no certification level applies. |
Weights
| Operating Weight (Std/XL/LGP) | Not published for this exact application configuration in available specification sources. Operating weight on this size of dozer chassis varies with track shoe width, blade type, hydraulics package, and cab/canopy option — verify with a Cat dealer or the machine's data plate. |
| Shipping Weight | Not documented for this specific configuration. Varies by shoe width and equipment fitted at time of shipment. |
Dimensions
| Blade Width Options | Not documented for this specific configuration. As with the rest of this platform family, blade width tracks the undercarriage gauge selected (standard vs wide/swamp gauge). |
| Track Gauge / Shoe Width | Not published for this exact unit. This is an SR (special/swamp application) chassis, factory-built with a wider track gauge and wider shoes than a standard-gauge D6-class dozer of the same era to lower ground-bearing pressure; the exact gauge and shoe width depend on the shoe option ordered — verify with a Cat dealer. |
| Ground Clearance | Not documented for this specific configuration in available sources. |
| Transport Dimensions (length/width/height) | Not documented for this specific configuration in available sources. Overall transport length and height depend on the blade and ripper fitted. |
Performance
| Travel Speeds (Forward/Reverse) | Not published for this specific configuration in available sources. Verify against the machine's operation and maintenance manual. |
| Drawbar Pull | Not documented for this specific configuration in available sources. |
| Gradeability | Not documented for this specific configuration in available sources. |
| Ground Pressure | Not documented as a published figure for this exact unit. As a special/swamp-application (SR) chassis, it is built for lower ground-bearing pressure than a standard-gauge dozer of the same size class via a wider track gauge and shoe, but the exact kPa/psi rating is shoe-width dependent — verify with a Cat dealer. |
Blades
| Blade Types Offered | Factory parts records for this unit confirm a hydraulic blade-tilt cylinder group and a separate blade-lift cylinder group, consistent with a tilt-capable dozer blade (straight or semi-universal type) being available on this machine. Exact blade capacities by type are not published for this configuration — verify with a Cat dealer. |
| S-Blade Capacity | Not documented for this specific configuration. Varies by undercarriage width and blade width ordered. |
| SU-Blade Capacity | Not documented for this specific configuration. |
| A-Blade Capacity | Not documented for this specific configuration. |
| Ripper | Factory parts records confirm a ripper lift cylinder group was catalogued for this machine, so a rear-mounted parallelogram ripper was an available work tool. Penetration and beam-width figures are not published for this configuration. |
Service Capacities Summary
| Fuel Tank | Not published for this specific configuration in available literature. Verify with a Cat dealer or the machine's operation and maintenance manual. |
| Cooling System | Not published for this specific configuration in available literature. |
| Engine Crankcase (Oil) | Not published for this specific configuration. Use a Cat DEO-class engine oil of the viscosity grade specified in the machine's maintenance manual for the ambient temperature range. |
| Hydraulic Tank | Not published for this specific configuration in available literature. |
| Power Train / Final Drives | Not published for this specific configuration in available literature. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
D6F SR fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | Not separately published for the D6F SR under that name. The tractor runs the Cat 3306 diesel shared across the D6D SR - D6E - D6E SR - D6F SR - D6G SR chassis family (tied together by shared turbocharger, radiator core, and water pump fitment across these models). Crankcase-with-filter capacity for this 3306 platform runs roughly 19-20 L (20-21 qt); confirm against a serial-specific OMM before servicing. | Cat Diesel Engine Oil (DEO). Viscosity by ambient temperature, per standard Cat guidance for this engine generation: SAE 10W below -18 C (0 F), SAE 30 above 0 C (32 F), or a 15W-40 multigrade for a broad ambient range. |
| Cooling system | Not documented for the D6F SR in available literature, and no reliable cross-verified figure exists for this exact chassis. Verify the refill volume against a serial-specific OMM or with a Cat dealer before service. | Caterpillar-specified ethylene-glycol based coolant/antifreeze (Cat ELC or an equivalent heavy-duty coolant meeting Cat's water-glycol specification), mixed per the OMM's climate chart. |
| Fuel tank | About 295-300 L (78-79 gal). This figure is consistent across the D6D and D6G machines built on the same chassis platform as the D6F SR; a D6F SR-specific republished figure was not found, so treat this as the platform-typical capacity and confirm against the serial-specific OMM. | Diesel fuel meeting Cat's fuel specification for the 3306 engine. Use a fuel grade with cold-flow properties suited to ambient temperature in cold climates. |
| Powertrain - direct-drive transmission, bevel gear case, and steering-clutch compartments | This machine uses a direct-drive (clutch-shifted) transmission, confirmed via its own parts catalog. On this generation of Cat D6-class tractor, the transmission, bevel gear case, and left/right steering-clutch compartments are interconnected and share a single oil system drawn by one transmission pump. Combined refill for this platform is approximately 32-38 L (8.5-10 gal); not separately confirmed for the D6F SR by name, so verify against a serial-specific OMM. The OMM does not list separate capacities per compartment on this design - they are serviced and checked as one shared system. | Cat Transmission and Drive Train Oil (TDTO), SAE 30 for this era, or a multigrade TDTO where offered for wider ambient range. |
| Final drive (each side) | Approximate for this size class: roughly 3-4 gal (11-15 L) per side. Only a single, unverified figure was found for this exact machine; treat as indicative only and confirm against a serial-specific OMM. | Cat TDTO (Transmission and Drive Train Oil), same specification used in the powertrain compartments. |
| Hydraulic system/tank | Approximate for this size class, based on a same-platform turbocharged 3306 sibling: about 12 gal (46 L). Not independently corroborated for the D6F SR specifically - verify against a serial-specific OMM. | Cat Hydraulic Oil (Cat HYDO or an equivalent anti-wear hydraulic fluid), viscosity grade selected by ambient temperature per the OMM's chart. |
| Pivot shaft (equalizer bar) | This generation of D6-class tractor uses a grease-lubricated equalizer-bar pivot pin serviced through a grease fitting rather than a separate oil-filled compartment. No discrete refill volume applies. | Cat Multipurpose Grease, graded for ambient temperature, applied at the equalizer bar fitting on the scheduled service interval. |
| Grease points (chassis, track, linkage) | No fill volume - serviced by grease gun at each fitting per the lubrication schedule. | Cat Multipurpose Grease (MPGM): NLGI 1 for cold-weather service or NLGI 2 for normal/warm ambient conditions, per the OMM's climate guidance. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar D6F SR maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 6,000 h |
|
Servicing the D6F SR beyond the schedule
Predictive Maintenance & Fluid Analysis
Run condition-monitoring style sampling on 3306 engine oil, Cat TDTO powertrain oil, and Cat ELC coolant at every scheduled drain. This pre-electronic tractor has no ECM fault history, so fluid analysis is the only early-warning system available. Watch for turbocharger bearing wear metal in engine oil samples; the turbo group is shared across the SR platform. Monitor transmission oil temperature gauge readings for early signs of clutch pack or final drive distress, and track coolant additive depletion in the Cat ELC system between changes.
