GMCnetters,
I ran upon a couple of issues that had been previously identified by
others.
First, the ball joints I received(Moog) would not accept grease thru the
zerk fitting(as written up by GMCMN). I removed the fitting and
verified that it was bottoming out. The simple fix was to file a groove
across it with a triangular file. The hole in the Moog joint does not
go through to the ball, so I didn't need to worry about the fitting
hitting anything important.
Second, I was fitting my 80mm calipers and ran into the same problem
that Arch did on the left side. There was a small rectangular
boss(probably the remains of casting sprue) on the steering knuckle that
interfered with the caliper. It wasn't as obvious on mine as it was on
Arch's and I probably could have bolted everything together without
realizing that there was a problem. This would have prevented the
caliper from sliding freely. The right side wasn't a problem. If
you've upgraded to large calipers, you might want to be sure that you
don't have any interference between the knuckle and calipers.
Another thing on the large calipers, I had to draw file the caliper ears
on one of the knuckles(don't recall which side, but I can look if it's
important) to provide some clearance for the larger caliper. The
knuckle was a rebuilt one and appeared to have some rust pitting on
those surfaces.
If you're considering this upgrade, I recommend doing it with the
knuckles off the coach. Having all the parts on a bench makes fitting
them up much easier than standing on your head in the wheel well.
Patrick
- --
Patrick Flowers
Mailto
atri63
The GMC Motorhome Page
http://www.gmcmotorhome.com
I ran upon a couple of issues that had been previously identified by
others.
First, the ball joints I received(Moog) would not accept grease thru the
zerk fitting(as written up by GMCMN). I removed the fitting and
verified that it was bottoming out. The simple fix was to file a groove
across it with a triangular file. The hole in the Moog joint does not
go through to the ball, so I didn't need to worry about the fitting
hitting anything important.
Second, I was fitting my 80mm calipers and ran into the same problem
that Arch did on the left side. There was a small rectangular
boss(probably the remains of casting sprue) on the steering knuckle that
interfered with the caliper. It wasn't as obvious on mine as it was on
Arch's and I probably could have bolted everything together without
realizing that there was a problem. This would have prevented the
caliper from sliding freely. The right side wasn't a problem. If
you've upgraded to large calipers, you might want to be sure that you
don't have any interference between the knuckle and calipers.
Another thing on the large calipers, I had to draw file the caliper ears
on one of the knuckles(don't recall which side, but I can look if it's
important) to provide some clearance for the larger caliper. The
knuckle was a rebuilt one and appeared to have some rust pitting on
those surfaces.
If you're considering this upgrade, I recommend doing it with the
knuckles off the coach. Having all the parts on a bench makes fitting
them up much easier than standing on your head in the wheel well.
Patrick
- --
Patrick Flowers
Mailto
atri63The GMC Motorhome Page
http://www.gmcmotorhome.com
