| Isolation pads [message #312570] |
Sat, 28 January 2017 21:24  |
Atom Ant
Messages: 170
Registered: October 2016
Location: Austin, TX
Karma: 0
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I've read a number of articles on replacing body pads.
One question-do I need to undo the u bolts or no? I tried to lift the body with a bottle jack and it simply lifted the coach. What am I missing?
1976 Palm Beach
Austin, TX
[Updated on: Sat, 28 January 2017 21:51] Report message to a moderator |
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| Re: Isolation pads [message #312571 is a reply to message #312570] |
Sat, 28 January 2017 22:45  |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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I have done it both ways. On the one that I had to loosen the bolts, I loosened and removed only one of the horizontal bolts holding the bracket on the frame. I left the second one loosened but still installed. Then after replacing the pads. I use a long locating pin as a pry bar to force bracket back into position so the holes lined up. I tightened the already installed bolt. Then we inserted the removed bolt back into the hole where the tool was.
The only reason that I had to do all of the above was I removed a thin strip and was installing thick pads. On my own coach I already had thick pads so it was not necessary to loosen the hold downs bolts.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Isolation pads [message #312572 is a reply to message #312570] |
Sat, 28 January 2017 22:47 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Adam,
I'm not sure what you mean by "i bolts", but I assume you're talking about
those "carriage bolts" holding the clamps around the rubber bushings at the
sides of the frame. When I replaced the pads on my '76 Birchaven, I did as
you state you did: Lifted the body, which in turn lifted the chassis.
Since I'd well-soaked the bolts with penetrating oil, they their nuts then
came off easily. The purpose of lifting the body was a successful attempt
to inhibit turning of the carriage bolts -- I had no trouble with any of
them. And IIRC, I didn't even use an impact wrench, as would probably have
been best.
Good luck. Let us know how it works out.
Oh yeah: If I'd had trouble with any of the bolts and their heads had been
in inaccessible locations, I'd have either gripped their bottom ends with
lock-grips, slotted them with a grinding wheel for a screwdriver, or cut
the nuts off with a nut-cracker (which I think I'd bought for that purpose
but have never used).
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI & EBL,
Manny Brakes & 1-Ton, etc., etc., etc.
www.gmcwipersetc.com
On Sat, Jan 28, 2017 at 10:24 PM, Adam Metzger
wrote:
> I've read a number of articles on replacing body pads.
>
> One question-do I need to undo the i bolts or no? I tried to lift the
> body with a bottle jack and it simply lifted the coach. What am I missing?
> --
> 1976 Palm Beach
> Austin, TX
>
> _______________________________________________
> GMCnet mailing list
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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: Isolation pads [message #312577 is a reply to message #312570] |
Sun, 29 January 2017 11:42 |
Scott Nutter
Messages: 782
Registered: January 2015
Location: Houston/San Diego
Karma: 4
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Would anyone have a time estimate for replacing all pads with average tools and average experience? One man job?
Thanks.
Scott Nutter
1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, Dave Lenzi super duty mid axle disc brakes, tankless water heater, everything Lenzi. Alex Ferrera installed MSD Atomic EFI
Houston, Texas
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| Re: Isolation pads [message #312590 is a reply to message #312577] |
Sun, 29 January 2017 14:00 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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On mine where I did not disconnect or loosen the hold downs I spent about 5 hours on the right side with the exhaust pipe. On the other side I spent about 2.5 hours the next day. If you get the jack placed correctly on the aluminum cross piece, you can jack up the body and simply replace it. Sometimes jacking on one will actually lift enough area to do two or three of them at a time.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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