Komatsu PC22MR-3, Operation & Maintenance Manual

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FUNCTIONING
INSTRUMENTS AND CONTROLS
3-9
Warning lights 3
(1) Engine preheating warning light
This warning light comes on when the ignition key is turned to
the preheating position (HEAT) to start the engine at low
temperatures. It goes out automatically after approximately 18
seconds, when the preheating process has been completed.
(2) Travel speed increase warning light
This warning light comes on when the travel speed selection
switch is in high speed position (see "Travel speed selection
switch (3-12)"). When the selector switch is in normal position
(low speed), the warning light on the control box is off.
REMARK
When the machine travels at high speed on soft ground or up a
slope and the load increases, the low speed is automatically
selected, but the travel speed increase warning light remains
on.
(1) Engine preheating warning light
(2) Travel speed increase warning light
WEAM014500