Used Case Hydraulics

Case hydraulic system: one circuit, key components

On a Case excavator, one or more variable displacement pumps supply the valve block, which directs oil to the equipment cylinders, the swing motor, and through the rotary joint, to the travel motors. On a 580 backhoe loader, a single pump serves the loader, the rear excavator, and the steering. Each component depends on the others: a worn pump overheats the oil, a leaking rotary joint causes loss of travel on one side. Your model's hydraulic diagram, found in the service manual, locates each component and its connections.

Case hydraulic pump and components in stock

• Valve blocks: main control valves and solenoid valves.
• Pumps: main pumps, auxiliary pumps, swing and travel pumps.
• Motors: swing motors, travel motors, and gear motors.
• Travel: travel and swing gear motors.
• Peripherals: rotary joints and oil coolers.

Case CX, WX, and 88 series excavators supported

Our stock covers Case tracked excavators from the CX75SR to the CX330, including CX135SR, CX210, CX210B, CX225SR, CX240, and CX290, as well as the wheeled WX145 to WX210 models. It also includes the 88 series from Poclain: 688, 788, 888, 1088, 1188 and 1288, in both wheeled and tracked versions, along with the 9007 and 9046. For loaders and backhoe loaders, we have models 121D, 221E and 721D, plus backhoe loaders 580G, 580SK and 580SLE.

How to identify a Case hydraulic part

• Machine: model, version (P, PB, SR, LC), and serial number.
• Reference: marked on the part's plate, either Case or original manufacturer.
• Specifications: cylinder size of a pump or motor, number of valve sections.
• Connections: number, position, and diameter of ports.
• Photos of the part, its plate, and ports.

Case hydraulic cylinder seal: repair or replace

A leak at the rod seal of a Case boom or dipper arm cylinder does not always require replacing the entire cylinder. If the rod is straight and smooth, your mechanic can replace the seal kit. If the rod is scored, the guide worn, or the leak recurs after repair, it's better to replace the whole unit. Our used Case cylinders are categorized by function and original machine, with measurements. An original cylinder maintains the mountings and stroke specified for your excavator or backhoe loader.

Case hydraulic oil and filter after a failure

• Oil change: a broken pump or motor sends debris throughout the circuit, so hydraulic oil must be replaced.
• Hydraulic filters: replace the return and pilot filters before restarting.
• Flushing: if the oil contains metal particles, flush the circuit and clean the tank.
• Oil cooler and hoses: inspect as they often trap debris.
• Rotary joint: on an excavator, a worn joint causes internal leaks affecting travel.
• Recommended oil: use the grade specified in your Case machine manual.

Case and Poclain: legacy of the 88 series

At the end of the 1970s, Case took control of the French manufacturer Poclain, a pioneer of the hydraulic excavator. The 88 series excavators, produced later under both brands, share most of their hydraulic components. For these still common machines on construction sites, a used pump, valve block or rotary joint is often the only quick solution. Before shipment, our technicians verify the reference marked on the component against your machine's serial number.

Codimatra, your Case hydraulic stock

• Over 40 years dismantling public works machines.
• Approximately 17,000 references in stock, plus our all-makes hydraulic range.
• Workshop-tested: shaft rotation, no leaks, condition of mating surfaces and ports.
• Expert advice from specialists based on your serial number.
• Shipping from Castelculier, near Agen. Quotes at 05 53 96 16 43.