JD 40C Steering Clutch Disassembly Surprises

[dmlinton]

Well I finally got around to taking a serious look at the final drives on my 40C. Ctrawler had got to where it refused to move so I figured it was time to get at and do the restoration. Anyhow, oil is coating pretty well everything in the steering clutch housings. Brake bands oil covered but appear brand new otherwise. Throw out bearing fingers do not appear to have any wear on one side - the other shows a fair bit of wear.

I have taken only one clutch pack apart but found seven steel and seven fiber disks - I thought it was supposed to be six steel and seven fibre??. The outer fibre (against the pressure plate) was broken in several pieces. The other disks, both steel and fibre, appear to have little or no wear but they are oil covered with some rust spots on the outer edges.

Should the broken (shattered) fiber disk and/or the extra steel disk be telling me something important?

[Tigerhaze]

The outer fibre (against the pressure plate) was broken in several pieces.

Should the broken (shattered) fiber disk and/or the extra steel disk be telling me something important?

Read this thread- might be a contributing factor on the broken fiber discs:

http://www.jdcrawlers.com/messageboard/ ... =gray+grey

[Lavoy]

The main thing it is telling you is someone bubblegummed it together rather than repairing correctly. From factory, a 40 has 6 fibers, and 5 steels. When we convert to 420 clutch, 7 fibers, 6 steels.
Lavoy

[Stan Disbrow]

Hi,

If you have worn discs, just stick in a couple extras to build up the stack height!

Of course, you see where that is a bad idea....

Stan

[dmlinton]

The main thing it is telling you is someone bubblegummed it together rather than repairing correctly. From factory, a 40 has 6 fibers, and 5 steels. When we convert to 420 clutch, 7 fibers, 6 steels.
Lavoy

Wow! Two extra steels and an extra fibre to make up the slack - that's a lot of wear. Which disks would the wear occur on? The fibre ones or both?

Is there any chance someone may have replaced the original 40C finals with ones off of a 420C? The finals I have are yellow inside and out but the tractor is green.

In any case, Lavoy, you got an order for final drive parts coming as soon as I get organized a little better here. I think that I am going to completely rebuild the final drives - bearings, seals and clutch disks. I think the pressure plates are good but will have to get the specs and do some checking to be sure.

I love this old crawler. Bought it 14 years ago as a restoration project after my Doc told me to get a hobby when I had a heart attack. But, I have always had too much fun playing with it to tear it apart.

[Lavoy]

I know you hate to shut it down, but they are even more fun when everything works right, and you don't have to worry about things breaking due to bad components.
Lavoy

[vtjoe]

don't forget to get the clutch setting tool from Lavoy also