1989 E-ONE HUSH Recall

Campaign:

91V124000 on 07/30/1991

Component:

Unknown or other

Manufactured:

06/30/1988 - 04/30/1991

Affected:

91

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.

Correction:

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.

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