Also you must remember that a truck with failed power steering will feel much more difficult to manouver as turning the wheel means having to manually move the hydraulic rams at each end of the rack which will still have oil in even though it is no longer pressurised.
Steering a truck with no power steering at all fitted is still a laborious task but not so bad as only the resistance caused by the weight of the truck pressing the tyres to the road surface has to be overcome.
Power steering out, hats off to the old schoolers
Discussion in 'Trucks [ Eighteen Wheelers ]' started by VARITHMS, Jun 8, 2010.
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droy Thanks this.
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I drive an old volvo and i'm on another forum where people talk about doing high performance modifications to them. I always see people do manual steering conversions to get more horsepower, which is bad enough since it's not a lot of gain. But most of them are disconnecting the steering rack from the pump, draining all of the oil but leaving some for lubrication, and running a hose from one end of the rack to the other. I've never driven one but I just have to roll my eyes every time i see it mentioned. The better modification is to actually put a manual rack in it, but no modern volvo ever had a manual rack....big modifications required....... -
1) Freightliner has rack-and-pinion available, which i think is amazing.
2) What i don't get is why newer trucks just don't have the positive caster settings as in older trucks----if you're going 55-75 mph and the power steering goes out, then you don't need much p/s at that speed anyways.
If the P/S goes out at lower speeds, then the ability to steer is not as crucial because you can stop sooner.
Am i missing something here? -
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It was pretty new for this conversation being a 1977 but the truck was very odd compared to all the truck & pup trailers we normally drove.
But anyway, I had a similiar incident where a mechanic left a can of wd-40 under the seat which later in my shift spewed out a huge cloud of white mist after puncturing it with my seat.
Later that day, the night shift driver ragged on me for not doing a better job of cleaning up the cab and than went on to hit a two thousand pound bull on a dark country road. Ground round all over the highway.
Truck went straight to the junk yard.
Yeah, memories to last a lifetime.Last edited: Jun 14, 2010
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Well I took the truck back to I.M.E. to see if they could rebuild the steering pump. The steering would only turn 3/4 of the way and would go back to manuel and I would have to force the last 1/4. I thought the pump was damaged when it dumped all the fluid. I was wrong.
There are two adjustment screws on the front of the gear box (just rebuilt). One guy turned the steering wheel all the way to the left while the other guy adjusted the left screw. As the adjustment screw was turned it allowed the steering to be turned even more. The left screw was for turning left and the right the right. They adjusted it untill the steering was in a bind and then backed off a little. It allowed the wheels to come with 6-8" of the frame.
The truck turns better than ever. If your not happy with the way your truck steers I recomend checking it out. My adjustment screws where full of paint to you may have to do some digging. -
Just 'cuz the wheel turns doesn't mean you should turn it. -
Although my post was in reference to maneuvering a loaded truck back in the day when no powersteering was common place. Very few drivers had the strength necessary to turn the wheel while sitting still with a load on. Including me. You had to keep the truck moving if you wanted to turn the wheel.
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