Navistar ProStar+, Operation And Maintenance Manual

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Inspection Guide
12. Doors: Ensure windows are clean and operate properly
and smoothly in both doors.
13. Windshield and Wipers: Check windshield for cracks,
dirt, illegal stickers or other obstructions to view. Ensure
wipers and windshield washer are functioning properly.
14. Lighting Indicators: Check to see that instrument panel
indicators illuminate when corresponding lights are
turned on.
15. Heater / Defroster: Check to be sure that heater /
defroster is working. Verify adequate air flow from
louvers and vents. Operate Temperature and Mode
controls to verify proper operation.
16. Air Brake Check: Check the air brakes in the following
manner:
a. Install wheel chocks if necessary. Push in parking
brake and start engine.
b. Check for air compressor or governor cut-out
pressure at 125 - 135 psi (862 - 931 kPa). Shift
into a low gear, and gently pull against service and
parking brakes separately to make sure they hold.
c. Shut off engine and TURN KEY BACK ON.
d. Without brake pedal applied, note air pressure drop
for one minute. It should be less than 2 psi (14 kPa).
e. Depress and hold brake pedal and make sure
there is no more than a 3 psi (21 kPa)-per-minute
pressure drop.
For combination vehicles, there
should be no more than 4 psi (28 kPa)-per-minute
pressure drop.
f. Step on and off brake pedal and check that warning
indicator and alarm come on at about 60 - 76 psi
(414 - 524 kPa).
g. Step on and off brake pedal and check to make sure
the parking brake knobs pop out between 20 and 45
psi (138 - 310 kPa).
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