Parklander Pro PRO-40SUM, Original Instructions Manual

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13
MAINTENANCE
MAINTENANCE, REPLACEMENT OR REPAIR
OF THE EMISSION CONTROL DEVICES AND
SYSTEMS MAY BE PERFORMED BY ANY NON-
ROAD ENGINE REPAIR ESTABLISHMENT OR
INDIVIDUAL.
Carburetor adjustment (Fig. 26)
WARNING
The cutting attachment may be spinning during
carburetor adjustments.
Never start the engine without the complete
clutch cover and tube assembled! Otherwise
the clutch can come loose and cause personal
injuries.
○
○
In the carburetor, fuel is mixed with air. When the
engine is test run at the factory, the carburetor is
basically adjusted. A further adjustment may be
required, according to climate and altitude. The
carburetor has one adjustment possibility:
T = Idle speed adjustment screw.
Idle speed adjustment (T)
Check that the air fi lter is clean. When the idle
speed is correct, the cutting attachment will not
rotate. If adjustment is required, close (clockwise)
the T-screw, with the engine running, until the
cutting attachment starts to rotate. Open (counter-
clockwise) the screw until the cutting attachment
stops. You have reached the correct idle speed
when the engine runs smoothly in all positions
well below the rpm when the cutting attachment
starts to rotate.
If the cutting attachment still rotates after idle
speed adjustment, contact Hitachi Authorized
Service Centers.
NOTE
Standard Idle rpm is 2500–3000 min-1.
WARNING
When the engine is idling the cutting
attachment must under no circumstances
rotate.
Air fi lter (Fig. 27)
The air fi lter must be cleaned from dust and dirt
in order to avoid:
○
Carburetor malfunctions
○
Starting problems
○
Engine power reduction
○
Unnecessary wear on the engine parts
○
Abnormal fuel consumption
Clean the air filter daily or more often if working in
exceptionally dusty areas.
Cleaning the air fi lter
Remove the air filter cover and the filter (21).
Rinse it in warm soap suds. Check that the fi
lter is dry before reassembly. An air fi lter that
has been used for some time cannot be cleaned
completely. Therefore, it must regularly be
replaced with a new one. A damaged filter must
always be replaced.
Fuel filter (Fig. 28)
Drain all fuel from fuel tank and pull fuel filter
line from tank. Pull filter element out of holder
assembly and rinse element in warm water with
detergent.
Rinse thoroughly until all traces of detergent are
eliminated. Squeeze, do not wring, away excess
water and allow element to air dry.
NOTE
If element is hard due to excessive dirt
buildup, replace it.
Spark plug (Fig. 29)
The spark plug condition is influenced by:
○
An incorrect carburetor setting
○
Wrong fuel mixture (too much oil in the
gasoline)
○
A dirty air filter
○
Hard running conditions (such as cold weather)
These factors cause deposits on the spark plug
electrodes, which may result in malfunction and
starting difficulties. If the engine is low on power,
difficult to start or runs poorly at idling speed,
always check the spark plug first. If the spark plug
is dirty, clean it and check the electrode gap. Re-
adjust if necessary. The correct gap is 0.6 mm.
The spark plug should be replaced after about
100 operation hours or earlier if the electrodes
are badly eroded.
Angle transmission (Fig. 30)
Check angle transmission or angle gear for