Komatsu 730E, Shop Manual

A03048

General Safety & Operation

A3-25

NOTE: If the truck is equipped with an engine
prelube system, a noticeable time delay will occur
(while the engine lube oil passages are being filled)
before the starter engages. The colder the engine oil
temperature, the longer the time delay. In addition, if
the truck is equipped with an engine starting aid for
cold weather starting, the engine prelube system
must be engaged for 5-10 seconds, or until the
starter is engaged, before activating the engine
starting aid.

Starting fluid is extremely volatile and flammable!
Use with extreme care.

If the truck is equipped with the optional engine start-
ing aid and the ambient temperature is below 10°C
(50°F), turn the key switch to the START position.
While cranking the engine, move the engine starting
aid switch to the ON position for three seconds maxi-
mum, then release the engine starting aid. If the
engine does not start, wait at least fifteen seconds
before repeating the procedure.

DO NOT crank an electric starter for more than thirty
seconds at one time. Allow two minutes for cooling
before attempting to start the engine again. Severe
damage to the starter motor can result from over-
heating. 

AFTER ENGINE HAS STARTED

1. Become thoroughly familiar with the steering

and emergency controls. After the engine has
started and the low pressure and warning sys-
tems are normal, test the truck steering in
extreme right and left directions. If the steering
system is not operating properly, shut the
engine off immediately. Determine the steering
system problem and repair before resuming
operation.

2. Check the brakes before moving the truck. Start

the engine and allow the hydraulic system to
fully pressurize. Activate the service brake, park-
ing brake, and brake lock at least twice. If a
warning alarm is activated when a brake is
applied or released, DO NOT operate the truck.
If the application and release of any brake
appears slow or improper, DO NOT operate the
truck. If a brake problem is suspected, shut the
engine off and notify maintenance personnel.

3. Check the gauges, warning lights, and instru-

ments before moving the truck to ensure proper
system operation and proper instrument func-
tioning. Observe the braking and steering circuit
hydraulic warning lights. If the warning lights
come on, shut the engine off immediately and
determine the cause.

4. Ensure the headlights, work lights, and taillights

are in proper working order. Good visibility may
prevent an accident. Check the operation of the
windshield wipers.

5. When the truck body is in the dump position,

DO NOT allow anyone beneath it unless the
body-up retaining cable is in place.

6. DO NOT allow unauthorized personnel to ride

in the truck. DO NOT allow anyone to ride on
the stairs or ladder of the truck.

7. DO NOT leave the truck unattended while the

engine is on. Shut the engine off, and apply the
parking brake before getting out of the cab.