Product Overview
The TF0195GS050AAAA, TF0195EW410AAAB, and TF0240 are representative models in the Parker Torqmotor™ TF Series of Low Speed High Torque (LSHT) orbital hydraulic motors, covering displacements from 197 cm³/rev (TF0195) to 238 cm³/rev (TF0240). The TF0195GS050AAAA is a Clutch Motor variant featuring an integrated spring-released face spline clutch that enables a freewheeling output shaft function. The TF0195EW410AAAB is the standard orbital motor configuration, while the TF0240 is the 238 cm³/rev medium-large displacement standard model. All three models achieve complete drop-in interchangeability with Parker TF Series originals in SAE A 2-bolt mounting flange, magneto mount, wheel mount, output shaft configuration (Ø31.75 mm, 1 1/4″ 14-tooth spline), and port positions.
The series features Parker’s patented 60:40 spline geometry, with all splines continuously flushed with cool fluid for extended service life. A high-pressure shaft seal is standard, and the innovative design eliminates the need for a case drain. The TF Series handles intermittent pressures to 4,000 psi and torques to 8,100 lb-in. Side load capability is 4,000 lb on flange mounts and 6,000 lb on wheel mounts. Shaft size is 1.25 inch nominal. Designed and manufactured in Greeneville, TN USA.
Every motor undergoes 100% simulated load testing before shipment, with protocols covering output torque verification at rated pressure, volumetric efficiency measurement at multiple speed points, internal leakage testing, and overspeed validation.
Technical Specifications (Bulleted List)
Basic Specifications
Model: TF0195GS050AAAA / TF0195EW410AAAB / TF0240
Motor Type: Low Speed High Torque (LSHT) Orbital Motor
Product Series: Parker Torqmotor™ TF Series
Mounting Flange: SAE A 2-Bolt / Magneto Mount / Wheel Mount (optional)
Shaft Type: 1 1/4″ 14-Tooth Involute Spline
Port Size: 7/8″-14 SAE O-Ring
Max. Dynamic Side Load at Key: 4,000 lb (1,814 kg) flange mount / 6,000 lb (2,722 kg) wheel mount
Shaft Diameter: Ø31.75 mm (1.25 inch)
Case Drain: Not required (innovative seal design)
TF0195GS050AAAA Performance Data (Displacement Code 0195 / Clutch Motor)
Geometric Displacement: 197 cm³/rev [12.0 in³/rev]
Max. Speed (Continuous): 300 rpm
Max. Speed (Intermittent): 380 rpm
Max. Pressure Drop (Continuous): 138 bar (2000 psi)
Max. Pressure Drop (Intermittent): 207 bar (3000 psi)
Max. Supply Pressure: 300 bar (4350 psi)
Min. Starting Torque (Continuous): 366 N·m (3242 lb-in)
Min. Starting Torque (Intermittent): 572 N·m (5058 lb-in)
Max. Flow (Continuous): 60 L/min
Max. Flow (Intermittent): 75 L/min
Clutch: Spring-released face spline coupling, freewheeling output shaft without hydraulic pressure
Weight: Approx. 14 kg
TF0195EW410AAAB Performance Data (Displacement Code 0195 / Standard Motor)
Geometric Displacement: 197 cm³/rev [12.0 in³/rev]
Max. Speed (Continuous): 300 rpm
Max. Speed (Intermittent): 380 rpm
Max. Pressure Drop (Continuous): 140 bar (2031 psi)
Max. Pressure Drop (Intermittent): 210 bar (3046 psi)
Max. Torque (Continuous): 289 N·m
Max. Torque (Intermittent): 395 N·m
Max. Flow (Continuous): 60 L/min
Max. Flow (Intermittent): 75 L/min
Weight: Approx. 14 kg
TF0240 Performance Data (Displacement Code 0240 / 238 cm³/rev)
Geometric Displacement: 238 cm³/rev [14.5 in³/rev]
Max. Speed (Continuous): 320 rpm
Max. Speed (Intermittent): 420 rpm
Max. Pressure Drop (Continuous): 140 bar (2031 psi)
Max. Pressure Drop (Intermittent): 207 bar (3000 psi)
Max. Torque (Continuous): 366 N·m
Max. Torque (Intermittent): 572 N·m
Max. Flow (Continuous): 75 L/min
Max. Flow (Intermittent): 100 L/min
Max. Output (Continuous): 27.7 kW (37.1 HP)
Weight: Approx. 15 kg
Full TF Series Displacement Range
TF0080: 81 cm³/rev, 550 rpm max, 220 N·m continuous torque
TF0100: 100 cm³/rev, 600 rpm max
TF0130: 128 cm³/rev, 470 rpm max
TF0140: 141 cm³/rev, 370 rpm max
TF0170: 169 cm³/rev, 355 rpm max
TF0195: 197 cm³/rev, 300 rpm max, 289 N·m continuous torque
TF0240: 238 cm³/rev, 320 rpm max, 366 N·m continuous torque
TF0280: 280 cm³/rev, 270 rpm max
TF0360: 364 cm³/rev, 200 rpm max
TF0405: 405 cm³/rev, 170 rpm max
TF0475: 477 cm³/rev, 150 rpm max
Materials & Construction
Housing: High-strength cast iron
Gear Set: Roller vane gerotor design
Powertrain: Patented 60:40 spline geometry, continuous cool fluid flush
Bearings: Tapered roller bearings
Shaft Seal: High-pressure shaft seal, no case drain required
Key Technical Advantages
1. Patented 60:40 Spline Geometry with Continuous Fluid Flush
The TF Series features Parker’s patented 60:40 spline geometry, precisely optimized for optimal load distribution and significantly enhancing the load-bearing capacity of drivetrain components. More innovatively, all splines are designed to be continuously flushed with cool hydraulic fluid—during operation, hydraulic oil flows continuously through the spline engagement zone, effectively carrying away friction heat and wear particles, fundamentally extending spline service life. The face spline clutch in the TF0195GS050AAAA benefits equally from this design, ensuring long-term transmission precision even under frequent clutch cycling.
