Caterpillar D6G
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar D6G is a medium track-type tractor in Cat's D6 dozing class, used for site prep, land clearing, and general earthmoving, with an operating weight that runs roughly 15.4 to 17.5 tonnes (34,000-38,600 lb) depending on configuration. Power comes from the Cat 3306 diesel: a naturally aspirated 3306 on lower-output versions and a turbocharged 3306T on Series II and other higher-output configurations. It is a mechanically governed, direct-injection engine with no electronic engine control, rated at 119 kW (160 hp) net across the line, feeding a planetary power-shift transmission with three speeds forward and three reverse through a Caterpillar torque-divider power train. The D6G succeeded the Cat D6E in this role. It was built in two generations, D6G and D6G Series II, from the mid-1990s into the later 2000s, mainly for markets outside North America, Japan, and Europe. Caterpillar offered it in XL (standard-gauge) and LGP (low ground pressure, wide-track) undercarriage configurations, with straight, angling, and semi-universal blade options plus a multi-shank ripper.
The two generations differ in detail rather than a full redesign. Series II grew the fuel tank from about 300 L (79 gal) to 320 L (84 gal), runs a higher operating weight on the same 3306/3306T and power-shift driveline, and adds minor operator-station and hydraulic refinements, while both generations keep the same conventional, non-elevated-sprocket undercarriage layout. Because the D6G was built mainly for export and developing markets rather than North America, it left a large population of simply engineered, low-electronics machines behind. That is exactly why it still matters in the used and parts market: no ECM, no emissions aftertreatment, and a widely supported 3306-family engine and power-shift driveline make the D6G an attractive rebuild-and-run machine, with engine, undercarriage, and hydraulic parts still readily available through the aftermarket.
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 D6G specifications
Engine
| Engine model | Cat 3306T, 6-cylinder, 4-stroke diesel, turbocharged, direct injection |
| Net power | 119 kW (160 hp) at 1,900 rpm, factory net flywheel rating |
| Maximum flywheel power | 131 kW (175 hp) |
| Displacement | 10.5 L (640 cu in) |
| Bore x stroke | 121 mm x 152 mm (4.75 in x 6.00 in) |
| Altitude capability | Full power to 2,300 m (7,500 ft) without derate |
| Emissions | No formal emissions-tier certification published for this model; it predates modern Tier/Stage regulation |
| Cooling | Engine oil-to-water cooler fitted for added cooling capacity |
Weights
| Operating weight, standard configuration | 15,435 kg (34,028 lb), base D6G configuration |
| Operating weight, XL configuration (Series II) | 16,880 kg (37,219 lb) |
| Operating weight, LGP configuration (Series II) | 17,500 kg (38,581 lb) |
| Shipping weight, XL configuration (Series II) | 13,840 kg (30,519 lb) |
| Note | Operating weight varies notably by series and configuration (standard vs XL vs LGP); treat these as separate figures rather than one universal number |
Dimensions
| Height to top of cab | Approx. 3.20 m (10.5 ft); Series II ROPS/canopy height is listed separately at 3.06 m (10.03 ft) |
| Length, track on ground (Series II) | 2,667 mm (105 in) |
| Width without blade (Series II) | 2,440 mm (96.1 in) |
| Ground clearance | 310 mm (12.2 in) |
| Track gauge | 1,880 mm (6.17 ft / 74 in) |
| Track shoe width | 560 mm (22 in) extreme-service and 610 mm (24 in) moderate-service shoes offered; wider LGP-style shoes available for low ground pressure work |
| Undercarriage | Oval, non-elevated sprocket roller frame with sealed and lubricated track chain (distinguishes D6G from the elevated-sprocket D6H line of the same era) |
Performance
| Transmission | Planetary powershift transmission, three forward and three reverse speed ranges, oil-cooled clutches with modulated shifting for smooth speed and direction changes |
| Forward travel speeds (1st-3rd) | 4.0 km/h, 6.9 km/h, 10.8 km/h (2.5, 4.3, 6.7 mph) |
| Reverse travel speeds (1st-3rd) | 4.8 km/h, 8.4 km/h, 12.9 km/h (3.0, 5.2, 8.0 mph) |
| Drawbar pull | Not documented in available published sources for this specific model; verify with dealer or service manual for the exact configuration |
