1.Clean the cover and the area around it to keep dirt from falling into the carburetor chamber when the cover is removed.
2.Loosen knob by turning counterclock-
wise. Remove air filter cover and air filter. NOTE: To avoid creating a fire hazard or producing harmful evaporative emissions, do not clean filter in gasoline or other flammable solvent.
3.Wash the filter in soap and water.
4.Allow filter to dry.
5.Replace parts.
Air Filter
Knob
Air Filter Cover
BAR MAINTENANCE
If your pruner cuts to one side, has to be forced through the cut, or been run with an im- proper amount of bar lubrication it may be necessary to service your bar. A worn bar will damage your chain and make cutting difficult. After each use, clean all sawdust from the guide bar and sprocket hole.
To maintain guide bar:
SDisconnect spark plug.
S Loosen and remove bar clamp nut and chain brake. Remove bar and chain from pruner.
S Clean the oil holes and bar groove after each 5 hours of operation.
Remove Sawdust From
Guide Bar Groove
Oil Holes
S Burring of guide bar rails is a normal process of rail wear. Remove these burrs with a flat file.
SWhen rail top is uneven, use a flat file to restore square edges and sides.
File Rail Edges 
and Sides
Square
Worn Groove | Correct Groove |
Replace guide bar when the groove is worn, the guide bar is bent or cracked, or when excess heating or burring of the rails occurs. If replacement is necessary, use only the guide bar specified for your pruner in the repair parts list.
LUBRICATION
Bar Oil
Fill Cap
SSee GUIDE BAR AND CHAIN OIL under the OPERATION section.
MUFFLER AND SPARK ARREST- ING SCREEN
WARNING: The muffler on this prod- uct contains chemicals known to the State of California to cause cancer.
As your unit is used, carbon deposits build up on the muffler and spark arresting screen. For normal homeowner use, however, the muffler and spark arresting screen will not re- quire any service. After 50 hours of use, we recommend that your muffler be serviced or replaced by your authorized service dealer.
REPLACE SPARK PLUG
Replace the spark plug each year to ensure the engine starts easier and runs better. In- spect spark plug every 25 hours of usage. Clean and/or replace as necessary. Set spark plug gap at 0.025 inch (0.6 mm). Ignition tim- ing is fixed and nonadjustable.
1.Twist, then pull off spark plug boot.
2.Remove spark plug from cylinder and discard.
3.Replace with Champion
4.Reinstall the spark plug boot.
SERVICE AND ADJUSTMENTS
WARNING: Disconnect the spark plug before performing maintenance, service, or adjustments except for carburetor adjustments.
CHAIN SHARPENING
WARNING: Improper chain sharpen- ing techniques and/or depth gauge mainte- nance will increase the chance of kickback which can result in serious injury.
WARNING: Wear protective gloves when handling chain. The chain is sharp and can cut you even when it is not moving.
Conditions which indicate the need for chain sharpening:
SReduction in size of wood chips. The size of the wood chip will decrease as the chain gets duller until it becomes more like a powder than a chip. Note that dead or rotted wood will not produce a good chip.
SSaw cuts to one side or at an angle. S Saw has to be forced through the cut.
Tools required:
S3/16 inch (4,5 mm) diameter round file and file holder
SFlat file
SDepth gauge tool
18
