Model Spotlight

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

Produced 2007 - 2013, the Case 1150K is the K-generation large-frame Case crawler dozer - Cummins QSB family inline six-cylinder turbocharged diesel spanning Tier 3 (early production) and Tier 4 Interim with cooled EGR + DPF (late production), hydrostatic dual-path transmission, and a substantially refreshed operator station with electronic instrumentation. The 1150K bridges the original hydrostatic 1150H and the Tier 4 Final 1150M.

Broken Tractor Editorial Team• Updated May 2026• 11 min read

The Case 1150K Crawler Dozer is the K-generation large-frame Case crawler dozer, produced from 2007 through 2013. The K-generation continues the hydrostatic dual-path drivetrain architecture introduced on the 1150H and bridges two emissions tiers: early-production 1150Ks (2007-2010 era) are Tier 3 machines; later-production 1150Ks (2011-2013 era) step up to Tier 4 Interim with cooled EGR and a diesel particulate filter (DPF). Confirm by serial and engine plate before ordering emissions-system parts.

For owners and operators today, the 1150K is the modern hydrostatic large-frame Case dozer with a refreshed operator station, electronic instrumentation, and (depending on serial) optional DPF aftertreatment service complexity. Early-production no-DPF Tier 3 1150Ks are popular in the used market for the same reason as the 850K - modern hydrostatic chassis without the Tier 4 Interim aftertreatment cycle.

The 1150K bridges Tier 3 and Tier 4 Interim emissions The 1150K's seven-year production spans a major emissions transition. Early production is Tier 3 (no DPF). Late production is Tier 4 Interim with cooled EGR + DPF. Service items differ substantially between the two - DPF regeneration cycles, ash service intervals, and EGR cooler internal leak risk apply only to late-production Tier 4i 1150Ks. Confirm by serial before ordering emissions-system parts.

At-a-glance specifications

Case 1150K - factory specifications

Production years: 2007 - 2013
Predecessor: Case 1150H (hydrostatic, early 2000s)
Successor: Case 1150M (2013 onward, Tier 4 Final SCR + DEF)
Engine - early production: Cummins QSB family inline 6-cyl turbocharged diesel, Tier 3
Engine - late production: Cummins QSB family Tier 4 Interim with cooled EGR + DPF
Displacement: ~6.7 L (configuration dependent)
Power: ~165 - 180 horsepower flywheel (configuration dependent)
Transmission: Hydrostatic dual-path
Emissions tier: Tier 3 (early production) to Tier 4 Interim (late production)
Variants: Standard, LT (Long-Track), LGP (Low Ground Pressure)
Operating weight: ~33,000 - 37,000 lb depending on variant
Hydraulic system: Load-sensing implement hydraulics, separate hydrostatic drive circuits
Blade: 6-way bulldozer blade - angle, tilt, lift hydraulically actuated
Serial plate location: Right side of cab platform, near operator entry

How the 1150K differs from the 1150H predecessor

Tier 3 emissions standard on early production; Tier 4 Interim with DPF on late production - internal engine refinements for emissions calibration. Late-production 1150Ks add cooled EGR and DPF aftertreatment.
Refreshed cab and electronics - improved HVAC, electronic instrumentation cluster, updated joystick control geometry, better visibility to the blade corners.
Refined hydrostatic drivetrain calibration - same dual-path architecture as the 1150H, with updated control software and refined charge pump configuration.
Updated engine - Cummins QSB family - moves from the 5.9 L 6BT-derived 6T-590 used on the 1150H to the larger ~6.7 L Cummins QSB family with more power and updated emissions calibration.
Higher operating weight - refined chassis and updated cab put the 1150K slightly heavier than the 1150H across all variants.

Variants: Standard, LT, LGP

The 1150K shipped in three primary track configurations:

Standard - standard-width track, balanced general dozing.
LT (Long Track) - extended-length track frame for additional flotation and stability.
LGP (Low Ground Pressure) - wider grouser pads with extended track frame for soft-ground / wetlands / agricultural-soil work.

Variant affects undercarriage parts. Confirm Standard vs. LT vs. LGP by serial before ordering.

Cummins QSB-family engine

The 1150K uses the Cummins QSB family inline six-cylinder turbocharged diesel - the larger-displacement evolution of the Cummins B-series industrial engine family used on prior 1150 generations. Approximately 6.7 L displacement. The QSB family supports both Tier 3 (early 1150K) and Tier 4 Interim (late 1150K) emissions calibration.

The Cummins QSB family parts ecosystem is broad - filters, injectors, water pumps, turbochargers, and complete rebuild components are widely available through both Case dealer and aftermarket Cummins channels. Browse the Case Dozer Parts hub for current 1150K engine service kits.