| Ground pressure | Not documented in available published sources for this specific model; ground pressure on this machine depends on which track shoe width is fitted, so it varies by configuration |
| Gradeability | Not documented in available published sources for this specific model |
| Ripper (factory option) | Fixed parallelogram multi-shank ripper offered, with shank arrangement adjustable to ground conditions |
Blades
| Straight blade capacity | 3.79 m³ (5.0 yd³) |
| Angling blade capacity | 2.40 m³ (3.14 yd³) |
| Semi-universal blade capacity | 3.27 m³ (4.28 yd³), built for penetration and side loading in tough digging applications |
| Blade availability | Straight and angling blades offered as standard options; semi-universal blade offered as a factory option |
Service capacities
| Fuel tank | 320 L (84 gal) |
| Hydraulic/implement system | 47 L (12.4 gal) |
| Cooling system | 39 L (10.3 gal) |
| Engine crankcase (with filter) | 27 L (7.3 gal) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
D6G fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (incl. filter) | 27 L (7.3 US gal / 6.1 UK gal) | D6G runs the Cat 3306 (NA) or 3306T (turbocharged) inline-six diesel. Use Cat DEO diesel engine oil: SAE 15W-40 for ambient -9.5°C to 50°C (15°F to 122°F), SAE 10W-30 for -18°C to 40°C (0°F to 104°F). Straight-grade SAE 30 or SAE 10W apply in the OMM's narrower cold-weather bands below that. |
| Cooling system | 39 L (10.3 US gal / 8.6 UK gal) | Cat DEAC (Diesel Engine Antifreeze/Coolant) mixed 50/50 with water; raise to about 60% concentration where extra freeze protection is needed. DEAC-filled systems need periodic SCA conditioning. Full-strength Cat ELC is an accepted no-SCA extended-life alternative on later production. |
| Fuel tank | About 300 L (79 US gal) on early D6G; 320 L (84 US gal) on D6G Series II — varies by series | No. 2-D diesel fuel per the OMM; switch to a winter-grade blend in cold ambient to control fuel waxing/gelling. |
| Powertrain — powershift transmission + bevel gear/steering clutch compartments (OMM treats as one combined refill point, not split) | 93 L (24.5 US gal / 20.4 UK gal) | Cat TDTO (TO-4 spec Transmission/Drive Train Oil). SAE 30 for 0°C to 35°C (32°F to 95°F); SAE 10W for colder ambient down to about -20°C (-4°F). Transmission, bevel gear, and steering clutch share one common sump and one fill spec on this machine — the OMM does not break these out as separate refill capacities. |
| Final drives (each side) | 19 L (5 US gal / 4.2 UK gal) per side | Cat TDTO, same grade selection by ambient temperature as the powertrain compartment. |
| Hydraulic system/tank | 47 L (12.4 US gal / 10.3 UK gal); figures as high as 49 L also appear for this tank — confirm your exact serial range's fill with a dealer | Cat TDTO is the fill spec for this era (same oil class later marketed as Cat HYDO on newer machines); grade picked by ambient temperature the same way as powertrain oil. |
| Pivot shaft / equalizer bar | Not listed as a separate oil-fill point in the OMM | Grease-lubricated through a fitting only; no bulk refill volume is specified. Service on the OMM's periodic lubrication interval. |
| Grease (all fittings) | Applied per fitting until purge; not a bulk-reservoir capacity | Cat Multipurpose grease, NLGI 2, for ambient -30°C to 40°C (-22°F to 104°F). A moly-fortified Cat grease is called for at pivot pins and other high-load points per the OMM's lubrication chart. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar D6G maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
| Every 6,000 h |
|
Servicing the D6G beyond the schedule
Predictive Maintenance & Fluid Analysis
The D6G's mechanically governed 3306/3306T has no ECM and throws no fault codes, so scheduled oil sampling is the main early-warning system. Pull an S·O·S sample at every engine oil change and again at power-train and hydraulic oil changes; watch for rising iron and copper that flag injection-pump, turbocharger, or power-shift clutch wear before failure. Track coolant condition closely too — corrosion inhibitor depletion in the wet-sleeve 3306 block leads to cylinder liner cavitation if left unchecked between cooling-system services.
