I went over my quad on Saturday evening before heading out for the seasons first real ride on Sunday, and my rear brake was like mush.....GRRRR.....

I checked the fluid level on the rear Master Cylinder, and it was fine, I then checked the fluid on the Hand brake and it was fine.

I bled off the entire system, starting with the rear first and did not get any air, just fluid trickleing out.... Still mush....GRRRRRR

I then bled the rear using the hand brake, then the front right, and front left (there was no air in the front). I then topped off the fluid in the hand brake MC and still mush......GRRRRRRRRRRR

I don 't do much riding in mud (well until yesterday), does anybody have an idea what the problem would be?? Caliper stuck, need for new pads??? Rear MC shot???

When I bled them off earlier this year it worked fine.....GRRRRRRRRRRRRRRRRRRRR

Any help would be appreciated!!!
ZMan079

 

bring it to the dealer for warranty...same thing happened on mine it turned out to be a brake line and a master cylinder

 

BIGCHEVROLET,

Mine is way out of warranty!!!!

Was it the rear or front master cylinder??? Which brake line needed replaced????


Thanks,
ZMan

 

rear brake lin and master cylinder....infact it is ogiong to go back to the dealer soon because the brake drained down yet once more. front brakes work fine....

 

Hey ZMan079. Just so you understand.. The rear brake foot pedal and hand brake hydraulics are separate and they need to be bled separately. So just because the rear brake pedal doesn't work doesn't mean the hand brake doesn't apply the rear brake. If you want to test them, you should jack the rear of the quad in the air and apply the hand brake to test the rear brake. Then as a separate test, apply the foot pedal to test the rear brake.
I hope this helps you.
BryceGTX

 

Also, there is a separate reservoir for the rear brake, it is right near the pedal. I had the same problem last week, and I bled it and it was still all mushy, but now this week it is much better. I don't know why, but it sat for a week after I bled it and now it locks up the back tires.

 

BryceGTX,

That is a good suggestion!!! I know the back won't do a thing as fara as stopping, I'll have to pull the wheel and check for caliper movement. I'll have to verify, but I do believe the front hand brake does make the rear wheel stop

ZMan079