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willysmjeeps.com :: View topic - Dana 25 with Bendix U-Joint question
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Dana 25 with Bendix U-Joint question

 
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Mike_B
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Location: Southern Maryland

PostPosted: Wed Jan 15, 2020 9:14 pm    Post subject: Dana 25 with Bendix U-Joint question Reply with quote

I've got my 1953 M38A1 Dana 25 apart for my restoration and I need help in understanding the Bendix Joint.

The previous owner/mechanic filled the U-joint cavity full of standard wheel bearing grease and the axle just carved a tunnel in it, so I pulled the axles and put them in my parts cleaner. During the cleaning process one of the axles fell apart. Looking at the maintenance and the operations manuals I see how to put it back together, but fail to find an explanation for what the small staked pins purpose is. Can someone explain this to me?

Thanks,

Mike B Smile
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Mike B
1953 M38A1 Brush Truck
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OKCM38CDN
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Location: Del City, OK

PostPosted: Thu Jan 16, 2020 8:22 am    Post subject: Reply with quote

If I remember correctly the pin holds one of the balls in the center of the axle for the others to float around... there should be a hole in one of the axle halves and a hole in one of the balls put them together and the rest go from there. They need a bit of nudging to get put back together but they will go...
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Hal, KB1ZQ
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1952 M-38 CDN CAR 52-31313
1952 M-100 Strick #104
1951 Willys Wagon (For Sale)
1954 Willys M38A1 (Restoration In Progress)
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wesk
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PostPosted: Thu Jan 16, 2020 10:42 am    Post subject: Reply with quote

Actually he is asking about both pins.


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Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

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Mike_B
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PostPosted: Thu Jan 16, 2020 1:57 pm    Post subject: Reply with quote

Thanks for the drawing Wes make it easier to ask my questions...

My #4 pin is still in place, but the rest fell apart during cleaning. Is this anything to be worried about?

I think I got it now after additional research...the #3 ball pin hole is drilled deep allowing the pin to be pushed in flush during assembly and the last step is to shake the #3 pin into the center ball and lock it in place with the #4 pin which keeps it from falling back into the deep hole. Right?

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Mike B Smile
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Mike_B
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PostPosted: Thu Jan 16, 2020 2:07 pm    Post subject: Reply with quote

Two of the balls measure .8710" and two measure .8725"...the center ball is smaller at .8115" . Are the different sizes an issue or is that normal?

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wesk
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PostPosted: Thu Jan 16, 2020 9:26 pm    Post subject: Reply with quote

The replacement balls have optional sizes which I would assume is for either matching size as close as possible or for reducing clearance with knuckles as much as possible.
A-6288 center ball
A-6289 = .872"
A-6290 = .873"
A-6291 = .874"
A-6292 = .875"
A-6293 = .876"
A-6294 = .877"
A-6295 = .878"
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Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php
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Mike_B
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PostPosted: Thu Jan 16, 2020 11:53 pm    Post subject: Reply with quote

Thanks for the info Wes!

I'm going to put it back together tomorrow and check the back lash per the manual and see how bad it is...will let you know what I find...

Mike B Smile
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