TH0280US310AAAB Parker Orbital Hydraulic Motor

Product Overview

The Parker Torqmotor™ TH, TK and TL Series are LSHT orbital hydraulic motors engineered for applications requiring high starting torque, stable low-speed rotation and reliable long-term hydraulic power transmission.

The product configurations covered here are:

• TH0280US310AAAB
• TK0630K5640AAAB
• TL0170US031AAAA

These are not simply different-displacement versions of one identical frame. They belong to three distinct Parker Torqmotor platforms with different mounting, shaft and performance characteristics. Parker’s catalog structure identifies each motor through its complete ordering code, including displacement, mounting, ports, shaft, rotation and options.

The TH0280 provides a geometric displacement of 280 cm³/rev, with a maximum continuous differential pressure of 207 bar, intermittent differential pressure of 276 bar, maximum speed of 334 rpm, and maximum continuous/intermittent torque of 796/1073 Nm.

The larger TK0630 provides 630 cm³/rev, with 207/224 bar continuous/intermittent differential pressure and 1617/1716 Nm maximum continuous/intermittent torque.

The compact TL0170 provides 169 cm³/rev displacement and a maximum speed of 512 rpm, making it suitable for compact LSHT hydraulic drive systems.

Parker’s design incorporates roller vanes, sealed commutation, 60:40 spline geometry, high-pressure shaft sealing and heavy-duty bearing arrangements to support efficient, smooth and durable hydraulic motor operation.

For replacement applications, our engineering standard is based on complete configuration matching, dimensional verification and 100% simulated operating-condition testing rather than displacement-only matching.

Technical Specifications

TH0280US310AAAB

• Brand: Parker Hannifin
• Series: Torqmotor™ TH
• Motor Type: LSHT Orbital / Gerotor Hydraulic Motor
• Model: TH0280
• Displacement: 280 cm³/rev
• Displacement: 17.1 in³/rev
• Mounting Code: U
• Mounting: Wheel, Standard
• Ports Code: S
• Ports: 7/8-14 SAE O-Ring
• Shaft Code: 31
• Shaft: 1-1/2″ 17-Tooth, 12/24 Spline
• Rotation Code: 0
• Options Code: AAAB, Standard / No Paint
• Maximum Continuous Differential Pressure: 207 bar / 3,000 psi
• Maximum Intermittent Differential Pressure: 276 bar / 4,000 psi
• Maximum Supply Pressure: 300 bar / 4,350 psi
• Maximum Continuous Flow: 76 L/min / 20 gpm
• Maximum Intermittent Flow: 95 L/min / 25 gpm
• Maximum Speed: 334 rpm
• Maximum Continuous Torque: 796 Nm
• Maximum Intermittent Torque: 1073 Nm
• Maximum Performance: 31 kW / 42 HP
• Maximum Side Load at Key: 21,360 N / 4,800 lb
• Minimum Starting Torque: 675 Nm continuous / 870 Nm intermittent

TK0630K5640AAAB

• Brand: Parker Hannifin
• Series: Torqmotor™ TK
• Motor Type: Heavy-Duty LSHT Orbital / Gerotor Motor
• Model: TK0630
• Displacement: 630 cm³/rev
• Displacement: 38.4 in³/rev
• Mounting Code: K
• Shaft Code: 40
• Maximum Continuous Differential Pressure: 207 bar / 3,000 psi
• Maximum Intermittent Differential Pressure: 224 bar / 3,250 psi
• Maximum Supply Pressure: 241 bar / 3,500 psi
• Maximum Continuous Flow: 114 L/min / 30 gpm
• Maximum Intermittent Flow: 151 L/min / 40 gpm
• Maximum Speed: 237 rpm
• Maximum Continuous Torque: 1617 Nm
• Maximum Intermittent Torque: 1716 Nm
• Maximum Performance: 33.7 kW / 45.2 HP
• Minimum Starting Torque: 1497 Nm continuous / 1621 Nm intermittent
• Maximum Speed at Maximum Intermittent Flow: 328 rpm

TL0170US031AAAA

• Brand: Parker Hannifin
• Series: Torqmotor™ TL
• Motor Type: LSHT Orbital / Gerotor Hydraulic Motor
• Model: TL0170
• Displacement: 169 cm³/rev
• Displacement: 10.3 in³/rev
• Mounting Code: U
• Mounting: Wheel, Standard
• Ports Code: S
• Ports: 7/8-14 SAE O-Ring
• Shaft Code: 31
• Rotation: Standard
• Maximum Continuous Differential Pressure: 190 bar
• Maximum Intermittent Differential Pressure: 241 bar
• Maximum Supply Pressure: 300 bar
• Maximum Continuous Flow: 68 L/min
• Maximum Intermittent Flow: 95 L/min
• Maximum Speed: 512 rpm
• Maximum Continuous Torque: Approximately 449 Nm
• Maximum Intermittent Torque: Approximately 570 Nm

Parker states that the published performance figures are based on testing with SAE 10W40 oil at 200 SUS and 54°C, and actual production-motor performance may vary slightly. These figures therefore should not be interpreted as simultaneous limits for every operating condition.

