Machine Operation Safety Precautions - Komatsu 930E-4SE Operation & Maintenance Manual

OM3062 8/11
4. Turn the key switch to the ON position, but do
not start the engine.
a. Steering system pressure: Verify that the low
steering pressure
illuminated. If
immediately notify maintenance personnel.
Do not operate the truck until the problem is
corrected.
b. Steering accumulator precharge: Verify that
the low accumulator precharge warning light
is not illuminated and the warning buzzer is
not sounding. If the warning light is
illuminated and the buzzer is sounding,
immediately notify maintenance personnel.
Do not operate the truck until the problem is
corrected.
5. Start the engine and allow the steering
accumulators to fully charge. Turn the steering
wheel so that the front wheels are straight.
6. Check the hydraulic tank oil level while the
engine is on.
a. If the oil level is visible in center of the lower
sight glass and does not cover the entire
lower sight glass, the steering accumulators
are adequately charged. Proceed to Step 7.
b. If the oil level is below the lower sight glass,
the steering
adequately charged. Stop the engine and
turn the key switch to the OFF position.
Immediately notify maintenance personnel.
Do not operate the truck until the problem is
corrected.
7. If the steering accumulators are adequately
charged, stop the engine by using the
emergency shutdown switch. Leave the key
switch in the ON position. This allows the
steering accumulators to retain their hydraulic
charge. The low steering pressure warning light
and the low accumulator precharge warning
light should not illuminate.
8. Turn the steering wheel from stop to stop. The
front wheels should turn fully to the left and to
the right. Also, the low steering pressure
warning light should illuminate and the warning
buzzer should sound.
If the front wheels cannot be turned fully to the
left and right, or if the warning light and buzzer
do not activate, immediately notify maintenance
personnel. Do not operate the truck until the
problem is corrected.
If the truck passes this test, the emergency steering
system is functioning properly.
warning light is
it is not illuminated,
accumulators are not
Operating Instructions - Section 30
MACHINE OPERATION SAFETY
PRECAUTIONS
After the engine is started and all systems are
functioning properly, the operator must follow all local
safety rules to ensure safe machine operation.
If any of the red warning lights come on or if any
gauge reads in the red area during truck
operation, a malfunction is indicated. Stop the
truck as soon as possible and turn off the engine.
Have the problem corrected before resuming
truck operation.
The truck is equipped with "slip/slide" control. If
this function becomes inoperative, operating the
truck with stalled or free spinning wheel motors
may cause serious damage to the wheel motors.
If the truck does not begin to move within 10
seconds after depressing the throttle pedal with
the directional control lever in a F or R position,
release the throttle pedal and allow the wheels to
regain traction before accelerating again.
• Always look to the rear before backing the truck.
Watch for and obey the ground spotter's hand
signals before making any reverse movements.
Sound the warning horn (three blasts). The
spotter should have a clear view of the entire
area at the rear of the truck.
• Operate the truck only while properly seated with
seat belt fastened. Keep hands and feet inside
the cab while the truck is in operation.
• Do not allow unauthorized personnel to ride in or
on the truck. Do not allow anyone to ride on the
ladder of the truck.
• Check the gauges and instruments frequently
during operation for proper readings.
• Observe all regulations pertaining to the job site's
traffic pattern. Be alert to any unusual traffic
pattern. Obey the spotter's signals.
Page 30-11