Product Overview
The TL0170US031AAAA is a medium-duty, low-speed high-torque (LSHT) orbital hydraulic motor from Parker’s Torqmotor™ TL Series, with a geometric displacement of 169 cm³/rev. The TL Series is a compact, shortened version of Parker’s proven TG Series workhorse motor, designed for wheel-drive and space-constrained medium-duty applications.
The defining engineering characteristic of the TL Series is its superior side load capacity—up to 16013 N dynamic side load at the key with a 31.75 mm nominal shaft. The motor features a reinforced roller vane rotor set, a patented high-pressure shaft seal, and an innovative case-drain-free design that simplifies system plumbing. The motor housing is cast iron, with fluorocarbon shaft seals and Vespel commutator seals as standard, ensuring sealing reliability under high-temperature and high-pressure conditions.
Each TL0170US031AAAA undergoes 100% simulated duty-cycle testing prior to shipment, validating volumetric efficiency, torque output, and low-speed stability under both dynamic instantaneous and static steady loads. Dimensional and functional interchangeability with the original Parker Torqmotor ensures true drop-in replacement—mounting flange, shaft configuration, and port geometry all match Parker OEM specifications. Designed and manufactured in Greeneville, TN USA.
Technical Specifications
Model: TL0170US031AAAA
Series: Parker Torqmotor™ TL Series
Geometric Displacement: 169 cm³/rev (10.3 in³/rev)
Maximum Speed (Intermittent): 512 rev/min
Maximum Differential Pressure (Continuous): 190 bar (2750 PSI)
Maximum Differential Pressure (Intermittent): 241 bar (3500 PSI)
Maximum Supply Pressure: 300 bar (4350 PSI)
Maximum Oil Flow (Continuous): 68 L/min (18 GPM)
Maximum Oil Flow (Intermittent): 95 L/min (25 GPM)
Maximum Torque (Continuous): 449 Nm
Maximum Torque (Intermittent): 570 Nm
Maximum Performance: 34 kW
Minimum Starting Torque (Continuous): 354 Nm
Minimum Starting Torque (Intermittent): 445 Nm
Mounting: US Standard Flange
Shaft: 1-1/4 inch Nominal
Ports: SAE Standard
Maximum Dynamic Side Load at Key: 16013 N (3600 lb)
Housing Material: Cast Iron
Weight: Approx. 11.1 kg (24.5 lb)
Key Technical Advantages
Superior side load capacity. The TL Series orbital motor withstands up to 16013 N dynamic side load at the key—a leading specification among medium-duty orbital motors in its class, far exceeding the limits of conventional bushing-type designs. The roller vane rotor set reduces friction coefficients while enhancing load distribution uniformity, enabling long service life under high side-load conditions such as chain drives, sprocket connections, and direct wheel hub drives.
Patented high-pressure shaft seal with case-drain-free design. A patented high-pressure shaft seal is fitted as standard, utilizing fluorocarbon material for stable sealing performance under high-temperature and high-pressure conditions. The innovative case-drain-free design eliminates an additional hydraulic connection and its associated leak potential, simplifying system layout and reducing installation complexity and maintenance costs. Continuous oil flow through the internal spline passages provides ongoing cooling and lubrication, significantly extending spline and motor life.
Cast iron housing and precision manufacturing. The cast iron housing offers higher rigidity and wear resistance than aluminum alternatives, minimizing housing deformation under high pressure and helping maintain flow distribution accuracy. Vespel commutator seals are standard, delivering high distribution precision and low internal leakage—even at low speeds. The rotor set is precision-ground to tight tolerances, forming a high-pressure oil film seal for smooth extra-low-speed operation.
Full-flow spline cooling and lubrication. The internal spline region is designed with continuous oil flow passages that flush the spline engagement surfaces, carrying away friction heat and wear debris. This design ensures rotor timing is unaffected by drive link twist or shaft loads, maintaining distribution phase accuracy and long-term transmission efficiency. Particularly beneficial in applications involving frequent start-stop cycles, reversals, and sustained high-load operation.
Application Areas
Zero-turn radius mowers
Skid steer attachments
Trenchers
Winches and conveyor drives
Aerial work platform drives
Turf maintenance equipment
Specialty harvesters (potato, tomato, nut, leafy vegetable, sugar, cotton, coffee, grape)
Sprayers and spreaders
Mini and walk-behind skid steers
Tool carriers
Expert Maintenance Tips
Verify interface compatibility before installation. Before installing the TL0170US031AAAA, confirm the mounting flange bolt pattern, shaft specification (1-1/4 inch nominal), and port dimensions against the original motor. While the model is designed as a drop-in interchange for Parker TL0170 series motors, variations in option codes may indicate differences in port configuration or surface treatment. Cross-check against the original nameplate.
Prime and bleed before first start. After initial installation or extended storage, air may be trapped within the motor casing. Fill the casing with clean hydraulic oil through the highest port before startup, then jog the motor at low pressure (≤30 bar) several times to purge residual air. Apply full working pressure only after the motor runs smoothly.
Maintain oil cleanliness. Target an ISO cleanliness level of 18/16/13 or better for system fluid. The close clearances between the rotor set and commutator are sensitive to particulate contamination; inadequate cleanliness accelerates wear, reduces volumetric efficiency, and increases internal leakage. Use return-line filtration rated at 10 μm or finer.
Inspect shaft seal and splines periodically. The high-pressure shaft seal is a critical wear component. Inspect for weeping or dripping every 2000 operating hours. Also check the spline area for wear; if significant wear or increased clearance is detected, replace the spline components promptly.