Corrective & Common Repairs
Lift cylinder seal weeping is the most common hydraulic complaint on this platform; the D6F SR shares its seal design with D6D SR, D6E SR, D6F, and D6G SR siblings. On the 3306, watch for injection pump and injector wear from sustained swamp-duty idling, and keep the fuel tank water separator drained to protect the injection system. Wide-track shoes and low-drive sprockets see accelerated bushing turn and shoe bolt loosening in wet ground; recheck torque after initial running in a new muddy site.
Overhaul & Rebuild Points
Plan a 3306 top-end inspection, covering cylinder liners, rings, and injection timing, once oil consumption or blow-by rises noticeably; this mechanically governed engine gives no electronic warning of internal wear. On the undercarriage, budget for wide-track chain, roller, and idler replacement based on measured wear rather than hours alone, since swamp and forestry duty accelerates pin and bushing wear versus dry-ground dozing. Equalizer bar bushings and pins, and the turbocharger group, are shared rebuild points across the D6D/D6E/D6F/D6G SR family.
Seasonal & Environment Servicing
The D6F SR was built for wet, soft-ground swamp and forestry work, so track tension and undercarriage sealing need closer attention than on a standard D6F working dry sites. Mud and organic debris packed into wide-track shoes accelerates roller and bushing wear. Before wet-season or cold-start operation, check coolant corrosion inhibitor concentration in the Cat ELC system and confirm the air cleaner restriction indicator isn't fouled by fine debris. Drain fuel tank water and sediment more often when working in or near standing water.
D6F SR fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| Engine Oil Pressure warning lamp (red, oil-can icon) | Engine oil pressure has dropped below the safe minimum for current rpm. | Low oil level, worn oil pump, plugged suction screen, or a failed pressure sender/switch. | Stop the engine immediately, check oil level and look for external leaks, then verify the sender before restarting. |
| Coolant Temperature gauge in red zone / high-temp warning lamp | Engine coolant temperature is above normal operating range. | Low coolant, plugged radiator core or fins, failing thermostat, or a slipping/damaged fan drive. | Reduce load and let the engine idle down, check coolant level once safe, then inspect the radiator, fan drive, and thermostat. |
| Alternator / Charging System warning lamp | Charging system voltage is below normal and the battery is not being charged. | Loose or broken alternator belt, corroded wiring, a bad voltage regulator, or a failed alternator. | Check belt tension and battery cable/wiring connections, then test alternator output and regulator. |
| Air Cleaner Service (restriction) indicator | Intake air filter restriction has reached the service limit. | Clogged primary or secondary air filter element from dust ingestion. | Service or replace the air filter element and reset the restriction indicator. |
| Transmission Oil Temperature warning lamp / gauge in red zone | Power-train (transmission) oil temperature is above the normal operating range. | Low transmission oil level, a plugged oil cooler, sustained lugging under heavy load, or a stuck cooler bypass valve. | Reduce load and let the machine idle to cool, then check fluid level and inspect the cooler and bypass valve. |
| Transmission/Hydraulic Filter Bypass indicator | The filter element is restricted enough that oil is bypassing it unfiltered. | Contaminated or overdue filter element, or cold, high-viscosity oil at startup. | Replace the filter element and check oil condition and change interval. |
| Parking Brake engaged indicator lamp | The parking brake circuit shows the brake applied. | Operator has the park brake set, or a brake control valve/switch fault is holding the circuit on. | Confirm lever position; if the lamp stays lit with the brake released, check the brake control valve and switch wiring. |
| Fuel Level low warning (where equipped) | Fuel level has reached the reserve range on the sender. | Low fuel in the tank or an erratic/failed fuel level sender. | Refuel as needed; if the gauge reads erratically with adequate fuel, check the sender and wiring. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
D6F SR attachments & work tools
Blades (S/SU/A, VPAT)
This low-drive D6 platform tractor (part of the D6D/D6E/D6F/D6G swamp-lineage) was offered with S (straight), SU (semi-universal) and A (angling) blade choices typical of this dozer class; the taller, more curved U (universal) blade belongs to larger models, not this size class. SU blade width in this class runs roughly 3.2-3.8 m (10.5-12.5 ft), with the straight blade narrower and higher-capacity per pass and the angle blade able to pivot for side-casting but carrying less material. VPAT (variable pitch) blade geometry is a later high-drive D6 (D6R/D6T-onward) feature and is not offered on this earlier platform.
Rippers (single vs multi-shank)
Rear ripper choices for this dozer class split into single-shank (one deep-penetration tooth on a longer, heavier frame, often with a cab-controlled pin-puller, for maximum fracturing force in hard or frozen ground) and multi-shank parallelogram rippers (a frame that accepts one, two or three shanks depending on ground conditions, better suited to softer or pre-fractured material and general land-clearing/forestry work). A single-shank ripper frame for this class runs heavier than a comparable multi-shank frame; exact assembly weight varies by supplier and by how many shank positions are fitted, so verify against the specific ripper actually mounted.
Winches
A rear-mounted cable winch (PTO or hydraulically driven) is a common factory or dealer-fit option on D6-class swamp and forestry tractors, used for tree-length skidding, log winching, and self-recovery in soft ground. Drum and cable capacity vary with the spool fitted. On this generation the winch and the ripper share the same rear drawbar mounting location, so a machine is normally set up with one or the other at the rear, not both at once.
Drawbars / counterweights
With no ripper or winch fitted, a standard rigid drawbar bolts to the rear frame for towing and pulling. Adding a ripper or winch at the rear typically calls for added rear counterweight (or removal of the standard drawbar) to rebalance the machine, particularly with a straight (S) blade up front, which already carries more weight forward. Drawbar and counterweight fitment is configuration-specific and shares the same rear mounting point as the ripper/winch.