Corrective & Common Repairs
Typical D6G repairs center on the fuel system, turbo, and power-shift clutches. Aging injection pumps and worn nozzles show up as hard starting, smoke, and rough idle; on 3306T machines, listen for turbo bearing whine or oil seepage at the compressor housing. Torque-divider and power-shift clutch packs wear from delayed transmission oil changes, showing up as slipping shifts or overheating. Final-drive seals and sealed-track pins and bushings are the other common wear points. With no diagnostic codes, repairs lean on pressure checks, oil analysis trends, and mechanical symptoms, not a scan tool.
Overhaul & Rebuild Points
The 3306/3306T long block is a rebuildable design; plan an inframe or full overhaul once compression, blow-by, and oil consumption trend past acceptable limits rather than waiting for failure. The power-shift transmission and torque divider are typically rebuilt as a unit when clutch packs and bearings wear out together. Undercarriage is the other major rebuild item on the sealed and lubricated track system: chain, shoes, rollers, idlers, and sprockets wear as a matched set and should be evaluated together, not replaced piecemeal, to avoid mismatched wear rates.
Seasonal & Environment Servicing
Most D6G units worked hot, dusty, or wet climates outside North America, so seasonal servicing skews toward heat and moisture management. Service the air-cleaner pre-cleaner and element more often in dusty conditions to protect the mechanically governed 3306. Clean the hinged radiator guard and core before hot-season work to prevent overheating. Drain the fuel/water separator more frequently in humid or rainy regions. On LGP machines working soft or swampy ground, check track tension and shoe condition more often, since wide self-cleaning shoes load differently than standard XL track.
D6G fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| No engine ECM / no MID-CID-FMI or flash-code system | The D6G's Cat 3306 (naturally aspirated) / 3306T (turbocharged) engine runs a mechanical fuel-injection pump with a flyweight/dashpot governor. There is no engine control module on this machine, so it cannot generate electronic diagnostic codes of any kind. | Not a fault - this is the factory design for this engine generation. Electronic diagnostic codes only appear on later, electronically governed medium dozers. | Diagnose engine complaints with mechanical methods: governor and injection-pump adjustment procedures, compression and injector-pop checks, and the analog instrument-panel gauges. A digital scan tool has nothing to read on this engine. |
| Coolant Temperature warning lamp (red, thermometer symbol on instrument panel) | Engine coolant temperature has risen above the normal operating range. | Low coolant level, debris-plugged radiator core, slipping or worn fan drive/belt, or a stuck thermostat. | Stop the tractor and let it idle down or shut off to cool before opening the system. Check coolant level once safe, inspect the radiator core and fan drive, and pressure-test the cooling system if overheating repeats. |
| Engine Oil Pressure warning lamp (red, oil-can symbol on instrument panel) | Engine oil pressure has dropped below the safe minimum for current engine speed. | Low oil level, a plugged oil filter forcing the bypass open, a worn oil pump, or worn main/rod bearings. | Shut the engine down immediately rather than continuing to run it. Check oil level and filter condition before any restart, and check oil pressure with a mechanical gauge to confirm the reading before further diagnosis. |
| Charging System warning lamp (red, battery symbol on instrument panel) | The charging circuit is not producing adequate voltage to keep the battery charged. | A slipping or broken alternator drive belt, a failed alternator, a faulty regulator, or loose/corroded battery and charging-circuit connections. | Check belt condition and tension first, then inspect wiring and battery terminals for corrosion, and bench- or load-test the alternator if the wiring checks out. |
| Air Cleaner service indicator (yellow/red flag or gauge on the air intake line) | Air filter restriction has reached the point where the element needs servicing. | A clogged primary or secondary air filter element from dusty site conditions. | Service or replace the restricted filter element and reset the indicator. Do not clean past the manufacturer's recommended number of services on a paper element. |
| Transmission Oil Temperature warning lamp or gauge in high range | Powershift transmission oil temperature has exceeded the normal operating range. | Low transmission oil level, dragging or slipping clutch packs, a plugged transmission oil cooler, or sustained heavy load in a low gear. | Reduce load or shift to a gear suited to the work, check transmission oil level, and inspect the oil cooler for blocked fins or restricted flow. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
D6G attachments & work tools
Blades
The D6G offers three blade types per Cat's factory catalog: 6A angling (2.40 m3 / 3.14 yd3 capacity, about 2325 kg / 5126 lb shipping weight), 6S straight (3.07 m3 / 4.02 yd3, about 1998 kg / 4405 lb), and 6SU semi-universal (3.80 m3 / 4.96 yd3, about 2460 kg / 5423 lb). A power-angle-tilt (PAT) blade arrangement was also offered on the D6G for 6-way grading work, and Cat's own weight tables use a PAT-type blade as the baseline for measuring operating weight. VPAT is not documented for the D6G in factory literature - that feature belongs to the elevated-sprocket H/R-series family (introduced on D4H/D5H); treat any VPAT claim tied to a D6G as unverified.
