| [GMCnet] Wobble in the Power Steering Pulley [message #275842] |
Tue, 14 April 2015 00:38  |
W R WARN
Messages: 4
Registered: April 2015
Karma: 0
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The power steering seems to be doing fine, but the pulley has a slight wobble at idle - clears up as the RPMs go up. From underneath, by hand, I can get a slight side to side movement on the pulley. Also, the alternator belt looks like it might be turned in a degree or two coming up from the pump which in turn implies to me the pump pulley is not aligned. Is this a common condition that just needs to be watched? Or is there an adjustment I can make? The manual doesn't seem to address this sort of issue.
Thanks for your help.
Jim Pond76 Eleganza 455 3.07
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| Re: [GMCnet] Wobble in the Power Steering Pulley [message #275845 is a reply to message #275842] |
Tue, 14 April 2015 07:00  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Jim,
If you can move the pulley side to side, your problem is more than visual.
It's loose on the shaft and the condition will inevitably get worse,
probably catastrophically. You need to try to tighten the pulley and if
that's not possible, replace the pump.
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI & EBL,
Manny Brakes & 1-Ton, etc., etc.
www.gmcwipersetc.com
On Tue, Apr 14, 2015 at 1:38 AM, W R WARN wrote:
> The power steering seems to be doing fine, but the pulley has a slight
> wobble at idle - clears up as the RPMs go up. From underneath, by hand, I
> can get a slight side to side movement on the pulley. Also, the alternator
> belt looks like it might be turned in a degree or two coming up from the
> pump which in turn implies to me the pump pulley is not aligned. Is this a
> common condition that just needs to be watched? Or is there an adjustment
> I can make? The manual doesn't seem to address this sort of issue.
> Thanks for your help.
> Jim Pond76 Eleganza 455 3.07
>
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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] Wobble in the Power Steering Pulley [message #275858 is a reply to message #275845] |
Tue, 14 April 2015 08:57 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Ken,
That pulley is pressed on to the pump shaft (ref. MM-X-7525 / Section 9 - Steering / Page 9-15 / Figure 8 - Pulley Removal - Special
Tool J-25034 so if it is "wobbling" I would suggest that Jim remove the belt and try to move the pulley. I checked Parts Book 78Z /
Section 16 - Steering / Page 16-20 / Figure 16.060 Pump - Hydraulic Power Steering
Key 14 - KIT - ret. ring and drive shaft & Key 22 - Housing Assy
It appears that the shaft runs directly on a bore in the housing, there are no bearings. If the pulley wobbles when Jim tries to
move it I would suspect that the shaft or housing are worn.
Regards,
Rob M.
The Pedantic Mechanic
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Ken Henderson
Sent: Tuesday, April 14, 2015 10:01 PM
To: gmclist
Subject: Re: [GMCnet] Wobble in the Power Steering Pulley
Jim,
If you can move the pulley side to side, your problem is more than visual.
It's loose on the shaft and the condition will inevitably get worse,
probably catastrophically. You need to try to tighten the pulley and if
that's not possible, replace the pump.
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI & EBL,
Manny Brakes & 1-Ton, etc., etc.
www.gmcwipersetc.com
On Tue, Apr 14, 2015 at 1:38 AM, W R WARN wrote:
> The power steering seems to be doing fine, but the pulley has a slight
> wobble at idle - clears up as the RPMs go up. From underneath, by hand, I
> can get a slight side to side movement on the pulley. Also, the alternator
> belt looks like it might be turned in a degree or two coming up from the
> pump which in turn implies to me the pump pulley is not aligned. Is this a
> common condition that just needs to be watched? Or is there an adjustment
> I can make? The manual doesn't seem to address this sort of issue.
> Thanks for your help.
> Jim Pond76 Eleganza 455 3.07
>
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Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Wobble in the Power Steering Pulley [message #275863 is a reply to message #275842] |
Tue, 14 April 2015 09:23 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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Mine does also, I noticed when setting the remaining belts up to get home recently. I have the correct belts on order. A cursory look indicates the spacer which gets the pump pulley aligned may be missing, which cocks the pump and increases the side load on the front bushing. Fortunately, the pulley is large enough to get a straightedge on it upon reinstallation and ensuring everything is on the same plane - and shimming as needed if it isn't. Which I will be doing.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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