Campaign 90V-079

Low air warning pressure switch may not activate the warning signal until pressure has dropped to 55 psi, rather than at the required 60 psi

Defect summary

LOW AIR WARNING PRESSURE SWITCH MAY NOT ACTIVATE THE WARNING SIGNAL UNTIL PRESSURE HAS DROPPED TO 55 PSI, RATHER THAN AT THE REQUIRED 60 PSI.

Consequence

DRIVER WOULD NOT RECEIVE PROPER WARNING OF LOW AIR PRESSURE IN AIR BRAKE SYSTEM AND THIS CONDITION COULD RESULT IN A VEHICLE CRASH; ALSO, VEHICLE WOULD NOT COMPLY WITH FMVSS 121.

Remedy

REPLACE INAPPROPRIATE AIR WARNING PRESSURE SWITCHES.

Notes

SYSTEM: AIR BRAKES; LOW AIR PRESSURE WARNING SWITCH - FMVSS 121.VEHICLE DESCRIPTION: CLASS 8 TRUCKS AND TRUCK TRACTORS.

Source: NHTSA ODI recalls file, campaign 90V079000. Text as published by NHTSA.

Vehicles covered

3 product lines are covered

Owner complaints filed with NHTSA about brakes on these vehicles: 0, of which 0 involved a crash, fire, injury or death. Complaints are not verified by NHTSA.

Vehicles covered by campaign 90V-079
Make	Model	Model years
Marmon	57L	1988 to 1990
Marmon	57P	1988 to 1990
Marmon	86P	1988 to 1990

Source: NHTSA ODI recalls and complaints files. Equipment, tire and child-seat campaigns list products, not vehicles.