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Operating Instructions - Section 30
Page 30-6
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 pressure: Verify that
the low accumulator charge 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
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 truck passes this test, the emergency
steering system is functioning properly.
warning
light
is
it
is
not
illuminated,
personnel.
Do
not
accumulators
are
not
AFTER THE ENGINE HAS STARTED
After the engine has been started, operate at approx-
imately 1000 rpm, until the coolant temperature
gauge is indicating "normal" (green) range.
Become thoroughly familiar with the steering, brak-
ing, and emergency controls.
During the following safety checks, if actuation
or release of any steering, brake or emergency
control circuit does not appear normal, shut the
engine down, immediately, and notify mainte-
nance personnel. Do not operate the truck until
the system in question is fully operational.
Ensure the area around the truck is clear before
testing.
Steering
1. Test the truck steering in extreme right and left
directions. If the steering system is not operat-
ing properly, shut the engine off, immediately.
Determine the problem, and repair before
resuming operation.
NOTE: The steering and brake systems each have
two accumulators that store energy and provide
capability to steer and stop the truck in the event of
an unexpected engine shutdown or pump failure.
As part of the routine maintenance of the vehicle,
one requirement to ensure proper operation of each
system is to maintain proper accumulator nitrogen
pre-charge. Refer to the shop manual for proper
procedures when charging the accumulators.
03/13 OM3040
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