50-hour Maintenance
Every 50 hours of operation
(more frequently in dusty or dirty
conditions):
Remove and clean the cylinder cover
and clean dirt and debris from the
cylinder cooling fins.
Remove the sprocket cover and
inspect the sprocket for excessive
dirt,debris,or wear, Remove the
guide bar and clean out the guide bar
groove.If the sprocket is excessively
worn, replace it with a new one.See
Figure 36.
Figure 36
Lubricate the gearcase. To perform
this operation,first remove the
gearcase from the upper outer tube
as follows(Figure 37):
1.Follow
“
Disassembling the pole
sections
”
section to remove the upper
tube from the gearcase.
2.Using a lever-type grease gun,pump
lithium-base grease(about 10 grams)
into the grease fitting until you see old
grease being purged from the gearcase,
which can be seen in the outer tube
cavity. Clean up excess grease, then
reassemble the gearcase onto the outer
tube.
Old grease being purged from the
gearcase, which can be seen in the
outer tube cavity. Clean up excess
grease, then reassemble the
gearcase onto the outer tube.
CAUTION!
Use a wire hook to extract the fuel
filter from inside the fuel tank(Figure
38).Inspect the fuel filter element for
signs of contamination. Replace it
with a new one of required.Before
reinstalling the filter, inspect the fuel
line.If you find damage or
deterioration,remove the unit from
service until it can be inspected by a
trained service technician.
Make sure you do not pierce the fuel
line with the end of the hooked wire.
The line is delicate and can be
damaged easily.
37
Summary of Contents for MT250C
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