bendix truck valve trouble

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Oct 9, 2012 | 10:01 PM

bubba_got_you

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bendix truck valve trouble

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oNotOptimizeForBrowser/> </w:WordDocument> </xml><![endif]--> Hey what’s up all?
First post here by me but I have lurked for a long time.
So here is my problem.
I have an assist steering system off a ford f250 and it has a ball and stud box style control valve on it and I took it off a truck and was smart enough to mark where the lines came off of but however in a stroke of genius I cleaned and painted the valve over my marks with out writing down where they go

. So now I am stuck because I don’t know what goes where anymore.

Is there anyone who can look at one or just happens to know what 2 holes on the valve go to the ram and what one is the presser and what is the return? Any help will be appreciated.
Thanks all.

Oct 9, 2012 | 11:19 PM

montana_highboy

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From: Big Sky Country

If you can't make heads or tails of this thread (link below) i'll check my truck tomorrow when it's daylight out and post back, until then this is the best i can do...

https://www.ford-trucks.com/forums/8...-pictures.html

Oct 10, 2012 | 11:58 AM

bubba_got_you

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Quote:

Originally Posted by montana_highboy

Thank you! I looked for hours for a thread like that.
So I have the lines hooked up correctly now but I am having what I seem to remember being a common problem but I don't know how to fix it. It will steer like a dream to the left but it feels like I am having to manually force the fluid out of the piston when turning right. Any ideas what I should do?

Oct 10, 2012 | 01:08 PM

montana_highboy

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From: Big Sky Country

Are you 100% sure the lines are hooked up correctly? particularly to the power cylinder?

(sitting in the truck)

front right port on control valve goes to front port on power cylinder

rear right port on control valve goes to rear port on power cylinder

Oct 10, 2012 | 04:35 PM

bubba_got_you

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Quote:

Originally Posted by montana_highboy

Yes I had the lines correct the problem was that the adjustment on in the valve was off and it was not letting the one line open.
Got it all fixed up now. Thanks for your help

Oct 10, 2012 | 05:05 PM

montana_highboy

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From: Big Sky Country

No problem...

If the spool valve isn't centered in the valve housing, fluid will not go around it evenly, this will cause the power assist to favor turning one way over the other.

Sounds like you got it adjusted correctly.

Dec 2, 2012 | 10:04 PM

Rons79F250

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Looks like I have the same problem, where could I find the spool valve and how can I adjust it? Sorry, pretty new to all this...

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Dec 4, 2012 | 12:10 AM

Rons79F250

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Anyone know where the adjustment screw is and how to set it?

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Dec 4, 2012 | 11:38 AM

#10

montana_highboy

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From: Big Sky Country

*Read your other thread first*

To access the adjustment nut the control valve needs to be tore down to the main valve body, the adjustment nut and spool valve bolt will be visible on either end of the housing.

If adjustment is deemed necessary it's simply a matter of tightening/loosening the nut to center the spool valve, once this adjustment is set there's nothing that can alter its position, other than a broken centering spring.

Dec 9, 2012 | 09:12 PM

#11

quickshift

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From: Ontario Canada

Also be careful not to over grease the unit as sometimes the grease works it's way into the spool and causes the steering to pull one way as the spool can't return fully to ctr.
BTDT.

Dec 10, 2012 | 09:58 AM

#12

montana_highboy

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From: Big Sky Country

Quote:

Originally Posted by quickshift

Also be careful not to over grease the unit as sometimes the grease works it's way into the spool and causes the steering to pull one way as the spool can't return fully to ctr.
BTDT.

Good point, the ball stud and bushing moves very little inside the sleeve so little lubrication is needed, since the ball stud area is fairly small, only a small amount of grease is needed to lubricate the pieces, usually no more than one or two pumps from a grease gun is all that is needed, a little goes a long way here.

If too much grease is pumped into the ball stud area, it can fill the unit to such an extent that the pieces inside cannot slide and move properly, when this happens the ball stud will not move like it should and actuate the control valve, usually this causes the steering not to provide power assist when turning in one direction.