Rippers
The D6G's rear ripper is cataloged as the No. 6 parallelogram ripper, hydraulically operated and offered in single-shank or multi-shank configurations depending on ground conditions; installed weight with the base shank arrangement runs about 1500 kg (3300 lb), with weight scaling up in multi-shank trim. The shank/tip hardware for this ripper class carried forward onto later D6M/D6N/D6R machines in the same size bracket. Exact digging depth and ramp angle figures vary by shank-pin hole setting - confirm against a current dealer parts/service reference before quoting a specific number.
Winches
A PA56-class towing winch (Paccar/Carco winch group) is the factory-fit winch for D6G power-shift tractors, PTO/mechanically driven off the transmission with single-lever cable or electric clutch-and-brake control and freespool for hand payout. Installed weight runs roughly 1.1-1.6 t depending on configuration; the drum takes 22 mm (0.88 in) recommended wire rope with about 88 m (290 ft) of capacity, 25 mm (1 in) optional rope with less capacity. This same PA56 winch class also served D6D and later D6R tractors, so winch fitment carried across those generations on this chassis size.
Drawbars/counterweights
Cat's factory weight tables for the D6G measure operating weight with a rigid drawbar and front towing device included as base equipment, so a rear drawbar was standard/common fitment rather than a rare option, typically paired with the PAT or straight blade. Stackable rear counterweight slabs were used across this dozer class to rebalance ripper-equipped or drawbar-towing configurations, but a D6G-specific counterweight weight breakdown isn't confirmed in the factory literature reviewed - verify slab weight and count against a dealer parts listing for this exact machine and serial range.
Cab/ROPS guarding options for forestry/waste configs
The D6G was offered with either a ROPS/FOPS canopy or an enclosed ROPS cab. For forestry and waste-handling duty, sweeps plus front, side and rear screens were fitted around the operator station to deflect brush and flying debris, alongside a blade-mounted trash rack, guarded and quick-release radiator doors, and seal guarding at the final drives, pivot shaft and idlers to stop wire and cable from wrapping those components. A waste-handling configuration existed for the D6G, with guarding similar to Cat's D6R-and-up waste handling arrangement (radiator/engine enclosure guarding, striker bars, seal guards) — confirm exact feature availability for your D6G with your dealer.
Hydraulic arrangement notes for front/rear tools
D6G implement hydraulics mount at the dash and can be configured with additional valve sections depending on the attachment set, flowing about 167 L/min (44 gpm) at 1900 rpm through a 47 L (12.4 US gal) reservoir, lift relief valve set around 15500 kPa (2250 psi); a mid-configuration hydraulic installation weighs about 318 kg (700 lb). A base setup runs blade lift only; adding angle/tilt (PAT) control or a rear-mounted ripper or winch calls for extra valve sections beyond the base configuration.
