Heavy Duty Power Equipment Maintenance 4550 Pro, 5650, 6500(EL), 7550 Pro
MAINTENANCE
The Importance of Maintenance
Good maintenance is essential for safe, economical, and trou-
ble-flee operation. It will also help reduce air pollution.
To help you properly care for your generator, the following
pages include a maintenance schedule, routine inspection
procedures, and simple maintenance procedures using basic
hand tools. Other service tasks that are more difficult, or re-
quire special tools, are best handled by professionals and are
normally performed by a DEK technician or other qualified
mechanic.
The maintenance schedule applies to normal operating condi-
tions. If you operate your generator under severe conditions,
such as sustained high-load or high-temperature operation, or
use it in unusually wet or dusty conditions, consult your servic-
ing dealer for recommendations applicable to your individual
needs and use.
Engine Oil Change
Drain the oil while the engine is warm to assure rapid and com-
plete draining.
1. Remove the drain plug and sealing washer, remove the oil
filler cap, and drain the oil.
2. Reinstall the drain plug and sealing washer. Tighten the
plug securely.
3. Refill with the recommended oil (SAE 10W-30 ) and check
the oil level.
Dispose of used motor oil in a manner that is compatible with
the environment. Do not throw it in the trash, pour it on the
ground, or down a drain.
Air Cleaner Service
A dirty air cleaner wilt restrict air flow to the carburetor. To pre-
vent carburetor malfunction, service the air cleaner regularly.
Service more frequently when operating the generator in ex-
tremely dusty areas.
Maintenance, replacement, or repair of the emission con-
trol devices and systems may be performed by any engine
repair establishment or individual, using parts that are
"certified" to EPA standards.
Maintenance Schedule
Item
Engine oil (Cheek)
Engine Oil (Change)
Air Cleaner (Cheek)
Air Cleaner Wash
Before 2Ohrs or 50 hrs or 100 hrs or 300 hrs
each use every 3 every 3 every 6 or every
month months months 1 year
NOTICE:
Never run the generator without the air filter. Rapid engine wear
will result.
1. Unsnap the air cleaner cover clips, remove the air
cleaner cover, and remove the element.
2. Wash the air cleaner element in a solution of household
detergent and warm water, then rinse thoroughly, or
wash in nonflammable or high flashpoint solvent. Allow
the air cleaner element to dry thoroughly.
3. Soak the air cleaner element in clean engine oil and
squeeze out the excess oil. The engine wilt smoke dur-
ing initial startup if too much oil is left in the air cleaner
element.
4. Reinstall the air cleaner element and the cover.
Fuel Filter Cleaning
Fuel filter Cup (Clean) X
Spark Plug (Clean) X
Spark Plug (Change)
Optional Spark Arrestor (Clean) X
Valve Clearance (Adjust)
Fuel Tank and Filter (Clean) X*
Fuel Tube (Check) Every 2 yrs (replace if necessary)*
Combustion Chamber (Clean) After every 250 hrs*
Should be performed by an authorized DEK dealer.
X*
The fuel filter cup / screen prevents dirt which may be in the
fuel from entering the carburetor. The fuel filter should be
inspected and cleaned on a regular basis. For best results,
clean the filter with gasoline and a toothbrush or blow the
debris out of the filter with air pressure.
Spark Plug Service
In order to service the spark plug, you wilt need a spark plug
wrench. Recommended spark plugs: BPR5ES (NGK) and
W16EPR-U (DENSO). To ensure proper engine operation,
the spark plug must be properly gapped and free of depos-
its.
Replacement Parts
The emission control systems on your DEK engine were designed,
built, and certified to conform with EPA and California emission regu-
lations. We recommend the use of genuine DEK parts whenever you
have maintenance done. These original-design replacement parts
are manufactured to the same standards as the original parts, so you
can be confident of their performance. The use of replacement parts
that are not of the original design and quality may impair the effec-
tiveness of your emission control system.
If the engine has been running, the muffler will be very
hot. Be careful not to touch the muffler,
1. Remove the spark plug cap.
2. Clean any dirt from around the spark plug base.
3. Use a spark plug wrench to remove the spark plug.
A manufacturer of an aftermarket part assumes the responsibility that
the part wilt not adversely affect emission performance. The manu-
facturer or rebuitder of the part must certify that use of the part wilt
not result in a failure of the engine to comply with emission regula-
tions.
PLUS;SAP--_--
Rev. 1/2010
DEK® is registered trademark of GXi Outdoor Power, LLC Clayton, NC 27520 USA.
No part of this publication can be printed or copied without written permission.
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