Why are the bushings on some A-arms serrated? Here is a pic of what I’m talking about?
Won’t it chew up the mounting bracket?
A-arm bushings, why are the bushing serrated?
Moderator: Kurt Lesser
- kserumgard
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A-arm bushings, why are the bushing serrated?
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Kirk Serumgard
AT3 US Navy, 1990-1996
1lt US Army 352 CSH, 2009-2012
Hummer H1/HMMWV 1994 6bt cummins conversion
AT3 US Navy, 1990-1996
1lt US Army 352 CSH, 2009-2012
Hummer H1/HMMWV 1994 6bt cummins conversion
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Re: A-arm bushings, why are the bushing serrated?
I believe it's because when the through bolt and nut are tightened, the teeth grip, and the sleeve will twist in the rubber so there is no wear between the bolt and inner sleeve which is not lubricated. When I was doing the camber adjustment on my M1123, I noticed one of my top control arm through bolts wasn't tight enough and the serrations were chewing up the frame bracket and spinning the inner sleeve with suspension movement for who knows how long. Anyone reading this when you get a chance, go over those bolts and tighten them if needed to keep this from happening.
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Re: A-arm bushings, why are the bushing serrated?
Not sure Kurt, but the new style did away with the serrations....probably cuz they chewed up the buckets.
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- kserumgard
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Re: A-arm bushings, why are the bushing serrated?
Yup, chewed the inside of the brackets!
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Kirk Serumgard
AT3 US Navy, 1990-1996
1lt US Army 352 CSH, 2009-2012
Hummer H1/HMMWV 1994 6bt cummins conversion
AT3 US Navy, 1990-1996
1lt US Army 352 CSH, 2009-2012
Hummer H1/HMMWV 1994 6bt cummins conversion
- 86humv
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Re: A-arm bushings, why are the bushing serrated?
As RWH said.
I just picked up some nos upper arms, and they have no teeth.
I had some new arms with and without teeth I put on my frame build, but I
ground the teeth off a little, and coated the bare spot so as to be smooth like my others.
I just picked up some nos upper arms, and they have no teeth.
I had some new arms with and without teeth I put on my frame build, but I
ground the teeth off a little, and coated the bare spot so as to be smooth like my others.
86 Hmmwv
Lots A parts
M101A2 trailer
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Lots A parts
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M1102 trailer
- kserumgard
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Re: A-arm bushings, why are the bushing serrated?
Thanks for input guys
Kirk Serumgard
AT3 US Navy, 1990-1996
1lt US Army 352 CSH, 2009-2012
Hummer H1/HMMWV 1994 6bt cummins conversion
AT3 US Navy, 1990-1996
1lt US Army 352 CSH, 2009-2012
Hummer H1/HMMWV 1994 6bt cummins conversion
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