NHTSA Recall 91V124000
Filed by E-One Incorporated. Component: Unknown Or Other. Reported 1991-07-23. An estimated 91 vehicles are affected. Recall repairs are free at any authorized dealer.
Defect
IN THE EVENT THAT THE PROPER PUMP ENGAGEMENT SEQUENCE IS NOT FOLLOWED THE "OK TO PUMP" INDICATOR LIGHT WILL ILLUMINATE WHEN THE TRANSMISSION IS IN A DRIVE GEAR.
What the manufacturer will do
AN ELECTRONIC CIRCUIT AND MODULE WILL BE INSTALLED TO LOCK-OUT THE PUMP THROTTLE ON ELECTRONICALLY CONTROLLED TRANSMISSIONS IF THE CORRECT LOCK-OUT PROCEDURES ARE NOT CARRIED OUT.
Notes
SYSTEM: FIRE TRUCK WATER PUMPS.VEHICLE DESCRIPTION: FIRE TRUCKS WITH ALLISON ATEC ELECTRONIC TRANSMISSIONS,ALLISON MODELS HT741 AND MT648.CONSEQUENCE OF CONDITION: UNLESS THE TRANSMISSION IS PLACED IN THE LOCK-UP MODEBEFORE THE PUMP IS ENGAGED, THE ENGINE CAN DEVELOP SUFFICIENT POWER TO OVERRIDETHE TRUCKS PARK BRAKES, RESULTING IN VEHICLE MOVEMENT WITHOUT PRIOR WARNING ANDA POSSIBLE ACCIDENT.