Section 6: Maintenance
4220ST & 4420ST Light Utility Vehicles 700-504M
8/05/08
34
Table of Contents
Exhaust System
Prevent exhaust fires. Clean exhaust system daily while
cold of all dirt and trash. Check exhaust system often for
cleanliness especially while traveling over areas that
produce high amounts of airborne combustible
materials. Check spark arrester to make sure it is clean
and in good working condition.
Spark Arrester
Refer to Figure 6-11:
!
DANGER
The spark arrester does not stop all fire emitting sparks from
escaping the muffler. Use extreme caution when driving through
dry grass, brush and other fire hazard materials. Never stop or
park vehicle over combustible materials.
!
WARNING
The muffler is very hot and will burn upon contact. Allow time
to cool before servicing the spark arrester.
!
CAUTION
To maintain efficiency, the spark arrester must be serviced every
100 hours.
!
CAUTION
Be careful not to damage spark arrester screen when cleaning.
The spark arrester is mounted on the end of the muffler
tail pipe and is designed to suppress sparks from
escaping the muffler while they are still glowing.
Spark Arrester Maintenance Schedule
•
Inspect every 100 hours for carbon build-up and screen
damage.
•
Clean whenever carbon build-up is visible or whenever
lost of engine power is detected.
•
Replace when damaged.
Spark Arrester Maintenance Procedure
1.
Remove spark arrester mounting screw (#1) and
remove spark arrester (#2) from muffler exhaust pipe.
2.
Remove carbon deposits from both sides of spark
arrester screen with a wire bristle brush. Be careful
not to damage spark arrester screen.
3.
Inspect spark arrester for holes or breaks in the
screen and replace if damaged.
4.
Reattach spark arrester to muffler with mounting
screw.
Spark Arrester
Figure 6-11
24706
Spark Arrester
Screen
Muffle
