Spare Parts

Hydraulic Spare Parts for Repair and Overhaul

A complete hydraulic unit does not always need to be replaced when a failure occurs. In many applications, individual hydraulic spare parts can be used to rebuild a pump, motor, valve, gearbox or cylinder and return the component to service.

HPM Hydraulic supplies a broad range of repair components for construction machinery, mobile hydraulics and industrial equipment. The catalogue covers spare parts for hydraulic pumps, hydraulic motors, valves, gearboxes and cylinders.

What Hydraulic Components Can Be Repaired?

Depending on component design and condition, a hydraulic overhaul may involve replacement of individual internal or mechanical parts rather than the complete assembly.

Available repair components may include:

• drive shafts,
• cylinder blocks and barrels,
• rotating groups,
• valve plates,
• pistons and slippers,
• bearings and races,
• gear sets,
• spools and valve elements,
• flanges and adaptors,
• gearbox components,
• cylinder components.

Repair by Component Number, Not Appearance

Internal hydraulic parts can look nearly identical while having different dimensions, tolerances or operating characteristics. For this reason, visual comparison should only support identification, not replace it.

The most useful information is usually:

• manufacturer name,
• complete component model,
• OEM or spare part number,
• machine make and model,
• serial or production version where applicable.

When Is Repair More Practical Than Complete Replacement?

Component repair may be appropriate when the main housing and other high-value parts remain serviceable and the damaged internal components can be accurately identified.

Before rebuilding a hydraulic unit, the condition of all mating surfaces, bearings, shafts and lubrication or hydraulic circuits should be assessed. Installing one new component into a heavily worn assembly may not provide a reliable repair.

Contamination and Hydraulic Component Failure

Contamination is a major cause of hydraulic wear. Metallic particles, dirt or degraded oil can damage precision surfaces and may affect several internal components at the same time.

After a major pump or motor failure, the hydraulic circuit should be cleaned and filters inspected or replaced before the repaired component is returned to service.

Finding Hydraulic Spare Parts at HPM Hydraulic

The HPM Hydraulic catalogue contains a large number of parts identified by exact technical references. Searching by a complete part number or hydraulic unit designation is usually more effective than using a general machine description.

If the reference is unavailable, provide photographs of the component, identification plate and damaged part together with machine information.

FAQ – Hydraulic Spare Parts

Can a hydraulic pump or motor be repaired instead of replaced?

Yes, depending on the type and extent of wear. Internal parts may be replaceable if the remaining assembly is in serviceable condition.

What information is needed to order an internal hydraulic part?

The full pump, motor, valve or gearbox model and the spare part or OEM number are the most useful identification data.

Should the hydraulic system be flushed after a component failure?

If internal damage has released metallic contamination into the circuit, cleaning the system and inspecting filtration is strongly recommended.

Can similar-looking internal parts be interchangeable?

Not necessarily. Small differences in dimensions, tolerances or design can make visually similar components incompatible.