Case CX290B Hydraulic Excavator: 29-Ton B-Series Production Excavator
The Case CX290B is the B-Series, 29-ton class hydraulic excavator in Case’s full-size excavator lineup. It carried refined load-sensing hydraulics, an upgraded operator cab, and electrohydraulic control over the prior CX290, positioning it between the original CX290 and the later CX290D in the family.
Where the CX290B fits in the Case excavator line
The CX290B is a 29-ton class B-Series excavator. It sits between the original CX290 and the later CX290D in Case’s full-size excavator lineup. The B-Series brought refined load-sensing hydraulics, an updated electrohydraulic control system, and a modernized cab to the 29-ton platform.
Case CX290B Excavator - Quick Specs
- Class
- 29-Ton Excavator
- Generation
- B-Series
- Engine
- Tier 3 Diesel
- Drivetrain
- Hydrostatic Dual-Path
- Undercarriage
- Steel-Track
- Tail Swing
- Conventional
- Predecessor
- Case CX290
- Successor
- Case CX290D
Engine, hydraulics, and drivetrain
The CX290B runs a Tier 3 diesel 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 functions through electrohydraulic control valves. The B-Series control system gave the operator smoother modulation and better simultaneous-function performance than the original CX290.
The swing system uses a dedicated swing motor and reduction gear riding on a swing bearing with internal ring gear. The undercarriage is the proven steel-track sealed-and-lubricated chain with planetary final drives, rollers, idlers, and recoil tensioners standard across the B-Series 29-ton class.
Common service items on the CX290B
- Engine internals: Pistons, rings, sleeves, head gaskets, bearings on the Tier 3 diesel.
- 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 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 wipers: 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 CX290B
| Category | Common Parts | Browse |
|---|---|---|
| Engine | Tier 3 diesel internals - pistons, rings, sleeves, gaskets | Browse Engine |
| Fuel System | Common-rail injectors, lift pump, filters | Browse Fuel System |
| 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, instrument cluster | Browse Electrical |
| Operator Station | Seat, joysticks, pedal linkage, gauges | Browse Operator Station |
Need a part for your Case CX290B Excavator?
Hydraulic components, common-rail fuel system parts, and undercarriage are the highest-value items on a CX290B. Call our parts team with your serial number.
Request a PartWhat to verify before ordering
- Machine serial number. Confirm the serial on the CX290B 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.
- Emissions revision. Tier 3 fuel system and ECU 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 CX290B still earns a paycheck
The Case CX290B is a 29-ton class production excavator - well-suited to general site work, utility installation, residential and commercial earthmoving, and mining or quarry work depending on configuration. The B-Series hydraulics and cab refinements gave operators a meaningful productivity step over the original CX290 while keeping the platform serviceable in the field.
Maintenance priorities on a CX290B: clean fuel and tight water separation for common-rail injection, hydraulic oil condition and filtration, swing-bearing lubrication, steel-track tension and undercarriage wear monitoring, and pin and bushing service at the boom and dipper joints. Broken Tractor maintains parts coverage across the Case excavator family, including B-Series specific components.
