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Thinking again ...
We are still asking:
What did you
get done on
your Bolt today
????


The question, initially posted May 23, 2005, was:
"Whatcha do on your Bolt
this weekend?"

After 51,906,997 views, 7378 replies over 185 pages, this thread in General Truck Talk is a happening! And it's not just weekends anymore.


Now with pictures
and No BOTS.


So ...


What did you get done on your Bolt today????


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Master Cylinder Kit for 1940 1/2 ton pickup
#1437856 Wed Jan 19 2022 09:21 AM
Joined: Sep 2018
Posts: 41
R
Riggles Offline OP
'Bolter
I have just purchased a kit to rebuild the Delco master cylinder on my 1940 pickup. When I set out the parts, there is an extra rubber piston/washer that was not in the pieces I pulled out. can someone please point me in the direction of an exploded diagram or photo of the assembly order of the pistons, pushrod, check valve, spring, etc.
Many thanks in anticipation, Riggles, Australia.

Re: Master Cylinder Kit for 1940 1/2 ton pickup
Riggles #1437955 Wed Jan 19 2022 10:58 PM
Joined: Jun 2004
Posts: 8,530
W
'Bolter
The round rubber washer goes on the big nut on the rear end of the MC. It is the seat for the check valve on the end of the spring.
George


They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.

1972 Chevy c10 Cheyenne Super
Re: Master Cylinder Kit for 1940 1/2 ton pickup
Riggles #1437983 Thu Jan 20 2022 02:46 AM
Joined: Sep 2009
Posts: 182
J
'Bolter

Re: Master Cylinder Kit for 1940 1/2 ton pickup
Riggles #1438002 Thu Jan 20 2022 06:01 AM
Joined: Sep 2018
Posts: 41
R
Riggles Offline OP
'Bolter
Men, thanks very much for the info. George, I don't know how I didn't see the washer in the end, must have had an eye closed! I have now got it all together & will start & put it all together over the next couple of days. I have printed off the diagram of the master cylinder, so my sons will have something to help them in the years to come.
I am making a new sound deadening layer to fit under the floor mat, which should also reduce some heat coming up from underneath.
Once again, thanks for the help. The help & advice I have received over the last few years has been great, and I tell friends what a great forum this is.

Re: Master Cylinder Kit for 1940 1/2 ton pickup
Wrenchbender Ret. #1438067 Thu Jan 20 2022 10:40 PM
Joined: Sep 2018
Posts: 41
R
Riggles Offline OP
'Bolter
George, one thing I don't see on the diagram of the master cylinder assembly (as in the links sent by joe apple), is the shim washer which was between the piston cup & the end of the piston with the small radial holes. Is it supposed to be there? There was one fitted when I pulled it all apart, and there was a new one in the kit. Is it an omission on the diagram?
Thanks again, Riggles

Re: Master Cylinder Kit for 1940 1/2 ton pickup
Riggles #1438371 Sun Jan 23 2022 03:37 AM
Joined: Jun 2004
Posts: 8,530
W
'Bolter
Its been a long time but it seams like that is part of the piston. You put it in there I suppose. There are 2 small bypass holes in the bottom of the reservoir. Make sure they are open. One is very small. You may need to run a tag wire through it.

George

Last edited by Wrenchbender Ret.; Fri Jan 28 2022 04:55 PM. Reason: Reservoir instead of cyl.

They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.

1972 Chevy c10 Cheyenne Super
Re: Master Cylinder Kit for 1940 1/2 ton pickup
Riggles #1439127 Fri Jan 28 2022 05:55 AM
Joined: Sep 2018
Posts: 41
R
Riggles Offline OP
'Bolter
It's all done and once again, the little Red truck stops as good as some of the late models. The power booster under the floor really helps. Thanks again men.


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