Care and Maintenance
106
DANGER
Hot engine coolant is under pressure. Do not
attempt to open the coolant filler cap when the
engine is hot. Allow engine to cool before
adding coolant.
Wheel Bearings
Check wheel bearing cover for overheating
(especially after brake work) during fuel stops by
touching the wheel bearing cover.
Windshield Washer Reservoir
Make sure windshield washer reservoir is full.
For cold weather, use antifreeze windshield
washer fluid.
Engine Oil
Check engine oil level during fuel stops. It is
normal for diesel engines to burn some oil. If
the oil level is low, refer to heading "Engine Oil
Level" in this chapter.
WARNING
Check the engine oil level with vehicle parked
on a level surface and with the parking brake
engaged.
Power Steering Oil Tank
Check steering oil level. Refer to heading
"Power Steering Fluid Level" in this chapter.
Belts
Check for loose, worn or broken belts.
Belt Tension Adjustment
Check belt tension using a pressure gauge.
Refer to heading "Belt Tension Adjustment" in
"Other Verifications" section in this chapter.
Fire Extinguishers
Check fire extinguishers to make sure they are
ready for operation. Refer to heading "Fire
Extinguishers" in "Other Verifications" section in
this chapter.
Emergency Exits
Verify emergency exits for correct operation.
Driver's Section
Adjust driver's mirrors and seat.
WITH ENGINE RUNNING:
Leaks
Walk around vehicle and listen for air leaks.
Turbocharger
Check for leaks and listen for unusual sounds
coming from the turbocharger.
Allison Automatic Transmission
Check Allison automatic transmission oil level.
Refer to heading "Automatic Transmission Fluid
Level" in this chapter.
Gauges And Buzzers
Perform a telltale light test (see "Controls and
Instruments" chapter). Make sure gauges are in
normal operating condition. Indicator lights and
buzzers should all be OFF before driving.
Fuel Level
Make sure fuel level is sufficient.
Service Brakes
Check for correct pressure build-up. Pressure
loss should not exceed 3 psi/minute (21
kPa/minute) with engine stopped and without
brake applied. Perform a full brake application.
Air loss should not exceed 7 psi/minute (48 kPa/
minute).
Brake Test
Release parking/emergency brake. Pump
service brake until air pressure drops to 65 psi
(448 kPa). Make sure the warning buzzer
operates and that the emergency brakes apply
(the control valve knob lifts up). Allow air
pressure to reach 95 psi (655 kPa) before
releasing parking brake.
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