Swisher E4-U3000 Manual Del Usaurio página 13

Maintenance (continued)
50 hour maintenance
Remove and replace the fuel filter
element.
■
Use a hooked wire to extract the fuel filter
from inside the fuel tank. Inspect the fuel
filter element. If it shows signs of contami-
nation, replace with a genuine Shindaiwa
replacement fuel filter element.
CAUTION!
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.
Before reinstalling the new filter
element, inspect the condition of all the
fuel system components (fuel pick-up
line, fuel return line, tank vent line, tank
vent, fuel cap and fuel tank). If damage,
splitting or deterioration is noted, the
unit should be removed from service
until it can be inspected or repaired by a
Shindaiwa-trained service technician.
139/150-Hour Maintenance
Maintenance after first 139-hours,
then ever y 150-hours thereafter.
■
Combustion chamber should be
decarbonized, and the valve clearance
should be adjusted. It is highly recom-
mended that this is done by a Swisher-
trained service technician.
Valve adjustment
1. Remove cylinder cover, rocker arm
cover, and spark plug. Rotate the
crankshaft while observing the pis-
ton through the spark plug opening.
When the piston is at the top of the
compression stroke (TDC), the valves
can be adjusted.
CAUTION!
■
Performing a valve adjustment
incorrectly may cause hard start-
ing and/or can damage the engine.
■
If you are unfamiliar with this
engine or uncomfortable with this
procedure, consult with an autho-
rized Swisher servicing dealer.
Hooked wire
■
Replace the spark plug annually: Use
only NGK CMR5H or equivalent resis-
tor type spark plug of the correct heat
range. Set spark plug electrode gap to
0.024-0.028 inch (0.6 -0.7 mm).
2. Loosen adjuster locknut so that the 2.5
mm Allen socket head adjustment screw
can turn freely.
3. Insert 0.10 mm (0.004") feeler gauge
between valve stem tip and rocker arm.
4. Turn adjustment screw (clockwise =
tighter, counter-clockwise = looser) until
feeler gauge is almost snug. Back off just
enough to allow gauge to slip out with
limited resistance.
5. While holding the adjustment screw in
place with the Allen driver, tighten the
locknut with a wrench.
Fuel filter element
NOTE:
The NGK CMR5H also meets the
requirements for electro magnetic com-
pliance (EMC).
6. Turn engine over several times, and
return to TDC-compression. Recheck
with proper feeler gauge to make sure
clearance adjustment did not change as a
result of tightening the locknut. Readjust
as necessary.
7. Replace rocker arm cover gasket to
assure proper sealing and install cover.
IMPORTANT!
If a new gasket is not available and/or the
old gasket is not damaged, the old gasket
may be reused. Never use cracked or
damaged gaskets!
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