SEATS
VEHICLE DESCRIPTION: SCHOOL BUSES EQUIPPED WITH BOSTROM DRIVER'S SEAT MODEL F222 OR BOSTRUM "ROUTEMASTER" SEAT. BLUE BIRD OPTION 2821 OR 2824. THE SEAT PEDESTALS ARE FATIGUE CRACKING ADJACENT TO THE WELD WHICH SECURES THE PEDESTAL'S UPPER PLATE TO THE UPPER, TELESCOPING PORTION OF THE ADJUSTABLE COLUMN SUPPORT.
Remedy: DEALERS WILL REPAIR THESE PEDESTALS WITH A NEWLY DESIGNED PEDESTAL BRACKET KIT.
11,371 vehicles affected
ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN
A SUDDEN HYDRAULIC PRESSURE LOSS DURING HARD TURNS RESULTS IN A MOMENTARY LOSS OF POWER STEERING ASSIST. THE PRESSURE LOSS OCCURS WHEN THE HYDRAULICALLY DRIVEN ENGINE COOLING FAN TURNS OFF IN THE TURN.
Remedy: THE HYDRAULIC CONTROL VALVES WILL BE REPLACED WITH VALVES OF A NEW DESIGN. UNTIL SUCH TIME AS PARTS ARE AVAILABLE, OWNERS WILL BE INSTRUCTED TO DISCONNECT THE FAN CUTOFF SWITCH SO THAT HYDRAULICALLY DRIVEN FANS WILL RUN FULL TIME, ELIMINATING THE PRESSURE SPIKE.
1,500 vehicles affected
SUSPENSION:FRONT:WHEEL BEARING
THE WHEELBEARING LOCKNUT AND COTTER PIN WERE NOT INSTALLED ON THE FRONT AXLE HUBS. THE CAN CAUSE A GRADUAL INCREASE IN WHEEL SHIMMY.
Remedy: REPAIR KITS WILL BE FURNISHED TO OWNERS AND REIMBURSEMENT FOR LABOR AND MATERIALS WILL BE MADE.
681 vehicles affected