Cab/ROPS guarding (forestry/waste)
Forestry and waste/landfill-duty builds of this size of swamp dozer typically add ROPS/FOPS-rated cab guarding: heavy screen mesh over front, side and rear glass, screened door guards, and belly/underbody guards to protect the crankcase and final drives from stumps and debris. A grille or radiator screen is also common, to keep brush and debris out of the cooling package. These are supplied as bolt-on guarding packages by Caterpillar and third-party attachment houses for this dozer class; no single published spec sheet defines one fixed 'forestry package' for this exact model, so confirm the guarding scope against the specific machine and supplier.
Hydraulic arrangement (front/rear tools)
Front blade functions (lift and tilt, plus angle on the A blade) run off the tractor's implement hydraulic circuit and control valve bank at the front. A rear-mounted ripper (shank raise/lower, plus shank angle on multi-cylinder frames) or an installed winch draws from a separate rear circuit or motor fed by the same implement pump, since front and rear tools are not normally operated together. High-pressure hydraulics (around 27,600 kPa/4,000 psi) built specifically for high-output hydraulic winches is a feature of the later D6/D6 XE generation; this earlier platform runs a conventional, lower-pressure implement circuit, so winch performance on this machine depends mainly on the winch's own pump/motor rather than the tractor's blade-circuit pressure.
All D6F SR assemblies by section
Every catalogued assembly group for the Caterpillar D6F 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 |
1w4486 Fastener Gp-Exhaust Manifold
| 1W***86 | Fastener Group-Exhaust Manifold; Exhaust Manifold Fastener Group | 1 |
1242864 Air Cleaner Gp
| 12***64 | Air Cleaner Group | 1 |
1003295 Air Cleaner Gp
| 10***95 | Air Cleaner Group | 1 |
7n7750 Cartridge Gp-Turbocharger*R
| 7N***50 | Cartridge Group-Turbocharger | 1 |
1242871 Dust Ejector Gp
| 12***71 | Dust Ejector Group | 1 |
1410643 Extension Gp-Exhaust
| 14***43 | Extension Group-Exhaust | 1 |
1259589 Extension Gp-Exhaust
| 12***89 | Extension Group-Exhaust | 1 |
1257982 Inlet Gp-Air
| 12***82 | Inlet Group-Air | 1 |
1259590 Lines Gp-Air
| 12***90 | Lines Group-Air | 1 |
1344208 Manifold Gp-Exhaust
| 13***08 | Manifold Group-Exhaust | 1 |
1259588 Muffler Gp
| 12***88 | Muffler Group | 1 |
8n2669 Turbocharger Gp
| 8N***69 | Turbocharger Group; Turbocharger Group | 1 |
7n7748 Turbocharger Gp*R
| 7N***48 | Turbocharger Group | 1 |
Basic Engine
1n4406 Camshaft Gp
| 1N***06 | Camshaft Group-Single; Camshaft Group--Single | 1 |
8n3163 Cover Gp-Cylinder Block
| 8N***63 | Cover Group-Cylinder Block | 1 |
2p6531 Cover Gp-Cylinder Head
| 2P***31 | Cover Group-Cylinder Head; Cylinder Head Cover Group | 1 |
2p6528 Cover Gp-Front Housing
| 2P***28 | Cover Group-Front Housing; Front Housing Cover Group | 1 |
8n4745 Cover Gp-Valve Mechanism
2y5206 Crankshaft Gp
7n6550 Cylinder Block As
8n5286 Cylinder Block Gp*R
| 8N***86 | Cylinder Block Group; Cylinder Block Group | 1 |
1n3576 Cylinder Block Gp
7n8876 Cylinder Head Gp*R
| 7N***76 | Cylinder Head Group; Cylinder Head Group | 1 |
1w7733 Damper Gp
| 1W***33 | Damper Group; Damper Group | 1 |
1260600 Drive Gp-Accessory
| 12***00 | Drive Group-Accessory | 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 |
8n0872 Fastener Gp-Front Housing
| 8N***72 | Fastener Group-Front Housing; Front Housing Fastener Group | 1 |
2p6200 Fastener Gp-Oil Pan
| 2P***00 | Fastener Group-Oil Pan; Fastener Gp-Engine Oil Pan | 1 |
7s7875 Flywheel Gp
| 7S***75 | Flywheel Group; Flywheel Group | 1 |
1w5634 Gear Gp-Front
| 1W***34 | Gear Group-Front Timing; Front Gear Group--Timing | 1 |
1307086 Housing Gp-Flywheel
| 13***86 | Housing Group-Flywheel | 1 |
8n0303 Housing Gp-Front
| 8N***03 | Housing Group-Front; Front Housing Group | 1 |
1279805 Lifting Gp-Engine
| 12***05 | Lifting Group-Engine | 1 |
1w2766 Mounting Gp-Engine
| 1B***86 | Bolt-Bracket Assembly To Timing Gear | 8 |
| 1D***14 | Bolt--Front Support To Frame | 2 |
| 1W***66 | Mounting Group-Engine | 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 |
7n2887 Pulley Gp-Crankshaft
| 7N***87 | Pulley Group-Crankshaft; Crankshaft Pulley Group | 1 |
1194713 Pulley Gp-Fan
| 11***13 | Pulley Group-Fan | 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 |
8n0107 Trunnion Gp-Engine
| 8N***07 | Trunnion Group-Engine; Engine Trunnion Group | 1 |
7c7013 Valve Mechanism Gp
| 7C***13 | Valve Mechanism Group | 1 |
7n8026 Valve Mechanism Gp
