System Functions
Safety, Operation and Maintenance Manual - Aug 2012
3-32
SY115C9/135C/155H Crawler Hydraulic Excavator
3.4.2.1
Start switch
Start switch is used to turn on or turn off the
engine.
(A): OFF
It allows you to insert or remove the key. All
switches of the electrical system (except out-
door lights) are off and the engine is shut
down.
(B): ON
The charging and lamp circuits are energized.
Keep the start switch in “ON” position when
operating the engine.
(C): START
This is engine starting position. When starting,
keep the key staying in the position. Release
the key immediately after the engine is started.
The key will return to ON position (B) automat-
ically.
(D): HEAT
This is engine preheating position. Insert the
key and turn it counterclockwise to HEAT posi-
tion. Keep the key in this position to preheat
the engine. Releasing the key, it will return to
OFF position (A) automatically and stops pre-
heating.
C
B
A
D
CZ335-1103036
ON
OFF
HEAT
START
CZ335-1103037
If the engine does not stop at low idle
speed, the service life of engine will be
reduced. Except for emergency, never
shut off the engine while it is running at
high speed, which may otherwise cause
troubles like fatigue cracking on cylinder
cap and damage to bearing of the turbo-
charger.
NOTICE
Fig. 3-30
Fig. 3-31