White Drive / White Drive Motors & Steering Orbital Motors and Steering Units

Catalog of orbital hydraulic motors, Roller Stator geroller units, and hydrostatic steering solutions by White Drive / White Drive Motors & Steering from SpareX.

White Drive OMP and OMR Orbital Hydraulic Motors

The OMP and OMR orbital hydraulic motors feature displacements from 25 to 400 cm3 and continuous pressure up to 200 bar for agricultural and construction machinery. Delivering smooth torque up to 580 Nm, these spool valve drives ensure long service life in heavy conveyor and auger drives.

Versatile orbital hydraulic motors with displacement ranging from 25 to 400 cm3
Mobile drives for agricultural combines, industrial conveyors and sweepers
Continuous working pressure up to 200 bar and output torque rating up to 580 Nm
Spool valve distribution, high pressure shaft seals and standard 2-bolt mounts

White Drive RE, RC and CE Heavy-Duty Hydraulic Motors

The RE, RC and CE series propel hydraulic motors deliver displacements from 120 to 750 cm3 and torque up to 1100 Nm for aerial work platforms and mobile equipment. Featuring patented Roller Stator technology and pressure balance plates, they provide high starting efficiency and long life.

Heavy-duty orbital propel motors with displacement ranging from 120 to 750 cm3
Propel drives for aerial work platforms, drilling rigs and mobile forestry units
Continuous pressure drop rating up to 207 bar and maximum torque up to 1100 Nm
Patented Roller Stator geroller assembly, balance plate and high load bearings

White Drive RS High-Efficiency Hydraulic Motors

The RS hydraulic motor series provides displacement from 50 to 400 cm3 with Roller Stator geometry for dependable operation in demanding cycles. Forced drive link lubrication reduces internal friction and extends component lifespan under continuous pressures up to 121 bar and torque to 377 Nm.

Efficient geroller hydraulic motors with displacement options from 50 to 400 cm3
Propel and auxiliary drives for street sweepers, shredders and feed mixers
Maximum continuous pressure drop up to 121 bar and continuous torque of 377 Nm
Forced drive link lubrication system, spool valve design and 2-bolt mounts

White Drive WS 350 High-Torque Hydraulic Motors

The WS 350 hydraulic motor series offers displacements from 80 to 500 cm3 engineered for skid steer loader attachments and agricultural machines. Delivering continuous torque up to 850 Nm at working pressures up to 207 bar, these units deliver steady rotation under demanding mechanical loads.

High-torque orbital hydraulic motors with displacement from 80 to 500 cm3
Skid steer attachments, trenchers, agricultural augers and stump grinders
Continuous pressure drop rating up to 207 bar and peak torque rating 850 Nm
Side port and end port manifold options with heavy duty drive shaft options

White Drive OSPM Mini Hydraulic Steering Units

The OSPM mini hydrostatic steering unit provides displacements from 32 to 100 cm3 for compact mobile machinery. Operating at pressures up to 150 bar and flows up to 20 lpm, it ensures light steering effort, minimal internal leakage, and low acoustic levels in tight utility vehicle platforms.

Compact hydrostatic steering units with displacement options from 32 to 100 cm3
Steering systems for garden tractors, compact forklifts and airport tow vehicles
Maximum steering hydraulic pressure up to 150 bar with system flow up to 20 lpm
Corrosion resistant C3 coating, integrated check valves and steering columns

White Drive LAGC Heavy-Duty Hydraulic Steering Units

The LAGC hydraulic steering unit series offers displacements from 40 to 630 cm3 for medium and heavy mobile equipment. Supporting operating pressures up to 210 bar and flows up to 80 lpm, these units integrate emergency steering manual modes and relief valves for demanding field conditions.

Heavy-duty hydrostatic steering units with displacements from 40 to 630 cm3
Steering circuits for agricultural tractors, wheel loaders and motor graders
Working hydraulic pressure up to 210 bar and continuous flow rate to 80 lpm
Integrated shock valves, anti-cavitation valves and replacement seal repair kits

Hydraulic Motor Distribution Architecture and Roller Stator Design

White Drive orbital motors utilize two distinct hydraulic distribution methods: spool valve arrangements (RS, OMP, OMR) and disc valve configurations (RE, RC, CE, WS).

Spool valve units integrate the valving onto the output shaft, delivering compact dimensions and stable mechanical efficiency for low to medium flow installations.

Disc valve designs incorporate hydraulically balanced wear plates that reduce surface friction under heavy working pressures up to 207 bar.

The patented Roller Stator geroller assembly replaces fixed teeth with precision ground rollers, minimizing contact friction, maintaining volumetric efficiency, and ensuring smooth low-speed starting under heavy mechanical torque loads.

Wear Inspection and Diagnostic Tolerances for Orbital Motors

Systematic overhaul of White Drive hydraulic motors requires precision inspection of the Roller Stator geroller set, valve disc, and drive link assembly. Primary evaluation metrics include radial play between rollers and rotor lobes, planarity of geroller housing faces, and spline tooth backlash.

Surface scoring on the disc valve or abrasive erosion across the balance plate creates internal fluid bypass into the motor case drain, triggering torque decay.

Technicians examine housing contact faces for stepping wear and inspect the drive link shaft for angular twist or fatigue cracking along splined engagement zones under peak mechanical operating loads.

Industrial Performance Verification and Test Bench Procedures

When evaluating orbital motor assemblies, comprehensive quality verification is performed on calibrated hydraulic test benches.

Testing protocols encompass measuring case leakage bypass flow rates, mechanical efficiency across operating speeds, minimum break-away starting pressure, and running stability under mechanical load.

Documented performance curves confirm full compliance with technical specifications prior to delivery. SpareX supplies industrial hydraulic motors with documented verification records and global logistics support for mobile machine builders and plant maintainers worldwide.

Hydrostatic Steering Unit Calibration and Relief Valve Verification

White Drive OSPM and LAGC hydrostatic steering control units incorporate integral safety valve manifolds requiring regular pressure verification on test rigs. The circuit includes a main inlet relief valve, suction check valves, and dual cylinder shock valves.

Calibration confirms correct opening pressure for shock valves protecting steering cylinders from external mechanical impacts.

Additionally, engineers measure neutral-circuit internal leakage and verify spool sleeve rotational torque to ensure effortless, jam-free operator steering without thermal binding during continuous duty cycles.

Fluid Contamination Standards and Case Drain Protection Guidelines

Reliable long-term operation of White Drive motors and steering assemblies depends upon oil cleanliness and proper case drain plumbing. Filtration must maintain fluid cleanliness to ISO 4406 standards of 18/16/13 using 10-micron absolute filtration media.

Elevated case pressure causes premature failure of high-pressure shaft seals; consequently, external case drain lines must route unrestricted directly into the hydraulic reservoir below minimum fluid level.

Operating on aerated or moisture-contaminated oil accelerates cavitation wear across precision-machined Roller Stator contact surfaces.

Interchangeability and Selection Guidelines for Mobile Equipment

Selecting equivalent White Drive replacements for legacy Danfoss, Eaton Char-Lynn, or Parker units involves matching geometric displacement, mounting flange geometry, and output shaft profile.

For light to medium duty applications, OMP and OMR series provide standard SAE 2-bolt mounts and G 1/2 ports for drop-in field replacement.

In high-radial-load propulsion drives, heavy-duty RE and WS series feature tapered or multi-spline shafts with heavy duty bearings designed to absorb chain tension and side loads without rotor tilting or uneven geroller edge loading.

White Drive / White Drive Motors & Steering and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of White Drive / White Drive Motors & Steering and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.