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THP / PCF Series

THP / PCF Power Steering Gears
TRW’s tradition of state-of-the-art advancement numerous enhancements for performance and comfort are expertly engineered into the design of THP / PCF Power Steering Gears, including a positive center feel (PCF) option. And RCH assist gears are also available for extra power in heavy duty applications.

Industry-Leading Power from Compact Design
The THP / PCF Power Steering Gears from TRW offer durable performance from a compact design. With an industry-leading power-to-size ratio, THP / PCF gears are better equipped to maneuver in tight corners and reduce driver fatigue.

Better Turns and Reduced Friction
The faster steering ratio of THP / PCF Power Steering Gears from TRW improves lock-to-lock turns. Meanwhile, lower internal-gear friction allows steering to return to the center more quickly without additional exertion from your driver.

A Precise, Positive Center Feel
Available with a positive center feel (PCF) option, THP / PCF Power Steering Gears ensure steady, precise handling while driving straight down the open highway — allowing for longer, more comfortable hauls.

 

Performance Specifications
  THP45 THP60 PCF60
Front Axle Weight 9,000 lbs
4,000 kg
14,300 lbs
6,500 kg
14,300 lbs
6,500 kg
Pressure Rating 2,683 psi
185 bar
2,683 psi
185 bar

2,683 psi
185 bar

Output Torque at Rated
Pressure 90%
 Efficiency 
30,420 in / lbs
3,437 N-m
43,110 in / lbs
4,930 N-m
43,110 in / lbs
4,930 N-m
Gear Travel 100° 100° 100°
Gear Ratio(s) 17.5:1 18.2:1 18.2:1
Output Shaft Diameter 1.75 in
44.5 mm
2.00 in
50.8 mm
2.00 in
50.8 mm
Output Shaft Serrations  1.75 in x 46
Straight
1.937 in x 52
Straight 
1.937 in x 52
Straight 
Input Shaft Serrations  .812 in x 36
Straight
.812 in x 36
Straight
.812 in x 36
Straight
Maximum Operating 
Temperature
250° F
121° C
250° F
121° C
250° F
121° C
Minimum Pump Flow 
1.5 hwt/sec 
2.4 gpm
9.0 lpm
2.9 gpm
11.0 lpm
2.9 gpm
11.0 lpm
Recommended Pump
Flow Control Range
 
3.6-6.3 gpm
13.6-24 lpm
3.6-6.3 gpm
13.6-24 lpm
3.6-6.3 gpm
13.6-24 lpm
Approximate Dry Weight  58 lbs
26.3 kg
63 lbs
28.6 kg
63 lbs
28.6 kg
Dependable Features
  • Higher pressure ratings reduce overall package size and increase wheel cut
  • Reduced friction lessens driver fatigue
  • PCF option improves feel of on-center steering
  • Precision in straight-ahead driving reduces driver fatigue and increases long-haul use

Download Product Sheet

RCS Steering Gear ThumbnailRCH Assist Gear Option Available 



RCH Assist Gears, available as a THP/PCF gear option, provide extra power for severe heavy duty applications.

TRW

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