Case CX350C Hydraulic Excavator: Tier 4 Interim 35-Ton C-Series
The Case CX350C is the C-Series 35-ton class hydraulic excavator, sitting between the CX350B and the CX350D in Case's full-size excavator lineup. It brought Tier 4 Interim emissions, common-rail diesel injection, and refined electrohydraulic controls to the 35-ton platform.
Where the CX350C fits in the Case excavator line
The CX350C is a 35-ton class C-Series excavator, sitting between the CX350B and the CX350D in Case's full-size excavator lineup. The C-Series brought Tier 4 Interim emissions compliance to the 35-ton platform, with a common-rail diesel engine, refined electrohydraulic control, and an updated operator station while retaining the proven conventional tail swing layout and steel-track undercarriage of the prior B-Series.
Case CX350C Excavator - Quick Specs
- Class
- 35-Ton Excavator
- Generation
- C-Series
- Engine
- Tier 4 Interim Diesel
- Drivetrain
- Hydrostatic Dual-Path
- Undercarriage
- Steel-Track
- Tail Swing
- Conventional
- Serial Plate
- RH side of lower cab frame, below windshield
- Predecessor
- CX350B
- Successor
- CX350D
Engine, hydraulics, and drivetrain
The CX350C runs a Tier 4 Interim diesel through a hydrostatic dual-path drivetrain into a steel-track undercarriage. A load-sensing main piston pump feeds boom, dipper, bucket, swing, and propel circuits through electrohydraulic control valves. The common-rail fuel system and aftertreatment package (DPF, with DEF/SCR on later builds depending on configuration) place strict requirements on fuel cleanliness and DEF quality.
The undercarriage uses Case-pattern steel tracks, sealed-and-lubricated track chains, planetary final drives, and conventional rollers, idlers, and sprockets. Swing is driven by a hydraulic swing motor and reduction gearbox riding on a large-diameter swing bearing.
Common service items on the CX350C
- Engine internals: Tier 4 Interim diesel pistons, rings, sleeves, head gaskets, bearings. Common-rail injection components.
- Aftertreatment: DPF service intervals and regeneration behavior; DEF tank and dosing module, SCR catalyst on equipped builds; EGR cooler service.
- 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 / 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 inspection and replacement, rollers, idlers, drive sprockets, recoil springs.
- Swing system: Swing motor and reduction gear service, swing bearing inspection, swing brake.
- Electrical / ECU: Engine ECU, instrument cluster, sensors, harness, telematics module on equipped units.
- Cab glass + wiper: Cab glass and wiper service items — 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 CX350C
| Category | Common Parts | Browse |
|---|---|---|
| Engine | Tier 4 Interim diesel internals, gaskets, bearings | 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 CX350C Excavator?
Common-rail injectors, hydraulic main pumps, and swing components are the highest-value items on a CX350C. Call our parts team with your serial number and we’ll match the right component to your machine.
Request a PartWhat to verify before ordering
- Serial number. Confirm the machine serial on the CX350C before ordering year-specific parts.
- Engine serial. Engine internal parts must match the engine serial number.
- Hydraulic cylinder bore. Cylinder seal kit fit depends on 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.
Why the CX350C still earns a paycheck
The Case CX350C is a 35-ton class production excavator suited to general site work, utility installation, residential and commercial earthmoving, and mining and quarry work depending on configuration. The C-Series platform is well-supported by the dealer network and aftermarket parts supply, and the conventional tail swing layout, steel-track undercarriage, and common-rail diesel are all well-understood by service techs.
Maintenance priorities on a CX350C: clean fuel and tight water separation for common-rail injection, DPF regen behavior tracking, hydraulic oil condition, swing-bearing lubrication, steel-track tension and undercarriage wear monitoring, and pin / bushing service. Broken Tractor maintains parts coverage across the Case excavator family.
