Re: A/C M100 motor grader
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Posted by Lee Bradley on November 19, 1998 at 22:48:31:
In Reply to: A/C M100 motor grader posted by Gerald Turner on November 18, 1998 at 18:11:59:
: I need advise on how to remove rear wheel hubs in order to repair brakes While this isn't about an AC grader most of the big graders are similar. The following
is a short piece I copied from Mr. Robert VanNatta's web page. Mr. VanNatta is from a
long time logging family in NW Oregon and has very interesting and informative site at
http://www.aone.com/~robert/homepage.html My thanks to Mr. VanNatta for his work in creating his site for our enjoyment and
hoping he doesn't mind my sharing his work. Lee Bradley As with any machine, though, repairing the Champion takes some special tools and
determination. The brakes are 4-wheel hydraulic with a power assist. The wheels are spoke
wheels that attach with clips. The rear hub is a once piece unit which comprises the brake
drum and hub. It is on a tapered and keyed spindle. To service the brakes you have to pull
the hub which is not easy task. I've been there, done it. The 3 -9/16" spindle nut seems to
respond well to a 1-1/2" drive impact wrench or a double compound (Multiple planetary
reducers are stacked on one another allowing a 200 lbs man with a 3 foot wrench to emulate
the force of a 12-15 foot long wrench). The hub, itself has a couple 1' puller bolt holes to
which you fasten your handy andy 100 ton portapower and pull. Be sure and use quality
bolts, because soft bolts won't hold these kind of stresses. My experience with soft bolts is
that at around 40-50 tons they began to stretch and fail. Being more sophisticated the
second time around, I used a par of grade 5 bolts (3 strikes on the head) and these proved
sufficient though the hub came loose and something less than maximum effort with the 100
ton jack. We actually got it, at around 60 tons of force with a sledge hammer assistance.
Once the brake drum is pulled the brake repair is very familiar--a couple brake shoes, some
springs, and a single 1 - 1/4" wheel cylinder.
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