How-To" Maintenance - Dolmar GE-4300 L Instruction Manual

7. "HOW-TO" MAINTENANCE

(See Fig. 5 5 )
CAUTION
Make sure the engine is stopped before
starting any maintenance, servicing or
repair.
NOTE
It is recommended to use ear protection
when performing operation, maintenance
and repair of the generator set.
1. ENGINE OIL CHANGE (See Fig. 5 5 -q q )
Change engine oil every 50 hours.
■ ■
(For new engine, change oil after 20 hours.)
(a) Drain oil by removing the drain plug and the oil
filler cap while the engine is warm.
q OIL DRAIN PLUG
(b) Reinstall the drain plug and fill the engine with
oil until it reaches the upper level on the oil filler
cap.
Use fresh and high quality lubricating oil to the
■ ■
specified level as directed on page 5.
If contaminated or deteriorated oil is used or the
quantity of the engine oil is not sufficient, the
engine damage will result and its life will be
greatly shortened.
2. SERVICING THE AIR CLEANER
(See Fig. 5 5 -w w )
Maintaining an air cleaner in proper condition is
very important.
Dirt induced through improperly installed,
improperly serviced or inadequate elements
damages and wears out engines. Keep the
element always clean.
(a) Unhook the cover and remove the cleaner
element.
q w ELEMENT (Urethane form)
(b) Urethane form : Wash the element with fresh
water. Squeeze out the water then dry the
element. (Do not twist.)
3. CLEANING AND ADJUSTING
SPARK PLUG (See Fig. 5 5 -e e ,r r )
(a) If the plug is contaminated with carbon, remove
it using a plug cleaner or wire brush.
(b) Adjust the electrode gap to 0.6 to 0.7 mm.
q SPARK PLUG
w PLUG WRENCH
e SPARK PLUG CAP
Spark plug :
BR-6HS (NGK) or RL86C (CHAMPION)
4. CLEANING FUEL STRAINER
(See Fig. 5 5 -t t )
Dirt and water in the fuel are removed by the fuel
strainer.
q FUEL STRAINER CUP
(a) Remove the strainer cup and throw away water
and dirt.
(b) Clean the screen and strainer cup with gasoline.
(c) Tightly fasten the cup to main body, making sure
to avoid fuel leak.
5. CHECKING CARBON BRUSH
(See Fig. 5 5 -y y )
If the brush become excessively worn, its contact
pressure with the slip ring changes and causes a
roughened surface on the slip ring, resulting in
irregular generator performance.
Check the brush every 500 hours or if generator
performance is irregular.
If the brush is 5 mm long or less, replace it with a
new one.
q BRUSH HOLDER
w BRUSH
e 5 mm
r M5 BOLT : 1 pc.
t BRUSH COVER
(a) Remove the brush cover.
(b) Disconnect the wire connector and remove the
brush.
(c) Carefully note the brush direction and relative
position with the slip ring when installing new
brush.
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