Spongy brakes

[the_goat_man]

Ok so I have a 66 with drums all the way around. The breaks are real soft bled them mult times no change. They are none power and master is one line out. I think the wheel cylinder is bad could this be right. They go down slow and hold after remove foot from petal

[Sharps40]

Either air in the lines, shoes too far away from the drums or bum master.

Spongey indicates air.

Pedal stayin down indicates bum master and/or broken pedal return spring.

[the_goat_man]

The petal comes back up the brakes don't release fast

[Sharps40]

Board could use more info....new parts? if so where? All old stuff?, etc.

If its old stuff it could be just all gummed and rusted up.

Some more details on what yer working, betcha couple others pop in here and help ya get it figgered pretty quick.

My guess is yer workin over one that's been laid up a while?

[the_goat_man]

It's all old stuff maybe in the last 6 years they have been changed. They are not to rusty I was going to change the cylender and see what happens. Any other pices I should change shoes are still good. Don't want to do to much just want to get truck driving so I can enjoy it before I go on deployment. Rock auto has them for 6$ a pice.

[Sharps40]

If the pistons in the slow cylinder are good I'd try a rebuild kit in that one first. Like 3 bucks at oreilly. I suggest that first since changing the cylinder often results in a cracked line

[tincan1966]

A suggestion is to do wheel cylinders like shocks- always repair or replace in pairs(either both front or both rear) at the same time.
A pedal that goes down slow and not returning or making the brakes stay applied sounds like a collapsed rubber brake hose- and is normally the rear one that fails first. easy to tell- after hitting the brakes, and releasing the pedal, does the truck seem to pull to one side or the other? Or does is seem like it is dragging something?
Whichever side it pulls to would be the defective side. If dragging to the rear, it would be the rear hose.
Depending on your plans(if adding disc brakes in the future, etc) I'd replace the hoses-they're cheap enough. Also if needed install new wheels cylinders- they are about $10-12 each and a quicker repair. You can rebuild all four corners with new shoes, wheel cylinders and hoses for about $150. Another $25-35 will get you the dual master cylinder and steel lines needed to split the front and rear brakes from the one line system, and you'd have great brakes and a safe truck.
There is absolutely no reason to go cheap on brakes-it's a safety thing.

[Sharps40]

What he said +1