| 7N***26 | Valve Mechanism Group; Valve Mechanism Group | 1 |
Cooling System
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 & Engine Oil
| 2W***60 | Cooler Group-Filter Base & Eng Oil | 1 |
2w6780 Cooler Gp-Transmission Oil
| 2W***80 | Cooler Group-Transmission Oil; Transmission Oil Cooler Group | 1 |
1p7878 Fan Gp-Blower
| 1P***78 | Fan Group-Blower | 1 |
2p8173 Housing & Regulator Gp
| 2P***73 | Housing & Regulator Group; Regulator And Housing Group | 1 |
2w6779 Lines Gp-Water
| 2W***79 | Lines Group-Water | 1 |
8n4112 Lines Gp-Water
| 8N***12 | Lines Group-Water; -Bypass Relief | 1 |
7n5909 Pump Gp-Water
| 7N***09 | Pump Group-Water; Water Pump Group | 1 |
2w8001 Pump Gp-Water*R
| 2W***01 | Pump Group-Water | 1 |
7w1647 Radiator Gp-Part 1 Of 2
| 7W***47 | Radiator Group | 1 |
7w1647 Radiator Gp-Part 2 Of 2
| 7W***47 | Radiator Group | 1 |
1262829 Valve Gp-Control
| 12***29 | Valve Group-Control; -Steering Clutch | 1 |
Electrical And Starting System
9g9813 Alarm Gp
| 9G***13 | Alarm Group; -Action-Action, Engine Overspeed | 1 |
7n9720 Alternator Gp-Charging
| 7N***20 | Alternator Group; Alternator Group (Robert Bosch) | 1 |
6n9294 Alternator Gp-Charging*R
| 3T***52 | Alternator Group-Charging | 1 |
| 6N***94 | Alternator Group; (24-Volt, 35-Ampere) | 1 |
| 7N***20 | Alternator Group; Alternator Group (Robert Bosch) | 1 |
3t6352 Alternator Gp-Charging
| 3T***52 | Alternator Group-Charging | 1 |
6n5468 Alternator Gp-Charging
| 6N***68 | Alternator Group-Charging | 1 |
9g4574 Alternator Gp-Charging
| 9G***74 | Alternator Group-Charging; Alternator Group (Nippondenso) | 1 |
1252608 Battery & Wiring Gp-Part 1 Of 3
| 12***08 | Battery & Wiring Group | 1 |
1252608 Battery & Wiring Gp-Part 2 Of 3
| 12***08 | Battery & Wiring Group | 1 |
1252608 Battery & Wiring Gp-Part 3 Of 3
| 12***08 | Battery & Wiring Group | 1 |
1005052 Control Gp-Electronic
| 10***52 | Control Group-Electronic Filter; (Hour Meter Filter) | 1 |
1076689 Lamp Gp-Flood
| 10***89 | Lamp Group-Flood; -Vertical Mount | 1 |
1295747 Lighting Gp-2 Lamp-24 Volt
| 12***47 | Lighting Group-2 Lamp | 1 |
1258899 Lighting Gp-4 Lamp
| 12***99 | Lighting Group-4 Lamp | 1 |
6v5023 Starting Motor Gp-Electric
| 6V***23 | Starting Motor Group-Electric | 1 |
6v5207 Starting Motor Gp-Electric
| 6V***07 | Starting Motor Group-Electric | 1 |
6v5226 Starting Motor Gp-Electric
| 6V***26 | Starting Motor Group-Electric | 1 |
1w3851 Starting Motor Gp-Electric
| 1W***51 | Starting Motor Group-Electric | 1 |
1068555 Starting Motor Gp-Electric-24 Volt
| 10***55 | Starting Motor Group-Electric | 1 |
| 6V***23 | Starting Motor Group-Electric | 1 |
| 6V***07 | Starting Motor Group-Electric | 1 |
1058827 Suppressor Gp-Electronic
| 10***27 | Suppressor Group-Electronic; -Air Conditioner Compressor | 1 |
7n0718 Switch As-Disconnect
| 7N***18 | Switch As-Disconnect; -Battery-Ground Level | 1 |
7n8001 Switch As-Toggle
| 7N***01 | Switch As-Toggle; -Prelubrication Override-Crank Override | 1 |
7n8000 Switch As-Toggle
| 7N***00 | Switch As-Toggle; (Warning Light) | 1 |
1303085 Switch Gp-Manual
| 13***85 | Switch Group-Manual | 1 |
9g7641 Switch Gp-Start
| 9G***41 | Switch Group-Start; -Engine, Key-Vims Service | 1 |
1258902 Warning Gp-Backup
| 12***02 | Warning Group-Backup | 1 |
1295734 Warning Gp-Backup
| 12***34 | Warning Group-Backup | 1 |
1258898 Wiring Gp-Sensor
| 12***98 | Wiring Group-Sensor | 1 |
Engine Arrangement
1256714 Engine Ar-Part 1 Of 2
| 12***14 | Engine Ar | 1 |
| 12***00 | Drive Group-Accessory | 1 |
| 13***86 | Housing Group-Flywheel | 1 |
1256714 Engine Ar-Part 2 Of 2
| 11***13 | Pulley Group-Fan | 1 |
| 12***14 | Engine Ar | 1 |
| 12***90 | Lines Group-Air | 1 |
Frame And Body
7m0668 Bar & Suspension Gp
| 7M***68 | Bar & Suspension Group | 1 |
1259207 Case & Frame Gp
| 12***07 | Case & Frame Group | 1 |
1p3365 Drawbar Gp-Swinging
| 1P***65 | Drawbar Group-Swinging | 1 |
1253466 Extension Gp-Fender
| 12***66 | Extension Group-Fender | 1 |
1249353 Fender Gp
| 12***53 | Fender Group | 1 |
1023483 Frame Gp-Track Roller
| 10***83 | Frame Group-Track Roller | 1 |
5y2007 Guard As-Radiator
| 5Y***07 | Guard As-Radiator | 1 |
5y2066 Guard Gp-Crankcase
| 5Y***66 | Guard Group-Crankcase | 1 |
5y2006 Guard Gp-Radiator
| 5Y***06 | Guard Group-Radiator | 1 |
7g8390 Guard Gp-Track Guide
| 7G***90 | Guard Group-Track Guide | 1 |
7m0455 Guard Gp-Track Roller
| 7M***55 | Guard Group-Track Roller | 1 |
7g8538 Guard Gp-Track Roller
| 7G***38 | Guard Group-Track Roller | 1 |
1242872 Hood & Dash Gp
| 12***72 | Hood & Dash Group | 1 |
2y9843 Idler Gp-Front-Part 1 Of 2
