booster for brakes

i have a 87 pup and at times the brake peddle goes to the floor,i checked the lines and fluids and it was good i siliconed one end of the vacum hose it seemed to make lil differance i was wondering if there is anything else i can do before replacing it?

Reply to
yarddogg02
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Possibly an internal leak in the master cylinder.

Reply to
BOB

ok thank you

Reply to
yarddogg02

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