TG0240HW460BBBN Parker Torqmotor TG240 LSHT Hydraulic Motor 240cc

Product Overview

The TG0240HW460BBBN is a Parker Torqmotor™ TG Series medium-duty low-speed, high-torque (LSHT) orbital hydraulic motor with a nominal displacement of 240 cm³/rev. As the fourth displacement size in the TG Series lineup — Parker’s flagship medium-duty gerotor motor platform — this motor delivers a step change in torque output, radial load capacity, and pressure rating compared to the light-duty TE Series and the compact TL Series.

This specific variant features a cylindrical keyed shaft (31.75 mm nominal), a 4-bolt flange mount, side-threaded ports, and bi-directional rotation. An integral pressure relief valve is fitted as standard, providing automatic overpressure protection during sudden load spikes — a critical safeguard in applications such as earth augers encountering hard rock strata or winches subjected to shock loading.

Every unit is manufactured to exact Parker original specifications, ensuring true drop-in interchangeability across mounting flange dimensions, shaft configuration, port positions, and rotation direction — no system modification required. Each motor undergoes 100% simulated load testing prior to shipment, verifying displacement, pressure rating, torque output, and speed performance against the original datasheet.

Technical Specifications (Bulleted List)

• Model Number: TG0240HW460BBBN

• Brand / Series: Parker Torqmotor™ TG Series

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

• Geometric Displacement: 240 cm³/rev (nominal)

• Series Displacement Range: 141 – 959 cm³/rev

• Continuous Pressure Differential: 207 bar (3000 PSI)

• Intermittent (Peak) Pressure Differential: 276 – 280 bar (4000 PSI)

• Maximum Continuous Flow: 76 L/min (20 GPM)

• Maximum Intermittent Flow: 95 L/min (25 GPM)

• Maximum Continuous Speed: 320 RPM

• Maximum Intermittent Speed: 393 RPM

• Maximum Intermittent Output Torque: 913 Nm (8081 lb-in)

• Maximum Continuous Output Torque: 677 Nm (5991 lb-in)

• Minimum Intermittent Starting Torque: 776 Nm (6865 lb-in)

• Nominal Shaft Diameter: 31.75 mm (1.25 inch), cylindrical keyed

• Mounting Flange: 4-Bolt Flange

• Port Size: G 1/2 BSPP (side-threaded)

• Max. Dynamic Radial Load: 16,013 N (3,600 lbs) at keyway

• Housing Material: Cast Iron

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

• Rotation: Bi-directional

• Integral Valve: Pressure Relief Valve

• Design & Manufacture: Greeneville, TN USA

• Weight: Approx. 16.8 – 18.0 kg

Key Technical Advantages

1. Continuous Oil Flow Across Splines — Full Powertrain Lubrication Protection

The engineering centerpiece of the TG Series is its patented continuous oil flow across splines design. Hydraulic fluid is continuously directed across the spline interface between the rotor and drive coupling during operation, while simultaneously washing the entire powertrain — including the torque link and thrust bearings — in cool, high-flow fluid. This full-flow washing architecture maintains a stable hydrodynamic lubricating film on the spline tooth surfaces, effectively reducing friction coefficient and fretting wear. Under sustained high-load duty cycles such as earth augers and winches, spline and bearing wear life substantially exceeds that of conventional intermittent-lubrication architectures. The torque link features Parker’s patented 60:40 internal-to-external spline geometry, transmitting over 13,000 lb-in of torque in a lighter, more compact package.

2. High-Pressure Shaft Seal and Case-Drain-Free Design — Simplified Hydraulic Architecture

The TG0240HW460BBBN comes equipped with a high-pressure shaft seal rated for intermittent pressures up to 280 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. Parker notes that this design “eliminates the need for a case drain,” thereby “reducing the need for hoses and fittings, which in turn saves costs for the machine builder”. For space-constrained wheel-drive and propelling applications, the case-drain-free architecture delivers significant installation advantages.

3. High Side-Load Capacity with Integral Relief Valve — Reliability Under Harsh Conditions

The TG0240HW460BBBN features a 31.75 mm nominal keyed shaft capable of withstanding dynamic radial loads up to 16,013 N (3,600 lbs) at the keyway. The TG Series utilizes roller vane rotors and sealed commutator designs, with commutator seals maintaining high volumetric efficiency across the full speed range while delivering smooth extra-low-speed performance. The integral pressure relief valve — a distinguishing feature of this variant compared to the TG0240AS/EW/US base configurations — automatically opens to relieve system pressure when external loads cause a sudden pressure spike, protecting the motor’s internal running surfaces from destructive pressure peaks. This protective capability is irreplaceable in applications such as earth augers drilling into hard strata or winches subjected to shock loading.

4. Precision Machining and High Volumetric Efficiency — Sustained Output Reliability

The rotor, stator, and commutator plate — the core kinematic elements of the motor — are manufactured using precision CNC machining, with critical mating surface tolerances controlled to micron-level accuracy. The stator profile is optimized to produce a smooth volumetric transition during tooth engagement, effectively suppressing pressure pulsation and noise caused by trapped oil. Empirical testing confirms volumetric efficiency exceeding 90% under rated conditions, with stable speed and torque output maintained even after extended continuous operation. The TG Series is designed and manufactured at Parker’s Greeneville, TN facility, adhering to Parker’s global quality control standards.

Application Areas

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

• Agricultural Machinery: Combine header drives, specialty harvesters (potato, tomato, nut, leafy vegetable, sugar, cotton, coffee, grape), sprayers, post-hole augers

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

• Material Handling: Conveyors, winches, wood chippers, boom rotate drives

• Turf & Municipal Equipment: Zero-turn radius mowers, golf course maintenance equipment, sweepers, snow removal equipment, salt and sand spreaders

• Aerial Work Platforms: Scissor lifts, aerial work platforms

• Oil & Gas: Blender truck drives

• Forestry & Mining: Wood chipper feed rollers, mining equipment drives

Expert Maintenance Tips

Installation: Before mounting, verify that the 4-bolt flange pilot diameter and mounting face tolerance conform to Parker 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. For G 1/2 BSPP side ports, tighten to specified torque values using a calibrated torque wrench. Since the TG Series requires no case drain line, no drain port plumbing is necessary during installation, but ensure all port connections are properly sealed.

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. Important: The integral pressure relief valve setting must be adjusted in accordance with Parker specifications and must not be arbitrarily increased, as doing so will compromise the motor’s overpressure protection.

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, shaft seal lip integrity, and verification of the pressure relief valve setting for drift.