NHTSA Recall 78V159000
Filed by Harley-Davidson Motor Company. Component: Service Brakes, Hydraulic. Reported 1978-07-19. An estimated 342 vehicles are affected. Recall repairs are free at any authorized dealer.
Defect
THE INVOLVED MOTORCYCLES WERE MANUFACTURED WITH FRONT BRAKE MASTER CYLINDERS IN WHICH THE PLUNGER PISTON BORE DIAMETER WAS HONED .015 INCHES OVER MAXIMUM SPECIFICATIONS. THIS OVERSIZED BORE RESULTS IN A POOR FIT BETWEEN THE ELASTOMERIC PISTON CUP AND THE CYLINDER BORE, WHICH ALLOWS FLUID LEAKAGE FROM THE HYDRAULIC SYSTEM.
What the manufacturer will do
DEALER WILL INSPECT AND, IF NECESSARY, REPLACE THE FRONT BRAKE MASTER CYLINDER ASSEMBLY AT NO COST TO OWNER.
Notes
VEHICLE DESCRIPTION: MOTORCYCLES.SYSTEM: SERVICE BRAKES; HYDRAULIC SYSTEM.CONSEQUENCES OF DEFECT: FLUID DEPLETION COULD RESULT IN LOSS OF BRAKINGEFFECTIVENESS, LOSS OF VEHICLE CONTROL, AND AN ACCIDENT.NOTE: INSUFFICIENT BRAKE FLUID IN THE SYSTEM MAY BE INDICATED BY FLUID LEAKAGEAROUND THE MASTER CYLINDER AND INCREASED FREE PLAY IN THE HAND LEVER.