Service brakes, hydraulic: foundation components: master cylinder
HARLEY-DAVIDSON MOTOR CO. filed this campaign with NHTSA on 1978-07-19.
Recall campaignNHTSA 78V159000
Service brakes, hydraulic: foundation components: master cylinder
Component
Service brakes, hydraulic: foundation components: master cylinder
Manufacturer
HARLEY-DAVIDSON MOTOR CO.
Vehicles affected
342
Reported to NHTSA
1978-07-19
Owners notified
1978-08-11
Defect description
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.
Manufacturer remedy
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.
Safety recall repairs are provided free of charge by franchised dealers, regardless of vehicle age or mileage. This page displays aggregated data for the model year. To check recall status for a specific vehicle, search its VIN at nhtsa.gov.