Chevrolet Light Duty Truck 1973, Service Manual

Page: 461 / 979

E N G IN E FUEL 6 M - 3 7
OIL GAGE
TUBE ASM
PS200-250
AIR CLEANER STUD
OIL GAGE TUBE
SUPPORT —
PS100-150(35)
V VIEW A
ASM
UPC 6Y
NOTE
Position red adhesive surface
down when installing gaskets.
^ FWD
/O U R CLEANER PS100-150
PS MODELS
NOTE
Stud must
be installed with
chamber end up.
EXTENSION
Fig. 7A~Air Cleaner and Heat Stove, P Series
POLYWRAP ELEMENT REPLACEMENT
(PAPER FILTER WITH POLYURETHANE
BAND)
NOTE: See below part replacement.
The replacement period for the polywrap paper element
is the same as for the above "paper element only".
However, each time the polywrap paper element is
replaced, also, the polyurethane band should be cleaned,
as outlined below, inspect and reoil or replace.
Cleaning the Polyurethane Band
1. Remove the polyurethane band from the paper
filter.
2. If not torn, wash the polyirethane band in kerosene
or mineral spirits then squeeze out excess solvent
(as dry as possible) (Fig.
8
A).
NOTE: Never use a hot degreaser or any
solvent containing acetone or similar solvent;
also, never shake, swing or wring the element
to remove excess solvent as this may tear the
polyirethane material. Instead, "squeeze" the
excess solvent from the element.
3. Inspect the polywrap band for tears and replace if
necessary.
4. Dip the band into light engine oil and squeeze out
excess oil.
5. Install the polyurethane band around the outer
surface of the paper filter (Fig. 9A).
PART REPLACEMENT
It should be noted that different type paper elements are
used; one with the polyurethane band and another type
used for paper element replacement without a polyure­
thane band.
Fig. 8A—Cleaning the Polyurethane Band
LIGHT DUTY TRUCK SERVICE MANUAL