All D6G assemblies by section
Every catalogued assembly group for the Caterpillar D6G. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Electrical System
9g9813 Alarm Group-24v
| 9G***13 | Alarm Group; -Action-Action, Engine Overspeed | 1 |
Battery And Wiring (2421693 N/S)-Part 1 Of 6
| 24***93 | Battery And Wiring | 1 |
Battery And Wiring (2421693 N/S)-Part 6 Of 6
| 24***93 | Battery And Wiring | 1 |
Battery And Wiring (2426970 N/S)-With Ems-Part 2 Of 6
| 24***70 | Battery And Wiring | 1 |
Battery And Wiring (2426970 N/S)-With Ems-Part 5 Of 6
| 24***70 | Battery And Wiring | 1 |
Battery And Wiring (2426970 N/S)-With Ems-Part 4 Of 6
| 24***70 | Battery And Wiring | 1 |
Battery And Wiring (2426970 N/S)-With Ems-Part 6 Of 6
| 24***70 | Battery And Wiring | 1 |
Battery And Wiring (2421693 N/S)-Part 3 Of 6
| 24***93 | Battery And Wiring | 1 |
Battery And Wiring (2421693 N/S)-Part 2 Of 6
| 24***93 | Battery And Wiring | 1 |
Battery And Wiring (2421693 N/S)-Part 5 Of 6
| 24***93 | Battery And Wiring | 1 |
Battery And Wiring (2426970 N/S)-With Ems-Part 1 Of 6
| 24***70 | Battery And Wiring | 1 |
Battery And Wiring (2426970 N/S)-With Ems-Part 3 Of 6
| 24***70 | Battery And Wiring | 1 |
Battery And Wiring (2421693 N/S)-Part 4 Of 6
| 24***93 | Battery And Wiring | 1 |
2238902 Harness Assembly
| 22***02 | Harness Assembly | 1 |
2321642 Harness Assembly
| 23***42 | Harness Assembly | 1 |
1352473 Harness Assembly
| 13***73 | Harness Assembly | 1 |
2238907 Harness Assembly
| 22***07 | Harness Assembly | 1 |
2238899 Harness Assembly
| 22***99 | Harness Assembly | 1 |
2238909 Harness Assembly
| 22***09 | Harness Assembly | 1 |
1246463 Harness Assembly-Engine
| 12***63 | Harness Assembly-Engine | 1 |
2238905 Harness Assembly-Engine
| 22***05 | Harness Assembly-Engine | 1 |
2402832 Harness Assembly-Heater And Wiper
| 24***32 | Harness Assembly-Heater And Wiper | 1 |
2433447 Harness Assembly-Operator Module-Part 2 Of 2
| 24***47 | Harness Assembly-Operator Module | 1 |
2421692 Harness Assembly-Operator Module-Part 1 Of 2
| 24***92 | Harness Assembly-Operator Module | 1 |
2421692 Harness Assembly-Operator Module-Part 2 Of 2
| 24***92 | Harness Assembly-Operator Module | 1 |
2433447 Harness Assembly-Operator Module-Part 1 Of 2
| 24***47 | Harness Assembly-Operator Module | 1 |
2402830 Harness Assembly-Roof
| 24***30 | Harness Assembly-Roof | 1 |
7n0718 Disconnect Switch Assembly
| 7N***18 | Switch As-Disconnect; -Battery-Ground Level | 1 |
Fuel System
Fuel Tank (2396716 N/S)-300 Liters
| 23***16 | Fuel Tank | 1 |
Operator Station
Cab (2366915 N/S)-Non-R.O.P.S.-Part 3 Of 4
Cab (2366915 N/S)-Non-R.O.P.S.-Part 4 Of 4
Cab (2366915 N/S)-Non-R.O.P.S.-Part 1 Of 4
Cab (2366915 N/S)-Non-R.O.P.S.-Part 2 Of 4
Cab Arrangement (2426969 N/S)-Non R.O.P.S.-With Ems
| 23***38 | Non Rops Mounting | 1 |
| 23***39 | Non Rops Mounting | 1 |
| 23***15 | Cab | 1 |
Cab Arrangement (2366914 N/S)-Non R.O.P.S.
| 23***38 | Non Rops Mounting | 1 |
| 23***39 | Non Rops Mounting | 1 |
| 23***14 | Cab Arrangement | 1 |
Cab Wiring (2366918 N/S)-Part 2 Of 2
| 23***18 | Cab Wiring | 1 |
Cab Wiring (2366918 N/S)-Part 1 Of 2
| 23***18 | Cab Wiring | 1 |
2387019 Harness Assembly-Part 1 Of 2
| 23***19 | Harness Assembly-Dash | 1 |
2387019 Harness Assembly-Part 2 Of 2
| 23***19 | Harness Assembly-Dash | 1 |
Heater (2366916 N/S)-Part 2 Of 2
| 23***16 | Heater | 1 |
Heater (2366916 N/S)-Part 1 Of 2
| 23***16 | Heater | 1 |
Hood And Dash (2396702 N/S)
| 23***02 | Hood And Dash | 1 |
Instrument (2427285 N/S)-With Ems-Part 2 Of 2
| 24***85 | Instrument | 1 |
Instrument (2397126 N/S)-Part 2 Of 2
| 23***26 | Instrument | 1 |
Instrument (2427285 N/S)-With Ems-Part 1 Of 2
| 24***85 | Instrument | 1 |
Instrument (2397126 N/S)-Part 1 Of 2
| 23***26 | Instrument | 1 |
Mirror (2396709 N/S)
| 23***09 | Mirror Group-Rear View; -Interior | 1 |
Non-R.O.P.S. Mounting (2337339 N/S)
| 23***39 | Non Rops Mounting | 1 |
Non-R.O.P.S. Mounting (2337338 N/S)
| 23***38 | Non Rops Mounting | 1 |
9g7641 Start Switch Group
| 9G***41 | Switch Group-Start; -Engine, Key-Vims Service | 1 |
2418771 Washer Bottle Group
| 24***71 | Washer Bottle Group | 1 |
Wiper (2366917 N/S)-Part 2 Of 2
Wiper (2366917 N/S)-Part 1 Of 2
1126174 Wiper Switch Assembly
| 11***74 | Wiper And Washer Switch Assembly; (Wiper, Washer)(Wiper, Washer, Rear) | 1 |
D6G serial number reference
The PIN plate on a D6G is riveted to the mainframe, typically on the right-hand side near the front of the tractor below the radiator/grille area, with the number often duplicated by a stamping on the frame itself. Read the first three characters as the letter prefix, which identifies the model, generation, and configuration/production block (for example BWJ, P6G, C6G, A6H); the digits that follow are the sequential unit number within that block, counting up from the block's starting point (e.g., a plate reading P6G01512 is unit 512 of the P6G block, which begins at P6G01000).
