SNOWJOE SUNJOE GTS4002C Operator's Manual page 17

Maintenance + Care
m
WARNING!
Always remove the battery before performing
any adjustments, maintenance, or repairs to your cordless pole
chain saw.
• Use protective gloves when handling the bar and chain.
• Keep the bar encased in its sheath, except when working
directly on the bar or the chain.
• Never dispose of oils or other polluting materials in
unauthorized places.
Chain Tension
Check the chain tension before using the saw when the chain
is cold. The correct tension of a cold chain is when there is no
slack on the underside of the guide bar; the chain is snug, but
you can rotate it by hand without binding.
During normal saw operation, the temperature of the chain will
increase. The drive links of a correctly tensioned warm chain will
hang approximately 0.050 in. (1.25 mm) out of the bar groove
(Fig. 28). Be aware that a chain tensioned while warm, may be
too tight upon cooling. Check the "cold tension" before next use.
The chain must be re-tensioned whenever the flats on the drive
links hang out of the bar groove (Fig. 28).
Fig. 28
Properly Adjusted Warm Chain
Flats are not
visible here
Approximately 0.050 in. (1.25 mm)
Chain Needs Tensioning
Flats are
visible here
NOTE: A new chain tends to stretch. Check the chain tension
frequently and re-tension as needed.
Nuts and Screws
Periodically check that all the nuts and screws are tightened
securely. Check that the telescoping lock and assembly lock are
intact and in proper working order.
Chain Sharpening
To maintain optimal blade sharpness and peak performance,
Sun Joe recommends model 24V-CSSHRP-LTE Cordless
Chain Saw Sharpener, available on sunjoe.com, by phone at
1-866-SNOWJOE (1-866-766-9563) (Fig. 29).
Fig. 29
m
WARNING!
To ensure that the saw works safely and
efficiently, it is essential that the cutting components are well-
sharpened. It is highly recommended to replace the chain
once it loses its ability to cut cleanly and safely. It is possible,
however, to sharpen the existing chain if the sharpening is
carefully performed. Any work on the chain and bar requires
specific experience and special tools. For safety purposes, we
recommend you contact an authorized Snow Joe
dealer or call the Snow Joe
center at 1-866-SNOWJOE (1-866-766-9563).
Sharpening is necessary when:
• The sawdust looks like dust;
• Cutting becomes more difficult;
• The cut is not straight;
• Vibrations increase.
An authorized service center will sharpen the chain using the
right tools to ensure minimum removal of material and even
sharpness on all the cutting edges.
If you sharpen the chain yourself, use special round-section
files with the right diameter depending on the type of chain
(see "Chain Maintenance Table" on pg. 19). You need a certain
amount of skill and experience to avoid damaging the cutting
edges.
Sharpen the chain as follows (Fig. 30):
• Secure the bar firmly, with the chain mounted,
in a suitable vise.
• Tighten the chain if it is loose.
• Mount the file in the guide and then insert it in the tooth
at a constant angle from the cutting edge.
• Sharpen in a forward motion a few times and repeat this on
all the cutting edges facing the same way (right or left).
• To move the chain forward, use a screwdriver.
17
Cordless Chain
Saw Sharpener
24V-CSSHRP-LTE
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