Chain Maintenance - Spark PROFESSIONAL TV 3840 Mode D'emploi

WARNING: Always wear protective
gloves during maintenance operations. Do not
carry out maintenance when the engine is hot.
The pitch of the chain (Fig. 24) is 9.53 mm х 1.27 mm
(3/8" LoPro x .050").
Sharpen the chain using protective gloves and a
round file of Ø4.8 mm (not included in the kit).
Fig. 24
Always sharpen the cutters only with outward strokes
(Fig. 25) observing the values given in Fig. 24.
After sharpening, the cutting links must all have the
same width and length.
WARNING: A sharp chain produces
well-defined chips. When your chain starts to
produce sawdust, it is time to sharpen.
After every 3–4 times the cutters have been sharp-
ened you need to check the height of the depth gaug-
es and, if necessary, lower them using the flat file and
template (not included in the kit), then round off the
front corner (Fig. 26).
WARNING: Proper adjustment of
the depth gauge is as important as proper
sharpening of the chain.
Fig. 25
Guide bar – The bar should be reversed every 8
working hours to ensure uniform wear.
Keep the bar groove and lubrication hole clean us-
ing the bar groove cleaner (not included in the kit)
(Fig. 27).
Original instructions
Check the bar rails frequently for wear and, if neces-
sary, remove the burs and square-up the rails using
the flat file (Fig. 28).
on a worn sprocket or self-aligning ring.
bar wear – Turn guide bar frequently at regular in-
tervals (for example, after 8 hours of use), to ensure
even wear on top and bottom of bar.
oil passages – Oil passages on the bar should be
cleaned to ensure proper lubrication of the bar and
chain during operation.
NotE. The condition of the oil passages can be eas-
ily checked. If the passages are clear, the chain will
automatically give off a spray of oil within seconds of
starting the saw. Your saw is equipped with an auto-
matic oiler system.

cHAIN mAINtENANcE

chain tension:
Check the chain tension frequently and adjust as of-
ten as necessary to keep the chain snug on the bar,
but loose enough to be pulled around by hand.
breaking in a new saw chain:
A new chain and bar will need chain readjustment af-
ter as few as 5 cuts. This is normal during the break-in
period, and the interval between future adjustments
will begin to lengthen quickly.
links removed from a loop of chain. This could
cause damage to the sprocket.
chain lubrication:
Fig. 26
Always make sure the automatic oiler system is work-
ing properly. Keep the oil tank filled with SPARKY
chain, bar and sprocket oil.
Adequate lubrication of the bar and chain during cut-
ting operations is essential to minimize friction with
WARNING: Never mount a new chain
Fig. 27
WARNING: Never have more than 3
Fig. 28
15
EN