| 2Y***43 | Idler Group-Front | 1 |
2y9843 Idler Gp-Front-Part 2 Of 2
| 2Y***43 | Idler Group-Front | 1 |
1171018 Link As-Track
| 11***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 |
1181618 Roller Gp-Track-Double Flange
| 11***18 | Roller Group-Track-Double Flange | 1 |
9g8029 Roller Gp-Track-Single Flange
| 9G***29 | Roller Group-Track-Single Flange; Track Roller Group-Single Flange | 1 |
1181617 Roller Gp-Track-Single Flange
| 11***17 | Roller Group-Track-Single Flange | 1 |
1258661 Support Gp-Fender
| 12***61 | Support Group-Fender | 1 |
6y6315 Track Gp
| 11***18 | Link As-Track | 1 |
| 1S***59 | Bolt 2.15 In. (54.61 mm) Long | 140 |
| 1S***60 | Nut-Track; (3/4-16-Thd) | 140 |
6y6316 Track Gp-2 Required
| 11***18 | Link As-Track | 1 |
| 1S***59 | Bolt 2.15 In. (54.61 mm) Long | 140 |
| 1S***60 | Nut-Track; (3/4-16-Thd) | 140 |
6y6317 Track Gp-2 Required
| 11***18 | Link As-Track | 1 |
| 1S***59 | Bolt 2.15 In. (54.61 mm) Long | 140 |
| 1S***60 | Nut-Track; (3/4-16-Thd) | 140 |
6y6899 Track Gp-2 Required
| 11***18 | Link As-Track | 1 |
| 1S***59 | Bolt 2.15 In. (54.61 mm) Long | 140 |
| 1S***60 | Nut-Track; (3/4-16-Thd) | 140 |
Fuel System
7c8993 Fastener Gp-Fuel Injection Pump
| 7C***93 | Fastener Group-Fuel Inj Pump | 1 |
7w5928 Pump Gp-Fuel Injection
| 7W***28 | Pump Group-Fuel Injection | 1 |
6i2832 Pump Gp-Fuel Injection
| 6I***32 | Pump Group-Fuel Injection | 1 |
7c9602 Pump Gp-Governor & Fuel Injection
| 7C***02 | Pump Group-Gov & Fuel Inj; Governor And Fuel Injection Pump Group | 1 |
1w3597 Torque Control Gp
| 1W***97 | Torque Control Group | 1 |
1254098 Control Gp-Decelerator
| 12***98 | Control Group-Decelerator | 1 |
1254097 Control Gp-Governor
| 12***97 | Control Group-Governor | 1 |
2w3282 Filter Gp-Secondary
| 2W***82 | Filter Group-Secondary Fuel | 1 |
2w6559 Governor Gp-Part 3 Of 3
| 2W***59 | Governor Group | 1 |
2w6559 Governor Gp-Part 2 Of 3
| 2W***59 | Governor Group | 1 |
2w6559 Governor Gp-Part 1 Of 3
| 2W***59 | Governor Group | 1 |
2w1605 Lines Gp-Drain
| 2W***05 | Lines Group-Drain; Fuel Drain Lines Group | 1 |
1259560 Lines Gp-Fuel
| 12***60 | Lines Group-Fuel | 1 |
4p9331 Lines Gp-Fuel Injection
| 4P***31 | Lines Group-Fuel Injection | 1 |
4p9330 Lines Gp-Fuel Injection
| 4P***30 | Lines Group-Fuel Injection | 1 |
1w3008 Lines Gp-Fuel Injection
| 1W***08 | Lines Group-Fuel Injection | 1 |
1w3609 Lines Gp-Fuel Injection
| 1W***09 | Lines Group-Fuel Injection | 1 |
8n5251 Pump Gp-Fuel Priming & Primary Filter
| 8N***51 | Pump Group-Fuel Prime & Prim Filter | 1 |
8n1180 Pump Gp-Fuel Priming & Primary Filter
| 8N***80 | Pump Group-Fuel Prime & Prim Filter; Pump Gp-Fuel Priming & Primary Filter | 1 |
8n3365 Pump Gp-Fuel Priming
| 8N***65 | Pump Group-Fuel Priming; Priming Pump-Fuel & Primary Filter | 1 |
1w1695 Pump Gp-Fuel Transfer*R
| 1W***95 | Pump Group-Fuel Transfer | 1 |
2w4160 Pump & Mounting Gp-Fuel Transfer
| 2W***60 | Pump Group-Fuel Transfer & Mtg; Fuel Transfer Pump And Mounting Group | 1 |
7c3122 Solenoid Gp-Control
| 7C***22 | Solenoid Group-Control | 1 |
1259186 Tank Gp-Fuel
| 12***86 | Tank Group-Fuel | 1 |
Hydraulic System
5y2129 Bracket Gp-Cylinder
| 5Y***29 | Bracket Group-Cylinder | 1 |
1327329 Control Gp-Hydraulic
| 13***29 | Control Group-Hydraulic | 1 |
1326877 Control Gp-Hydraulic
| 13***77 | Control Group-Hydraulic | 1 |
1326251 Control Gp-Hydraulic
| 13***51 | Control Group-Hydraulic | 1 |
1337589 Control Gp-Hydraulic Hand
| 13***89 | Control Group-Hydraulic Hand | 1 |
2y8590 Cylinder Ar-Tilt
| 2Y***90 | Cylinder Ar-Tilt | 1 |
2j1402 Cylinder Gp-Hydraulic (Chg N23-N24)
| 2J***02 | Cylinder Group-Hydraulic; Hydraulic Tilt Cylinder Group (Type 6) | 1 |
8j6868 Cylinder Gp-Lift (Chg 01)
| 8J***68 | Cylinder Group-Lift | 1 |
1244772 Cylinder Gp-Lift (Chg 00)
| 12***72 | Cylinder Group-Lift | 1 |
1244773 Cylinder Gp-Lift (Chg 00)
| 12***73 | Cylinder Group-Lift | 1 |
6e5655 Cylinder Gp-Lift (Chg 00)
| 6E***55 | Cylinder Group-Lift | 1 |
1306135 Cylinder Gp-Ripper Lift (Chg -00 - -01)
| 13***35 | Cylinder Group-Ripper Lift | 1 |
9t2797 Cylinder Gp-Tilt (Chg -01-N04)
| 9T***97 | Cylinder Group-Tilt; -Bulldozer | 1 |
1013834 Filter Gp-Hydraulic
| 10***34 | Filter Group-Oil; -Case Drain-Auger Gear Pump | 1 |
1287391 Hydraulic Ar
| 12***39 | Tank Group-Hydraulic | 1 |
| 12***23 | Lines Group-Bulldozer | 1 |
| 12***88 | Lines Group-Tilt | 1 |
1287390 Hydraulic Ar
| 12***39 | Tank Group-Hydraulic | 1 |
| 12***23 | Lines Group-Bulldozer | 1 |
| 12***14 | Lines Group-Pump | 1 |
1287393 Hydraulic Ar
| 12***39 | Tank Group-Hydraulic | 1 |
