Lubrication; Wheels And Tires Verifications; Wheel Bearings; Service Brake Test - PREVOST H3-45 2023 Operator's Manual

8-16 Care and Maintenance

LUBRICATION

Grease all lubrication points during scheduled
maintenance. For heavy loads or extended use,
lubricate more often. Refer to the Maintenance
Manual, section 24 for information on lubrication.

WHEELS AND TIRES VERIFICATIONS

Check for loose wheel nuts. Inspect all types of
rims for cracks. Cracks can appear in many
places but typically radiate out from where a load
is applied. Both aluminum alloy and steel wheel
nuts should be tightened to 450 to 500 foot-
pounds (610 to 680 N.m.) torque.
Keep the tires inflated to the recommended
inflation pressure to prolong tire life and for
safety.
NOTE
For coaches, recommended tire inflation
pressures are given in the "Coach Final
Record", placed in the technical publications
package supplied with the vehicle. The cold
tire inflation pressures are on the Department
of Transport certification plate located on the
L.H. console besides the driver's seat. When
special tires are installed by Prevost on a new
vehicle, a special tire inflation chart is added
next to the certification plate.
WARNING
Do not exceed maximum inflation pressure.
Incorrect tire pressure increases tire wear and
could lead to loss of driving control because of
reduced road handling. Check tire pressure
regularly.
WARNING
If replacement tires are different from those
specified on the certification plate, pressure must
be adjusted following
recommendations.

WHEEL BEARINGS

Check wheel bearing cover for overheating
(especially after using the service brakes) during
fuel stops by touching the wheel bearing cover.

SERVICE BRAKE TEST

Check for correct pressure build-up. Stop engine
and check pressure gauge. Pressure loss should
not exceed 3 psi/min (21 kPa/min) with engine
stopped and without brake pedal applied. Air loss
should not exceed 7 psi/min (48 kPa/min) with
engine stopped and brake pedal fully applied.
A convenient way to proceed to the service brake
test is with the use of the DID menu "Air Brake
Leak-Down Test". For more information, refer to
"Driver Information Display (DID) Menus " on
page 36

PARKING BRAKE TEST

Release parking/emergency brake. Pump service
brake pedal 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.
Driving the vehicle while the parking brake is
applied should not be possible.
manufacturer
PA-1652 Operator's Manual H3-45 Coach
in Section 4 Controls & Instruments.