I made some mistakes while measuring shims the first time. I was using
a dial gauge with a magnetic holder set up on the flat part of my bench
vise to measure differences in thickness between the original shim and
the new ones. I forgot to consider the angle of the dial gauge relative
to the work.
I sat down with a piece of paper and wrote down everything I knew (which
didn't take long 8-)) and everything I had done. Then I calibrated the
dial gauge using feeler gauges. I came up with a set of readings of the
dial gauge for various feeler gauge thicknesses that I could use for
linear interpolation to find the actual thickness of my shims. In the
process, I learned that one of my feeler gauges was wrong by several
thousandths. Whew! Life's tough without a micrometer!
I decided, based on what I'd seen in the ring gear contact patterns,
that I needed a shim thinner than the first two I tried (which were
within a couple of thousandths of each other), and thicker than the last
one (which was seven thousandths thinner). I settled on a shim
thirty-five thousandths thinner than the original, and installed it.
I was satisfied with the result, so I went ahead and completed the
assembly with that shim. I've finished painting the housing, and almost
finished installing it. I just need to get some new wheel bearings and
seals and set the axle end-play, then install the brakes.
I'll try to send a complete report to the group after I'm finished, and
after I've recovered physically. (It's pretty hard work for a
middle-aged desk jockey.)
Lee
-----Original Message-----
From: Dave Cole <DA_Cole@compuserve.com>
To: Lee Ethridge <leeethridge@ibm.net>; MV List <mil-veh@skylee.com>
Date: Wednesday, January 21, 1998 8:00 AM
Subject: Re: [MV] Ring gear and pinion contact pattern questions
Message text written by "Lee Ethridge"
>$40 might have been reasonable if, as you say, they had pressed all the
bearings and races into the pinion and housing. (Oh, yeah. My wording
was wrong. I meant the differential carrier when I said "housing".)
They pressed three cones. It took about a minute and a half of shop
time.<
Ohh...
That's not exactly cheap, I thought you meant that they pressed the
races
into the axle housing also.
Yep, I'd find a new shim. You could cut one from some shim stock, but
buying one would sure be easier.
Good Luck,
Dave
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