| 12***90 | Lines Group-Hydraulic | 1 |
| 12***23 | Lines Group-Bulldozer | 1 |
1287392 Hydraulic Ar
| 12***39 | Tank Group-Hydraulic | 1 |
| 12***92 | Lines Group-Rear Attachment | 1 |
| 12***23 | Lines Group-Bulldozer | 1 |
1263923 Lines Gp-Bulldozer
| 12***23 | Lines Group-Bulldozer | 1 |
1406633 Lines Gp-Bulldozer
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 16 |
| 10***75 | Hose As | 2 |
| 14***33 | Lines Group-Bulldozer | 1 |
1406634 Lines Gp-Bulldozer
| 14***34 | Lines Group-Bulldozer | 1 |
1263690 Lines Gp-Hydraulic
| 12***90 | Lines Group-Hydraulic | 1 |
1263692 Lines Gp-Rear Attachment
| 12***92 | Lines Group-Rear Attachment | 1 |
1307089 Lines Gp-Ripper
| 13***89 | Lines Group-Ripper | 1 |
1268088 Lines Gp-Tilt
| 12***88 | Lines Group-Tilt | 1 |
7t9463 Lines Gp-Tilt Cylinder
| 7T***63 | Lines Group-Tilt Cylinder; Tilt Cylinder Lines Group | 1 |
1250339 Tank Gp-Hydraulic
| 12***39 | Tank Group-Hydraulic | 1 |
1412424 Tank Gp-Hydraulic
| 14***24 | Tank Group-Hydraulic | 1 |
1294603 Valve Gp-Bank 1
| 12***03 | Valve Group-Bank 1 | 1 |
1294604 Valve Gp-Bank 2
| 12***04 | Valve Group-Bank 2 | 1 |
1294606 Valve Gp-Bank 3
| 12***06 | Valve Group-Bank 3 | 1 |
1287384 Valve Gp-Hydraulic
| 12***58 | Spacer; (15x25x25-mm Thk), Tee, Tee; Replaces 420717a1 | 3 |
| 12***84 | Valve Group-Hydraulic | 1 |
| 12***03 | Valve Group-Bank 1 | 1 |
1287389 Valve Gp-Hydraulic
| 12***58 | Spacer; (15x25x25-mm Thk), Tee, Tee; Replaces 420717a1 | 3 |
| 12***89 | Valve Group-Hydraulic | 1 |
| 12***06 | Valve Group-Bank 3 | 1 |
1287385 Valve Gp-Hydraulic
| 12***58 | Spacer; (15x25x25-mm Thk), Tee, Tee; Replaces 420717a1 | 3 |
| 12***85 | Valve Group-Hydraulic | 1 |
| 12***04 | Valve Group-Bank 2 | 1 |
Implements
7j2783 Bit & Cutting Edge Gp
| 7J***83 | Bit & Cutting Edge Group; -Straight | 1 |
6i8005 Blade As
| 6I***05 | Blade As | 1 |
1281700 Blade Gp
| 12***00 | Blade Group | 1 |
6i8004 Blade Gp-Straight
| 6I***04 | Blade Group-Straight | 1 |
1330798 Brace Gp-Bulldozer
| 13***98 | Brace Group-Bulldozer | 1 |
1283412 Bulldozer Ar
| 12***00 | Blade Group | 1 |
| 12***12 | Bulldozer Ar | 1 |
| 13***98 | Brace Group-Bulldozer | 1 |
1406638 Bulldozer Ar-Straight
| 14***34 | Lines Group-Bulldozer | 1 |
| 14***38 | Bulldozer Ar-Straight | 1 |
| 3J***59 | Push Arm & Brace Group; Push Arm And Brace Group | 1 |
6i8008 C-Frame Gp
| 6I***08 | C-Frame Group; Frame Gp-C | 1 |
3k9880 Mounting Gp-Ripper
| 3K***80 | Mounting Group-Ripper; Ripper Mounting Group | 1 |
3j4359 Push Arm & Brace Gp
| 3J***59 | Push Arm & Brace Group; Push Arm And Brace Group | 1 |
1303430 Ripper Ar
| 13***30 | Ripper Ar | 1 |
| 13***35 | Cylinder Group-Ripper Lift | 1 |
| 13***89 | Lines Group-Ripper | 1 |
8j7521 Ripper Gp
| 8J***21 | Ripper Group; Ripper Group | 1 |
1438588 Tilt Ar
| 14***88 | Tilt Ar | 1 |
| 7T***63 | Lines Group-Tilt Cylinder; Tilt Cylinder Lines Group | 1 |
| 9T***97 | Cylinder Group-Tilt; -Bulldozer | 2 |
8j2189 Tooth Gp-Ripper
| 8J***89 | Tooth Group-Ripper; -Straight | 1 |
4j2848 Trunnion Gp
| 4J***48 | Trunnion Group; Bulldozer Trunnion Group | 1 |
Lubrication System
8n1501 Lines Gp-Turbocharger Oil
| 8N***01 | Lines Group-Turbocharger Oil; Turbocharger Oil Lines Group | 1 |
8n4457 Base Gp-Oil Filter
| 8N***57 | Base Group-Oil Filter; Base Group-Engine Oil Filter | 1 |
1p4244 Breather Gp
| 1P***44 | Breather Group | 1 |
2p6855 Filler Gp-Oil
| 2P***55 | Filler Group-Oil | 1 |
1n4874 Fumes Disposal Gp
| 1N***74 | Fumes Disposal Group | 1 |
2p6493 Gauge Gp-Oil Level (Dipstick)
| 2P***93 | Gauge Group-Oil Level (Dipstick); -Engine | 1 |
2p6105 Lines Gp-Engine Oil
| 2P***05 | Lines Group-Engine Oil; Engine Oil Lines Group | 1 |
6i1346 Pump Gp-Engine Oil*R
| 6I***46 | Pump Group-Engine Oil | 1 |
6n2642 Pump Gp-Engine Oil
| 6N***42 | Pump Group-Engine Oil | 1 |
2p1784 Pump Gp-Engine Oil
| 2P***84 | Pump Group-Engine Oil; Engine Oil Pump Group | 1 |
Operator Station
6w2520 Cushion As-Arm-Lh
| 6W***20 | Cushion As-Arm | 1 |
6w2519 Cushion As-Arm-Rh
| 6W***19 | Cushion As-Arm | 1 |
1244483 Floorplate Gp
| 12***83 | Floorplate Group | 1 |
1295696 Guard Gp-Vandalism
| 12***96 | Guard Group-Vandalism | 1 |
1415997 Handhold Gp
| 14***97 | Handhold Group | 1 |
1258900 Horn Gp-Electric
| 03***31 | Bolt; (3/8-16x3.75-In)(Shield As. To Heads) | 2 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 2 |
| 12***00 | Horn Group-Electric | 1 |
1250836 Instrument Gp
| 12***36 | Instrument Group | 1 |
9p9392 Mirror Gp-Rear View
| 9P***92 | Mirror Group; -Open Rops-Rops | 1 |
1256357 Mounting Gp-Rops
