were the wheel cylinder pistons free?

i have seen pistons stick, allowing on pedal return air to be sucked past the w/cylinder seals, also is the wheel cylinder bleeder screws clear...seen them mudded/ rusted closed not allowing and fluid to escape when opened....crack open the line
at the wheel cylinder to see if fluid comes out when pedal pressed....


My GMC has a bad case of ship fitters disease!
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1958 GMC
1956 Chevy 1500 Hydraulic Dump Truck
1952 Chevy 1700 3-Ton Firetruck

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