TM 5-2420-230-10
The Electronic Gear Shift (EGS) is used to control the selected gear in the powershift transmission.
The EGS includes a mechanical shift lever, microcomputer, and indicator display integrated into the shift lever housing. The
EGS computer system receives information internally from the shift lever and externally from a speed sensor. This
information, together with acquired vehicle speed information, is used to shift to the requested gear or to prevent the shift. The
shift lever display indicates shift status.
Do not drive or use the vehicle for earth-moving
while in emergency gearshift mode. Failure to
comply may result in damage to equipment.
In the case of a severe EGS malfunction, the gearshift can
be used to select an emergency mode. This is done by the
use of the emergency gearshift switch, located inside the
Power Distribution Panel (PDP) cabinet. Placing the switch
in the emergency position locks the gearbox in second gear,
giving the driving options of forward or reverse in either
high or low range.
This switch must only be used in the event of a malfunction,
to move the vehicle onto a trailer for transport to a suitable
repair location. The vehicle must not be driven or used for
earth-moving or any other operation while the gearbox is in
emergency mode.