DETAILED CONTROLS AND GAUGES OPERATION
3-154
Action When Proximity Switch Has Failed
When the following procedure is used to disconnect the connector of the proximity switch and connect it
to another connector, the PPC (hydraulic pilot) lock is always released, so it will be possible for the
machine to move.
This change in the combination of the connectors is a temporary measure to enable the machine can be
moved to a safe place. After moving the machine, contact your Komatsu distributor immediately and ask
for repairs to be carried out.
The machine can move, so this is extremely dangerous. For this reason, when carrying out this operation,
always set the hydraulic ladder to the stowing position and fix the ladder lowering prevention chain to the
hook on the machine.
When the changing the combination of the connectors, be careful not to mistake the connections.
1. Turn the starting switch to the OFF position, remove the key, wait for approx. 1 minute, then remove the nega-
tive (-) terminal of the battery.
2. On the right side inside the cab base room there is the con-
nector for the PPC (proportional pressure control pilot)
lock.
3. Remove bolts (1) and (2) of the clamp holding the connec-
tor cable.
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