Compensator Port Check

Compensator Port Check
If it is believed that the brake master cylinder is failing to return to the fully released position, proceed as follows: Raise the front of the vehicle and support it on safety stands. With the brakes off, attempt to rotate both front wheels by hand. To minimize brake pad drag, rock the wheel on the wheel hub as it is rotated. If an excessive amount of brake drag is apparent on both wheels, the brake master cylinder may not be returning to the released position. If an excessive amount of brake drag is apparent at only one wheel, it indicates a possible seized caliper piston. Check the BPP switch adjustment to make sure the switch is not holding the brake pedal in the partially applied position. Loosen the nuts attaching the brake master cylinder to the power brake booster, and pull the brake master cylinder away from the power brake booster, If the brake drag disappears, install a new power brake booster. If the cylinder brake drag continues, install a new brake master cylinder.