InstroTek
38
Maintenance for Exhaust Filter Replacement
Maintenance
Required
Frequency Procedure
Replace the exhaust
filter
500 hours or
annually,
whichever
comes first
(should be
done
whenever the
oil is changed)
1.
Remove the 2 screws holding the fan
cover in place.
(fig. 1, pg. 39)
2.
Remove the 4 hex head cap screws
holing the exhaust silencer in place
(fig.
2, pg. 39)
3.
Remove the polyester filter
(fig. 3, pg. 39)
4.
Remove the machine screw holding the
filter spring assembly in place
(fig. 4, pg.
39)
5.
Pull the exhaust filter out, ensure the O-
Ring is removed, and discard both.
(fig.
5, pg. 39)
6.
Slide the new exhaust filter into the oil
pump making sure that the O-ring fits
tightly in the exhaust port.
7.
Replace the filter spring assembly
making sure that the exhaust filter is snug
inside the pump.
8.
Replace the polyester filter.
9.
Put the exhaust silencer back into place
and replace the 4 hex head cap screws.
10.
Put the fan cover back into place and
replace the 2 screws.
11.
Once the oil and exhaust file are
changed, carefully push the vacuum
hose inside the chassis and close the
chassis. Replace and tighten the two
screws on the back