| Prefix | Identifies | Notes |
|---|---|---|
| BWJ | D6G (first generation) | PIN block for the original D6G track-type tractor, built on the oval (non-elevated) sprocket undercarriage. Uses the Cat 3306T turbocharged diesel, a roughly 119 kW (160 hp) class inline-six of about 10.5 L displacement. This is the main parts-catalog prefix for the base D6G; whether Std, XL and LGP configurations were split into separate sub-prefixes within this block or grouped under BWJ is not documented in available sources - confirm exact configuration with a dealer using the full PIN. |
| P6G | D6G Series II (D6G2) XL | PIN block for the D6G Series II in XL configuration, starting at unit 01000. Carries the same Cat 3306T engine family as the first-generation D6G, rated about 119 kW (160 hp). The Series II update refreshed the hydraulics and operator station while keeping the oval-track undercarriage. D6G Series II machines stayed in Caterpillar's lineup as a lower-cost model for emerging-market distribution long after the D6H/D6R/D6T took over as the mainstream medium dozer in North America. |
| C6G | D6G Series II (D6G2) XL | Another PIN block tied to the D6G Series II XL configuration, same 3306T engine and XL setup as the P6G block. Its production sequence relative to P6G (earlier or later) is not documented in available sources - confirm with dealer. A parallel D6G Series II LGP configuration exists, but no dedicated LGP prefix could be confirmed from available sources - confirm with dealer. |
| A6H | D6G Series II (D6G2) | PIN block tied to a D6G II operation and maintenance manual; exact undercarriage configuration (XL vs LGP) isn't stated - confirm with dealer using the full PIN. |
Frequently asked questions
What engine powers the Caterpillar D6G?
The D6G uses the Cat 3306 diesel: naturally aspirated 3306 on lower-output versions and turbocharged 3306T on Series II and other higher-output configurations. It's a mechanically governed, direct-injection engine with no electronic engine control, rated at 119 kW (160 hp) net.
What is the operating weight of the D6G?
Operating weight depends on configuration and series. Standard/XL machines run roughly 15,400-16,900 kg (34,000-37,200 lb), and LGP (low ground pressure) configurations run heavier, up to about 17,500 kg (38,600 lb) with a full fuel tank and operator aboard. Confirm the exact configuration and series before quoting a specific figure.
What replaced the Caterpillar D6G?
Caterpillar didn't carry the D6G designation forward under a single named successor. It was phased out in favor of later, more advanced D6-series track-type tractors as Cat's driveline and engine designs moved on from this mechanically governed platform. Check the serial prefix and market on a specific unit to identify which later D6 model it transitioned to.
What D6G owners discuss
What is the D6G's drivetrain actually like to run day to day?
Does the blade hydraulics on a D6G have any known quirks?
What undercarriage wear pattern should an owner expect on a D6G?
What engine quirks come up specifically with the D6G's 3306 engine?
Are there common electrical or sensor issues on the D6G?
How does steering work on the D6G, and what wears out?
What should you check before buying a used D6G?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Need a specific D6G part?
Search live OEM part data, check fitment, and cross-reference alternatives with Heavy Parts AI.