Homelite HCS3335A User Manual page 46

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instructions that follow, have the saw chain sharpened
by an authorised service centre or replace with a
recommended low-kickback chain.
SHARPENING THE CUTTERS
See Figures 48 - 51.
Be careful to file all cutters to the specified angles and
to the same length, as fast cutting can only be obtained
when all cutters are uniform.
WARNING:
The saw chain is very sharp. Always wear
protective gloves when performing maintenance
to the chain to prevent serious personal injury.
Tension the chain prior to sharpening. Refer to
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Adjusting The Chain Tension.
Use a 5/32 in. (4 mm) diameter round file and holder.
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Do all of your filing at the midpoint of the bar.
Keep the file level with the top plate of the tooth. Do
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not let the file dip or rock.
Using light but firm pressure. Stroke towards the front
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corner of the tooth.
Lift the file away from the chain tooth on each return
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stroke.
Put a few firm strokes on every tooth. File all left
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hand cutters in one direction. Then move to the other
side and file the right hand cutters in the opposite
direction.
Remove filings from the file with a wire brush.
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CAUTION:
A dull or improperly sharpened chain can cause
excessive engine speed during cutting, which
may result in severe engine 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 FILING ANGLE
See Figure 52.
CORRECT 30° – file holders are marked with guide
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marks to align file properly to produce correct top
plate angle.
LESS THAN 30° – for cross cutting.
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MORE THAN 30° – feathered edge dulls quickly.
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SIDE PLATE ANGLE
See Figure 53.
CORRECT 80° – Produced automatically if you use
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the correct diameter file in the file holder.
HOOK – "Grabs" and dulls quickly; increases the
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English(original instructions)
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MAINTAINING DEPTH GAUGE
CLEARANCE
See Figure 54 - 56.
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MAINTAINING THE GUIDE BAR
See Figure 57.
Every week of use, turn over the guide bar 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:
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Lubricate guide bar sprockets weekly. Using a grease
syringe, lubricate weekly in the lubricating hole. Turn the
guide bar and check that the lubrication holes and chain
groove are free from impurities.
CLEANING THE AIR FILTER
See Figures 58 - 59.
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Q
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potential of KICKBACK. Results from using a file with
a diameter too small or a file held too low.
BACKWARD SLOPE – Needs too much feed
pressure; causes excessive wear to the bar and
chain. Results from using a file with a diameter too
large or file held too high.
Maintain the depth gauge at a clearance of .025 in.
Use a depth gauge tool for checking the depth gauge
clearances.
Every time the chain is filed, check the depth gauge
clearance.
Use a flat file and a depth gauge jointer to lower
all gauges uniformly. Use a .025 in. depth gauge
jointer. After lowering each depth gauge, restore
original shape by rounding the front. Be careful not to
damage adjoining drive links with the edge of the file.
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 cutter face with flat
file when adjusting depth gauges.
CAUTION:
Make sure the chain has stopped before you do
any work on the saw.
Wear inside the bar rails that permits the chain to lay
over sideways
Bent guide bar
Cracked or broken rails
Spread rails
Activate the chain brake.
Remove the two screws holding the cylinder cover.
Lift the front of the cylinder cover past chain brake
lever.
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