98IndyPacer

I’m having trouble getting a firm brake pedal after going through about a gallon of brake fluid doing pedal bleeding. I decided to pull the master cylinder to bench bleed. Since I don’t have the bench bleeder fittings (new Wagner master cylinder didn’t come with one) I wanted to make a setup using steel brake lines and a tubing bender.

I have manual brakes on my 1972 small block with 1” bore master cylinder. What sizes are the brake lines that connect to the ports on the master cylinder?

Thanks, Ed

RunningMan373

just go down to the local Autozone or whatever and ask for a bleeder kit, HELP section has one I think, like 5 bucks, come swith about 5 diff fittings. btw the two on the M/C are diff sizes. i got my kit, but it's buried. C.

Project80

Just get the kit, it works very well.

98IndyPacer

Thanks for the replies. I found the master cylinder port sizes today. For the 1972, non-power brake, master cylinder the port sizes are 1/2-20 and 9/16-18. I went to the local AutoZone and they don’t carry the bleeder kit. I did find one at Napa Auto Parts, labeled as Master Cylinder Bleeder Kit with part number 700-1132.

Just finished bleeding the master cylinder, took about 15 strokes to get all of the air out. After installing the master cylinder I will pressure bleed the system using a Motive Pressure Bleeder but how do you remove the plugs, transport to the car and reconnect without getting too much air in the system?

Thanks, Ed

dannyman

Put the cap on the reservoir and then remove the lines. Hook up the vehicle lines before removing the reservoir cap. Then you should be good to bleed the system.

BigBlockTank

When I changed my master cylinder, I installed it, put plugs in the front and rear hose ports. Pumped it until all the air was out, connected lines and bled again thru the wheel cylinders. I don't have a rock hard pedal, but I have power and it works like a champ.

stingr69

Leave the bench bleeder kit installed. Bolt the master cylinder on then the last thing you do is remove the fittings before you hook up the lines. If you have the Motive pressure bleeder you will be finished in no time at all.

-Mark.

98IndyPacer

Thanks for all of the help. I will give it a try this weekend.

Regards, Ed