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Old Oct 20, 2008 | 03:39 PM
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Post Power sterring

When I put my foot on my brakes and turn the wheel it is hard to turn. When i take my foot off the brakes the truck is easy to turn, Does this mean my power sterring pump need to be replaced?
 
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Old Oct 21, 2008 | 12:31 PM
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What truck is it? If it has the normal vacuum brake booster then braking should not affect your steering, if hydraboost then it may.
 
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Old Oct 21, 2008 | 05:28 PM
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my 2001 F-250 Super Duty 7.3 liter Diesek Truck
When I step on the brake and the truck is staionary it hard to turn the wheel when the truck is moving it is not hard to turn the wheel in any direstion It does not make any type of noise its just hard to turn. The guy at the ealership say i need a new power steering pump because it is leaking. But i filled the resevoir up and i am not getting any leaks in my driveway So i think the dealership wanted to make a quick couple $100 dollars off of me. I just want a second or third opinion before i go and change it myself.
 
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Old Oct 22, 2008 | 08:05 AM
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Can you turn the steering easily with the truck stationary but the brakes not applied? How much fluid did you have to add? If a lot it would sound like you have a leak.
 
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Old Oct 22, 2008 | 10:56 AM
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Hey
Yes when the truck is stationary and brakes not applied steering is easy I' ve just added some sterring fluid an waiting to see if it leaks in my driveway or I lose the fluid while driving Ill be riving it to work today so ill see tonight or tomorrow morning I havent added brake fluid since i got it which was last year an i use the truck for jobs or during the weekend. So that way it dont sit around.
 
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Old Oct 22, 2008 | 11:01 AM
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Hey
Yes when the truck is stationary and brakes not applied steering is easy I' ve just added some sterring fluid an waiting to see if it leaks in my driveway or I lose the fluid while driving Ill be riving it to work today so ill see tonight or tomorrow morning I havent added brake fluid since i got it which was last year an i use the truck for jobs or during the weekend. So that way it dont sit around.
 
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Old Oct 22, 2008 | 12:24 PM
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Yes see if you loose any fluid after driving it. As your truck is a HD with diesel there is a good chance it is hydraboost brakes. Just to confirm could you lift the hood and look at the brake master cylinder (on the firewall at drivers side). Is the master cylinder bolted to a large round steel "drum" with one pipe attached to it or is the master cylinder bolted to a small device with two hydraulic hoses attached to it?
 
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Old Oct 22, 2008 | 12:44 PM
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i thought all diesels are hydroboost because they dont create vaccum
 
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Old Oct 22, 2008 | 11:24 PM
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so another words Lazy K. It is suppose to be like that?

I'll just also keep and eye on my power steering fluid and if it goes low then obviously i have a leak. I dont know much about diesels, and i dont want to wind up having mechanics rip me off. so thats why i want to see what i can find out on here
 
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Old Oct 22, 2008 | 11:29 PM
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I will also look at the master cylinder to see what kind of device is sttached to it on the river side
 
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Old Oct 23, 2008 | 07:11 AM
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Originally Posted by someday
i thought all diesels are hydroboost because they dont create vaccum
A lot of diesels (including my `87F250 6.9) use a normal vacuum booster with a belt driven vacuum pump. However with his being an F350 I would think it probably is hydraboost, so the power brakes and the steering both use the same hydraulic pump.
 
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Old Oct 23, 2008 | 09:48 AM
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MY Super duty is and F-250 7.3liter diesel

well today im going to check to see if its has a hyurd boost ill check it out but if all iesels are hydroboost brakes

and ill get back online and let you know. I think i have hydrobioost brakes there are 2 klins coming out of something and going into the power steering pump
 
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Old Oct 23, 2008 | 10:55 AM
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my 05 e450 v10 has hydroboost for some strange reason...are hydroboost systems required for heavy duty systems, better, etc?
 
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Old Oct 23, 2008 | 11:26 AM
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So I take it that systems with hydro boost brakes we should be getting the same effect with pushing the brake pedal in a stationary location that our steering will be difficult to turn ?
 
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Old Oct 23, 2008 | 12:17 PM
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Originally Posted by FireWarrior
So I take it that systems with hydro boost brakes we should be getting the same effect with pushing the brake pedal in a stationary location that our steering will be difficult to turn ?
Unfortunately the last (and only) truck I had with hydraboost brakes was a Dodge many years ago and I can`t remember if I got power steering when stationary with the brakes applied. I would have thought the pump should be able to supply both. And yes hydraboost is mostly used on heavy duty applications as the power steering pumps can put up 1000-1500psi and so give huge power assist.
FireWarrior, why do you need power steering while stationary with brakes applied. If it is not leaking and is good at all other times why not drive on?
One thing you could try is to drain the fluid and replace with new (provided it is not leaking).
 
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