MB Clutch Issues

1941 - 1945, MB, GPW Technical questions and discussions, regarding anything related to the WWII jeep.
fernando mendes
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Re: MB Clutch Issues

Post by fernando mendes » Tue Sep 26, 2017 12:13 pm

Embreagem folga pedal.JPG
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This is my first doubt.In my GMC truck is 2 1/2" free.Is your case slipping?If so you have to check adjustment,weak pressure springs,lining oil soaked,worn lining or torn loose from plate,burned clutch.(TM10-1513)
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Re: MB Clutch Issues

Post by artificer » Wed Sep 27, 2017 12:53 am

When inspecting through the bell housing the centre raised section of the clutch driven plate (holding the damper springs) should be to the transmission & the flat side to the flywheel.
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Re: MB Clutch Issues

Post by fernando mendes » Wed Sep 27, 2017 4:38 am

DSCN4327.JPG
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Jeep Willys MB DoD dec,16 1942 s/n:196275
Dodge B3-B 4x2 1952 s/n:90099559
CCKW 353 Banjo 1944 s/n:309623

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twinflyer17
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Re: MB Clutch Issues

Post by twinflyer17 » Wed Sep 27, 2017 4:42 am

artificer wrote:
Wed Sep 27, 2017 12:53 am
When inspecting through the bell housing the centre raised section of the clutch driven plate (holding the damper springs) should be to the transmission & the flat side to the flywheel.
That's how it was installed.
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fernando mendes
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Re: MB Clutch Issues

Post by fernando mendes » Wed Sep 27, 2017 12:09 pm

fernando mendes wrote:
Tue Sep 26, 2017 12:13 pm
Embreagem folga pedal.JPG
This is my first doubt.In my GMC truck is 2 1/2" free.Is your case slipping?If so you have to check adjustment,weak pressure springs,lining oil soaked,worn lining or torn loose from plate,burned clutch.(TM10-1513)
Now I am thinking this is the correct drawing(New) for "ENGAGED" and "DISENGAGED" situations


I saw today my free pedal travel is more than 3/4".Perhaps it can be the cause of the noise(???)
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Jeep Willys MB DoD dec,16 1942 s/n:196275
Dodge B3-B 4x2 1952 s/n:90099559
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Re: MB Clutch Issues

Post by twinflyer17 » Wed Dec 06, 2017 5:07 am

Well, we finally have what we hope is a solution to this problem...

The MB was dropped off at Daryl Bensinger's shop in Narvon, PA before the holiday as neither I nor Jean-Louis (owner) had much time this fall to work on or look into this further. That said, here was Daryl's conclusion to the issue:

"Okay, we have been working on the problem. At first we couldn't get it to do what you described. Then we heard the chattering and saw the clutch not completely releasing. This was very puzzling. We decided the clutch disc hub was not sliding on the transmission input shaft. We put a small amount of oil on the shaft and the problem has gone away. It appears that the disc was rubbing the flywheel and still turning even when the clutch was depressed."

Prior to picking the jeep up and bringing it the 130 miles back to D.C., the plan is for Daryl and team to drive and continue to test the issue in order to ensure this is the problem. Hopefully the fix is this simple, though...I will post if there are any more updates, but wanted to make sure complete this thread for anyone else who might be experiencing the same type of issue(s).
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Re: MB Clutch Issues

Post by dinof » Wed Dec 06, 2017 8:02 am

Did he say the throwout bearing was good? I could't tell from the video if the clutch was making that noise (chatter) or it was the t/o bearing.
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Re: MB Clutch Issues

Post by twinflyer17 » Wed Dec 06, 2017 8:26 am

I'm skeptical as well. Seems like too simple a fix. I don't believe he said anything about the t/o bearing. That was replaced new along with the clutch back in the spring. Sometimes the most confusing and difficult items can be the easiest to fix, though, right?
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Re: MB Clutch Issues

Post by Joe Gopan » Wed Dec 06, 2017 8:40 am

Too much crap covering the M.D. Shaft and T.O. Bearing. Best leave the splines with a minimum smear of grease and a dab on the pilot end where it enters the bushing. I have used Lubriplate 630AA since the 50's.
Don't forget to put a dab in the dimple of the fork where it pivots.
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Re: MB Clutch Issues

Post by artificer » Wed Dec 06, 2017 9:05 am

I agree with Joel.
When the clutch plate was replaced did one check wear on the input shaft where the old clutch travelled....that seems to be the sticking point/issue.
John GIBBINS Member Institute of Automotive Mechanical Engineers [Ret], ASE Master Medium/Heavy Truck & Auto Technician USA -2002 Licensed Motor Mech NSW MVIC 49593 Current 2015
TO DIAGNOSE, TROUBLESHOOT OR FAULT FIND ANY AUTO SYSTEM....
Understand how system parts interact with one another. GOOD parts can then be established & the NOT GOOD problem/s part/s isolated for repair or replacement.


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