| Power steering Pump Question [message #204110] |
Mon, 08 April 2013 20:30  |
gbarrow2
Messages: 765
Registered: February 2004
Location: Lake Almanor, Ca./ Red Bl...
Karma: 3
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Senior Member |
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My original question got overlooked and went unanswered in the discussion.
Three part numbers are listed for the various production years. Any one know what the differences are and why they were changed?
I assume the brackets are the same (at least on all 455's) and that any of the pumps can be properly mounted.
If one of the 3 pumps delivers more pressure than the others- that may solve my issue.
I have neither offset bushings nor extra ordinary caster so I don't think Jim Hupy's explanation applies in my case.
Any other ideas/suggestions?
Thanks for the input.
Gene Barrow
Lake Almanor, Ca.
1976 Palm Beach
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| Re: [GMCnet] Power steering Pump Question [message #204119 is a reply to message #204110] |
Mon, 08 April 2013 21:19  |
Kosier
Messages: 834
Registered: February 2008
Karma: 1
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Senior Member |
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Gene,
The internal parts are all the same. The early 70s pumps had a tapered
shaft with a retaining nut.
Later had a straight shaft with a press-on pulley. Some differences in
where the return line pointed.
only performance differences were the orifice size and number of shims in
the control valve.
They claim the Eldos with hydroboost had higher pressure, but I put one on
and no change, except
it stopped the leak.
Gary Kosier
77 PB with Caddy
-----Original Message-----
From: gene barrow
Sent: Monday, April 08, 2013 9:30 PM
To: gmclist@temp.gmcnet.org
Subject: [GMCnet] Power steering Pump Question
My original question got overlooked and went unanswered in the discussion.
Three part numbers are listed for the various production years. Any one know
what the differences are and why they were changed?
I assume the brackets are the same (at least on all 455's) and that any of
the pumps can be properly mounted.
If one of the 3 pumps delivers more pressure than the others- that may solve
my issue.
I have neither offset bushings nor extra ordinary caster so I don't think
Jim Hupy's explanation applies in my case.
Any other ideas/suggestions?
Thanks for the input.
--
Gene Barrow
Lake Almanor, Ca.
1976 Palm Beach
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