Parking brake drum

4x4M38 · Posted: Sat Feb 25, 2017 8:57 pm Post subject: Parking brake drum

Is there a difference between an M38 and other
parking brake drums?
_________________
Brian
1950 M38
MC11481
http://www.willysmjeeps.com/v2/modules.php?set_albumName=album372&op=modload&name=gallery&file=index&include=view_album.php

wesk · Posted: Sat Feb 25, 2017 9:30 pm Post subject:

Yes & no! There are variations like the Early WWII outer shoe type and the M38A1 outer shoe type but the Late WWII, M38, CJ2A, CJ3A, CJ3B, CJ5 & CJ6 with the F134 and L134 all used the same system (shoe inside the drum) and all should interchange since All used drum PN A9332 or ORD# 7371010.
_________________
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

4x4M38 · Posted: Sun Feb 26, 2017 6:38 am Post subject:

Thanks Wes.

The reason I ask is I've been offered a takeoff but it has two extra holes
drilled in it I've not seen in NOS and my takeoff. They are a little larger
than the bolt holes and on either side of two of the cast openings.

The offered one has not been cleaned so the casting numbers are
not available.
_________________
Brian
1950 M38
MC11481
http://www.willysmjeeps.com/v2/modules.php?set_albumName=album372&op=modload&name=gallery&file=index&include=view_album.php

WillysMotors · Contributor Joined: Jan 19, 2006 Posts: 111

There are also different rib configurations. The late MB and very early CJ2A are unique

wesk · Posted: Sun Feb 26, 2017 2:41 pm Post subject:

Keith, Since the part number remains the same, A9332, Late MB thru CJ5/6 are you seeing the rib differences on the factory blue prints?
_________________
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

4x4M38 · Posted: Sun Feb 26, 2017 4:43 pm Post subject:

One would think the casting numbers would be different as well.

Any thoughts on those two holes? Won't they affect balance?
_________________
Brian
1950 M38
MC11481
http://www.willysmjeeps.com/v2/modules.php?set_albumName=album372&op=modload&name=gallery&file=index&include=view_album.php

WillysMotors · Contributor Joined: Jan 19, 2006 Posts: 111

I haven't checked any drawings, but they are easy to tell apart.

Late MB and Very Early CJ2A

CJ2A /M38/CJ5

wesk · Posted: Sun Feb 26, 2017 11:14 pm Post subject:

Brian, It was not uncommon for a basic casting to live thru several machining changes over it's life with the changes being made on the blueprint as dated alterations or notes.
_________________
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

4x4M38 · Posted: Mon Feb 27, 2017 7:36 am Post subject:

Thanks guys.

Ok, so Keith's bottom photo shows three additional holes.

What gives?
_________________
Brian
1950 M38
MC11481
http://www.willysmjeeps.com/v2/modules.php?set_albumName=album372&op=modload&name=gallery&file=index&include=view_album.php

WillysMotors · Contributor Joined: Jan 19, 2006 Posts: 111

I believe those are balance holes

4x4M38 · Posted: Mon Feb 27, 2017 10:25 am Post subject:

That is what occurred to me but I did not want to assume anything.
_________________
Brian
1950 M38
MC11481
http://www.willysmjeeps.com/v2/modules.php?set_albumName=album372&op=modload&name=gallery&file=index&include=view_album.php

WillysMotors · Contributor Joined: Jan 19, 2006 Posts: 111

Reinforcing Wes's point:


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