freightliner Cargo Manual page 93

Pretrip Inspection and Daily Maintenance
27.5 Check the web retractor for function and
damage.
27.6 Check the mounting bolts for tightness and
tighten any that are loose.
28. Check the cab interior for loose items and secure
or remove them.
29. Start the engine and make sure the oil-pressure
and air-pressure warning systems are working.
When the engine is started, oil-pressure and air-
pressure warnings will come on until the oil pres-
sure rises above a preset minimum and the air
pressure in both the primary and secondary air res-
ervoir systems goes above 64 to 76 psi (441 to 524
kPa). If the air pressure in both systems is above
64 to 76 psi (441 to 524 kPa) when the engine is
started, test the low pressure warning system by
lowering the pressure to below this range or until
the warning system comes on.
If the warning systems do not come on when the
ignition is turned on, repair the systems.
WARNING
Failure to repair the engine shutdown/warning sys-
tem could result in the engine shutting down sud-
denly, without warning, during vehicle operation.
9.15
This could cause an accident leading to property
damage, serious personal injury, or death.
30. Make sure that both the electric horn and the air
horn work. Then check the wiper and washer con-
trol. During cold weather, check the operation of the
heater and defroster controls.
These devices must be in good working order for
safe vehicle operation. If they are not working, re-
pair them before trip departure.
31. Check the operation of the backup alarm if so
equipped.
32. Check the operation of all gauge lights and interior
lights.
Turn on the headlights, dash lights, and four-way
flashers and leave them on. Check the operation of
the dome light.
If any of the gauge bulbs, the switch panel label
bulb, the dome light bulb, or the right- and left-turn
indicator bulbs are not working, replace them.
33. Make sure all of the lights are working.
Be sure the brake lights, taillights, side marker
lights, headlights, signal lights, and clearance and
identification lights are working and are clean. Test
the high and low beams of the headlights.