dukie

Ive been slowly fixing my 1988 Toyota sr5 I can't get it to build up pressure
I've replaced the master cylinder
Majority of the brake lines cuz they were rusted
So no leaks are there
AnywYs I've been bleeding the brakes and there's no air in them. There's no brake peddle either after about 2 or 3 pumps when the truck is off its built up but when I start the truck it won't build at all
Front brake pads have been replaced recently
I've adjusted the rear drums
Any advice or what's my problem thanks much

wyoming9

iTrader: (1)

How are you bleeding the brakes??

With new lines it can take quite a while to get all the air out.

poor connection allowing air to be drawn into the system

Dauphinc

So the pedal goes to the floor? Are you sure the master cylinder is good? Did you bench bleed it?

dukie

Master was bench bled and the pump and hold method.

Dauphinc

The next step that I would do would be to take one of the calipers off and verify that the piston is moving. If not, your problem is isolated between it and the brake master/booster assembly.

wyoming9

iTrader: (1)

Well if you remove the caliper and your getting pressure the piston is going to come flying out.

If your getting fluid out under pressure your drawing air in someplace