ok-rver Posted May 19, 2022 Share Posted May 19, 2022 Watts linkage installed on front H-frame. Original TRW steering box pretty tight. Had wife move steering wheel while checking for looseness in tie rod ends/drag link, no noticeable play. Using velco wrap that is stationary on wheel rim. Pictures show 3-1/2" of movement in wheel from right to left steer with engine OFF. This is with wheel tilt to almost flat and measuring to reference point on dash. Moderate amount of pressure in turning wheel. Do not believe there is any movement in tires. If my math is correct, this is about 20 deg of wheel movement. If engine was running, tires would have moved a bit at this wheel rotation. Wondering if any one else has tried this measurement and how different MHs compare? Link to comment Share on other sites More sharing options...
Tom Wallis Posted May 19, 2022 Share Posted May 19, 2022 With the engine off you are measuring the movement of the actuating valve in the power steering. Starting the engine eliminates almost all of that movement. 1 Link to comment Share on other sites More sharing options...
ok-rver Posted May 20, 2022 Author Share Posted May 20, 2022 I am working thru HYDRAPOWER INTEGRAL POWER STEERING GEAR HFB 64 service manual. TRW Ross Division for truck with around 12k front load. I see the torsion bar and how it controls the valve sending fluid to either side of the rack. Not finding how much movement is full rotation of the torsion bar. still looking for more info. maybe this link will work https://www.wanderlodgeownersgroup.com/downloads/TRW Hydrapower Integral Power Steering Gear.pdf Link to comment Share on other sites More sharing options...
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