Key Technical Advantages

1. 60:40 Spline Torque Transmission

The TF/TG/TH/TL Torqmotor architecture incorporates Parker’s 60:40 internal/external spline geometry, providing an optimized torque-transfer path while helping reduce drive-train weight and spline wear.

This is particularly important in high-torque applications where repeated load reversals and mechanical shock can accelerate spline fatigue.

2. Roller Vane and Sealed Commutation

Parker’s engineering documentation identifies roller vanes as a means of reducing friction and internal leakage, while the sealed commutator supports consistent efficiency and smooth low-speed operation.

The result is a more stable output characteristic for low-speed hydraulic drives.

3. High-Pressure Shaft Sealing

The high-pressure shaft seal is engineered to maintain shaft-area sealing integrity and can reduce the need for additional case-drain-related plumbing in suitable applications.

This simplifies hydraulic circuit integration and can improve installation reliability.

4. Heavy-Duty Bearing Arrangement

The Parker Torqmotor platform incorporates heavy-duty thrust and roller bearing arrangements designed to tolerate substantial external shaft loads.

This makes the technology particularly suitable for mechanically coupled drives using:

• Sprockets
• Gears
• Pulleys
• Wheels
• Chain drives

5. Internal Powertrain Cooling and Lubrication

Parker’s TH documentation describes continual flushing of the powertrain spline and shaft-seal areas with working fluid to support cooling, lubrication and reduced spline wear.

6. Platform-Specific Engineering

The three motor families serve different engineering roles:

• TH0280: heavy-duty medium-displacement drive with strong side-load capability;
• TK0630: high-displacement, high-torque heavy-duty drive;
• TL0170: compact LSHT drive with higher allowable speed.

This distinction is important when selecting a replacement motor because equal displacement does not guarantee equal mechanical or hydraulic compatibility.

Application Areas

TH0280US310AAAB

Typical applications include:

• Construction machinery
• Road construction equipment
• Agricultural machinery
• Conveyor systems
• Hydraulic winches
• Augers
• Chain drives
• Forestry equipment
• Material handling machinery
• Mobile hydraulic equipment

TK0630K5640AAAB

Typical applications include:

• Heavy-duty wheel drives
• Forestry machinery
• Large conveyors
• Agricultural equipment
• Heavy winches
• Industrial rotary drives
• Chain and sprocket drives
• Off-road machinery
• Mobile hydraulic equipment

The TK0630’s large 630 cm³/rev displacement and 1617 Nm continuous maximum torque make it particularly suitable for low-speed, heavy-load rotary applications.

TL0170US031AAAA

Typical applications include:

• Compact conveyor drives
• Packaging machinery
• Agricultural equipment
• Small winches
• Professional sweepers
• Textile machinery
• Compact mobile equipment
• Industrial rotary drives

Expert Maintenance Tips

1. Verify the Complete Ordering Code

Do not specify the motor only as TH0280, TK0630 or TL0170.

Always verify the full configuration:

TH0280US310AAAB
TK0630K5640AAAB
TL0170US031AAAA

Mounting, port arrangement, shaft configuration, rotation and option codes can materially affect interchangeability. Parker’s official catalog defines these elements through the ordering-code system.

2. Evaluate External Radial and Axial Loads

For sprocket, gear, belt or wheel drives, evaluate:

• Radial shaft load
• Axial shaft load
• Load position
• Shaft speed
• Bearing life

The TH Series specifies up to 21,360 N side load at the key under the stated catalog conditions, but application-specific bearing calculations are still required.

3. Stay Within the Correct Pressure Rating

The hydraulic circuit should never exceed the pressure capacity of the specific motor configuration. Parker’s service documentation also recommends stopping inspection or service when abnormal wear, impact damage or excessive operating temperature is identified.

4. Control Hydraulic Fluid Temperature and Cleanliness

Parker warns that excessive hydraulic-fluid temperature can cause seals to shrink, harden or crack; the service documentation specifically identifies temperatures above 93.3°C / 200°F as a condition requiring concern.

Recommended maintenance checks include:

• Fluid cleanliness
• Correct viscosity
• Oil temperature
• Filter condition
• Return-line restriction
• Pressure spikes

5. Inspect the Rotor Set and Internal Splines

The following symptoms may indicate rotor-set, drive-link, coupling-shaft or spline wear:

• Reduced output torque
• Excessive internal leakage
• Unstable low-speed operation
• Abnormal noise
• Increased temperature
• Poor starting performance

Parker’s service documentation provides dedicated inspection and replacement procedures for the rotor set, drive link and coupling shaft.

6. 100% Simulated Operating-Condition Testing

For replacement units, our recommended factory QA program includes:

• Rated pressure testing
• Intermittent pressure testing
• Flow testing
• Speed verification
• Rotation-direction testing
• Starting-torque testing
• Continuous-torque verification
• Internal-leakage testing
• Shaft runout inspection
• Radial-load verification
• Temperature-rise testing
• Noise and vibration inspection
• Complete configuration verification

This approach validates functional and dimensional interchangeability, rather than relying only on external dimensions or displacement.

Official Parker references: TH Series HY13-1590-012, TK Series HY13-1590-012, and Parker’s Torqmotor service documentation.