Farm Equipment - CA hand clutch brake drum rebuild

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CA hand clutch brake drum rebuild

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Category: Allis Chalmers
Forum Name: Farm Equipment
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=51397
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Topic: CA hand clutch brake drum rebuild

Posted By: timo2le
Subject: CA hand clutch brake drum rebuild
Date Posted: 01 Jun 2012 at 5:27am

Hello,

I'm preparing to rework the right axle of a CA. I have parts ordered from Sandy Lake and Chris/CT. I ordered a left side brake drum to verify the "original" diameter as a reference to rebuilding the left side drum. I believe the diameter spec. is 5.990".

For those of you that have installed (or had a Machine shop do it) a sleeve over the right side drum, do you know what material (steel or cast iron) was used to create the sleeve? My drum diameter is 5.700. After I turn the drum to get 80 -100%, "clean-up", I will be installing a sleeve with ≈.160" wall thickness. I would like the sleeve to be cast iron (like the original drum) but making it from steel pipe or bar will be a whole lot easier and I won't have concern about the sleeve "splitting". Comments from those who have rebuilt their CA brake drum will be appreciated.

Thanks,

Tim in Wisconsin.

Replies:

Posted By: B26240
Date Posted: 01 Jun 2012 at 7:05am

How do you plan on keeping the sleeve tight on the drum? When the brakes are applied the sleeve will get hot and expand, you must be planning on a real tight fit I have never heard of this done but am curious.

Posted By: GregLawlerMinn
Date Posted: 01 Jun 2012 at 7:26pm

Been there- done that. My machinist mage a sleeve from pipe; it needed to be heated like a ring gear to slip on. When on, he spot welded it in a few spots "just to be sure". Worked great.

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What this country needs is more unemployed politicians-and lawyers.
Currently have: 1 D14 and a D15S2.
With new owners: 2Bs,9CAs,1WD,2 D12s,5D14s,3D15S2s, 2D17SIVs,D17D,1D19D;1 Unstyled WC

Posted By: Chris/CT
Date Posted: 01 Jun 2012 at 7:47pm

Tim, Your parts were shipped this morning, you should see on Monday. I agree with Greg on remedie for the sleeve install. Some have suggested to grind a slight amount of the 3 stand that compress the springs, I'm sure you have seen this suggestion on previous posts.

Posted By: Chalmersbob
Date Posted: 01 Jun 2012 at 9:21pm

Can't ypu just screw a band of steel on top of the drum?

Just drill a hole and countersink a flat head machine screw. Either tap the drum or put a nut on the inside. Bob

Posted By: timo2le
Date Posted: 02 Jun 2012 at 5:07am

Thanks Greg & Chris. The "ring gear" is a great example of a shrink fit with good resistance to slipping. I would have liked ductile iron for the wear characteristics, but I will be starting with 6" SCH 160 steel pipe also. A couple "safety" welds will be icing on the cake!

Bob, I had also pictured rolling a ring, and attaching with countersunk screws. I think that would work OK since this CA isn't going to the Daytona 500 but since I'm surrounded by a bunch of good machinists I'll have the parts machined/shrink fit.

I brought in my clutch disks this morning so we can face them on a rotary (Blanchard) grinder.

It's gonna feel so good to have brakes that can pivot the tractor, and clutch that climb a hill!!

Have a good weekend!

Tim

Posted By: DennisA (IL)
Date Posted: 02 Jun 2012 at 10:39am

I had mine spray welded then turned down to size. That seemed pretty strait, simple, and forward.

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Thanks & God Bless

Dennis