Feider Machines FBT420 Original Instructions Manual page 11

,Maintenance of air filter
1.2
Timely cleaning and maintenance of air filter can effectively prolong the service
life of gasoline engines. Please replace the damaged air filters in time.
Remove the air filter cover, take out the filter element, wash the filter element
in soapy water, and rinse it clean. After drying, add two drops of oil to increase
the air filtration effect,and install it back in proper order.
Warning: Prohibit starting a gasoline engine without air filter!
1.3, Inspection of ignition system
Check the spark plug regularly.
Spark plug's contact spacing is 0.6mm-0.7mm,
clean up the carbon deposition between contacts
In time.
1.4, Cleaning of cylinder cooling sink
The cylinder cooling sink is the
main way of cooling down the gasoline engine
in operation. Timely cleaning can effectively
prevent the cylinder from being damaged
due to overheating.
2, Belt maintenance
Please check the tightness of the belt
regularly and adjust the tightness of the
belt in time. (see the right picture)
--Loosen the fixed bolts(1)
--Loosen the nut, turn the screw stem (2),
adjust the tension by turning left and right.
--Ditto, release the tension pulley
and you can easily change the belt.
Remind, please tighten the belt properly, if the belt is too tight,it will shorten
the usage life.
Tips: Belt tightness can be measured on the double fingers press inward in a
range of 2cm or so.
2, Other maintenance
Before storing the machine for a long time, please lubricate the bearing and
clean the rotor and knife box, then make the anti-rust protection for the rotor
and knives.
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