| 12***57 | Mounting Group-Rops | 1 |
1257818 Mounting Gp-Rops
| 12***18 | Mounting Group-Rops | 1 |
1295579 Rops Ar
| 12***57 | Mounting Group-Rops | 1 |
| 12***18 | Mounting Group-Rops | 1 |
| 12***79 | Rops Ar | 1 |
9g6074 Rops Gp
| 9G***74 | Rops Group; Roll-Over Protective Structure Group | 1 |
1252115 Seat & Support Gp
| 12***15 | Seat & Support Group | 1 |
8y4029 Seat Belt Gp
| 8Y***29 | Seat Belt Group | 1 |
9c7773 Seat Gp
| 9C***73 | Seat Group | 1 |
9c3696 Seat Gp
| 9C***96 | Seat Group-Suspension | 1 |
| 9C***61 | Suspension Group-Seat | 1 |
| 9C***73 | Seat Group | 1 |
9c7161 Suspension Gp-Seat-Part 2 Of 2
| 9C***61 | Suspension Group-Seat | 1 |
9c7161 Suspension Gp-Seat-Part 1 Of 2
| 9C***61 | Suspension Group-Seat | 1 |
1259205 Tachometer Gp
| 12***05 | Tachometer Group | 1 |
Power Train
1254243 Clutch Gp-Flywheel
| 12***43 | Clutch Group-Flywheel | 1 |
1259238 Control Gp-Flywheel Clutch
| 12***38 | Control Group-Flywheel Clutch | 1 |
1286821 Control Gp-Gearshift-Part 2 Of 2
| 12***21 | Control Group-Gearshift | 1 |
1286821 Control Gp-Gearshift-Part 1 Of 2
| 12***21 | Control Group-Gearshift | 1 |
1271661 Filter Gp-Power Train
| 12***61 | Filter Group-Power Train | 1 |
1288559 Final Drive Gp
| 12***59 | Final Drive Group | 1 |
1259236 Lines Gp-Power Train Oil-Part 1 Of 2
| 12***36 | Lines Group-Power Train Oil | 1 |
1259236 Lines Gp-Power Train Oil-Part 2 Of 2
| 12***36 | Lines Group-Power Train Oil | 1 |
1283214 Lines Gp-Pump
| 12***14 | Lines Group-Pump | 1 |
1305643 Pump Gp-Gear
| 13***43 | Pump Group-Gear; -Implement | 1 |
1283215 Pump Gp-Gear
| 12***15 | Pump Group-Gear; -Implement | 1 |
| 13***43 | Pump Group-Gear; -Implement | 1 |
| 5F***06 | Packing,Preformed Pump Mtg Part Of Kit P/N 5r***25 | 1 |
1233503 Pump Gp-Gear
| 12***03 | 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 |
9n4722 Transmission Gp
| 9N***22 | Transmission Group-Direct Drive | 1 |
5m7882 Universal Joint Gp
| 5M***82 | Universal Joint Group | 1 |
1272789 Valve Gp
| 12***89 | Valve Group | 1 |
1350812 Valve Gp-Relief
| 13***12 | Valve Group-Relief | 1 |
1350813 Valve Gp-Relief
| 13***13 | Valve Group-Relief | 1 |
1302564 Valve Gp-Selector & Pressure Control
| 13***64 | Valve Group-Selector & Press Cont | 1 |
Service Equipment And Supplies
1262500 Film Gp
| 12***00 | Film Group; Film Gp (D6fsr) | 1 |
8f9866 Grease Gun As
| 8F***66 | Grease Gun As | 1 |
Plate & Film Gp-Part 1 Of 2
| 12***00 | Film Group; Film Gp (D6fsr) | 1 |
| 3N***90 | Plate Serial Number; On R.H. Rear Bank Of Cylinder Block As Viewed From Rear Of Engine | 1 |
| 4B***58 | Screw (Identification Plate) Mounting | 10 |
Plate & Film Gp-Part 2 Of 2
| 12***97 | Film-Notice | 1 |
| 13***58 | Film; (Identification) (On Radiator Filler Cap) (On Near Of Radiator Filler Cap) | 1 |
| 1P***07 | Film-Symbol; 2 On Bottom Of Upper Frame Below Engine. 2 On Front Of Upper Frame Above Boom Articulation | 4 |
2y2578 Tool Gp-Hand
| 2Y***78 | Tool Group-Hand | 1 |
Steering And Braking System
1p1949 Clutch Gp-Steering
| 1P***49 | Steering Clutch Group | 1 |
1252793 Brake Gp-Steering
| 12***93 | Brake Group-Steering | 1 |
1254443 Control Gp-Parking Brake
| 12***43 | Control Group-Parking Brake | 1 |
1259208 Control Gp-Steering
| 12***08 | Control Group-Steering | 1 |
1259182 Mechanism Gp-Brake
| 12***82 | Mechanism Group-Brake | 1 |
D6F SR serial number reference
The PIN plate on a D6F SR is riveted to the mainframe, on the left side toward the rear of the tractor near the drawbar/ripper mount, low enough to read from ground level. Post-war Cat PINs on this era of machine run 8 characters: a 3-letter prefix identifying the model/configuration followed by a 5-digit sequence number (e.g. 5FR00001), so the first three letters are what ties a given unit to the D6F SR parts and service literature rather than a sibling D6 model.
| Prefix | Identifies | Notes |
|---|---|---|
| 5FR | D6F SR | Sole documented PIN prefix for the D6F SR track-type tractor, range 5FR00001-UP. Powered by the Cat 3306 diesel, a tie shared with the D6D SR/D6E SR/D6G SR siblings on the same aftermarket fitment listings. Sits in the SR lineage between D6E SR and D6G SR; service literature for this prefix is issued jointly with the D6G and D6G SR. Uses a direct-drive (clutch-shifted) transmission, confirmed via this exact model's own service parts catalog. No separate Std/XL/LGP/XW split documented for this prefix - SR itself is the configuration designation. Region/plant not documented in available sources. |
Frequently asked questions
What engine does the Caterpillar D6F SR use?
