Hot Rods Brake problems

I just got a truck in a trade, it has power brakes, dic on front, drums on back. Before I start taking everything apart I have some questions. Does the big line go to the fornt or back, and where on the master cylinder. Do I need both of the vacuum things on the canister.

 

No brake experts, tell me what I have, and any pointers would help

 

The extra thing on the vacuum line looks like a backfire check valve. Most people don't use them.

 

The round black valve into the booster is a vacuum check valve, you need it
The round thing inline is a charcoal canister to keep fuel vapour out of the booster,
The big reservoir on the master is for disc
Small reservoir for your drums
Size of the lines doesn’t really matter as long as it’s plumbed right

 

Thanks I will check the lines tomorrow after work. And take the online filter out.

 

Before you start tossing parts, what "problems" are you having ?

 

The reservoir closest to the firewall is for your front brakes, the other for the rear.


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The larger reservoir no matter if it's in the front or the rear on a disc drum master is always for the front disc.

 

Usually the larger reservoir and the larger brake line goes to the disk brakes. As the pads wear, the pistons move further out so there is more fluid behind them so the fluid level goes down with wear. Drum brakes have springs that return the pistons so the fluid level doesn't go down unless there is a leak. The master cylinder pictured looks like the one on my 90 Chevy pickup. When it started leaking, I had to put 3 new ones on before I got one that worked.

 

What issues are you having

 

There is no leaks showing on the wheels, but when I mash the paddle it acts good then slowly goes down

 

You need to start be pulling the wheels and drums look for leaks
Look at your lines etc.
Sounds like a bad master, a leak ,or air in the system.

What condition is the fluid in? Clear/ black dirty.
If you find no leaks, flush the system and put in new dot 3 or dot 4 fluid and bleed it and check it before replacing anything.

Do one thing at a time so if you fix it, you know what fixed it, and on the flip side if what you did makes it worse you know what to correct.

 

Yep... bypassing internally. Quite insidious if you've never ran across one before.