Home » Public Forums » GMCnet » [GMCnet] PS Pump Leaks
| Re: [GMCnet] PS Pump Leaks [message #326504 is a reply to message #326500] |
Wed, 29 November 2017 20:41   |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma:
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Senior Member |
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On Wed, Nov 29, 2017 at 6:26 PM Kingsley Coach
wrote:
> Ahhh, Ken
>
> "Shortly to be disabled for a while..." Have I not been keeping up or did
> this little item slip your mind??
>
What is this ???
>
> Mike
>
> On Wed, Nov 29, 2017 at 8:58 PM, Ken Henderson
> wrote:
>
>> For months, I've been plagued by Power Steering Pump leaks. Every time I
>> get back on the rack, the bottom of the PSP, its 3 hoses, the front
>> crossmember and everything below it was covered with PS fluid.
>>
>> Since I'll shortly be disabled for a while, I decided yesterday that I'd
>> fix it. Had a heck of a time getting the thing off. I'd re-tightened
> the
>> big nut on the back and teh outlet hose that connects to it so many
> times,
>> and so tightly, that I litterally could not get them loose. The big nut
> is
>> so thing that the 1" open end wrench on it prevented the 5/8" flare nut
>> wrench from getting a good grip. Plus, I couldn't get the room to extend
>> the flare wrench for leverage.
>>
>> I finally had to disconnect the two return hoses (1 for PS, the other for
>> Hydroboost) and lower the PSP onto the front cross member. There, I was
>> finally able to use the 1" wrench and the wonderful flare nut Vice-Grips
>> (THANKS Matt) to get a good grip on things. WIth a piece of pipe on the
>> Vice-Grips, I was finally able to break the joint loose and remove the
>> PSP. Probably didn't spill over a pint of fluid during the whole
>> exercise. :-(
>>
>> As soon as I got the reservoir off (a simple matter, after the bolts are
>> all removed, of tapping around the pulley side with a plastic hammer), I
>> saw the problem: There are 3 O-rings sealing two 3/8" bolts and the one
>> outlet fitting nut. They fit into recesses in the body of the pump, with
>> the sheet metal reservoir rear surface pressed against them by the
>> fasteners. That's ALL that prevents leaks from back there. All 3
> O-rings
>> were badly mangled, misaligned so badly that they were squooshed outside
> of
>> their recesses. The BIG O-ring between the mail pump body and the
>> reservoir's round housing, was in great shape.
>>
>> All 3 of the fastener holes in the back of the reservoir were badly
>> dimpled, probably because I'd tried at some time to fix leaks by
>> overtightening them. So, using a very smooth anvil and a smooth ball
> pein,
>> I smoothed the areas around the holes.
>>
>> I finally found the proper sized O-rings in my box. This time, for the
>> first time ever, I used my head a little bit in reinstalling the
>> reservoir: Usually, I just aim it in the right direction, then shove and
>> drive it home. When the holes don't quite line up, I just twist the
>> reservoir until they do. THAT is probably what caused the damaged
>> O-rings. This time, I used a couple of 3/8"-16x3" studs, made from
>> all-thread, in the two bolt holes as guides for the reservoir as I
>> installed it. When I removed the studs, there was no need to rotate the
>> housing and dislodge the O-rings.
>>
>> With everything bolted back up, re-installed, and re-filled, I jacked the
>> front wheels off the ground and fired up the engine. After a few full
> lock
>> L & R turns of the steering wheel, the boost had obviously returned.
> AND,
>> my Hydroboosted hydraulic line pressure increased by a couple of hundred
>> psi. I'm not sure why, because all air should have been evacuated during
>> the past 20,000+ miles, but it did.
>>
>> After a couple of engine runs, and sitting overnight, today the reservoir
>> and surroundings are still dry. Y'All keep your fingers crossed that
> I've
>> finally licked this one. Even if I haven't cured the AFT leak. :-(
>>
>> Ken H.
>> _______________________________________________
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>>
>
>
>
> --
> Michael Beaton
> 1977 Kingsley 26-11
> 1977 Eleganza II 26-3
> Antigonish, NS
>
> Life is too short to hold a grudge; slash some tires and call it even !
> _______________________________________________
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>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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