| Re: [GMCnet] Bogie Pins & Bushings [message #248223 is a reply to message #248216] |
Tue, 22 April 2014 20:30  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma:
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Senior Member |
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Ron,
Believe me, those photos don't begin to show how bad it CAN be:
Some of the brackets are worn elliptical on the frame side, in which case
major machine shop operation might be required to save the bracket before
installing new pins.
The shims between the frame and the bracket may be so rusted as to leave no
clue to the required replacements, so you'll have to learn to do the
by-the-book rear alignment -- something probably very few have done in the
past 20 years.
Don't try to do it without a guided reamer. When I did my pins at the Coop
in '98, JimB had just acquired a reamer and had not yet begun to do that
work. The reamer would only do one side of the bracket at a time. I wound
up with nicely reamed bushings but the pins would only go 1/2 way through
the bracket. Not only that, the pins were extremely roughly finished,
apparently some of a batch that Alex Sirum admitted to me many years later
got through him without having been ground and polished. That combination
resulted in the pins being VERY tight when installed. They eventually wore
in, but I did have some complications along the way.
While it's not a recommended solution, I no longer worry about what's
probably excessive play in my bushings: The True-Tracks I installed
several years back (and replaced with the Manny Brake exact equivalents)
seem to make it a non-issue. I think they'll outlast me if I keep greasing
them every few thousand miles with Synpower.
It WOULD be cheaper to install track guides than to install new pins. It
might even be cheaper to install Manny Brakes with the optional track
guides than to install new pins. IF that would be a satisfactory solution.
JWID,
Ken H.
On Tue, Apr 22, 2014 at 7:33 PM, wrote:
>
> Thanks to all who responded.
> Jim Hupy said they were pretty sloppy, so I guess I'd better get it done
> pretty soon.
>
> RonC
>
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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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