Power Steering Leak:
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Laughing Gas
Joined: Nov 2001
Posts: 968
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From: Cherryville,N.C.
Power Steering Leak:
I have a power steering pressure line leaking at the fitting that connects to the pump.I checked and made sure fitting is tight and still seeps fluid.Is there an o ring or teflon seal that is used at this connection?This is on a 1973 F-100 with 360 engine.
Cargo Master
Joined: Jun 2015
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Originally Posted by beartracks
Teflon tape if for pipe fitting not compression or flare etc.
On the pump side, the flare should be sealing as the threads are just there to hold it in place and not to help it seal. I've seen recommendations of lightly sanding the flare or using "little" thread paste on the either side. Not sure of any proper ways to stop a leak there.... are you sure it's tight enough? Definitely don't over tighten it tho
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"For leakage between the hose fitting nut and hose tube (View A, Fig. 3),
tighten the nut to 35 ft-lb torque. If leakage persists, replace the discharge
fitting and reface the hose tube flare or replace the hose as required."
"To stop leakage between the discharge fitting and the pump body (View A, Fig. 3),
tighten the fitting to 35 ft-lb torque. If leakage persists, replace both O-ring seals."
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First picture shows the saginaw pump style but this one's for the Ford-Thompson style pump. Not sure what setup you have but I'm guessing it's the Ford style since they seem to be more common, at least in my experience. Sameish setup though, no O-ring to be replaced on the pressure hose. If your leak is coming from behind the nut holding the reservoir on then there is an O-ring you can replace there. Picture below will show what I'm talking about
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Fleet Mechanic
Joined: Aug 2004
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From: Nevada
Hose
Wouldn't surprise me if you have some kind of hose chaffing or pin hole at the fitting, take a good look at it..... If that is the case finding the correct replacement hose can be a challenge (with the correct fittings), I recommend having one built at the local hose shop....
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Both 2wd and 4wd hoses have the same fittings but the 4wd hose is longer and has 2 rubber sections. Either way one, gearbox end is 5/16" male inverted flare and the pump end is 3/8" female S.A.E. If you get one made you'll need a male tube nut that's 1/2" x 20 thread for the gearbox and a female tube nut that's 5/8" x 18 thread for the pump.
Or just get a new one since they're cheap
4WD Pressure line:
Carquest part numer: 35538
2WD Pressure line:
Carquest part number: 35503
Or just get a new one since they're cheap
4WD Pressure line:
Carquest part numer: 35538
2WD Pressure line:
Carquest part number: 35503
Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
but I'm guessing it's the Ford style since they seem to be more common, at least in my experience.
Parts catalog pic: F100/350 Ford/Thompson "pencil neck" P/S pump. It has a steel reservoir, the P/S pressure hose threads onto the pump.
Note: Caption is wrong, should read 1973/74 E100/300 & 1973/77 F100/350.
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