Safe Parking Procedures; Engine Shutdown Procedure; Delayed Engine Shutdown Procedure - Komatsu 730E Operation & Maintenance Manual

Operation - Section 30
Page 30-10
3. Empty all material from dump body of truck that
is to be towed.
4. Determine that the towing vehicle has adequate
capacity to both move and stop the towed truck
in all conditions.
5. Inspect the tow bar. The tow bar capacity must
be approximately 1.5 times the gross vehicle
weight of the truck being towed.
6. Block the disabled truck to prevent movement
while attaching the tow bar.
7. Release the disabled truck brakes and remove
the wheel chocks.
8. Sudden movement may cause tow bar failure.
Smooth and gradual truck movement is preferred.
9. Minimize the tow angle at all times. DO NOT
exceed 30°. The towed truck must be steered in
the direction of the tow bar.

SAFE PARKING PROCEDURES

The operator must continue the use of safety precau-
tions when preparing for parking and engine shut-
down.
In the event that the equipment is being worked in
consecutive shifts, any questionable truck perfor-
mance the operator may have noticed must be
checked by maintenance personnel before the truck
is released to another operator.
1. Park the truck on level ground, if possible. If
parking on a grade, position the truck perpen-
dicular to the grade.
2. Apply the parking brake and install wheel
chocks so that the truck cannot roll. Park each
truck a safe distance from one another.
3. Haul roads are not safe parking areas. In an
emergency, pick the safest spot most visible to
other machines in the area. If the truck becomes
disabled, mark the truck with warning flags in
daylight, or flares at night.

ENGINE SHUTDOWN PROCEDURE

The following procedure must be followed at each
engine shutdown.
1. Stop the truck. Reduce the engine rpm to low
idle. Place the selector switch in NEUTRAL and
apply the parking brake switch. If the engine
shutdown with timer delay is preferred, refer to
the Delayed Engine Shutdown procedure.
2. Allow the engine to cool gradually at low idle for
three to five minutes.
3. With the truck stopped and the engine cool, turn
the key switch counterclockwise to OFF for nor-
mal shutdown of the engine. If the engine does
not shutdown with the key switch, use the
engine shutdown switch on the center console
(see Operator Controls section).
4. With the key switch OFF and the engine
stopped, wait at least 90 seconds. Ensure the
pressure is relieved in the steering circuit by
turning the steering wheel back and forth sev-
eral times. No front wheel movement will occur
when hydraulic pressure is relieved.
5. Close and lock all windows, remove the key
from the key switch, and lock the cab to prevent
possible unauthorized truck operation. Dis-
mount the truck properly.
DELAYED ENGINE SHUTDOWN
PROCEDURE
Refer to Section 32, Operator Cab and Controls, for
identification of the various switches and indicator
lights.
1. Stop the truck. The truck must be away from
other traffic, on a level surface, and away from
overhead power lines or other obstructions.
2. Reduce the engine speed to low idle.
3. Place the selector switch in NEUTRAL.
4. Apply the parking brake switch. Ensure the
parking brake applied indicator light in the over-
head display panel is illuminated.
5. Move the top of the engine shutdown switch to
the ON (center) position. Then, firmly press the
switch to the MOMENTARY (upper) position.
Hold this position briefly to activate the five
minute idle timer. The switch is spring-loaded
and will return to the ON position when
released.
OM3043 06/06
Operating Instructions