Replacing PS pressure hose.

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May 7, 2001 | 08:36 AM

RGAZ

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Replacing PS pressure hose.

RE: 88 F-150 4x4 302 w/AC 5speed

Well, I found my mess maker. The PS pressure hose split right at the fitting that goes into the steering box.

I have the replacement hose and I have moved the idle kick-up switch to the new hose.

The instructions (here is the root of the problem) says I need to open the return line, run the engine and bleed the fluid all out before replacing. This will potentially make one hell of a mess and I don't want to do it. Especially since all the fluid in the system is new now (that's how I found the leak).

My question is this: Does the PS system self-prime? If I repalce the pressure hose and run the pump will it push all the air out of the system? Do I have to "bleed" the PS system?

Thanks for responses.

Randy

May 7, 2001 | 09:59 AM

PAUL_2

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Replacing PS pressure hose.

The air will eventually be pumped out , What you can do once the new hose is installed is fill the resevoir , raise the front wheels just enough to clear the ground , start the engine & turn the wheel from full left to full right adding fluid as needed until the air is expelled , just repeat this until the pump quiets down & the air is out . It should only take maybe 5 or 6 full turns to get all the air out .

May 7, 2001 | 12:41 PM

lanero

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Joined: Feb 2000

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From: South Sioux City, NE USA

Replacing PS pressure hose.

I've got a question about the idle kick-up switch. Where is it located in the line? My truck ('89 F250) seems to be missing that swith and I don't see where it is supposed to go.

Thanks.

Roger Lane
Test Analyst
Sr. Automated Test Engineer
IBP, Inc.

May 7, 2001 | 01:16 PM

RGAZ

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Replacing PS pressure hose.

On mine: (88 f150 302 5speed w/ ac) it is actually on the hose itself.

If you look at the top of the steering box, there are two hoses connected to it. The one closer to the front of the truck is the pressure hose and the further back one is the return.

On the pressure hose, there is a u-bend then a conversion from metal pipe to flexible hose. At that conversion point there is what looks like a tee with an electrical connector coming out of it (2 pin). That is the idle kick-up switch.

It threads into the tee and has a single rubber o-ring.

Randy

May 7, 2001 | 11:24 PM

79supercab4x4

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Replacing PS pressure hose.

May 8, 2001 | 10:31 PM

mrlaserboy

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From: St. Paul, MN

Replacing PS pressure hose.

A bit of extra info- only the 5.0L equipped trucks had the PSPS (power steering pressure switch) in the system.

Dustin Siebert
mrlaserboy(No Email Addresses In Posts!)
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May 9, 2001 | 08:20 AM

lanero

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Joined: Feb 2000

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From: South Sioux City, NE USA

Replacing PS pressure hose.

Thanks for the Info. When I checked my truck, it looks like the hose was replaced with the wrong one. It does not have the conneter, maybe someone used a hose from a 351 equippped truck.
If I get a chance next week, I'll check the salvage yards and see if I can find the proper hose.

Roger Lane
Test Analyst
Sr. Automated Test Engineer
IBP, Inc.