Model Spotlight

Case 1150C Crawler Dozer: Specs, Parts & Common Issues

Produced 1978 - 1983, the Case 1150C is the C-generation large-frame Case crawler dozer - Case A451B inline six-cylinder diesel, power shift transmission with torque converter, and refined hydraulics over the 1150B predecessor. The 1150C ran concurrently with later 1150B production and represents the bridge between the long-running 1150B and the next-generation 1150D.

Broken Tractor Editorial Team• Updated May 2026• 10 min read

The Case 1150C Crawler Dozer is the C-generation large-frame Case crawler dozer, produced from 1978 through 1983. The 1150C continued the Case A451B inline six-cylinder diesel engine from the 1150B and original 1150, with refinements to the implement hydraulic system, operator station, and accessory packaging. Production overlapped with the long-running 1150B (1973-1984), and the 1150C ultimately gave way to the 1150D's longer 1983-1990 production run.

For owners and operators today, the 1150C is a refined version of the 1970s large-frame Case dozer platform: same proven A451B engine, refined power shift drivetrain, improved operator station relative to the 1150B, and broad parts cross-fit with the wider 1150 family.

The 1150C bridges the long-running B and D generations The 1150C's relatively short five-year production overlaps the late 1150B and predates the D-generation. Production-run-age 1150Cs are uncommon relative to the more widely deployed 1150B and 1150D in the used market. Parts cross-fit is strong across all three generations on most chassis, drivetrain, and undercarriage components.

At-a-glance specifications

Case 1150C - factory specifications

Production years: 1978 - 1983
Predecessor: Case 1150B (1973 - 1984, concurrent)
Successor: Case 1150D (1983 - 1990)
Engine: Case A451B inline 6-cylinder diesel
Displacement: 451 cu in (~7.4 L)
Power: ~110 - 120 horsepower flywheel (configuration dependent)
Transmission: Power shift with torque converter
Hydraulics: Open-center implement circuit (refined relative to 1150B)
Variants: Standard, LGP (Low Ground Pressure)
Operating weight: ~28,000 - 31,000 lb depending on configuration
Blade: 6-way bulldozer blade - angle and tilt blade options
Serial plate location: Right side of operator's platform / chassis frame

How the 1150C differs from the 1150B

Refined hydraulic valving - improved open-center implement hydraulics with updated valve response and refined cylinder seal designs.
Improved operator station - refined ROPS canopy, updated control layout, refined gauge cluster, improved seat mount.
Updated accessory packaging - alternator, starter, and accessory belt routing updated.
Same Case A451B 6-cyl engine - engine architecture unchanged from the 1150B, providing parts continuity.
Same power shift drivetrain - power shift with torque converter unchanged from the 1150B for parts service continuity.

Case A451B inline 6-cylinder engine

The 1150C continues the Case A451B inline six-cylinder diesel engine from the 1150B and original 1150. The A451 series is the larger Case 6-cyl diesel of the 1970s and early 1980s - 451 cubic inches of displacement (approximately 7.4 liters), inline naturally aspirated configuration. Approximately 110-120 horsepower flywheel in 1150C trim.

The A451B engine ecosystem is broad - accessory parts (water pump, alternator, starter, oil pump) share with other Case industrial 6-cyl applications of the era. Injection pump and injector service is well-documented. Cylinder kits, bearings, and complete engine overhaul parts are available through both Case dealer and aftermarket diesel-engine specialists. Browse the Case Dozer Parts hub for current 1150C engine service kits.

Power shift transmission with torque converter

The 1150C uses the same power shift transmission with torque converter as the 1150B. Clutchless gear changes under load, multiple forward and reverse speeds, torque converter providing smooth power transfer. Routine service items: shift solenoids and pressure switches, clutch packs, torque converter, transmission oil cooler, transmission filter.

The torque converter is a routine rebuild item on high-hour 1150Cs and is often paired with a transmission filter change at the same service interval.

Undercarriage

The 1150C undercarriage shares broad cross-fit with the 1150B and 1150D. Sprocket bolt patterns, idler geometries, master pin dimensions, and roller designs cross-fit on multiple components - confirm by part number against your serial. Track chain, roller, idler, and sprocket are all routine wear items at production-run age.

Browse the Case Dozer Parts hub for current 1150C-era undercarriage availability.

