Case CX37C Mini Excavator: C-Series 3.7-Ton Compact Excavator
The Case CX37C is a 3.7-ton C-Series mini excavator built for utility, landscape, and contractor work at the upper end of the small-mini class. Tier 4 Final compact diesel, hydrostatic dual-path drive, and rubber-track undercarriage make it a tight-quarters production machine.
Where the CX37C fits in the Case excavator line
The CX37C is a 3.7-ton class C-Series mini excavator sized for utility, landscape, and contractor work at the upper end of the small-mini class. It sits in the compact end of the Case excavator family alongside other C-Series mini machines, with rubber-track flotation and a footprint that fits jobs where a larger tracked excavator won’t.
Case CX37C Mini Excavator - Quick Specs
- Class
- 3.7-Ton Mini Excavator
- Generation
- C-Series
- Engine
- Tier 4 Final Compact Diesel
- Aftertreatment
- DPF + SCR (DEF)
- Drivetrain
- Hydrostatic Dual-Path
- Undercarriage
- Rubber Track
- Serial Plate
- RH lower cab frame, below windshield
Engine, hydraulics, and drivetrain
The CX37C runs a small Tier 4 Final compact diesel into a hydrostatic dual-path drivetrain with a rubber-track undercarriage. Boom, dipper, bucket, swing, and propel functions run from a single-section main hydraulic pump with electrohydraulic or mechanical control depending on configuration.
Common-rail injection on the Tier 4 Final engine demands clean fuel and tight water separation. Aftertreatment includes a diesel particulate filter (DPF) with periodic regeneration and a selective catalytic reduction (SCR) catalyst with DEF dosing for NOx control. EGR cooling rounds out the emissions package.
Common service items on the CX37C
- Engine internals: Compact Tier 4 Final diesel pistons, rings, sleeves, head gaskets, common-rail injection components.
- Tier 4 Final aftertreatment: DPF service intervals and regeneration behavior, DEF tank and dosing module, SCR catalyst, 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 on turbo builds, 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: Rubber 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 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 CX37C
| Category | Common Parts | Browse |
|---|---|---|
| Engine | Tier 4 Final diesel internals, pistons, rings, sleeves, gaskets | Browse Engine |
| Aftertreatment | DPF, DEF dosing, SCR, EGR cooler components | Browse Aftertreatment |
| Fuel System | Common-rail injectors, lift pump, filters, water separator | Browse Fuel |
| Cooling | Radiator, water pump, charge-air cooler, hoses, belts | Browse Cooling |
| Hydraulics | Main pump, swing motor, cylinders, seal kits, control valves | Browse Hydraulics |
| Boom / Dipper | Pins, bushings, bucket and quick-coupler hardware | Browse Boom / Dipper |
| Undercarriage | Rubber tracks, rollers, idlers, sprockets, recoil springs | Browse Undercarriage |
| Swing | Swing motor, reduction gear, swing bearing, swing brake | Browse Swing |
| Cab Glass / Wiper | KHN16820 wiper, KHN3046 lower glass, KHN2632 upper glass (Case/Link-Belt cross-fit) | Browse Cab Glass |
| Electrical / ECU | ECU, sensors, harness, instrument cluster, telematics | Browse Electrical |
| Operator Station | Seat, joysticks, pedal linkage, gauges, HVAC | Browse Operator Station |
Need a part for your Case CX37C Mini Excavator?
Tier 4 Final aftertreatment, common-rail injection components, and rubber-track undercarriage parts are the highest-frequency service items on a CX37C. Call our parts team with your serial number.
Request a PartWhat to verify before ordering
- Machine serial number. Confirm the serial on the CX37C before ordering year-specific parts - the C-Series saw running revisions through production.
- 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 CX37C still earns a paycheck
The Case CX37C is sized for compact-excavator duty cycles where a 3.7-ton machine is the right tool - residential landscape, utility, irrigation, plumbing, and any tight-quarters digging where larger excavators won’t fit. Modern Tier 4 Final emissions compliance, compact footprint, and rubber-track flotation suit residential and contractor work where a wheeled or larger tracked machine would mark up turf or fail to fit.
Maintenance priorities on a CX37C: clean fuel and tight water separation for common-rail injection, DPF regen behavior tracking, hydraulic oil at temperature with clean filtration, rubber-track tension and wear monitoring, and pin and bushing service at every working joint. Broken Tractor maintains parts coverage across the Case mini excavator family.
