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NHTSA Campaign 79V077000

SERVICE BRAKES, AIR:ANTILOCK:CONTROL UNIT/MODULE

Issued by FORD MOTOR COMPANY · Reported Mar 29, 1979 · 65,000 vehicles affected

What's wrong

CERTAIN AIR BRAKE ANTI-LOCK MODULATORS COULD MALFUNCTION DURING OPERATION OF THE ANTI-LOCK SYSTEM. A NYLON PISTON WITHIN THE MODULATOR AIR VALVE SYSTEM CAN SWELL FROM EXPOSURE TO SYSTEM CONTAMINANTS. CONTINUED EXPOSURE MAY CAUSE THE PISTON TO SWELL TO THE EXTENT THAT INTERFERENCE WITH THE CYLINDER WALL WILL RESULT, CAUSING MOMENTARY STICKING OR A PERMANENT JAM. THIS CAN RESULT IN TEMPORARY OR PERMANENT LOSS OF BRAKING FOR THE AFFECTED AXLE.

Remedy

THE PISTONS IN THE VALVE PORTION OF THE MODULATORS WILL BE REPLACED WITH PISTONS THAT DO NOT SWELL WHEN EXPOSED TO AIR BRAKE SYSTEM CONTAMINANTS.

Vehicles affected by this recall

Make Model Year Units
FORD B SERIES 1975 65,000
FORD B SERIES 1976 65,000
FORD B SERIES 1977 65,000
FORD B SERIES 1978 65,000
FORD B SERIES 1979 65,000
FORD C SERIES 1975 65,000
FORD C SERIES 1976 65,000
FORD C SERIES 1977 65,000
FORD C SERIES 1978 65,000
FORD C SERIES 1979 65,000
FORD CL SERIES 1975 65,000
FORD CL SERIES 1976 65,000
FORD CL SERIES 1977 65,000
FORD CL SERIES 1978 65,000
FORD CL SERIES 1979 65,000
FORD F SERIES 1975 65,000
FORD F SERIES 1976 65,000
FORD F SERIES 1977 65,000
FORD F SERIES 1978 65,000
FORD F SERIES 1979 65,000
FORD L SERIES 1975 65,000
FORD L SERIES 1976 65,000
FORD L SERIES 1977 65,000
FORD L SERIES 1978 65,000
FORD L SERIES 1979 65,000
FORD W SERIES 1975 65,000
FORD W SERIES 1976 65,000
FORD W SERIES 1977 65,000
FORD W SERIES 1978 65,000
FORD W SERIES 1979 65,000

Source: NHTSA Campaign 79V077000 on nhtsa.gov. To check the current repair status for a specific vehicle, use our free VIN decoder.