Vehicle recall 91V124000 · July 23, 1991
1988-1991 E-One Hush
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.
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- 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.
- Remedy
- 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.
Recall details
- NHTSA campaign
- 91V124000
- Reported to NHTSA
- July 23, 1991
- Filed by
- E-ONE, INC.
- Owner notification
- July 26, 1991
- Vehicles potentially affected
- 91
- Initiated by
- NHTSA’s Office of Defects Investigation
- Components
- Unknown or other
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
- E-One Hush (1988-1991): 1991, 1990, 1989, 1988
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