Pre-Cleaner Servicing; Air Cleaner Servicing; Checking Restriction Indicator; Replacing The Filter - PREVOST H3-41 Maintenance Manual

7.1 PRE-CLEANER SERVICING

MAINTENANCE
The pre-cleaner
self-cleaning; however, it should be inspected
and any accumulated foreign material removed
during the periodic
impregnated paper filter element.

7.2 AIR CLEANER SERVICING

Replacing the air filter cartridge is important to
preserve a good air quality at a sufficient level.
Neglecting this servicing could lead to an
efficiency loss and eventual engine problems.
Follow these steps to replace the filter cartridge:
7.2.1

Checking restriction indicator

Locate the restriction gage in the engine
compartment, at the back of the vehicle.
Consisting of a black tube, it is fixed on the main
intake hose.
R
ESTRICTION INDICATOR
FIGURE 15 RESTRICTION INDICATOR LOCATION
Indication of a need to replace the filter will be
apparent once its line turns red. Proper
operation will be indicated by a green line.
Consult the servicing schedule for time intervals
between each regular filter change.
7.2.2

Replacing the Filter


Remove the four filter cover plastic bolts. The
filter itself can be removed by pulling it with
gentle movements from left to right and
up/down. A residual suction may occur,
creating additional resistance.
is designed to be
replacement of the
PA1621 Maintenance Manual All Series | Section Revised September 2017
SECTION 03 : FUEL SYSTEM

Empty the drain rubber valve located under
the filter housing; if damaged this part can be
ordered and changed.
FIGURE 16

Using a clean damp cloth, wipe the sealing
flange and the inside of the outlet tube.
C
LEAN BOTH SIDES OF THE FLANGE
FIGURE 17

Look for traces of dirt and particles on the
outer surface of the old filter, indicating
possible leakage. If so, the leakage cause
should be investigated and solved.

Unbox the new filter, inspect the inner sealing
surface for potential non-conformities; Do not
wipe the surface as it is factory sprayed with
a dry lubricant for an easier mounting.
Insert new filter by gently pushing it inside the
filter housing.
CAUTION
Avoid pushing it by its center; use both hands
and push on its outer rim until it is well seated.
(It should be exceeding the housing by around
2-1/2 inches as shown)
R
UBBER DRAIN VALVE
15