Blade system and hydraulics

The 1150C ships with a 6-way bulldozer blade - angle and tilt control hydraulically actuated. Larger blade than the 850-class machines below. Blade cylinders, blade-carrier slider blocks, and cutting edges are routine service items. Cutting edge replacement is generally needed every few hundred to few thousand hours of dozing depending on material and operator habit.

Hydraulic implement-circuit pressure is moderate by modern standards - the 1150C introduced refined open-center hydraulic valving relative to the 1150B. Seal kit availability for the blade cylinders is generally good, with aftermarket kits supporting most 1150C-era cylinder dimensions.

Variants: Standard, LGP

The 1150C shipped in two primary track configurations:

Standard - standard-width track, balanced general dozing.
LGP (Low Ground Pressure) - wider grouser pads and extended track frame for soft-ground / wetlands / agricultural-soil work.

Track configuration affects undercarriage and frame parts. Confirm Standard vs. LGP by serial before ordering.

Common 1150C service items

Engine accessory aging

Water pump, alternator, starter, and injection pump on the A451B are routinely rebuilt or replaced over the engine's service life. Cooling system service (radiator core flush or replacement, fan belt, hose set) is a routine maintenance milestone on 40-plus-year-old machines.

Power shift / torque converter service

Shift solenoid failure, clutch pack wear, torque converter degradation, and transmission oil cooler service are routine items at production-run age. The transmission filter and fluid should be on a scheduled service interval.

Hydraulic seal failure

Blade cylinder seal failures are common at this age. Cylinder rod chrome corrosion and seal weep are typical symptoms. Seal kit rebuilds address most cases; severe rod corrosion requires rod replacement.

Undercarriage replacement cycles

Track chains, rollers, idlers, and sprockets all have measurable wear lives. Modern aftermarket undercarriage is available for the 1150 family.

Operator station and ROPS

Cab and canopy hardware, seat cushion replacement, and floorboard wear are typical aging-machine issues. ROPS structural integrity should be verified before resale.

Wiring and electrical

40-plus-year-old wiring harnesses are routinely brittle. Hard starts, intermittent gauges, and dim lights are often traced to harness corrosion or insulation failure rather than the underlying component.

Parts and cross-fit components for the Case 1150C

Component area	What to look for	Notes
Sprockets & segments	Track sprocket assemblies, bolt-on segments	Cross-fits 1150 / 1150B / 1150D family on shared bolt patterns.
Idlers & rollers	Front idler assemblies, top and bottom roller sets	Cross-fits the 1150 large-class undercarriage.
Track recoil & adjusters	Recoil spring, adjuster yoke, chrome rod	Confirm by serial - production-run changes apply.
Master pins	Track master pin and bushing	Master pins share geometry across the 1150 family.
Cutting edges & end bits	Standard and severe-duty cutting edges, end bits	Aftermarket cutting edges widely available for the 1150's large blade.
Blade cylinder seal kits	Angle, tilt, lift cylinder seal kits	Confirm cylinder dimensions before ordering.
Engine accessory parts	Water pump, alternator, starter, fuel injection	Case A451B accessories share parts with other Case industrial 6-cyl applications.
Radiators & cooling	Radiator cores, fan belts, hose sets	Aftermarket radiator and cooling cross-fit available.
Filter service kits	Engine oil, fuel, air, hydraulic filter sets	Filter kits packaged by application speed routine service.
Power shift transmission parts	Shift solenoids, clutch packs, oil cooler, torque converter	Cross-fit with the 1150B / 1150D power shift family.
Operator seat	Universal industrial seat with mount kit	Universal Case industrial seats fit the 1150C operator station with standard mount kits.

For 1150C-era parts inventory and cross-fit confirmation, browse the Case Dozer Parts hub or contact our parts desk directly.

Working on a Case 1150C?

The 1150C is a refined 1970s/early-1980s large-frame machine with broad parts cross-fit across the 1150 family. Our specialists can verify Standard vs. LGP fitment by serial and walk you through the 1150 family's cross-fit options.

Mon - Fri, 7:00 AM - 5:00 PM CT

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Why the 1150C is still in service

The 1150C is a refined version of the 1970s/early-1980s large-frame Case dozer platform - substantial pushing power and stability for major dirt work, road maintenance, and large-acreage land-clearing. The Case A451B six-cylinder diesel is well-documented and well-supported. The power shift drivetrain with torque converter is simpler to troubleshoot in the field than the hydrostatic systems on the later 1150K / L / M generations.