350 right side slipping

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lurch85
430 crawler
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350 right side slipping

Post by lurch85 » Thu May 23, 2013 1:01 am

Had the right final drive off before, adjusted clutch with special tool.. adjusted linkages as specified for clutch and brake on that side. Used it in the swamp during winter and never noticed a problem. Now noticing it slipping when warm. Readjusted clutch so that its a bit tight to no avail. Weak pressure plate springs? Can I test the springs to make sure that is the culprit? While I am in there... what is the specs for thickness on the metal and clutxh plates? (Assuming I don't find an oil leak)
John Deere 420C, John Deere 350 straight with Gafner loader, John Deere 4020

pdmech08

350 Clutch slipping

Post by pdmech08 » Thu May 23, 2013 7:03 am

You don't want it on the tight side. If anything you want to create more clearance on the T/O brg. T/O brg should not touch fingers on pressure plate when steering lever is at rest. Could be weak or broken pressure plate springs or oil.

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Lavoy
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Post by Lavoy » Thu May 23, 2013 7:36 am

If you are going to the work of pulling the final, replace the clutches and pressure plate, too much work to be redoing if you guess wrong. Parts are readily available, I normally have them in stock.
Lavoy
Parts and restoration for antique and late model John Deere crawlers.
Owner and moderator www.jdcrawlers.com

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lurch85
430 crawler
430 crawler
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Joined: Fri Feb 01, 2013 6:11 pm
Location: Upper Peninsula of Michigan

Post by lurch85 » Fri May 24, 2013 3:38 am

actually what I mean is I adjusted the clutch so that it's definitely allowing enough pressure on the pressure plate, assuming the springs aren't messed up or broken
John Deere 420C, John Deere 350 straight with Gafner loader, John Deere 4020

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lurch85
430 crawler
430 crawler
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Joined: Fri Feb 01, 2013 6:11 pm
Location: Upper Peninsula of Michigan

Post by lurch85 » Fri May 24, 2013 3:42 am

Thanks Lavoy...I'll probably be contacting you soon for parts... as soon as some of my other projects are done i'll tear into it.
John Deere 420C, John Deere 350 straight with Gafner loader, John Deere 4020

LEK1951
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Post by LEK1951 » Thu Jan 23, 2014 3:26 pm

Check the vertical shaft that actuates the throwout bearing. My 1010C was slipping and I found the shaft was sticking in the bottom of the housing. There's a plug you can remove from underneath the housing and free it up.

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lurch85
430 crawler
430 crawler
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Joined: Fri Feb 01, 2013 6:11 pm
Location: Upper Peninsula of Michigan

Post by lurch85 » Tue Feb 04, 2014 12:28 am

interesting (kinda) plot turn. got everything back together and went to adjust things up. everything seemed to be ok until I realized that the brake actuating "collar" and the next one to it are frozen together... (got it to move a bit and now soaking it overnight in some PBPowerblaster... wish I would have checked that out a bit before I got the finals on.
John Deere 420C, John Deere 350 straight with Gafner loader, John Deere 4020

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lurch85
430 crawler
430 crawler
Posts: 95
Joined: Fri Feb 01, 2013 6:11 pm
Location: Upper Peninsula of Michigan

Post by lurch85 » Tue Feb 04, 2014 9:02 pm

UPDATE
well.. got it freed up... too much oil to use a torch... used a heat gun and held it on there for about 10 minutes and was able to suck some Kroil into the gaps after (what seems like hundreds) of back and forth movements. (hammer and punch with a 3 pound hammer one way, with half expecting breaking off the arm where the adjusting bolt hits it), and a rolling head pry bar wedged under the lever on top of the brake band itself..... hopefully little to none of the Kroil got under the band itself. too tired to do more now, will adjust and try again in the daylight.
John Deere 420C, John Deere 350 straight with Gafner loader, John Deere 4020

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