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Identify this master cylinder

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Flatfender Ben View Drop Down
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    Posted: 13 Jan. 2020 at 8:04pm
My latest project has this brake/clutch combo master cylinder. 
It leaks so I would like to replace it with a new one. 
Any idea what it came off of???
Also can’t figure out why it’s cast brake on the clutch side and clutch on the brake side Confused
Thanks for sharing your thoughts Smile


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Post Options Post Options   Thanks (0) Thanks(0)   Quote nofender Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jan. 2020 at 8:15pm
Early 60’s Chevy pickup. 
46 CJ2A rockcrawler
46 CJ2A resto-mod
51 Bantam-ish trailer
68-ish CJ5
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Nothing Special Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jan. 2020 at 8:17pm
Just spit-ballin', but did right-hand drive postal Jeeps have the pedals mirrored?
Bob

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Post Options Post Options   Thanks (0) Thanks(0)   Quote RICKG Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jan. 2020 at 8:38pm
Well now Ben how bout a clue which project.. You asked what it came off of, I wonder what its on.. not yeller jeep? Muley..
I never met a mule I didn't like!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Nick_ Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jan. 2020 at 9:10pm
Originally posted by Flatfender Ben Flatfender Ben wrote:

My latest project 
Did you purchase a certain vehicle that needs slight engine work?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote dasvis Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jan. 2020 at 9:24pm
With a casting # & bore size I can tell you exactly.  It's what I did for 30 years & still have all of the old catalogs, buyers guides, & casting # interchange info.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Flatfender Ben Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jan. 2020 at 10:21pm
Originally posted by nofender nofender wrote:

Early 60’s Chevy pickup. 
I will check that out. 
Thanks 
1946 cj2a desert dog
1946 cj2a bulldog
1948 cj2a blue jeep
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Flatfender Ben Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jan. 2020 at 10:22pm
Originally posted by RICKG RICKG wrote:

Well now Ben how bout a clue which project.. You asked what it came off of, I wonder what its on.. not yeller jeep? Muley..
Yes ole yellar, so far it’s still my latest project. 
1946 cj2a desert dog
1946 cj2a bulldog
1948 cj2a blue jeep
1953 cj3b yard dog
1955 willys wagon
1955 willys pickup
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1968 jeepster commando
1990 Grand wagoneer
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Flatfender Ben Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jan. 2020 at 10:24pm
Originally posted by Nick_ Nick_ wrote:

Originally posted by Flatfender Ben Flatfender Ben wrote:

My latest project 
Did you purchase a certain vehicle that needs slight engine work?
??????
The one thing it doesn’t need is engine work..... I hope!
1946 cj2a desert dog
1946 cj2a bulldog
1948 cj2a blue jeep
1953 cj3b yard dog
1955 willys wagon
1955 willys pickup
1956 willys pickup boomer
1960 fc 170
1968 jeepster commando
1990 Grand wagoneer
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Flatfender Ben Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jan. 2020 at 10:27pm
Originally posted by dasvis dasvis wrote:

With a casting # & bore size I can tell you exactly.  It's what I did for 30 years & still have all of the old catalogs, buyers guides, & casting # interchange info.

I didn’t see any #s  I haven’t pulled it yet... so maybe on the bottom?
I will get it pulled off. 
Thanks 
1946 cj2a desert dog
1946 cj2a bulldog
1948 cj2a blue jeep
1953 cj3b yard dog
1955 willys wagon
1955 willys pickup
1956 willys pickup boomer
1960 fc 170
1968 jeepster commando
1990 Grand wagoneer
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Nick_ Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jan. 2020 at 11:11pm
Originally posted by Flatfender Ben Flatfender Ben wrote:

??????
The one thing it doesn’t need is engine work..... I hope!

I saw a V8 Jeep for sale near Las Vegas with a similar master. Thought you scooped it up.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote hotrod59 Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jan. 2020 at 11:36pm
It’s a 1960-62 Chevy truck master. Popular swap for Jeeps with hanging pedals. Advance adapters sells a master that is reversed like that for Jeeps  

Edited by hotrod59 - 13 Jan. 2020 at 11:41pm
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Flatfender Ben View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Flatfender Ben Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan. 2020 at 12:30am
Originally posted by Nick_ Nick_ wrote:

Originally posted by Flatfender Ben Flatfender Ben wrote:

??????
The one thing it doesn’t need is engine work..... I hope!

I saw a V8 Jeep for sale near Las Vegas with a similar master. Thought you scooped it up.
Ha ha that makes sense... don’t distract me with another jeepBig smile
1946 cj2a desert dog
1946 cj2a bulldog
1948 cj2a blue jeep
1953 cj3b yard dog
1955 willys wagon
1955 willys pickup
1956 willys pickup boomer
1960 fc 170
1968 jeepster commando
1990 Grand wagoneer
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Flatfender Ben View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Flatfender Ben Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan. 2020 at 12:34am
Originally posted by hotrod59 hotrod59 wrote:

It’s a 1960-62 Chevy truck master. Popular swap for Jeeps with hanging pedals. Advance adapters sells a master that is reversed like that for Jeeps  
Sweet!!!
Thanks for the info. 
I guess the linkage on a Chevy must be reversed.... I don’t have one to look at, but now I’m curious. 
Looks like amazon can get me one. 
1946 cj2a desert dog
1946 cj2a bulldog
1948 cj2a blue jeep
1953 cj3b yard dog
1955 willys wagon
1955 willys pickup
1956 willys pickup boomer
1960 fc 170
1968 jeepster commando
1990 Grand wagoneer
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Post Options Post Options   Thanks (0) Thanks(0)   Quote CT48 Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan. 2020 at 8:55am
The clutch bore has no residual pressure valve like the brake bore has. The valve holds a slight pressure in the brake circuit. You don't want that residual pressure in a clutch that could keep the TOB from pulling away from the pressure plate.

Simple fix is to take the valve out and swap it to the other side, but also swap what looks like a thick black garden hose washer that is in the very forward part of the bore. You may need to hook it with a wire if it won't fall out. It is a seal for the valve.

The valve is on the forward end of the coil spring. It looks like the top to an old fashioned salt shaker.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Flatfender Ben Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan. 2020 at 10:28am
Wow thanks for letting me know!
I definitely didn’t think of that, I will take the old one apart just to see if it’s switched. 
This forum is great, a lot of experience and knowledge. 
Thanks everyoneClap

1946 cj2a desert dog
1946 cj2a bulldog
1948 cj2a blue jeep
1953 cj3b yard dog
1955 willys wagon
1955 willys pickup
1956 willys pickup boomer
1960 fc 170
1968 jeepster commando
1990 Grand wagoneer
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