Clutch will not disengage

The Cub Club -- Questions and answers to all of your Cub related issues.
Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
Mbotelho
Posts: 1
Joined: Mon Mar 04, 2019 9:23 pm
Zip Code: 02871

Clutch will not disengage

Postby Mbotelho » Mon Mar 04, 2019 9:39 pm

Hi everyone,
Brought home a '63 a few months ago and I've been having the time of my life playing with it! But, yesterday i started it in neutral, depressed the clutch, put in reverse, and backwards we went...despite having never releasing the clutch pedal. Depressing the pedal is ineffective and feels limp. The tractor is always in gear. Haven't split the tractor just yet. Is it safe to assume I need to replace the clutch? Thanks for the help!

Eugene
Team Cub Mentor
Team Cub Mentor
Posts: 19545
Joined: Fri Jul 02, 2004 9:52 pm
Zip Code: 65051
Circle of Safety: Y
Location: Mo. Linn

Re: Clutch will not disengage

Postby Eugene » Mon Mar 04, 2019 10:56 pm

Welcome.

For sure, you will need to split the tractor to find out what is going on.

First guess, throw out bearing is shot. Could be the pressure plate fingers are out of adjustment. And, also, could be a problem in the linkage.

Do not order parts until you find the problem(s).
I have an excuse. CRS.

User avatar
Glen
10+ Years
10+ Years
Posts: 5344
Joined: Mon Mar 19, 2012 7:33 pm
Zip Code: 00000
Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: Clutch will not disengage

Postby Glen » Mon Mar 04, 2019 11:06 pm

Hi,
You could look up in the hand hole under the clutch area, with a good light, and see how it looks.
The 3 pressure plate fingers can get too low, then the clutch won't release. Their height is adjustable. They sort of commonly need adjusting.

Below is a post showing how to adjust them, without splitting the Cub. You would need to make the tool shown in the post to check the finger height.
The graphite in the throwout bearing can get worn down also, then it might not work right. It should look like the bearing in the post. The graphite sticks out of a new bearing 5/16". If it looks good, grease the bearing with cheap grease, so the oil in the grease will absorb into the graphite, while you are there.
There is a small hole on top of the original bearings to let out excess grease.

viewtopic.php?f=141&t=66543

The clutch pedal should have 1" of free play, measured at the surface where you put your foot.
The free play being set wrong could make the clutch not release also.
There should be a spring under the platform to pull the clutch pedal up against the platform edge.
The brake pedals should have springs that look the same also.

Below is a page from a Cub owner's manual, showing how to set the clutch pedal free play, and it has a pic of the clutch.

http://farmallcub.com/rudi_cub/www.clea ... e%2056.jpg

Below is a pic showing where to measure to set the finger height, it is set with the clutch assembled on the flywheel, not off, like the pic shows.

If you can't fix it through the hand hole, then you will need to split the Cub. :)
Attachments
Cub clutch 3.jpg
Last edited by Glen on Tue Mar 05, 2019 1:34 am, edited 1 time in total.

Jim Becker
Team Cub
Team Cub
Posts: 16291
Joined: Sun Feb 02, 2003 2:59 pm
Zip Code: 55319
Circle of Safety: Y
Location: MN

Re: Clutch will not disengage

Postby Jim Becker » Tue Mar 05, 2019 12:02 am

If it happened all at once, it is likely the graphite throwout bearing just shed all its graphite. It is also possible that some part of the linkage fell apart (like a pin fell out). You may be able to determine what happened by looking in the inspection hole on the bottom of the bell housing. You may be able to replace a missing pin through the inspection hole. But in all probability you will need to do a split.

User avatar
Slim140
501 Club
501 Club
Posts: 4772
Joined: Wed Nov 22, 2017 6:24 am
Zip Code: 00000
Tractors Owned: .
1970 International 140
1972 International 140
1949 John Deere A
1993 Ford 4630 W/Loader
1965 John Deere 110
1961 Cub Cadet Original
Circle of Safety: Y

Re: Clutch will not disengage

Postby Slim140 » Tue Mar 05, 2019 6:28 am

If you have to split it and it sounds like you will, it will be a good time to replace the rear main seal on the engine. Contact tst and he can machine your retainer for a larger seal so you won’t have to worry about that leaking anytime soon.
Every home is a school, what are you teaching?

Circle of Safety


  • Similar Topics
    Replies
    Views
    Last post

Return to “Farmall Cub”

Who is online

Users browsing this forum: No registered users and 2 guests