A/C And Heating Air Filters - PREVOST Motorcoach XL Series Operator's Manual

CARE & MAINTENANCE
Belt tensioning is applied through air bellows
which are adjusted by an air pressure regulating
valve mounted in engine compartment above the
doors. For proper operation of the air bellows,
adjust the upper tensioning bracket to provide a 2
3/8" - 21/2" (60 - 64 mm) extension with the
pneumatic system under normal pressure and the
pressure regulating valve set at 50 psi (345 kPa)
for Series 60 engines and at 70 psi (482 kPa) for
Series 50 engines.
FIGURE 111
For belt replacement, air pressure must be
released from bellows by means of the belt
tensioner pressure releasing valve.
(see page 2-37 for location) mounted above the
engine doors close to the pressure regulating
valve, is manually operated. Before handling, be
sure that all engine safety precautions have been
observed.
FIGURE 112
A/C AND HEATING AIR
FILTERS
For maximum air conditioning and heating system
efficiency, air filters should be inspected and
cleaned as required in maintenance schedule to
ensure proper ventilation of the evaporator and
heating radiator cores.
Driver's system
Air filter for driver's system is located under
dashboard.
clockwise both 3/4 turn knurled fasteners of A/C
and heating unit access panel, then lift and
remove panel.
12017A
FIGURE 113
This valve
Central system
The central system uses two (2) air filters, they
are located in the A/C and heating compartment.
To gain access, open driver's side baggage
compartment, forward of A/C and heating
compartment, and open the air filter access panel
by unscrewing the three (3) retaining screws.
Slide out the upper filter first, then slide out the
other.
12110
FIGURE 114
6 - 8
To gain access, turn counter-
22011
22012C