48 1 ton leaking master cylinder

[Mike 1948 1Ton]

Woke the truck up from storage, no puddles under the truck. Whet to get gas and beer, about 10 mile round trip. Parked in garage and see a puddle on the floor under the master cylinder, leaking from the rear boot where the plunger shaft goes in. Bad seal? I have the rebuild kit on hand. Does the cylinder need to be honed when I get it out?

 

thanks

Mike

 

[Jerry Roberts]

Rebuild or replace depending on how it looks inside . Some of us are having the old master cylinders sleeved with brass or stainless steel so that the next time it happens you can just pop in a kit . 

[Mike 1948 1Ton]

Good point, I'll have to see what it looks like when I get it out.

 

Thanks

[Young Ed]

If you want to have it sleeved brake and equipment warehouse in NE can do it. 

[Mike 1948 1Ton]

Ah, good to know!!! Thanks Ed!

 

Mike

 

[Mike 1948 1Ton]

Here's the problem, line coming out of the back/bottom of the master cylinder. The crack was facing straight down. Was not leaking over winter, but must have had a bit of water around the fitting? I remember that the road was wet and muddy the last day I drove it last fall. So maybe a small bit of water settled there and froze. Then the first time I drive it this year it let loose. While I have it all out I am going to put the new parts inside the MC, spring, cup, piston and all the other little stuff in there. Should be back to normal soon!

 

Mike

 

Edited May 14, 2018 by Mike 1948 1Ton

[Dodgeb4ya]

Wow! there's some quality repair work!

Gotta go to steel and get it back to the factory connections.

[JBNeal]

I had a similar leak issue with the brass fitting on the MC awhile back...

[Young Ed]

AAAHHHH run from the copper! I'd check now and make sure there are no other copper lines. 

[Brent B3B]

way to pay attention to your truck Mike! that could have been a bigger deal  

[RobertKB]

6 hours ago, Young Ed said:

AAAHHHH run from the copper! I'd check now and make sure there are no other copper lines. 

 

Gotta agree!!

[ggdad1951]

12 hours ago, Young Ed said:

AAAHHHH run from the copper! I'd check now and make sure there are no other copper lines. 

 

but don't run FROM Copper/nickel....run TO it!

[Young Ed]

1 hour ago, ggdad1951 said:

 

but don't run FROM Copper/nickel....run TO it!

Yes good call out on that!  Worked very well on FEF and I plan to use it on my 47 project. 

[Mike 1948 1Ton]

Good point, I will do a closer look at the lines to see if there is more copper. This little line actually goes to the brake lock solenoid (which doesn't work) so I think this could be the only copper piece (I hope).

 

Thanks for the comments!!!

 

Mike