Today I tried to bleed my rear master cylinder with no luck, the pedal still goes to the floor. When I push down the pedal with the bleeder valve open only a little fluid comes out, is this correct? The reservoir is full of fluid. What is the best way to bleed the brakes or is my master cylinder bad?

 

Sometimes takes a while to completely bleed the rear brakes. If you go through about three reservoirs full of fluid while bleeding and either air is present in the fluid or you just can't get a firm pedal,possibly the small master cylinder needs to be replaced(they do go out and suck air or just can't build up pressure) plus make sure you have good brake pads or it's also hard to bleed properly. OPT

 

When I push the pedal only a little fluid comes out of the bleeder valve, is that ok???

 

There wont be a gush of fluid because of the small master cylinder. Just takes patience to bleed the rear brakes. If like I said after about 3 reservoir bottle of fluid is used(top off between bleeding) you can't get a firm pedal,it may be a leaking master cylinder. Another way to bleed is to use a vacuum bleeder to pull the fluid through. Pump the vacuum bleeder while attached to the bleed valve and keep pushing the pedal with your other hand. OPT

 

I used a bleeder pump and the rear brakes work great, thanks for the help!!!

 

My rear brake pedal also goes to the floor with no resistance. I thought maybe a leak, and no fluid. I put just a small amount in the funnel I was using, and it ended up running out everywhere, and the fill tube was to thje top. What level should the fluid be. It didn't take much if any so I don't think it was low. I never use the reat brake, so I don't know why the master cylinder would be bad. I'll try bleeding the line, but I don't think it has air in it.

 

That's why they don't work if you never use them! You have to bleed the system and then use the rear brakes occasionally to keep the small master cylinder seals pliable. If you don't they just loose pressure and allow air in. If you can't get the rear brakes to bleed properly even with a brake bleeder then you may have to replace the small master cylinder. OPT

 

Thanks tech. Got them to bleed, and they are working now. Just wanted them to work for an "in case" when we are at H/M in a couple weeks.

 

another trick some have used(me included) is to place a weight on the pedal over night and sometimes the pressure will come back after a few pumps. speaking from experince(4 days ago) i had to completely bleed the rear caliper(hand and foot) when i replaced the piston and seals in the rear and it does take alot to get the air outand you do ahve to do both if you have an issue w/ both hand and foot brake. as mentioned if you use the foot brake once in awhile, it does help keep it working better.