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willysmjeeps.com :: View topic - Brakes question for m38 and m38a1
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Brakes question for m38 and m38a1

 
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11cgrunt
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Joined: Dec 21, 2010
Posts: 75
Location: S.W. Missouri

PostPosted: Mon Dec 26, 2011 10:58 am    Post subject: Brakes question for m38 and m38a1 Reply with quote

Are the brake cylinders and master cylinders the same for the m38 and m38a1?

Matt R
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U.S Army 1989-2006 Airborne Infantry
8-51 m38
My jeep doesn't leak. its just marking its territory.
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evanso1975
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Joined: May 10, 2010
Posts: 615
Location: North Yorkshire, UK

PostPosted: Mon Dec 26, 2011 12:12 pm    Post subject: Reply with quote

From the ORD-9's:

Master cylinder part numbers are the same, so they will fit both jeeps.
Wheel cylinder service replacements for the M38 are the same as the M38A1.

Based on this, M38A1 wheel cylinders fit the M38. Not sure what the difference between the M38A1 wheel cylinders and the factory-installed M38 ones were, though. Confused

Fyi, the original M38 & M38A1 master cylinder comes in either aluminium or cast iron construction. The original cast iron one looks like this:


That casting number is FE-2693.

Owen.
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Owen

1951 US Air Force M38
1944 F-1 1/2-ton Airdrome Trailer
1940 C15 Chevrolet CMP 11-cab
1939 DKW KS200 Motorcycle
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11cgrunt
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Joined: Dec 21, 2010
Posts: 75
Location: S.W. Missouri

PostPosted: Mon Dec 26, 2011 12:31 pm    Post subject: Reply with quote

Thank you for the information. I guess this will also be the same for the WWII era jeeps. M38 will fit MB/GPW?

Matt R
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8-51 m38
My jeep doesn't leak. its just marking its territory.
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artificer
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Joined: Feb 16, 2007
Posts: 206
Location: Gold Coast Australia

PostPosted: Wed Dec 28, 2011 2:42 am    Post subject: Reply with quote

1" master cylinder, 1" front, 3/4" back, master cylinder bolt holes to frame change somewhere along the line, not sure when.
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John GIBBINS
ASE Master Medium/Heavy Truck & Auto Technician 2002 USA
Licensed Motor Mechanic NSW # MVIC 49593 Current
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doug9
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Joined: Dec 25, 2011
Posts: 1

PostPosted: Wed Dec 28, 2011 2:56 am    Post subject: Reply with quote

I'm wanting to know if any one knows the size and length needed for the brake linnings for a 1 ton willys truck. Thanks in advance. Doug9
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