TL0170US031AAAA Parker Torqmotor TL Series LSHT Hydraulic Motor 170cc

Product Overview

The TL0170US031AAAA is a Parker Torqmotor™ TL Series medium-duty low-speed, high-torque (LSHT) orbital hydraulic motor with a nominal displacement of 170 cm³/rev (actual geometric displacement: 169 cm³/rev). As the second displacement size in the TL Series lineup, this motor delivers the power density of Parker’s proven TG Series in a significantly shortened, compact package — ideal for wheel-drive and space-constrained installations.

Built with a cast-iron housing, a high-pressure shaft seal as standard, and Parker’s patented continuous oil flow spline lubrication design, the TL0170US031AAAA delivers dependable performance in demanding medium-duty applications. The innovative high-pressure shaft seal eliminates the need for a case drain line, simplifying hydraulic circuit design and removing a common failure point. Every unit undergoes 100% simulated load testing prior to shipment, verifying displacement, pressure rating, and speed performance against original specifications.

Technical Specifications (Bulleted List)

• Model Number: TL0170US031AAAA

• Brand / Series: Parker Torqmotor™ TL Series

• Motor Type: Medium-Duty Low-Speed High-Torque (LSHT) Orbital Motor

• Geometric Displacement: 169 cm³/rev (nominal 170 cm³/rev)

• Series Displacement Range: 140 – 364 cm³/rev

• Continuous Pressure Differential: 172 – 190 bar

• Intermittent (Peak) Pressure Differential: 224 – 241 bar

• Maximum Continuous Flow: 68 L/min

• Maximum Intermittent Flow: 95 L/min

• Maximum Operating Speed: 255 – 613 RPM at intermittent flow

• Maximum Intermittent Output Torque: 463 – 1163 Nm

• Minimum Intermittent Starting Torque: 365 – 1002 Nm

• Nominal Shaft Diameter: 31.75 mm (1.25 inch)

• Max. Dynamic Radial Load: 16,013 N at keyway

• Housing Material: Cast Iron

• Shaft Seal: Fluorocarbon High-Pressure Shaft Seal (standard)

• Commutator Seal: Vespel Material

• Bearing Type: Thrust Bearing + Radial Roller Bearings

• Design & Manufacture: Greeneville, TN USA

• Weight: Approx. 11.10 kg

Key Technical Advantages

1. Continuous Oil Flow Across Splines — Extended Spline and Motor Life

The TL Series incorporates Parker’s patented spline lubrication design, directing hydraulic fluid continuously across the spline interface between the rotor and drive coupling during operation. This engineering approach maintains a stable hydrodynamic lubricating film on the spline tooth surfaces, effectively reducing friction coefficient and fretting wear. Under full-flow spline lubrication, spline wear rates are substantially lower than in conventional intermittent-lubrication architectures, delivering meaningful service life extension for the complete motor. This design is particularly advantageous in applications involving frequent start-stop cycles, alternating rotation directions, or sustained high-load operation.

2. High-Pressure Shaft Seal as Standard — No Case Drain Required

The TL Series comes equipped with a high-pressure shaft seal as standard equipment, featuring an innovative sealing architecture rated for intermittent pressures up to 241 bar. This design completely eliminates the need for a case drain line, simplifying hydraulic circuit layout, reducing potential leak paths, and lowering the risk of motor failure from blocked or damaged drain lines. For space-constrained wheel-drive applications, the case-drain-free design delivers significant installation advantages.

3. High Side-Load Capacity with Compact Footprint — Optimized for Chain and Wheel Drives

The TL0170US031AAAA features a 31.75 mm nominal shaft capable of withstanding dynamic radial loads up to 16,013 N at the keyway. The TL Series employs a combined thrust bearing and radial roller bearing architecture, delivering both high side-load capacity and end-thrust capability (supporting up to 1000 lbs. / 453.6 kg end-thrust in either direction). As the compact version of the TG Series, the TL Series preserves the same power density while significantly reducing overall length — making it ideally suited for wheel drives, chain sprocket drives, and gear-driven systems where installation envelope is critical.

4. Precision Commutation System and High Volumetric Efficiency — Smooth Low-Speed Operation

The TL Series utilizes a roller vane rotor and sealed commutator design, with Vespel commutator seals maintaining high volumetric efficiency across the full speed range while delivering smooth extra-low-speed performance. Rotor and stator components are precision-matched during manufacturing, with critical mating surface tolerances controlled to micron-level accuracy. The patented commutation system and 60:40 spline arrangement optimize torque transmission smoothness, effectively suppressing stick-slip behavior and pressure pulsation during low-speed operation.

Application Areas

• Turf & Municipal Equipment: Zero-turn radius mowers, golf course maintenance equipment, sweepers

• Agricultural Machinery: Specialty harvesters (potato, tomato, nut, leafy vegetable, sugar, cotton, coffee, grape), sprayers

• Construction Equipment: Trenchers, skid steer attachments, mini and walk-behind skid steers, tool carriers

• Material Handling: Conveyors, winches, boom rotate drives

• Aerial Work Platforms: Scissor lifts, aerial work platforms

• Vehicle Propulsion: Wheel drives, chain drives, propel systems

Expert Maintenance Tips

Installation: Before mounting, verify that the flange pilot diameter and mounting face tolerance conform to SAE specifications. The pilot should enter the mating bore without force — do not drive it in with a mallet, as this can distort the pilot. Shaft-to-coupling alignment must be held within 0.05 mm radial deviation; excessive angular misalignment will significantly shorten roller bearing service life. Since the TL Series requires no case drain line, no drain port plumbing is necessary during installation, but ensure all port connections are tightened to specified torque values to prevent leakage.

Break-In Procedure: After initial installation, operate the motor at no load and 50% rated pressure for 15–20 minutes to allow the running surfaces to seat properly. Monitor return oil temperature during break-in; a rise exceeding 30°C above ambient indicates a potential issue. After break-in, drain the reservoir and replace the filter element to remove trace metallic particles generated during the seating process.

Routine Maintenance: Inspect the high-pressure shaft seal area regularly for signs of weeping or leakage. Maintain hydraulic fluid cleanliness at NAS Class 8 or ISO 18/15 or better — particulate contamination is the primary cause of commutator wear and volumetric efficiency degradation. Maximum operating temperature should not exceed 93.3°C (200°F). A preventive inspection is recommended every 2,000 operating hours or 12 months, whichever comes first, focusing on spline wear measurement, commutator surface condition, and shaft seal lip integrity.