CMP front wheel bearing shims

[Tony Smith]

Originally Posted by Jacques Reed

Hi John,

I posted this on MLU Forum on their FB page this morning. Replying to Jordan.

Hope this helps.

Cheers

WHAT!! A secret "Shadow" MLU is out there?

[Hanno Spoelstra]

Originally Posted by Tony Smith

WHAT!! A secret "Shadow" MLU is out there?

Yes, read about the “why” here: http://www.mapleleafup.net/forums/sh...ad.php?t=24991

Keith Webb set up a CMP Facebook page long before MLU-FB, there’s also an Australian group on Blitzes and a myriad of other groups on all sorts of related subjects.

[Tony Smith]

Originally Posted by Hanno Spoelstra

Yes, read about the “why” here: http://www.mapleleafup.net/forums/sh...ad.php?t=24991

Well, I suppose at least they have a "Like" button!

[Bob Carriere]

For my personal edification.......

Not all models have the cast iron tea cup.....having seen it only once on/in a HUP front axle......

Dealing primarily in C15a...... what model/year etc. has the tea cup and why not others???? My front axle has the R-Zeppa U-joint.....others I have dismantled had the later simpler U-joints but no tea cup?????

Never too late to learn!!!!!

[Jacques Reed]

Hi Bob,

I also would like some edification.

My Ford F15-A Parts List shows 14 different Spacers in 0.005" increments.
Did GM do the same? I believe that part of the drive train was common to Ford and GM.

Next question is why? Was the manufacturing tolerances so large they needed such a large range. I know bearing preload is affected by small change in distance hence the shims but so many "Teacups". Maybe the "Mad Hatter" was in charge of design!

Even amongst the spacers I have two different designs but perhaps just 2 different foundry suppliers.

Disregard my previous comment about "B". probably just a foundry mark. Found a very faint stamp on one of the larger ones near the horizontal groove. "K" and when miked it is 2.110"
Another large one has what looks like a very faint "H" at the same location and measures 2.095". Both were hard to find. Never stop finding out new things about these trucks

Look forward to some info.

Cheers,

[Tony Smith]

My understanding in the difference in C11Q-1193-A,B, C, D, etc and C21Q-1193A is that the 1941 pattern used several different spacers in different sizes to suit, while 1942 used only one spacer of a standard size, but built that up with different shims.

I suppose someone thought that keeping supplies of multiple sized spacers was more of a production or logistical supply problem than having only one spacer and supplying shims for adjustment.

[Jacques Reed]

Hi Tony,

That makes a lot of sense. My parts list is Dated 1943 and only shows the Cab 13 but I would think they would just carry on parts from previous model years if already in the system.
Looking again at it there is only 0.060" difference between the shortest and longer spacer. well within the realm of compensating intermediate sizes with shims on a standard 2.060" spacer.

Cheers,