Topica Loopframe_Guzzi Archive


Subject: RE: wheel bearings

Author: Ian Adkins

Date: May 21, 2003, 6:26 AM

Post ID: 1713078721



Pete,

As I understand it there is a spacer in between the two bearings. As you
tighten the axle nut the two bearings tighten against this spacer (and
whatever shims are in there to vary the length). The proper distance between
the two bearings is when the distance is equal to the two races (plus just a
smidgen of play) set into the wheel. Actually a pretty neat design. If set
up right at the factory then you never have to worry about it loosening up.

When you have the bearings out give the races a good cleaning and a thorough
inspection. On my 70 Ambo project one of the races were cracked (don't know
why...likely on installation way back when).

By the way...the races should not spin in the wheel. They should be tight.
If they spin instead of the bearing then you will get a heat build up due to
friction. Best thing to do if it is loose is to add a dab of blue loctite.

You can always set up a simple rig to check the play in the bearings prior
to greasing. You really need the right combination of bolts and washers to
simulate it being on the frame. You will figure it out when you get looking
at it.

Hope this helps...Ian

p.s. you didn't answer my question about Virginia. I will assume that means
no :-)


 -----Original Message-----
From: Pete [mailto:plsch-@aol.com]
Sent: Tuesday, May 20, 2003 5:20 PM
To: Loopfram-@topica.com
Subject: Re: wheel bearings


Ya Hi Ian,
I've been pretty quiet here recently trying to survive 2 layoffs
in 2 years. Got my fingers crossed, right now all seems pretty
good. Must be a good sign I am thinking of the loop again!
I changed the needles and enrichener valves in the carbs. Ready
for a test ride soon.
I'll do the bearings, I was always intrigued by the bearing
design. It appears that the inner and outer races are locked up
when you loosen the axle nut. Someone told me that the axial
force of tightnening the nut squeezes the bearing and that allows
the inner race to rotate.
Do I have it right??
All the BEst
Pete still in PA ( barely)

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