HENX H36LJ16 Mode D'emploi page 35

File holders have markings for the
sharpening angle.
Using light but firm pressure, stroke
f.
towards the front corner of the tooth.
Lift the file away from the steel on each
return stroke.
g. Make a few firm strokes on every tooth.
File all left hand cutters in one direction.
Then move to the other side and file
the right hand cutters in the opposite
direction. Occasionally remove filings
from the file with a wire brush (See Fig.
AH).
WARNING: A dull or improperly sharpened
chain can cause excessive motor speed
during cutting, which may result in severe
motor damage.
WARNING: Improper chain sharpening
increases the potential of kickback.
WARNING: Failure to replace or repair a
damaged chain can cause serious injury.
Top Plate Sharpening Angles (See
18.8
Fig. AI)
CORRECT 30°- This optimal angle can be
obtained only when the specified files and
proper setting are used. File holders are
marked with guide marks to align the file
properly to produce the correct top plate
angle.
LESS THAN 30°- The tooth is too dull for
cutting.
MORE THAN 30°- The edge of the cutting
tooth is feathered and dulls quickly.
Side Plate Angle (See Fig. AJ)
18.9
CORRECT 55°- The optimal angle can
be produced automatically if the correct
diameter file is used in the file holder.
HOOK- "Grabs" and dulls quickly. Increases
potential of KICKBACK. Results from using
a file with a diameter that is too small, or a
file held too low.
BACKWARD SLOPE - Needs too much feed
pressure, causes excessive wear to bar
and chain. Results from using a file with a
diameter too large, or a file held too high.
Depth Gauge Clearance
18.10
• The depth gauge should be maintained
at a clearance of 0.025in.(0.6 mm),as
shown in Fig. AK. Use a depth gauge tool
(available separately) to check the depth
gauge clearances.
• Check the depth gauge clearance every
time the chain is filed.
Use a flat file and a depth-gauge jointer (both
available separately) to lower all gauges
uniformly (See Fig. AL). Depth-gauge
jointers are available in 0.020 in. to 0.035 in.
(0.5 mm to 0.9 mm). Use a 0.25 in.(0.6 mm)
depth-gauge jointer.
Depth-gauges must be adjusted with the
flat file in the same direction the adjoining
cutter was filed with the round file. Use care
not to contact the cutter face with the flat
file when adjusting depth-gauges.
Guide bar maintenance
18.11
When the guide bar shows signs of wear,
reverse it on the saw to distribute the wear
for maximum bar life. The bar should be
cleaned every day of use and checked for
wear and damage. Feathering or burring of
the bar rails is a normal process of bar wear.
Such faults should be smoothed with a file
as soon as they occur. A bar with any of the
following faults should be replaced.
• Wear inside the bar rails which permits
the chain to lay over sideways.
• Bent guide bar.
• Cracked or broken rails.
• Spread rails.
In addition, the guide bar has a sprocket
at its tip. The sprocket must be lubricated
weekly with a grease syringe to extend
the guide bar life. Use a grease syringe to
lubricate weekly with chain oil by means
of the lubricating hole (See Fig. AM). Turn
the guide bar and check that the lubrication
holes and chain groove are free from
impurities.
Reversing The Guide Bar
18.12
a. Remove the guide bar and chain from
the chain saw, following the section:
"Replacing the bar and chain".
b. Remove the chain from the guide
bar and turn the guide bar over (See
Fig. AO). The bottom of the bar will be
on the top.
Replace the chain on the bar.
c.
English
35