Leaking brake pipe or connection

Locate and repair the brake pipe or the connection.

Leaking caliper piston seal

Replace caliper piston seal.

Leaking master cylinder (internally)

Repair or replace the master cylinder.

Restricted passage in the vacuum booster

Replace the vacuum booster.

Damaged vacuum booster

Replace the vacuum booster.

Restricted brake fluid passage

Locate and repair the brake fluid passage restriction.

Improper rear brake adjustment

Adjust the rear brake linings.