Maintenance Chart; Cleaning Air Fliter Element; Oil - DeWalt DW168F Manual

MaIntenanCe
procedure Daily
(whichever
comes first)
Clean engine exterior
Clean battery pack and
charger
Check oil level X
Change oil *
Clean air filter
Clean spark plugs
Check fuel line, hose clamps
X
and fuel tank
Oil leak inspection X
Spark arrestor
Sediment cup
Clean inline fuel filter
Check for unusual
X
noise/vibration
Check and adjust valve
clearance (.15 mm intake,
.2 mm exhaust)
Prepare unit for storage if it is to remain idle for more then 30
Prepare unit for Storage
days
* The engine oil must be changed after the first 20 hours or operation. Thereafter change oil every
100 hours of operation or monthly, whichever comes first.
(1) Perform more frequently in dusty or humid conditions
spaRk pluG ConDITIon ChECk
• Remove the spark plug for inspection
• Always use recommended plug see Specifications
• Set gap to specification, see spark plug under Maintenance Standards.
1. normal plug – Slightly rounded electrodes with light coat of ashy brown deposits indi-
cate normal wear and a healthy engine.
2. oil Fouling – Wet oily film will prevent the plug from sparking. This condition signals
worn valves or piston rings. This condition can be caused by running the engine in
the choke position. Check valves and piston rings, overhaul if needed. Replace spark
plug.
3. Carbon Fouling – Black dry soot covering the electrodes indicates incomplete com-
bustion. This can be a result of weak ignition or a rich mixture.
a. Check carburetor adjustment, adjust speed if needed.
b. Check air filter, clean if needed.
4. Gap Bridging – A combustion particle lodged between the electrodes carries current
across the gap. This does not normally signal engine problems elsewhere.
5. Whitened Electrodes – This is evidence combustion is too hot and there is overheat-
ing. This can result from too lean fuel mixture.
50 hours 100 hours 150 hours
or weekly or monthly
(whichever
comes first)
X
X
X(1)
X(1)
X
X
X
a. Make sure spark plug is correct type, see spark plug under Maintenance
Standards.
500 hours
b. Ignition timing malfunction. Set ignition air coil gap, see the Flywheel Ignition
adjustment section.
6. Excessive Wear – Plug worn to the point of having encrusted deposits and thin
rounded out electrodes. Replace plug.
Cleaning Air Filter Element
waRnIng: Hot surfaces. Risk of burn. Engine and surrounding parts are very hot, do not
touch. Allow engine to cool prior to servicing.
A dirty air cleaner will restrict airflow to the carburetor. To prevent carburetor mal func tion,
service the air filter regularly. Service more frequently when operating the generator in
extremely dusty areas.
waRnIng: Using gasoline or flam mable solvent to clean the filter element can cause a
fire or explosion.
X
waRnIng: Risk of fire. Do not operate without air filter.
To ClEan ThE ElEMEnTs
(Dw168f-2E, Dw177f-E, Dw168f-2h, Dw177f-h)
1. Remove the wing nut and the air filter cover.
2. Remove the second wing nut and remove the filter.
3. Remove the foam-type pre-filter from the filter.
X
4. Inspect foam and paper elements. Replace them if damaged.
To ClEan ThE ElEMEnTs
Foam element: wash element in warm, soapy
water. Then saturate it in clean engine oil.
Squeeze the element to remove excess oil.
paper element: Clean element by tapping
gently to remove dust. Use compressed air to
blow off dust.
waRnIng: When using compressed air, user
always must wear eye protection that conforms to
ANSI Z87.1. (CAN/CSA Z94.3).
Never use oil. Always blow the element from the
inside. If using compressed air keep the air pressure less than 30 psi.
Place the foam pre-filter over the paper element and reinstall it onto the engine.
(Dw168f-2f, Dw177fD-f, Dw188f)
1. Unsnap the air filter cover clips and remove
the air cleaner cover.
2. Remove the elements from air filter.
3. wash elements in warm soapy water and
rinse thoroughly. Allow the elements to dry
thoroughly.
4. Soak the elements in clean engine oil and
squeeze out the excess oil. noTE: The engine will smoke during initial start-up if too
much oil is left in the elements.
5. Reinstall the air filter elements and snap air filter cover in place.

oil

waRnIng: Hot surfaces. Risk of burn. Engine and surrounding parts are very hot, do
not touch. Allow engine to cool prior to servicing.
To ChECk oIl
1. Place unit on a flat level surface.
14