TH0475MS320AAAB Parker TH Heavy Duty Orbit Motor

Product Overview

The TH0335, TH0405, TH0475, TH0530, TH0625, TH0785 and TH0960 belong to the Parker Hannifin TH Series Torqmotor™ LSHT hydraulic motor family.

Parker positions the TH Series as a heavy-duty, high-side-load motor platform. Its design combines a heavy-duty drive link, roller-vane rotor technology and a sealed commutator. Parker specifies a 60:40 spline-geometry drive link capable of transmitting more than 13,000 lb-in of torque, while the 1-1/2-inch output shaft is designed for up to 7,000 lb of radial load. The internal powertrain is continuously washed and lubricated by working fluid for cooling and durability.

The TH Series covers 141–959 cm³/rev, including the displacement codes in the supplied product title:

• TH0335 — 337 cm³/rev / 20.6 in³/rev
• TH0405 — 405 cm³/rev / 24.7 in³/rev
• TH0475 — 477 cm³/rev / 29.1 in³/rev
• TH0530 — 528 cm³/rev / 32.3 in³/rev
• TH0625 — 623 cm³/rev / 38.0 in³/rev
• TH0785 — 786 cm³/rev / 48.0 in³/rev
• TH0960 — 959 cm³/rev / 58.5 in³/rev.

For aftermarket supply, the correct terminology is Parker TH replacement / compatible replacement / interchangeable replacement motor. Direct interchangeability should be verified by matching mounting, ports, shaft geometry, rotation, displacement and installation dimensions rather than relying on the displacement code alone. Parker’s ordering system explicitly combines series, displacement, mounting/ports, shaft, rotation and option codes.

Technical Specifications

TH0335

• Series: Parker TH0335
• Geometric displacement: 337 cm³/rev / 20.6 in³/rev
• Maximum speed: 277 rpm
• Maximum continuous flow: 76 L/min / 20 GPM
• Maximum intermittent flow: 95 L/min / 25 GPM
• Maximum continuous differential pressure: 207 bar / 3000 psi
• Maximum intermittent differential pressure: 276 bar / 4000 psi
• Maximum supply pressure: 300 bar / 4350 psi
• Maximum output power: 31 kW / 41 HP
• Maximum continuous/intermittent torque: 964 / 1297 N·m
• Minimum continuous/intermittent starting torque: 843 / 1117 N·m.

TH0405

• Series: Parker TH0405
• Geometric displacement: 405 cm³/rev / 24.7 in³/rev
• Maximum speed: 232 rpm
• Maximum continuous flow: 76 L/min / 20 GPM
• Maximum intermittent flow: 95 L/min / 25 GPM
• Maximum continuous differential pressure: 172 bar / 2500 psi
• Maximum intermittent differential pressure: 241 bar / 3500 psi
• Maximum supply pressure: 300 bar / 4350 psi
• Maximum output power: 27 kW / 37 HP
• Maximum continuous/intermittent torque: 942 / 1342 N·m
• Minimum continuous/intermittent starting torque: 791 / 1145 N·m.

TH0475

• Series: Parker TH0475
• Geometric displacement: 477 cm³/rev / 29.1 in³/rev
• Maximum speed: 237 rpm
• Maximum continuous flow: 76 L/min / 20 GPM
• Maximum intermittent flow: 114 L/min / 30 GPM
• Maximum continuous differential pressure: 138 bar / 2000 psi
• Maximum intermittent differential pressure: 207 bar / 3000 psi
• Maximum supply pressure: 300 bar / 4350 psi
• Maximum output power: 28 kW / 38 HP
• Maximum continuous/intermittent torque: 887 / 1372 N·m
• Minimum continuous/intermittent starting torque: 740 / 1120 N·m.

TH0530

• Series: Parker TH0530
• Geometric displacement: 528 cm³/rev / 32.3 in³/rev
• Maximum speed: 213 rpm
• Maximum continuous flow: 76 L/min / 20 GPM
• Maximum intermittent flow: 114 L/min / 30 GPM
• Maximum continuous differential pressure: 138 bar / 2000 psi
• Maximum intermittent differential pressure: 172 bar / 2500 psi
• Maximum supply pressure: 300 bar / 4350 psi
• Maximum output power: 23 kW / 31 HP
• Maximum continuous/intermittent torque: 983 / 1253 N·m
• Minimum continuous/intermittent starting torque: 874 / 1091 N·m.

