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| [GMCnet] PS Pump Leaks [message #326495] |
Wed, 29 November 2017 18:58  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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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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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] PS Pump Leaks [message #326500 is a reply to message #326495] |
Wed, 29 November 2017 20:26  |
Kingsley Coach
Messages: 2691
Registered: March 2009
Location: Nova Scotia Canada
Karma: -34
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Senior Member |
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Ahhh, Ken
"Shortly to be disabled for a while..." Have I not been keeping up or did
this little item slip your mind??
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.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
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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| 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: 2
|
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.
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
>
> --
> 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 !
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
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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| Re: [GMCnet] PS Pump Leaks [message #326516 is a reply to message #326504] |
Wed, 29 November 2017 23:17 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
|
Senior Member |
|
|
Ken,
Your running a Cad500 engine so the pump is slightly different from the 455.
On Wed, Nov 29, 2017 at 6:41 PM, gene Fisher wrote:
> 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.
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>>
>>
>>
>> --
>> 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 !
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> --
> 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
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] PS Pump Leaks [message #326547 is a reply to message #326526] |
Thu, 30 November 2017 14:35 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
|
Senior Member |
|
|
Just shows that I have not been under it in a long time.
You scared me when I saw a comment saying Disabled.
Glad it is not serious.
On Thu, Nov 30, 2017 at 5:27 AM, Ken Henderson
wrote:
> Nope, the pump is the same -- just the mount's different. And maybe the
> reservoir, but I modified it anyway.
>
> Ken H.
>
> On Thu, Nov 30, 2017 at 12:17 AM, Jim Kanomata
> wrote:
>
>> Ken,
>> Your running a Cad500 engine so the pump is slightly different from the
>> 455.
>>
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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