1967 bake master cylinder bleeding

[Donald O.]

This question is directed about 1967 dual reservoir, 1" bore, non power brake, master cylinder

What is the correct method of bench bleeding a new master cylinder?

put the MC in a vise, fill the reservoir with fluid, attach hoses to the bleeder ports and operate the piston in the rear?

put the MC in a vise-level, fill the reservoir with fluid, attach hoses to the brake line ports and operate the piston in the rear?

put the MC in a vise-nose elevated as installed in the car, fill the reservoir with fluid, attach hoses to the brake line ports and operate the piston in the rear?

put the MC in a vise-nose with the nose lower opposite of installed in the car, fill the reservoir with fluid, attach hoses to the brake line ports and operate the piston in the rear?


I ask as I have not found this information in the service manual or the chassis overhaul manual.

Don

[Joe L.]

Re: 1967 bake master cylinder bleeding

This question is directed about 1967 dual reservoir, 1" bore, non power brake, master cylinder

What is the correct method of bench bleeding a new master cylinder?

put the MC in a vise, fill the reservoir with fluid, attach hoses to the bleeder ports and operate the piston in the rear?

put the MC in a vise-level, fill the reservoir with fluid, attach hoses to the brake line ports and operate the piston in the rear?

put the MC in a vise-nose elevated as installed in the car, fill the reservoir with fluid, attach hoses to the brake line ports and operate the piston in the rear?

put the MC in a vise-nose with the nose lower opposite of installed in the car, fill the reservoir with fluid, attach hoses to the brake line ports and operate the piston in the rear?


I ask as I have not found this information in the service manual or the chassis overhaul manual.

Don

Don------


I do it from all three m/c cylinder positions-----tilted up, tilted down, and level. Bleed from outlet ports back into the reservoir. You can obtain an inexpensive bleeder kit for this.

[Duke W.]

Re: 1967 bake master cylinder bleeding

...had to do this recently for a neighbor's '77 Corvette, but didn't have much in the way of tools/equipment available. I held the m/c firmly on a 2 x 4 against is driveway with the outlets pointed at a rectangular container tipped on end. He used a #2 Phillips screw driver slowly push the m/c piston to the bottom, then I blocked the ports with my fingers (this is very important), and he slowly released the piston... took about four cycles to get a solid stream of fluid. We installed the cylinder and flushed the entire system with no problems.

You can also do it like Joe said, but you have to be careful because the fluid comes out in a very strong stream and can splash all over. In the case of this '77 we just wanted to do it quick and easy, and even though our method was not real elegant, it did the job in a couple of minutes, and we only spilled a few drops of fluid on the driveway that we soaked up with a wet sponge.

Duke

[Joe L.]

Re: 1967 bake master cylinder bleeding

...had to do this recently for a neighbor's '77 Corvette, but didn't have much in the way of tools/equipment available. I held the m/c firmly on a 2 x 4 against is driveway with the outlets pointed at a rectangular container tipped on end. He used a #2 Phillips screw driver slowly push the m/c piston to the bottom, then I blocked the ports with my fingers (this is very important), and he slowly released the piston... took about four cycles to get a solid stream of fluid. We installed the cylinder and flushed the entire system with no problems.

You can also do it like Joe said, but you have to be careful because the fluid comes out in a very strong stream and can splash all over. In the case of this '77 we just wanted to do it quick and easy, and even though our method was not real elegant, it did the job in a couple of minutes, and we only spilled a few drops of fluid on the driveway that we soaked up with a wet sponge.

Duke

Duke------


The master cylinder bleeding kits contain a clip which keeps the end of the hoses fixed and submerged in the master cylinder reservoirs. These kits are very inexpensive. All they contain are plastic fittings for the outlet ports, clear tubing, and the clip I mentioned.