TH0625

• Series: Parker TH0625
• Geometric displacement: 623 cm³/rev / 38.0 in³/rev
• Maximum speed: 182 rpm
• Maximum continuous flow: 76 L/min / 20 GPM
• Maximum intermittent flow: 114 L/min / 30 GPM
• Maximum continuous differential pressure: 121 bar / 1750 psi
• Maximum intermittent differential pressure: 155 bar / 2250 psi
• Maximum supply pressure: 300 bar / 4350 psi
• Maximum output power: 20 kW / 27 HP
• Maximum continuous/intermittent torque: 986 / 1291 N·m
• Minimum continuous/intermittent starting torque: 895 / 1165 N·m.

TH0785

• Series: Parker TH0785
• Geometric displacement: 786 cm³/rev / 48.0 in³/rev
• Maximum speed: 143 rpm
• Maximum continuous flow: 76 L/min / 20 GPM
• Maximum intermittent flow: 114 L/min / 30 GPM
• Maximum continuous differential pressure: 103 bar / 1500 psi
• Maximum intermittent differential pressure: 138 bar / 2000 psi
• Maximum supply pressure: 300 bar / 4350 psi
• Maximum output power: 17 kW / 23 HP
• Maximum continuous/intermittent torque: 1044 / 1428 N·m.

The parsed Parker PDF places some TH0785 starting-torque text ambiguously relative to adjacent rows, so the minimum starting-torque value for TH0785 is intentionally omitted here rather than presenting an unverified number.

TH0960

• Series: Parker TH0960
• Geometric displacement: 959 cm³/rev / 58.5 in³/rev
• Maximum speed: 118 rpm
• Maximum continuous flow: 76 L/min / 20 GPM
• Maximum intermittent flow: 114 L/min / 30 GPM
• Maximum continuous differential pressure: 69 bar / 1000 psi
• Maximum intermittent differential pressure: 103 bar / 1500 psi
• Maximum supply pressure: 300 bar / 4350 psi
• Maximum output power: 12 kW / 16 HP
• Maximum continuous/intermittent torque: 773 / 1268 N·m.

Specific Configuration: TH0475MS320AAAB

Parker’s official ordering information allows the following code interpretation:

• TH — TH Series
• 0475 — 477 cm³/rev / 29.1 in³/rev
• MS — Magneto mounting, 7/8-14 SAE O-ring ports
• 32 — 1-1/2-inch keyed shaft
• 0 — Standard rotation
• AAAB — Standard / No Paint
• Maximum speed: 237 rpm
• Maximum continuous/intermittent flow: 76 / 114 L/min
• Maximum continuous/intermittent differential pressure: 138 / 207 bar
• Maximum supply pressure: 300 bar
• Maximum continuous/intermittent torque: 887 / 1372 N·m
• Maximum power: 28 kW / 38 HP
• Parker’s TH heavy-duty design specifies maximum side-load capability at the key of 21,360 N / 4,800 lb.

Parker’s published dimensional information gives the MS TH0475 approximately 17.6 kg / 38.7 lb and approximately 254.0 mm / 10.00 in overall length.

Specific Configuration: TH0405MB311AAAB

• Full model: TH0405MB311AAAB
• Series: TH
• Displacement code: 0405 = 405 cm³/rev / 24.7 in³/rev
• Shaft code: 31 = 1-1/2-inch J501 tapered shaft
• Rotation code: 1 = Reverse Timed Manifold
• Option code: AAAB = Standard / No Paint
• Maximum speed for TH0405: 232 rpm
• Maximum continuous/intermittent flow: 76 / 95 L/min
• Maximum continuous/intermittent differential pressure: 172 / 241 bar
• Maximum supply pressure: 300 bar
• Maximum continuous/intermittent torque: 942 / 1342 N·m
• Maximum power: 27 kW / 37 HP.

The MB mounting/port code is not independently defined in the current public Parker TH standard catalog used for this verification. For that reason, the exact MB interface should be confirmed against the original nameplate, historical Parker drawing or original order documentation rather than being assigned an unsupported port or mounting description. The complete part number itself is present in external product records, but those records do not replace Parker’s official configuration documentation.

Control Configuration

• Motor type: Fixed-displacement LSHT orbital hydraulic motor
• Displacement control: Fixed displacement
• Speed control: Hydraulic flow control
• Direction control: Hydraulic A/B port pressure
• Parker’s service documentation specifies B-port pressure for clockwise rotation and A-port pressure for counter-clockwise rotation, viewed from the output-shaft end.
• Rotation codes are used to define standard versus reverse/timed-manifold configurations.

