| Hydraulic wipers [message #336563] |
Fri, 31 August 2018 14:16  |
FastEddie313
Messages: 2
Registered: August 2018
Karma: 0
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Junior Member |
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Hi!
I have been having a bit of trouble finding any information on my hydraulic wiper system. I have a 1981 Holiday Rambler Imperial 33 and I think it has the same or similar hydraulic wiper motor setup as your GMC motorhomes..
It has a slide switch on the dash that works a cable that goes to the wiper motor. I unfroze the cable and linkage and got it moving..
The thing is that the motor just doesn't seem to put out near enough power/torque..
If I take the wiper levers off the motor the motor turns and stuff but it doesn't put out enough power to run the wipers.. Or if I give the wipers a bit of help manually they will go a bit but don't have enough power on their own..
I think I read something about an inline filter?
The power steering pump also runs the power steering and power breaks, hydraulic boost breaks.
Both the power steering and breaks put out good power, to the point to where they will make the power steering belt slip if you really step on the break or try to turn the front wheels sitting still..
Yeah I know I need to tighten the belt. I haven't gotten around to that yet, but the wipers don't make the belt slip or seem to draw much power from the pump at all..
Any help diagnosing this would be excellent..
If this machine is to ever tour again it is going to need functioning wipers..
I'm not looking to convert to electric yet, I would rather figure out the hydraulic system and see if I can make it work first..
Thanks guys!
[Updated on: Fri, 31 August 2018 14:17] Report message to a moderator |
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| Re: Hydraulic wipers [message #336565 is a reply to message #336563] |
Fri, 31 August 2018 15:04  |
bwevers
Messages: 597
Registered: October 2010
Location: San Jose
Karma: 5
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Senior Member |
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The filter on the hydraulic hose going to my wiper system was clogged.
I took it out. Now the wipers have more power.
I also changed the power steering fluid.
Bill Wevers GMC49ers, GMC Western States
1975 Glenbrook - Manny Powerdrive, OneTon
455 F Block, G heads
San Jose
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| Re: Hydraulic wipers [message #336567 is a reply to message #336563] |
Fri, 31 August 2018 15:48 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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Sir, on the GMC the filter is bolted inline to the wiper motor and looks like a 3" pipe nipple. It has stainless wire mesh in it and can be cleaned by removing and using solvent and shop air.
http://www.gmcmhphotos.com/photos/gmces-dillard-2c-ga-rally-2011/p38077-2-chiefs-and-1-indian.html
FastEddie313 wrote on Fri, 31 August 2018 15:16Hi!
I have been having a bit of trouble finding any information on my hydraulic wiper system. I have a 1981 Holiday Rambler Imperial 33 and I think it has the same or similar hydraulic wiper motor setup as your GMC motorhomes..
It has a slide switch on the dash that works a cable that goes to the wiper motor. I unfroze the cable and linkage and got it moving..
The thing is that the motor just doesn't seem to put out near enough power/torque..
If I take the wiper levers off the motor the motor turns and stuff but it doesn't put out enough power to run the wipers.. Or if I give the wipers a bit of help manually they will go a bit but don't have enough power on their own..
I think I read something about an inline filter?
The power steering pump also runs the power steering and power breaks, hydraulic boost breaks.
Both the power steering and breaks put out good power, to the point to where they will make the power steering belt slip if you really step on the break or try to turn the front wheels sitting still..
Yeah I know I need to tighten the belt. I haven't gotten around to that yet, but the wipers don't make the belt slip or seem to draw much power from the pump at all..
Any help diagnosing this would be excellent..
If this machine is to ever tour again it is going to need functioning wipers..
I'm not looking to convert to electric yet, I would rather figure out the hydraulic system and see if I can make it work first..
Thanks guys!
C. Boyd
76 Crestmont
East Tennessee
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| Re: [GMCnet] Hydraulic wipers [message #336568 is a reply to message #336565] |
Fri, 31 August 2018 15:41 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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If you carefully clean the filter with contact cleaner, a fine wire brush
and compressed air you can get it perfectly clean.
Sully
Bellevue wa.
On Fri, Aug 31, 2018 at 1:04 PM Bill Wevers wrote:
> The filter on the hydraulic hose going to my wiper system was clogged.
> I took it out. Now the wipers have more power.
> I also changed the power steering fluid.
> --
> Bill Wevers GMC49ers, GMC Western States
> 1975 Glenbrook - Manny Powerdrive, OneTon
> 455 F Block, G heads
> San Jose
>
> _______________________________________________
> GMCnet mailing list
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: [GMCnet] Hydraulic wipers [message #336573 is a reply to message #336567] |
Fri, 31 August 2018 17:48 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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You never wat to run w/o a filter.
THrowing it away is a temerary fix and will come back to bite you.
On Fri, Aug 31, 2018 at 2:04 PM Charles Boyd
wrote:
> Sir, on the GMC the filter is bolted inline to the wiper motor and looks
> like a 3" pipe nipple. It has stainless wire mesh in it and can be cleaned
> by
> removing and using solvent and shop air.
>
> http://www.gmcmhphotos.com/photos/gmces-dillard-2c-ga-rally-2011/p38077-2-chiefs-and-1-indian.html
>
>
>
>
> FastEddie313 wrote on Fri, 31 August 2018 15:16
>> Hi!
>> I have been having a bit of trouble finding any information on my
> hydraulic wiper system. I have a 1981 Holiday Rambler Imperial 33 and I
> think it
>> has the same or similar hydraulic wiper motor setup as your GMC
> motorhomes..
>>
>> It has a slide switch on the dash that works a cable that goes to the
> wiper motor. I unfroze the cable and linkage and got it moving..
