1990 Volvo 240DL

I just completed a caliper, rotor, and brake pad replacement, and am now changing the brake fluid and bleeding the system.

The MC reservoir has all new fluid in it. I started with the Bentley sequence - the left rear caliper. No fluid came out.

I then went to the other 7 bleeder valves to test them. I am getting fluid from each, some a bit slower than others due to air still in the system. Some were starting to flow nicely. I expect the others will with a few more pump-pump-holds.

I then returned to the left rear caliper. Again, no fluid coming out. My helper did note that when I open the bleeder screw, that the brake pedal would go down in a few seconds. Close the bleeder, pump and hold again, and again the pedal will go down. But again, no fluid coming out of the bleeder screw.

I could bleed the rest of the system, less this 1 caliper. But I do not think this makes any sense if I can not get fluid flowing to the problem left rear caliper.

What might the problem be, and how best to proceed?

thanks

 

Did you replace the left rear caliper? I'm thinking there is either an obstruction in the caliper or the line feeding it. Easiest test is to remove the caliper and go to a shop and have them blow compressed air through it.

 

Oops, my omission. All work was done on the front end. I knew I had a bad caliper on the right front end, and pads were almost gone.

The back end was ok (good pads, etc.) when I last used the car 6 months ago.

 

Unscrew the bleeder completely and see if you get flow when depressing pedal. It is not uncommon for debris to lodge in the bleeder, either from the inside or outside of the bleeder. More than once I've had to attack a bleeder with a piece of wire to clean it out.

Regards, Andrew.

 

Loosen the hyd. line going into the caliper with pressure on the pumping the pedel. If fluid comes out the you know that you have pressure going into the caliper. There is not many parts in caliper 2 o ring and a puck for each side.

Cb