Model Spotlight

Case 750K Crawler Dozer: Specs, Parts & Common Issues

The Case 750K is the K-generation mid-large frame Case crawler dozer - Tier 4 Interim emissions, refined Cummins B-series turbocharged four-cylinder diesel, hydrostatic dual-path transmission, and a substantially upgraded operator cab over the 750H predecessor. The K generation introduced cooled exhaust gas recirculation (EGR) and a diesel particulate filter (DPF) to meet Tier 4 Interim - both significant new service items.

BT

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

The Case 750K Crawler Dozer is the K-generation mid-large frame Case crawler dozer, produced approximately 2010 - 2015. The K generation continues the hydrostatic dual-path drivetrain architecture introduced on the 750H and adds Tier 4 Interim emissions compliance - cooled exhaust gas recirculation (cooled EGR) plus a diesel particulate filter (DPF) that captures and periodically regenerates soot from the exhaust stream. The operator station got a substantial refresh: improved sightlines to the blade corners, electronic instrumentation, and updated joystick control geometry.

The 750K is generally regarded as the most refined version of the hydrostatic mid-large frame Case dozer before the Tier 4 Final transition. Service profile is similar to the 750H (hydrostatic drivetrain, Cummins B-series engine, broad mid-class parts cross-fit) with the addition of Tier 4 Interim emissions service points (DPF regeneration, EGR cooler service).

At-a-glance specifications

How the 750K differs from the 750H predecessor

• Tier 4 Interim emissions - cooled EGR + DPF added. The DPF captures soot and regenerates periodically.
• Refreshed cab and electronics - improved HVAC, electronic instrumentation cluster, updated joystick control geometry, better visibility to the blade corners.
• Updated hydrostatic drivetrain calibration - same dual-path architecture as the 750H with refined control software and updated charge pump configuration.
• Blade-carrier hardware cross-fit carried forward - most blade-carrier wear items (slider blocks, wear plates) carry forward from the 750H. Confirm by part number against serial.
• Suspension seat updated - the 359121A1 suspension seat fits the 750K (broad H/K/L Case dozer cross-fit).

Variants: Standard, LT, LGP

The 750K 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 (track pads, idlers, frame components). Confirm Standard vs. LT vs. LGP by serial before ordering.

Tier 4 Interim emissions system

The Tier 4 Interim emissions package on the 750K combines two main systems:

Cooled EGR (exhaust gas recirculation)

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 - failure mode is coolant loss into the intake or exhaust side. EGR valve fouling and stuck conditions are also routine. EGR system codes are common on aging Tier 4i engines.

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 (passive regeneration during heavy-load operation, active regeneration when the engine commands an injection cycle). 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 should be on a maintenance schedule for 750K owners.

Cummins B-series engine

The 750K continues the Cummins B-series industrial engine lineage from the 750H, with Tier 4 Interim updates. Filters, injectors, water pump, alternator, and turbocharger components remain readily available through both Case dealer and aftermarket Cummins channels. The fundamental engine architecture is unchanged; what's new is the emissions calibration and the aftertreatment.

Browse the Case Dozer Parts hub for current 750K-era engine and emissions service kits.

Hydrostatic dual-path transmission

The 750K retains the hydrostatic dual-path architecture from the 750H - 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.

Blade-carrier and operator-station cross-fit

Many 750K wear items cross-fit with the 750H below and (on a more limited basis) with the 750L above. Notable confirmed cross-fits:

• The 359121A1 Case / New Holland dozer suspension seat with headrest covers the 750K (and 550H, 650H, 650K, 650L, 750L, 850H, 850K, 850L). One SKU covers nine machines.
• Many blade-carrier slider blocks and wear plates carry forward from the H generation. Confirm by part number against your serial.

Common 750K service issues

DPF regeneration and ash service

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 - eventually triggering forced regeneration warnings or DPF service codes. Ash service intervals depend on operation hours and idle profile.

EGR cooler internal leaks

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.

Hydrostatic transmission service

Same hydrostatic-system service profile as the 750H - charge pump, control valve, motor seal, oil contamination. Hydrostatic diagnosis usually requires dealer service tools for pressure testing.

Blade carrier wear plate replacement

Blade carrier slider blocks and wear plates are routine sacrificial service items. Many components cross-fit with the 750H.

Cutting edge wear

Cutting edge replacement is the most frequent blade-related service item. End bits wear faster than the center cutting edge due to corner load concentration during dozing.

Cab electronics

The K-generation electronic instrumentation and joystick electronics are more sophisticated than the 750H - they can develop intermittent fault codes from connector corrosion or harness wear at production-run age.

Parts we carry

For the complete 750K parts inventory, browse the Case Dozer Parts hub.

Where the 750K sits in the Case dozer family

The 750K is the K-generation mid-large frame Case crawler dozer, sitting between the Case 650K and the Case 850K. Its predecessor is the Case 750H (hydrostatic, pre-Tier 4i) and its successor is the Case 750L - which steps up to Tier 4 Final emissions with SCR + DEF aftertreatment.