Case CX750D Hydraulic Excavator: 75-Ton D-Series Production Machine
Introduced in 2019, the Case CX750D is a 75-ton class D-Series hydraulic excavator built for mining, quarry, and large production earthmoving. It sits between the CX490D and the CX800 in Case's full-size excavator lineup, running a Tier 4 Final diesel through a hydrostatic dual-path drive and a steel-track undercarriage.
Where the CX750D fits in the Case excavator line
The CX750D is a 75-ton class D-Series hydraulic excavator. It slots between the CX490D and the CX800 in Case's full-size excavator lineup, aimed at mining, quarry, and large production earthmoving applications where machine weight, bucket capacity, and hydraulic power matter more than mobility.
Case CX750D Excavator - Quick Specs
- Class
- 75-Ton Excavator
- Generation
- D-Series
- Production
- 2019+
- Engine
- Tier 4 Final Diesel
- Drivetrain
- Hydrostatic Dual-Path
- Undercarriage
- Steel Track
- Tail Swing
- Conventional
- Smaller Sibling
- CX490D
- Larger Sibling
- CX800
Engine, hydraulics, and drivetrain
The CX750D runs a Tier 4 Final diesel engine through a hydrostatic dual-path drivetrain into a steel-track undercarriage. The main hydraulic pump (commonly a load-sensing piston pump) drives boom, dipper, bucket, swing, and propel circuits through electrohydraulic control valves.
Tier 4 Final emissions compliance means a DPF (diesel particulate filter), SCR (selective catalytic reduction) catalyst with DEF dosing, cooled EGR, and a common-rail fuel injection system feeding the engine. The aftertreatment package adds service requirements not present on earlier C-Series machines - DEF tank top-ups, periodic DPF regenerations, and NOx sensor service all factor into the maintenance budget.
Common service items on the CX750D
- Engine internals: Tier 4 Final diesel pistons, rings, sleeves, head gaskets, common-rail injection components.
- Tier 4 Final aftertreatment: DPF service and regeneration, DEF tank and dosing module, SCR catalyst, EGR cooler.
- Fuel system: Common-rail injectors, lift pump, primary and secondary filters with tight water-separator standards.
- Cooling system: Radiator, water pump, thermostat, fan, charge-air cooler, hoses, belts.
- Hydraulic system: Boom, dipper, bucket and swing cylinder seal kits, main pump rebuild, electrohydraulic control valves, hoses.
- Boom and dipper: Pin and bushing service at every joint, bucket pins, thumb attachment hardware, quick-coupler service.
- Undercarriage: Steel track chains, rollers, idlers, drive sprockets, recoil springs.
- Swing system: Swing motor and reduction gear, swing bearing, swing brake.
- Electrical / ECU: Engine ECU, instrument cluster, sensors, harness, telematics module on equipped units.
- Cab glass and wiper: KHN16820 24-inch wiper blade, KHN3046 front lower glass, and KHN2632 front upper glass cross-fit across Case and Link-Belt excavators.
- Operator station: Seat, joystick controls, pedal linkage, instrument panel, cab HVAC.
Parts we carry for the Case CX750D
| Category | Common Parts | Browse |
|---|---|---|
| Engine | Tier 4 Final diesel internals, gaskets, sleeves | Browse Engine |
| Aftertreatment | DPF, DEF, SCR, EGR components | Browse Aftertreatment |
| Fuel System | Common-rail injectors, lift pump, filters | Browse Fuel |
| Cooling | Radiator, water pump, charge-air cooler, hoses | Browse Cooling |
| Hydraulics | Main pump, swing motor, cylinders, seal kits, valves | Browse Hydraulics |
| Boom / Dipper | Pins, bushings, bucket and quick-coupler hardware | Browse Boom / Dipper |
| Undercarriage | Steel tracks, rollers, idlers, sprockets, recoil springs | Browse Undercarriage |
| Swing | Swing motor, reduction gear, swing bearing | Browse Swing |
| Cab Glass / Wiper | KHN16820 wiper, KHN3046 lower glass, KHN2632 upper glass (Case/Link-Belt cross-fit) | KHN16820 Wiper Blade |
| Electrical / ECU | ECU, sensors, harness | Browse Electrical |
| Operator Station | Seat, joysticks, pedal linkage, gauges | Browse Operator Station |
Need a part for your Case CX750D Excavator?
Tier 4 Final aftertreatment, common-rail fuel system components, and hydraulic main pumps are the highest-value items on a CX750D. Call our parts team with your serial number.
Request a PartWhat to verify before ordering
- Serial number. Confirm the machine serial before ordering year-specific parts - the D-Series saw running changes through production.
- Engine serial. Engine internal parts must match the engine serial number, not just the machine serial.
- Hydraulic cylinder bore. Seal kit fit depends on cylinder bore dimension - measure before ordering.
- Tier 4 emissions revision. DPF and DEF/SCR components saw revisions during production - confirm by serial.
- Engine ECU calibration. Common-rail injectors and ECU sensors are calibrated to specific build years.
- Bucket and quick coupler. Quick-coupler interface varies - confirm before ordering attachment-side hardware.
- Undercarriage configuration. Standard and mass-excavation undercarriage variants exist - confirm track shoe width and roller count.
Why the CX750D still earns a paycheck
The Case CX750D is a true production-class machine - 75-ton excavators are deployed for mining, quarry, large-scale site preparation, utility installation at scale, and heavy commercial earthmoving. At this size class, machine availability and parts response time directly drive job economics, so component-level support matters as much as the original purchase decision.
Maintenance priorities on a CX750D: clean fuel and tight water separation for the common-rail injection system, DPF regen behavior tracking, hydraulic oil condition monitoring, swing-bearing lubrication on schedule, steel-track tension and undercarriage wear monitoring, and pin and bushing service across the boom and dipper. Broken Tractor maintains parts coverage across the Case D-Series excavator family.
