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MAINTENANCE AND INSPECTION
WARNING
Pull out battery before doing any inspection or
maintenance.
Maintenance safety
○ Maintain the unit/machine according to recommended
procedures.
○ Use only genuine HiKOKI replacement parts as
recommended by the manufacturer.
WARNING
Improper maintenance could result in serious machine
damage or in serious personal injury.
1. Checking the condition of the cutting attachment
The cutting attachment should be checked regularly. If
worn or broken cutting attachment can slip or decrease
the efficiency of the motor and burn it out.
Replace worn cutting attachment with new ones.
CAUTION
If you use a cutting attachment of which point is worn or
broken, it will be dangerous. So replace it with a new
one.
2. Inspecting the mounting screws
Regularly inspect all mounting screws and ensure that
they are properly tightened. Should any of the screws
be loose, retighten them immediately. Failure to do so
could result in serious hazard.
3. Maintenance of the motor
The motor unit winding is the very "heart" of the power
tool. Exercise due care to ensure the winding does not
become damaged and/or wet with oil or water.
4. Inspection of terminals (tool and battery)
Check to make sure that swarf and dust have not
collected on the terminals.
On occasion check prior, during and after operation.
CAUTION
Remove any swarf or dust which may have collected on
the terminals.
Failure to do so may result in malfunction.
5. Cleaning on the outside
When the power tool is stained, wipe with a soft dry
cloth or a cloth moistened with soapy water. Do not use
chloric solvents, gasoline or paint thinner, for they melt
plastics.
6. Gear case (Fig. 30)
Check gear case or angle gear for grease level about
every 50 hours of operation by removing the grease
filler plug on the side of gear case.
If no grease can be seen in the screw hole on the sides
of the gears, fill the gear case up to 3/4 full with quality
lithium based multipurpose grease (sold separately).
CAUTION
○ Make sure to remove any dirt or grit when attaching the
plug to its original position.
○ Before attempting inspection or maintenance of the
gear case, make sure the case has cooled.
7. Semi-auto nylon head
Nylon line replacement
(1) Remove the case by firmly pushing inward the locking
tabs. After removing the case, take out the reel and
discard the remaining line. (Fig. 31)
(2) Rotate the button in the direction of the button arrow
mark, and align the nylon line guide and the reel groove
in a straight line. (Fig. 32)
(3) Starting from the nylon line guide, insert the nylon line in
the direction of the reel arrow mark and pass it through
the reel groove, then pull it out to the nylon line guide on
the opposite side.
Make the nylon line the same length on both ends.
(Fig. 33)
(4) Rotate the button in the direction of the button arrow
mark, and wind the nylon line onto the reel.
The initial cutting line length should be approx. 110–
140 mm and should be equal on both sides. (Fig. 34)
(5) Place the cover over the case so that the locking tabs
on the cover meet the locking holes of the case. Then
push the case securely until it clicks into place.
CAUTION
Ensure that the hooks are securely hooked onto the
latch in 2 places.
If the area around the latch becomes clogged with dirt,
etc., it may not be able to lock securely, so clean it
periodically to remove dirt.
8. Blade (Fig. 35)
WARNING
Wear protective gloves when handling or performing
maintenance on the blade.
○ Use a sharp blade. A dull blade is more likely to snag
and thrust. Replace the fastening nut if it is damaged
and hard to tighten.
○ When replacing blade, purchase one recommended by
HiKOKI, with a 25.4 mm (one inch) fitting hole.
○ In the case of a 3 tooth blade, it can be used on either
side.
○ Use the correct blade for the type of work.
○ When replacing blades, use appropriate tools.
○ When cutting edges become dull, re-sharpen or file as
shown in the illustration. Incorrect sharpening may
cause excessive vibration.
○ Discard blades that are bent, warped, cracked, broken
or damaged in any way.
NOTE
When sharpening blade it is important to maintain an
original shape of radius at the base of the tooth to avoid
cracking.
9. Storage
Store the power tool and battery in a place in which the
temperature is less than 40°C and out of reach of
children.
NOTE
Storing lithium-ion batteries.
Make sure the lithium-ion batteries have been fully
charged before storing them.
Prolonged storage (3 months or more) of batteries with
a low charge may result in performance deterioration,
significantly reducing battery usage time or rendering
the batteries incapable of holding a charge.
However, significantly reduced battery usage time may
be recovered by repeatedly charging and using the
batteries two to five times.
If the battery usage time is extremely short despite
repeated charging and use, consider the batteries dead
and purchase new batteries.
CAUTION
In the operation and maintenance of power tools, the
safety regulations and standards prescribed in each
country must be observed.
Important notice on the batteries for the HiKOKI
cordless power tools
Please always use one of our designated genuine
batteries. We cannot guarantee the safety and
performance of our cordless power tool when used with
batteries other than these designated by us, or when the
battery is disassembled and modified (such as
disassembly and replacement of cells or other internal
parts).
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