420 Main Clutch
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- MC crawler
- Posts: 5
- Joined: Mon Sep 23, 2013 8:21 pm
- Location: Ontario
420 Main Clutch
I've recently encountered a situation where I push the clutch pedal and the dozer stops but if I take it out of gear and leave it for a few seconds I'm unable to put it back into gear without serious grinding. If I shift reasonably quickly between reverse and second, directly opposite shift positions, I'm fine but by the time I make my way over to 1st or 3rd etc the grinding resumes. The logical conclusion is that the throw out isn't throwing out far enough. Interestingly the problem doesn't occur when the machine is cold but I attribute that to thick transmission oil. I have tried adjusting the bolt on the side to reduce the free stroke of the clutch pedal to 1" but can't get below about 1.5". So assuming my aforementioned logic is sound, where is the insufficient throw coming from? Is there an adjustment to the fingers on the pressure plate? Is there anything else I can do short of pulling the engine and getting at the clutch?
- DukeofDeere
- 1010 crawler
- Posts: 443
- Joined: Wed Oct 26, 2011 7:12 am
- Location: Hudsonville Michigan
As much as I hate to say it, I think you should pull the engine and check the clutch. Sometimes the clutch discs will bind on the prop shaft and drag against the flywheel or pressure plate and cause this.
While you have it split, check all the linkages for wear, damage, etc.
Lavoy
While you have it split, check all the linkages for wear, damage, etc.
Lavoy
Parts and restoration for antique and late model John Deere crawlers.
Owner and moderator www.jdcrawlers.com
Owner and moderator www.jdcrawlers.com
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- MC crawler
- Posts: 5
- Joined: Mon Sep 23, 2013 8:21 pm
- Location: Ontario
- DukeofDeere
- 1010 crawler
- Posts: 443
- Joined: Wed Oct 26, 2011 7:12 am
- Location: Hudsonville Michigan
Make sure you check the pilot bushing too. I have seen those cause that sort of problem too.It will make the input shaft hang up to the flywheel and cause the spinning of it instead of stopping as it should when you push the clutch in. Just another thing to look for but still have to pull it apart... sorry
scampr 440icd, 350B, 47 Farmall H, 55 Farmall cub and ashamed to have a Kabota too
- DukeofDeere
- 1010 crawler
- Posts: 443
- Joined: Wed Oct 26, 2011 7:12 am
- Location: Hudsonville Michigan
oh yea you for sure have to pull the motor. and its not quite as bad as you think, i can pull the motor off mine in about 30 min, only split mine about 12 times getting my clutch correct.
Buy the gauge to set the pressure plate!!!!!!!!!! eliminates alot of trouble.
send me a pm and i can give you a couple tips that i learned the hard way and will make this job no problem.
Buy the gauge to set the pressure plate!!!!!!!!!! eliminates alot of trouble.
send me a pm and i can give you a couple tips that i learned the hard way and will make this job no problem.
Home of the free because of the BRAVE!!!
1957 420 5 roller 5 speed
1957 420 5 roller 5 speed
57jd420, why not post your suggestions here on jdcrawlers? We could all stand to be a little bit more knowledgeable.
I do think it is funny how we all tell folks to pull their final drives whenever they have a steering problem, but hate to mention when they have to pull the engine. Engine is a lot easier, but we all realize that working on the finals is inevitable. Gil
I do think it is funny how we all tell folks to pull their final drives whenever they have a steering problem, but hate to mention when they have to pull the engine. Engine is a lot easier, but we all realize that working on the finals is inevitable. Gil
JD440-ICD loader; JD440-IC bulldozer; JD440-ICD backhoe; JD440-I backhoe; JD440-I tractor; + five recumbent JD440-ICs
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- MC crawler
- Posts: 5
- Joined: Mon Sep 23, 2013 8:21 pm
- Location: Ontario
Ok. Confession time. I eventually figured out that my big fat size 13 boot was bottoming out on the footrest. If I push my foot over the top so I get a little more travel it seems to work fine. Having said that however, it seems logical that I have a linkage wear problem somewhere that is messing things up. I tried adjusting the bolt on the side of the housing but it appears to be fully extended. I will have to pull it apart in the spring when it warms up and see if I can figure it out.
- DukeofDeere
- 1010 crawler
- Posts: 443
- Joined: Wed Oct 26, 2011 7:12 am
- Location: Hudsonville Michigan
- Stan Disbrow
- 350 crawler
- Posts: 2899
- Joined: Fri Jul 15, 2005 3:13 pm
- Location: Raleigh, NC
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