>> The thing is that the motor just doesn't seem to put out near enough
> power/torque..
>>
>> If I take the wiper levers off the motor the motor turns and stuff but
> it doesn't put out enough power to run the wipers.. Or if I give the wipers
>> a bit of help manually they will go a bit but don't have enough power on
> their own..
>>
>> I think I read something about an inline filter?
>>
>> The power steering pump also runs the power steering and power breaks,
> hydraulic boost breaks.
>> Both the power steering and breaks put out good power, to the point to
> where they will make the power steering belt slip if you really step on the
>> break or try to turn the front wheels sitting still..
>>
>> Yeah I know I need to tighten the belt. I haven't gotten around to that
> yet, but the wipers don't make the belt slip or seem to draw much power
>> from the pump at all..
>>
>> Any help diagnosing this would be excellent..
>> If this machine is to ever tour again it is going to need functioning
> wipers..
>>
>> I'm not looking to convert to electric yet, I would rather figure out
> the hydraulic system and see if I can make it work first..
>>
>> Thanks guys!
>
> --
> C. Boyd
> 76 Crestmont
> East Tennessee
>
> _______________________________________________
> 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] Hydraulic wipers [message #336576 is a reply to message #336573] |
Fri, 31 August 2018 21:02 |
powwerjon
Messages: 849
Registered: March 2013
Karma: -2
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Senior Member |
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I am with Jim K. on never running without a filter on the power steering system and the hydraulic wipers. Even with electric wipers installed you should still run a filter on the power steering system. The OEM filter assy can be taken apart and cleaned and reused. There are several canister type filter that can be used instead of the OEM filter. I also run a cooler in the return line back to the pump. I use filters harvested out of late model Cadilac’s.
The following filter are available for use:
AutoZone Part# 70702 Alternate Part# 20-P038F
Napa used to sell a filter under part# NSP20FTL3, but it does not appear to be in their catalog, but your local counterman may be able to find it.
O’Reilly under part# 991FTL2 and 991FTL3 search under power Steering filter and not part number
All these filters are in the $20 to $25 dollar range.
The go to filter used to be the AC PF-833 filter, but that is not readably available unless it sometime appears as NOS on Ebay.
J.R. Wright
GMC Great Laker MHC
GMCGL Tech Editor
GMC Eastern States Charter Member
GMCMI
78 GMC Buskirk 30’ Stretch
75 GMC Avion (Under Reconstruction)
Michigan
> On Aug 31, 2018, at 6:48 PM, Jim Kanomata wrote:
>
> You never wat to run w/o a filter.
> THrowing it away is a temerary fix and will come back to bite you.
>
>
> On Fri, Aug 31, 2018 at 2:04 PM Charles Boyd
> wrote:
>
>> Sir, on the GMC the filter is bolted inline to the wiper motor and looks
>> like a 3" pipe nipple. It has stainless wire mesh in it and can be cleaned
>> by
>> removing and using solvent and shop air.
>>
>> http://www.gmcmhphotos.com/photos/gmces-dillard-2c-ga-rally-2011/p38077-2-chiefs-and-1-indian.html
>>
>>
>>
>>
>> FastEddie313 wrote on Fri, 31 August 2018 15:16
>>> Hi!
>>> I have been having a bit of trouble finding any information on my
>> hydraulic wiper system. I have a 1981 Holiday Rambler Imperial 33 and I
>> think it
>>> has the same or similar hydraulic wiper motor setup as your GMC
>> motorhomes..
>>>
>>> It has a slide switch on the dash that works a cable that goes to the
>> wiper motor. I unfroze the cable and linkage and got it moving..
>>> The thing is that the motor just doesn't seem to put out near enough
>> power/torque..
>>>
>>> If I take the wiper levers off the motor the motor turns and stuff but
>> it doesn't put out enough power to run the wipers.. Or if I give the wipers
>>> a bit of help manually they will go a bit but don't have enough power on
>> their own..
>>>
>>> I think I read something about an inline filter?
>>>
>>> The power steering pump also runs the power steering and power breaks,
>> hydraulic boost breaks.
>>> Both the power steering and breaks put out good power, to the point to
>> where they will make the power steering belt slip if you really step on the
>>> break or try to turn the front wheels sitting still..
>>>
>>> Yeah I know I need to tighten the belt. I haven't gotten around to that
>> yet, but the wipers don't make the belt slip or seem to draw much power
>>> from the pump at all..
>>>
>>> Any help diagnosing this would be excellent..
>>> If this machine is to ever tour again it is going to need functioning
>> wipers..
>>>
>>> I'm not looking to convert to electric yet, I would rather figure out
>> the hydraulic system and see if I can make it work first..
>>>
>>> Thanks guys!
>>
>> --
>> C. Boyd
>> 76 Crestmont
>> East Tennessee
>>
>> _______________________________________________
>> 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
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| Re: [GMCnet] Hydraulic wipers [message #336587 is a reply to message #336585] |
Sat, 01 September 2018 07:05 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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It is the piece of 3" brass between the connection and the wiper motor. I did forget to say to replace the filter after cleaning. Why would you take it off, clean it, then not put it back on. My bad for under estimating my own stupidity.
FastEddie313 wrote on Sat, 01 September 2018 02:17In this picture here.. http://www.gmcmhphotos.com/photos/showfull.php?photo=38077
Is it the little connection in the middle of the hose right infront of his hand?
thank you for the replies guys. I appreciate it..
I will check and see if their is a filter in my high pressure line between the pump and wiper motor..
C. Boyd
76 Crestmont
East Tennessee
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