My dad has owned this truck for yrs now as it sat for quite some time also. I believe it used to be able to brake b4 it stopped running. Problems are: (1) Were able to pump up the brake pedal once or twice receiving a hard brake pedal! But after leaving it alone for awhile we notice a noticable amount of brake fluid within the master cylinder gone and the brake pedal goes down to the floor b4 pumping it back up again.Note: No visible signs of fluid were to be found throughout the whole truck!!! From the floor/inside of tires/master cylinder/frame rail lines and so on.Note: All I noticed was a kink in the rear brake line on the drivers side but no leaks were found there either! Please, could someone knowledgeable tell us where this fluid is going and what is the problem here. And how to take steps to resolve our problem? Thankyou so much for your time.
sounds like the master cylinder. if you have no booster then if the rear seal is leaking then it can leak on the floor. i had a 74 ford truck that leaked on the floor.
Hmmmm,, just a guess, but I would check the INSIDE firewall (under the dash directly behind the brake pedal) your master cylinder may be leaking with the brake fluid coming inside your truck rather than dripping on the ground. Does your truck have a rubber floor mat or carpet? try looking under that. There may be a small enough leak in one of the wheel cylinders, but the fluid may not have leaked enough to run out to Create a puddle on the ground yet. But like you said there is a possibility there isn't a leak at all, but rather when you pumped the brakes you are re-filling the wheel cylinders after sitting for a long period of time. I would recommend that you replace all the brake fluid anyway, after sitting for so long your brake fluid system is likely to have water in it. Hope this was helpful to you.
I allways use a straigh edge
It could be leaking into the vacuum booster. Be sure to check EVERY fitting, hose, and connection, along with all of the wheel cylinders/calipers.