The D6F SR runs the Caterpillar 3306, a six-cylinder direct-injection diesel with mechanical governing. It predates ADEM and ECM engine control, so there is no electronic diagnostic connector on this generation.
What is the operating weight of the D6F SR?
Operating weight for this specific swamp/forestry configuration was not published in a standalone spec sheet and is not documented for the D6F SR. Its wide-track, low-ground-pressure undercarriage means it does not share the mainstream D6F's published weight figures; check with your dealer or the machine's OMM for the exact configuration in question.
What replaced the Caterpillar D6F SR?
The D6F SR was succeeded by the D6G SR within the same low-drive, wide-track SR sub-line. It sits between the D6E SR before it and the D6G SR after it, and is unrelated to the mainstream high-drive D6H/D6M/D6N/D6R/D6T lineage that developed separately.
What D6F SR owners discuss
What's the reputation of the 3306 engine in the D6F SR, and what tends to wear out first?
The mechanically-governed, direct-injection 3306 has a strong reputation for durability and simple field repair, but it has known pattern wear points on high-hour units. Water pump failure is the most common cooling-system complaint, showing up first as a slow coolant weep at the pump weep hole before going catastrophic. On the fuel side, worn or leaking injectors and injection-pump plungers let fuel dilute the crankcase oil, which can wipe out main bearings fast if caught late - a fuel smell on the dipstick is the tell. Cracked cylinder heads, dropped valves, and liner wear show up mostly on engines run past their rebuild interval without oil analysis. Naturally aspirated vs turbocharged arrangements of the 3306 pull differently under load, so power complaints should be weighed against which arrangement is actually fitted rather than assumed.
How do the transmission and steering clutches behave as they age on this drivetrain?
This SR-line generation runs a direct-drive (clutch-shifted) transmission with clutch-and-brake steering and final drives, confirmed for this exact model via its own service parts catalog. Common age-related symptoms are hesitation or a delayed bite when shifting between forward and reverse, and a steering clutch that drags or doesn't release cleanly instead of engaging crisply. Riding the brake pedals as a footrest accelerates brake wear and is a habit worth breaking on any operator new to the machine. A quick check for metal fines when draining the final drive and steering clutch compartments catches bearing wear before it becomes a teardown. Because steering clutch and brake condition directly affects the operator's ability to stop and hold the machine on a grade, have your dealer verify holding capacity and adjustment before relying on it in the field.
What's the typical complaint with the blade lift cylinders and hydraulic system?
Blade lift cylinder seal wear leading to blade drift is the main hydraulic complaint on this family - the D6F SR shares its lift cylinder and seal-kit design with the D6E, D6E SR, and D6G line, so wear behavior tracks closely across those machines. Around the higher end of a normal service life, piston seal leakage accounts for most of the drift a blade shows when set and left unattended; a blade that won't hold height under its own weight points there first. Control-valve end-plate leaks at the C-frame lift valve are also a reported nuisance on this generation. Since these are direct hydraulic (non-pilot) lift and tilt circuits typical of the era, a leak usually traces to a specific seal rather than an electronic control fault.
What wear pattern should I expect on the wide-track swamp/forestry undercarriage?
The SR designation on this machine means a wide, low-ground-pressure track and undercarriage built for swamp and forestry duty rather than the standard-gauge D6F. That wide-pad setup floats well in soft ground but takes heavier lateral (twisting) loads when a pad catches a stump, root, or rock on one edge - that side-load is what damages pin and bushing seals and lets lubricant escape, accelerating pin and bushing wear well beyond what a standard-gauge machine sees. Measuring pitch elongation across a run of several link pitches is the standard field check; an egg-shaped bushing bore is a sign it's due. Forestry-duty shoes lean toward a heavier-duty tread pattern than a general lighter-service shoe, since impact resistance matters more than raw flotation in timber ground. Keep track tension in spec - both too loose and too tight accelerate wear - and clear debris buildup regularly, since packed mud and slash both work against seal life in this application.
What commonly goes wrong with the electrical system?
This era of machine runs a simple charging system - alternator, regulator, and gauge cluster (ammeter, water temperature, oil pressure, fuel) - with no engine ECM or electronic sensors, since the 3306 is mechanically governed and mechanically injected. Owners of comparable machines from this generation more often trace intermittent dash lights or gauges to corroded grounds and connections than to the alternator itself, even when a charging fault is suspected. Ammeter and voltage-regulator wiring faults are a recurring theme as the harness and connectors age. Little of this is documented specifically for the D6F SR online; it's carried over from the wider D6C/D6D/D6E-era electrical experience, since the charging and gauge circuits didn't change much across that span.
Any quirks with cold starting or the ether starting aid?
Mechanical direct-injection engines like the 3306 can be stubborn to start cold, and an engine-mounted ether starting-aid canister was a common factory or dealer-fit option on machines of this generation. Correct use is short bursts sprayed only while cranking, not before or after, with a couple of seconds between bursts - flooding the intake with ether can cause damaging pre-ignition. Some operators of mechanical 3306-powered dozers report holding the throttle to the floor while cranking, then easing off once it fires, as an old-school technique for stubborn cold starts. Ether is flammable and should only be handled in a ventilated area with no open flame or smoking nearby when changing a canister.
What should I check before buying a used D6F SR?
First confirm it's genuinely the SR wide-track, low-ground-pressure swamp/forestry configuration and not a standard-gauge D6F wearing salvaged components - check the data plate and measure actual track gauge and shoe width, since this variant is uncommon and misidentified listings do turn up. Verify the engine and serial data match the 3306-powered D6F SR family rather than an adjacent D6D SR/D6E SR/D6G SR unit, since parts and documentation for this specific model are thin and easy to conflate with its siblings. Check the dipstick for a fuel smell (injector or injection-pump leakage into the oil) and inspect the water pump weep hole for coolant loss. Drain the final drive and steering clutch compartments and check for metal fines. Cycle the blade through full lift and tilt travel and watch for drift, which points to lift cylinder seal wear. Walk the undercarriage looking for pin/bushing seal damage and pad cracking typical of lateral loading in swamp or timber ground, and check the frame and C-frame generally for corrosion given the wet-ground service history typical of this configuration. Have your dealer verify steering clutch and brake holding capacity, and inspect for any structural cracking on the wide-track frame, before putting the machine to work.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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