CARE AND MAINTENANCE
6 - 5
Air Tanks
Your vehicle is equipped with four (4) air tanks;
the accessory tank and wet tank must be purged
before every trip or once a month, while the pri-
mary and secondary air tanks must be purged
each time the oil and filters are changed (maxi-
mum 12,500 miles (20 000 km)).
The accessory air tank is located in reclining
bumper compartment and is provided with a
drain valve in front service compartment.
FRONT SERVICE COMPARTMENT
The wet (main) tank is located over the drive
axle in rear wheelhousing, and is provided with
remote drain valve located in engine R.H. com-
partment.
ENGINE R.H. COMPARTMENT
12033M
All four (4) tanks are supplied with a drain valve
underneath the tank. For locations, refer to figure
in
"Lubrication and Servicing Schedule"
later in
this section.
Water Separator
(optional)
A fuel filter/water separator may be installed in
place of primary fuel filter, to prevent water infil-
tration in engine fuel system. It should be
drained periodically, or when the water separator
indicator lamp lights in dashboard. To drain,
loosen self venting drain below separator, and
tighten after water has been flushed out.
Belt Tensioners
Air-operated Type
Belt tensioning is applied through air bellows
which are adjusted by an air pressure regulating
valve mounted in engine compartment, on the
structure post, at left of A/C compressor. For
proper operation of the air bellows, adjust the
upper tensioning bracket to provide a 2 3/8" -
2 1/2" (60 - 64 mm) extension with the pneu-
matic system under normal pressure and the
pressure regulating valve set at 50 psi (345 kPa).
