18
37
38
Maintenance
Section 10
39
Always wear protective gloves and eye protection
during maintenance operations. Do not carry out
maintenance when the engine is hot.
CHAIN SHARPENING
The pitch of the chain (Fig. 37) is .325”x.058” or
3/8”x.058”.
Sharpen the chain using protective gloves and a round
file of Ø 4.8 mm (3/16”) or Ø 5.5 mm (7/32”).
Do not fit the .325” chain on the 3/8” pinion or vice
versa.
Always sharpen the cutters with outward strokes only
(Fig. 37), observing the values given in Fig. 38.
After sharpening, the cutting links must all have the same
width and length.
A sharp chain produces well-defined chips. When
your chain starts to produce sawdust, it is time to
sharpen the chain.
After sharpening the cutters 3-4 times, it is important to
check the height of the depth gauges. If necessary, you
should lower them using the flat file and supplied
template, then round off the front corner (Fig. 39).
Proper adjustment of the depth gauge is as
important as proper sharpening of the chain.
