PREVOST X3-45 VIP 2015, Owner'S Manual

Page: 146 / 190

Care and Maintenance 8-12
CABIN HVAC UNIT ACCESS DOOR & AIR FILTERS
REMOVAL
22353
HOSE INSPECTION
Inspect hoses regularly to ensure efficient,
economical and safe operation of the engine and
related equipment.
Inspect hoses for leaks. Carefully inspect all
fittings, clamps and ties. To prevent chafing,
make sure hoses are not touching shafts,
couplings, heated surfaces, sharp edges or other
parts. Since hose clamps and ties can vibrate
loose or fail over time, inspect frequently and
tighten or replace as necessary.
Correct leaking hoses immediately. Failure to
correct leaks can cause severe damage to the
equipment, as well as increase operating costs
due to lost fluids. Treat fuel and oil leaks as an
immediate fire hazard.
WARNING
Fire hazard - personal injury and property
damage may result from fire caused by
leaking flammable fluids.
Hose Service Life
Hoses have a limited service life. Thoroughly
inspect hoses annually. Look for surface
damage or indications of twisted, worn, crimped,
cracked or leaking lines. Replace damaged
hoses immediately.
Hoses should be replaced during major overhaul
or after a maximum of five years service. Make
sure replacement hoses match the original
equipment manufacturer's specifications.
LUBRICATION
Grease all lubrication points during scheduled
maintenance. For heavy loads or extended use,
lubricate more often. Refer to the end of this
chapter or to Maintenance Manual, section 24
for information on lubrication.
WHEELS AND TIRES
Check for loose wheel nuts. Both aluminum
alloy and steel wheel nuts should be tightened to
450 to 500 foot-pounds (610 to 680 Nm.) torque.
Keep the tires inflated to the recommended
inflation pressure to prolong tire life and for
safety.
NOTE
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
beside the driver’s seat.
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.
WHEEL BEARINGS
Check wheel bearing cover for overheating
(especially after brake work) during fuel stops by
touching the wheel bearing cover.
SERVICE BRAKE TEST
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).
PARKING / EMERGENCY BRAKE TEST
Release parking/emergency brakes. 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