apart since it was leaking (I know big surprise) my question is I know seal kits are elusive and $$$ but I'm just looking for the seal on either side of the main body.
Bendix Power Assist
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Cargo Master
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Bendix Power Assist
So I took my bendix pump apart since it was leaking (I know big surprise) my question is I know seal kits are elusive and $$$ but I'm just looking for the seal on either side of the main body... is that the elusive seal nobody can get? If so can't I just get some gasket paper and make a new seal myself? I marked the picture with the seal location I'm looking for
Ford Parts Specialist
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From: Simi Valley, CA
And, are you sure your 1974 F250 4WD has Bendix P/S?
Garrison Power Assist P/S: 1973 F250 4WD; 1974 F250 4WD before serial number T80,001.
Bendix P/S: 1974 F250 4WD from serial number T80,001, 1975/77 F250 4WD
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Cargo Master
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Yes sorry I know it's power assist, I just get used to typing power steering into google to find search results. Yes that is the box on the side of my truck. Here's a pic of the main body (currently taken apart and off my truck) and one partial pic of it while it's on.
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From: O-O-O-Oreilly's
There is no seal that goes on either end of the main body. All the sealing is done by the spool seals and the small pistol below the spool. Theoretically, there should never be fluid getting past the spool seals, thus nullifying the need for seals on either end of the body. That's why when you see one of those control valves with RTV in that area, an unknowing mechanic tried to seal off a problem that can be traced to the internal seals of the unit.
Postmaster
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From: O-O-O-Oreilly's
Also, when looking for seals and rebuild kits, speak to Randy, of stangerssite.com. He's a very nice feller and even sent me extra seals for free when I messed up mine due to improper installation.
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Cargo Master
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Originally Posted by MyFordTrucks
I can't help fix your part but I used this to convert my truck to manual steering. I'm very happy with it. Some good deals on used ones also.
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Cargo Master
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Originally Posted by mountain dewd
There is no seal that goes on either end of the main body. All the sealing is done by the spool seals and the small pistol below the spool. Theoretically, there should never be fluid getting past the spool seals, thus nullifying the need for seals on either end of the body. That's why when you see one of those control valves with RTV in that area, an unknowing mechanic tried to seal off a problem that can be traced to the internal seals of the unit.
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Postmaster
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From: O-O-O-Oreilly's
So my first pic you can see my trial seals in white, one goes on the surface you see in the pic and that I marked in the first... so there shouldn't be any seals there? Well dang then yes I've definitely got a leak somewhere else because it's coming out from that space
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Cargo Master
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I did notice when taking the pump apart, the pieces I marked in blue aren't quite the same. I don't have the circle gaskets/washers? And my springs are big enough to slide over the center piece. Sorry if this seems rambly or jumbled. I'm still new to this era of truck and all it's technology.
Edit* I added pics of mine
Edit* I added pics of mine
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Cargo Master
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Originally Posted by mountain dewd
Yep... no seals there. look at your spool seals. They must be supple to expand and seal properly. Yours are likely hardened up and not doing that anymore. You can spin them in a drill and cut a groove for an O ring in them, and they will work very well. I have homespun seals in mine and it has been absolutely leak free for almost 2 years so far.
Also ND here is a pic of me just holding it on the truck as to show the whole device also you can see a pretty decent homemade (hindsight) seal that lead me to believe there were originally seals here.
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3A730 is the complete control valve, some parts were only furnished with it.
Parts with arrows and black square also available in 3A650 control valve repair kit.
Parts with arrows and % supplied in 3A675 control valve spring centering kit.
Parts with arrows and black square also available in 3A650 control valve repair kit.
Parts with arrows and % supplied in 3A675 control valve spring centering kit.
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Cargo Master
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Originally Posted by NumberDummy
3A730 is the complete control valve, some parts were only furnished with it.
Parts with arrows and black square also available in 3A650 control valve repair kit.
Parts with arrows and % supplied in 3A675 control valve spring centering kit.
Parts with arrows and black square also available in 3A650 control valve repair kit.
Parts with arrows and % supplied in 3A675 control valve spring centering kit.
Also is it ok that my end caps are smooth with no protrusion unlike the diagram?
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Cargo Master
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Well I stumbled upon a second bendix valve I acquired from grinnergetter and I'm taking it apart. I took apart that bottom section of springs and valves. However I can't get all the pieces out. Any suggestions? A bolt and small sledge hasn't don't any good but to dent the one cap. It's STUCK. Any advice would be appreciated. I plan to clean the new valve and internals and swap that into my truck and hope it doesn't leak; or at least not as bad as before.
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