2. Clutch Freewheeling Function (TF0195GS050AAAA Exclusive)
The TF0195GS050AAAA’s core technical feature is its integrated spring-released face spline clutch. The clutch is held apart by springs, disconnecting the motor from the output shaft and allowing the output shaft to freewheel. When hydraulic pressure is applied to either motor port, the springs separating the coupling are overcome and the motor is coupled to the output shaft, transmitting torque. This function is particularly suited for applications requiring intermittent power output—such as aerial work platforms where the output shaft freewheels during descent, and street sweepers where hydraulic power is not required during non-sweeping travel.
3. High-Performance Shaft Seal with No Case Drain Requirement
The TF Series is equipped with a standard high-pressure shaft seal whose innovative design eliminates the need for a case drain line. In conventional orbital motors, the case drain line guides internal leakage oil back to the reservoir, preventing excessive case pressure that could damage the shaft seal. The TF Series shaft seal design directly withstands system return pressure, eliminating the need for an additional drain line and significantly simplifying hydraulic circuit layout and installation costs. This design advantage is particularly significant for machines with constrained installation spaces.
4. High Side Load Capacity and Rugged Construction
Flange-mounted versions accommodate dynamic side loads at the shaft end up to 4,000 lb (1,814 kg), while wheel-mounted versions handle up to 6,000 lb (2,722 kg), suitable for applications involving direct drive of gears, sprockets, pulleys, or wheels. The patented spline geometry and continuous fluid flush design ensure the motor does not experience excessive shaft deflection under side loads, preserving gear mesh precision and long-term shaft seal reliability.
5. 100% Simulated Load Testing & Batch Consistency
Every TF Series motor undergoes 100% simulated load testing before shipment. Test protocols cover output torque verification at rated pressure, volumetric efficiency measurement at multiple speed points, internal leakage testing, overspeed validation, and noise assessment. All test data is archived and traceable, ensuring each motor’s performance matches its published specifications.
Application Areas
Aerial Work Platforms: Scissor lift drive (utilizing freewheeling function of TF0195GS050AAAA clutch motor for platform descent)
Street Sweepers / Municipal Vehicles: Brush drive, snow removal vehicle drive
Agricultural Machinery: Combine harvester reel drive, fertilizer spreaders, sprayers
Material Handling: Conveyor drives, winch drives
Forestry Equipment: Wood chippers, timber cutting machine drives
Construction Machinery: Skid steer attachments (augers, breakers, sweepers)
Turf Equipment: Zero-turn radius mowers, golf course maintenance equipment
Expert Maintenance Tips
1. Mounting Fit and Bolt Torque
Before installation, verify that the mounting flange spigot and machine mounting bore conform to H8/f7 tolerance fit. Tighten mounting bolts in diagonal sequence in 2-3 stages to the specified torque. The output shaft is a 1 1/4″ 14-tooth spline—ensure spline engagement length is no less than 80% of total spline length to avoid localized stress concentration. Use 7/8″-14 SAE O-ring seals for port connections; recommended tightening torque is 40-45 N·m.
2. Clutch Motor Specific Considerations (TF0195GS050AAAA)
When installing the TF0195GS050AAAA clutch motor, verify that both motor ports are free of residual pressure when the hydraulic system is in the non-operating state, ensuring the clutch springs can fully disengage the face spline coupling and achieve the freewheeling output shaft function. If residual back pressure exists in the system, the clutch may not fully disengage, compromising freewheeling performance. Periodically inspect the clutch engagement surface for wear; if significant wear marks appear on the face spline teeth, replace the clutch assembly promptly.
3. System Flushing and Oil Cleanliness
After initial installation or motor replacement, operate at 200-400 rpm under no load for 10-15 minutes to purge air. System oil cleanliness should meet NAS 9 or ISO 18/15 or better. A 10 μm return-line filter is recommended. ISO VG 46 or VG 68 anti-wear hydraulic oil is recommended, with viscosity maintained between 20-75 mm²/s.
4. Storage and Extended Shutdown
For long-term storage, install port plugs to prevent contamination and fill the motor with clean hydraulic oil. Store at temperatures between -20°C and +50°C, away from direct sunlight and moisture. Motors stored for more than 6 months should undergo an internal leakage check before installation. For splined shaft models, pay particular attention to spline protection during storage—apply anti-rust grease to the splined section.
