Komatsu 830E-AC, Shop Manual

Page: 46 / 1085

A3-32 General Safety and Operating Instructions 3/06 A03030
DELAYED ENGINE SHUTDOWN
PROCEDURE
1. Stop the truck out of the way of other traffic.
Park on a level surface, free of overhead power
lines or other objects that could prevent raising
the dump body.
a. Reduce engine speed to low idle.
b. Move the directional control lever to PARK.
This will apply the parking brake.
c. Be sure the parking brake applied indicator
light in the overhead display panel is illumi-
nated.
2. Place the rest switch in the ON position to put
the AC drive system in the rest mode. Be sure
the rest indicator light in the overhead panel is
illuminated.
3. Refer to Instrument Panel and Indicator Lights
in Section 32 for location of the engine stop
switch with five minute idle timer delay. This is a
3-position rocker-type switch (OFF-ON-
MOMENTARY).
4. Press the top of the engine
shutdown switch to select the
ON (center) position. Press
the top of the switch again to
activate the timer delay
(MOMENTARY position).
Release the switch and allow
it to return to the ON position.
When the engine shutdown
timer has been activated, the
timer delay indicator light in
the overhead status panel will
illuminate to indicate that the
shutdown timing sequence
has started. The engine will
continue to idle for approximately five minutes
to allow for proper engine cool-down before
stopping.
5. Turn the key switch counterclockwise to the
OFF position to cause the engine to stop when
the timing sequence is complete. When the
engine stops, the hydraulic bleed-down timer
will activate and the 24 VDC electric circuits will
turn off.
6. With the key switch OFF and engine stopped,
wait at least 90 seconds. Ensure the steering
circuit is completely bled down by turning the
steering wheel back and forth several times. No
front wheel movement will occur when hydraulic
pressure is relieved. If the front tires continue to
steer after the engine has stopped, notify main-
tenance personnel.
7. Verify all link voltage lights are off (one on the
back side of the center console inside the oper-
ator cab, two on the electrical cabinet), and
notify maintenance personnel if the lights
remain illuminated longer than five minutes
after the engine is shut down.
8. Close and lock all windows. Remove the key
from the key switch and lock the cab to prevent
possible unauthorized truck operation. Properly
dismount the truck. Put wheel chocks in place.
NOTE: To cancel the five minute idle timer
sequence, press the timer delay shutdown switch to
the OFF (lower) position.
• If the key switch is in the OFF position, the
engine will stop.
• If the key switch is in the ON position, the engine
will continue to operate.
If engine does not stop with the key switch, use
engine stop switch on operator cab center console.
Pull the switch up to stop the engine. Push the switch
back down to enable engine operation.
The ground level shutdown switch will also stop the
engine during this time.