Key Technical Advantages

1. Heavy-Duty 60:40 Drive Link

The TH Series uses Parker’s 60:40 spline-geometry drive link, designed for high torque transmission. Parker states that the drive link can transmit more than 13,000 lb-in of torque, making the architecture particularly suitable for heavy-duty hydraulic drives.

2. High Side-Load Capability

Parker specifically describes the TH as a heavy-duty, high-side-load motor. The documented 1-1/2-inch output-shaft architecture supports up to 7,000 lb radial load, with a specified maximum side load at the key of 4,800 lb / 21,360 N. This makes the TH platform relevant to wheel drives, chain drives, belt-driven systems and other applications with substantial external radial loading.

3. Roller-Vane Rotor and Sealed Commutator

Parker uses roller-vane rotor technology together with a sealed commutator. These features are intended to reduce friction, maintain stable hydraulic commutation and support smooth low-speed operation.

4. Continuous Working-Fluid Cooling and Lubrication

The TH powertrain is continuously washed by working fluid, helping lubricate and cool the internal spline and shaft-seal areas. Parker identifies this as a durability feature for demanding operating conditions.

5. Broad Displacement Range

With displacements from 141 to 959 cm³/rev, the TH family allows engineers to select motor displacement according to required output speed, hydraulic flow and torque while retaining the same heavy-duty motor architecture.

6. Multiple Mechanical Configurations

Parker provides multiple mounting, porting, shaft and rotation configurations, including magneto, wheel and SAE mounting systems and keyed, spline and J501 tapered shaft arrangements. This is important for replacement engineering where the mechanical installation interface must be retained.

Application Areas

Typical applications for TH Series heavy-duty hydraulic motors include:

• Road construction equipment
• Asphalt paving machinery
• Agricultural machinery
• Heavy-duty mobile equipment
• Material-handling equipment
• Wheel-driven machines
• Conveyor drives
• Industrial sweepers
• Winch and drum drives
• Rotary equipment
• Chain-driven hydraulic systems
• Forestry machinery
• Heavy-duty auxiliary drives

The TH platform is specifically positioned by Parker for tough, heavy-duty and high-side-load applications, making heavy mobile and industrial drive systems the most technically appropriate positioning.

Expert Maintenance Tips

Filtration and Contamination Control

Parker service guidance recommends approximately 40–50 micron filtration. For a large-displacement LSHT motor, contamination can accelerate wear in the rotor set, commutator, drive link and sealing components.

Hydraulic-Fluid Viscosity

The Parker service documentation specifies a minimum hydraulic-fluid viscosity of 50 SSU. Actual fluid selection should also comply with the machine manufacturer’s fluid specification and operating-temperature range.

Oil Temperature

The Parker service documentation specifies a maximum operating oil temperature of approximately 200°F / 93.3°C. Excessive temperature can accelerate seal degradation and increase internal leakage.

Do Not Mix Incompatible Hydraulic Fluids

When changing hydraulic fluid, verify compatibility between the existing and replacement fluids. System flushing may be required where oil types are changed.

Manage External Radial Loads

Although the TH platform is designed for high side loads, the published load capacity should not be interpreted as permission for unrestricted overhung loading. Chain sprockets, pulleys, hubs and other driven components should be aligned correctly and positioned to keep actual shaft/bearing loading within the manufacturer’s limits.

Replace Removed Seals During Service

During overhaul, removed O-rings, seal rings and shaft seals should not simply be cleaned and reused. Appropriate Parker/OEM-approved replacement sealing components should be used.

Perform Test-Stand Verification

Parker service guidance recommends test-stand verification when available after motor service. This aligns naturally with a replacement manufacturer’s 100% simulated working-condition testing process, allowing functional verification rather than relying solely on dimensional inspection.

Verify the Complete Part Number

For TH0475MS320AAAB and TH0405MB311AAAB, never select a replacement solely from the TH0475 or TH0405 displacement code.

Always verify:

• Displacement
• Mounting code
• Porting
• Shaft code
• Rotation code
• Option code
• Shaft geometry
• Port orientation
• Installation dimensions
• Maximum differential pressure
• Required flow range

For TH0405MB311AAAB, the MB interface designation should receive additional nameplate/order verification because its detailed definition is not included in the current public Parker standard TH catalog.