Repair & Remanufacturing: Hydraulic Motors

Complimentary Consultation

Repair & Remanufacturing: Hydraulic Motors

We remanufacture axial piston, orbital (gerotor/geroller), gear and radial piston hydraulic motors of leading global brands. Full diagnostics, mechanical reconditioning and dynamic bench testing on our proprietary test facilities.

Hydraulic Motor Operating Principles

A hydraulic motor converts the hydraulic energy of pressurized fluid flow back into mechanical rotary torque at the output shaft.

How It Works: Pressurized fluid enters sealed chambers and acts upon pistons, vanes or gear teeth driving output shaft rotation. The higher the differential pressure across the ports, the higher the output torque produced.

Hydraulic Motors Serviced

Motor Architecture

Leading Manufacturers

Operating Envelope

Axial Piston Motors

Bosch Rexroth, Parker, Danfoss, Sauer, Kawasaki, Linde

Operating pressure up to 500 bar, power output up to 500 kW

Gear Motors

Bosch Rexroth, Parker, Casappa, Hydac

Fluid throughput up to 300 L/min

Radial Piston Motors

Hägglunds, Poclain, SAI

Output torque up to 50,000 N·m

Orbital / Gerotor / Geroller Motors

Danfoss, Eaton, Parker, Char-Lynn

Displacements up to 800 cm³/rev

This is not an exhaustive list. We repair hydraulic motors from the following brands:

We repair hydraulic motors for drilling rigs, metallurgical equipment, conveyors, and heavy machinery

Remanufactured Using Genuine Components

Official Service Partner. Supply of genuine OEM spare parts (cylinder blocks, piston groups/assemblies, valve plates/port plates).

We utilize high-efficiency filtration during line flushing and bench testing to guarantee hydraulic fluid cleanliness.

Dedicated industrial filters and replacement filter elements integrated into our test rig circuits.
Thanks to our status as an official service partner, we have direct access to genuine Bosch Rexroth spare parts and factory technical documentation, ensuring that all repairs comply with strict OEM quality standards.

What Can Hydraulic Motor Repair Include? Full Scope of Work

01 Diagnostics and Defect Analysis

Visual inspection and initial cleaning of the assembly
Geometric verification of the housing, drive shaft, and valve plates (port plates)
Measurement of clearances and end-play/backlash (bearings, piston group)
Test bench evaluation to detect latent defects

02 Disassembly and Cleaning

03 Machining and Component Restoration

Drive shaft reconditioning (weld cladding of worn journals, splines, and bearing seats, followed by finish turning and cylindrical grinding)
Housing line boring (restoring the bore geometry of bearing seats and seal cavities)
Bushing fabrication (bronze/steel bush pairs turned to custom tolerances as needed)
Valve plate / port plate reconditioning (precision grinding and optical lapping)
Cylinder barrel honing (for piston-type hydraulic motors)
Custom hardware fabrication (CNC machining of pins, drive keys, and other custom components)

04 Component Replacement

Bearings (rolling element and plain/sleeve bearings)
Bushings (bronze, bi-metal, steel)
Valve plates / port plates (in case of excessive wear)
Splined sleeves and couplings
Oil seals and seal kits (radial shaft seals, U-cups, O-rings, gaskets)
Drive shafts (if reconditioning is not feasible)
Piston groups / rotary assemblies (cylinder block, pistons, return springs)
Gear sets (for external gear motors)

05 Assembly and Calibration

06 Test Bench Validation

Dynamic break-in run under variable load
Measurement of operating pressure, flow consumption, and fluid temperature
Inspection for external/case-drain leakage and abnormal noise/vibration
Issuance of a test certificate (equipment data sheet) with actual measured performance parameters

Frequently Asked Questions

How quickly do you repair hydraulic motors?

Turnaround time starts from 5 business days, depending on defect complexity and spare parts availability.

What documentation is provided after the repair?

Turnaround time starts from 5 business days, depending on defect complexity and spare parts availability.

Do you provide a warranty on repairs?

Turnaround time starts from 5 business days, depending on defect complexity and spare parts availability.

What if the motor is discontinued and parts are no longer available?

Turnaround time starts from 5 business days, depending on defect complexity and spare parts availability.

Request Your Hydraulic Motor Repair Now

Attach a photo of the unit, its nameplate, or describe the malfunction. Our technical specialist will get in touch to clarify project details and provide a repair cost estimate.