CARE AND MAINTENANCE
6 - 6
AIR BELLOW
12017
For belt replacement, air pressure must be re-
leased from bellows by means of the belt ten-
sioning pressure control valve. This valve
mounted close to the pressure regulating valve,
is manually operated. Before handling, be sure
that all engine stopping safety precautions have
been observed.
PRESSURE REGULATING VALVE
120018
Manually Adjustable Type
There are two different types of manually adjust-
able belt tensioning systems. Tension belts ac-
cording to the instructions in
"Maintenance Man-
ual"
.
Filter Restriction
Indicator
A filter restriction indicator is used to monitor the
vacuum level between the air filter and engine. A
red flag is displayed when the air filter is clogged.
The filter restriction indicator is located on the
engine air intake near the turbocharger. When
the red flag is displayed, the air filter must be re-
placed. Press down on indicator to reset flag.
RESTRICTION INDICATOR
04002
A/C and Heating Air
Filters
For maximum air conditioning and heating sys-
tem efficiency, air filters should be inspected and
cleaned as required in maintenance schedule to
ensure proper ventilation of the evaporator and
heating radiator cores. To clean filters, back
flush with water, then dry with air.
Caution:
Do not use high pressure water jet to
avoid damaging filter.
Caution:
Be sure not to reverse filter upon in-
stallation.
Driver System
The driver system's air filter is located under the
dashboard. To gain access, unscrew both fas-
teners of A/C and heating unit access panel lo-
cated over entrance door steps. Remove panel
and filter.