Tier 4 Interim emissions (late production)

Late-production 1150Ks add Tier 4 Interim emissions compliance via two main systems:

Cooled EGR

A portion of the exhaust is routed back through an EGR cooler, then mixed with the intake air before combustion. This reduces NOx emissions. The EGR cooler can develop internal leaks at production-run age. EGR valve fouling and stuck conditions are also routine.

Diesel particulate filter (DPF)

The DPF captures soot particles from the exhaust. Soot accumulates in the filter substrate during normal operation; periodic regeneration burns the soot off. Ash accumulates over time and requires DPF service / replacement / ash removal at a service interval typically measured in thousands of hours.

Both EGR and DPF service apply only to late-production Tier 4i 1150Ks - confirm by serial.

Hydrostatic dual-path transmission

The 1150K retains the hydrostatic dual-path architecture from the 1150H - each track has its own variable-displacement pump and hydraulic motor, controlled by joystick. The K generation refines the control software and updates charge pump configuration.

Hydrostatic service items: charge pump, charge filter, hydraulic motor seals, drive pump bearings, control valve degradation. Hydraulic oil cleanliness is critical - the hydrostatic system is intolerant of contamination.

Common 1150K service issues

Hydrostatic transmission service

Same hydrostatic-system service profile as the 1150H - charge pump, control valve, motor seal, oil contamination. Hydrostatic diagnosis usually requires dealer service tools for pressure testing.

Cummins QSB turbocharger wear

The turbocharger is a routine wear item on 10-plus-year-old engines. Symptoms: blue smoke at startup or under load, oil consumption climbing, audible whine outside the normal range, or visible shaft play.

DPF regeneration and ash service (late-production Tier 4i units)

Active regeneration cycles consume fuel and require a clear exhaust path. If the operator interrupts regeneration cycles frequently, soot accumulates faster than it can burn off. Ash service intervals depend on operation hours and idle profile.

EGR cooler internal leaks (late-production Tier 4i units)

Internal EGR cooler leaks are a routine production-run-age failure mode. Symptoms: coolant loss with no external leak, increased coolant in the intake, or white smoke under load.

Blade cylinder seal failure

Blade cylinder seal weep is normal at production-run age. Seal kit rebuilds address most cases.

Cutting edge wear

Cutting edge replacement is the most frequent blade-related service item on a 1150K in active service.

Cab electronics

The K-generation electronic instrumentation and joystick electronics are more sophisticated than the 1150H - they can develop intermittent fault codes from connector corrosion or harness wear at production-run age.

Parts and cross-fit components for the Case 1150K

Component area	What to look for	Notes
Sprockets & segments	Track sprocket assemblies, bolt-on segments	Variant-specific (Standard / LT / LGP) - confirm by serial.
Idlers & rollers	Front idler assemblies, top and bottom roller sets	Variant-specific roller counts and bushing dimensions.
Track recoil & adjusters	Recoil spring, adjuster yoke, chrome rod	K-generation hardware specific.
Master pins	Track master pin and bushing	Master pins share geometry across the 1150K family.
Cutting edges & end bits	Standard and severe-duty cutting edges, end bits	Aftermarket cutting edges widely available for the 1150K's large blade.
Blade cylinder seal kits	Angle, tilt, lift cylinder seal kits	Confirm cylinder dimensions before ordering.
Hydrostatic system service parts	Charge pump, charge filter, drive pump components	Hydrostatic-specific service items.
Engine accessory parts (Cummins QSB family)	Water pump, alternator, starter, fuel injection	Cummins QSB parts ecosystem.
Turbocharger (Cummins QSB)	Cummins QSB turbocharger	Aftermarket Cummins QSB turbocharger replacement available.
EGR + DPF service parts (Tier 4i late production)	EGR cooler, EGR valve, DPF service items	Late-production Tier 4i 1150Ks only.
Filter service kits	Engine oil, fuel, air, hydraulic filter sets	Tier 3 vs Tier 4i may require different kits.
Operator seat	Universal industrial seat with mount kit	Universal Case industrial seats fit the 1150K operator station.

For the complete 1150K parts inventory, browse the Case Dozer Parts hub.

Working on a Case 1150K?

The 1150K spans the Tier 3 to Tier 4 Interim emissions transition - early-production units have no DPF; late-production units do. Our specialists can verify Standard vs. LT vs. LGP fitment and emissions tier by serial.

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

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Where the 1150K sits in the Case dozer family

The 1150K is the K-generation large-frame Case crawler dozer, sitting between the Case 850K and the larger 1450 / 1550 / 1650 / 1850 classes. Its predecessor is the Case 1150H (early 2000s, first hydrostatic 1150) and its successor is the Case 1150M (2013 onward, Tier 4 Final SCR + DEF).