CHAPTER 8 – ELECTRICAL SYSTEM
8-4
The Limp-Home is a safety operation mode that permits
the operator to move the machine in case of a failure on
the transmission control system.
If a failure occurs, the transmission can operate on one
forward or reverse gear only. In some cases, depending
on the density of the failure, operation will be possible on
one direction only.
If a failure occurs, the Transmission Control Unit (TCU)
will select automatically the Neutral position. The operator
should maintain the engine running at low idle (or below
1600 rpm), put the selector lever in Neutral position, de-
crease the speed of the machine to a value lower than the
gears engagement limit 4,0 km/h (2.5 mph) and select “F”
or “R”, depending on the operation requirement. After the
speed decrease, when forward or reverse is selected, the
Limp-Home gear will be engaged.
If the operator desires to alter the travel direction of the
machine to the Limp-Home condition, he can just change
the selector lever from “F” to “R” or vice versa, since the
speed is lower than the limit of the gears engagement. If
the speed is higher than this limit, the operator must de-
crease the speed, put the selector lever again in Neutral
and select the desired direction.
1
2
ACCESS LATERAL DOOR1.
ZF TRANSMISSION CONTROL MODULE2.
TRANSMISSION AUXILIARY SYSTEM
Limp-Home (LF and LR)
845B / 865B / 885B MODELS WITH ZF TRANSMISSION
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