TM-9-2320-346-10
TRUCK, COMMON BRIDGE TRANSPORT (CBT), 8X8 M1977A4 W/WINCH AND M1977A4 W/O WINCH
TECHNICAL MANUAL; OPERATOR'S MANUAL
OCTOBER 2008
TM-9-2320-346-10 - Page 793 of 1184
WARNING
When operating the vehicle in the transmission limp home mode,
the operator must not rely on the parking brake to hold the vehicle
in place. The service brakes must also be applied. Failure to com-
ply may result in injury or death to personnel.
NOTE
The operator should consider the following guidelines carefully
with regard to type of mission, environment, terrain, etc., when de-
ciding on whether to continue the mission, deadline, or return
vehicle to field level maintenance.
(2) No additional damage to the transmission will occur. The operator can continue
to operate vehicle in the limp home mode and complete mission. However, the
operator must be aware of the following guidelines:
(a) DO NOT shut off engine until the decision is made to deadline vehicle.
Once the engine is shut off, the vehicle will not be operable until the problem
is corrected.
(b) As the engine cannot be turned off and the transmission is locked into gear,
the operator will not be able to leave the cab until vehicle is deadlined.
(c) The vehicle will not be able to operate in R (reverse).
(d) Depending on gear range the transmission is locked into, the operator may
not be able to drive vehicle up steep grades. (WP 0057)
(e) The service brake pedal (2) may need to be applied slightly earlier than
normal when stopping the vehicle.
(f) Depending upon gear range the transmission is locked into and the terrain
the vehicle is operating in, the engine and/or transmission may overheat.
The operator must closely monitor the engine coolant temperature gauge
(4) and the transmission oil temperature gauge (5).
CAUTION
If overheating occurs when operating in the transmission limp
home mode, the operator should stop the vehicle (do not shut
off engine), and allow the transmission and engine to cool down
to normal operating levels. If the engine and transmission do
not cool down, or overheating reoccurs, the operator should
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