Black Max BM5020 Manual Del Operador página 22

OPERATION
LOG SUPPORTED AT ONE END
WEDGE
LOAD
FINISHING CUT
1ST CUT 1/3 DIA
Fig. 25
LOG SUPPORTED AT BOTH ENDS
BUCKING WITH A WEDGE
See Figure 25.
1ST CUT 1/3 DIA
If the wood diameter is large enough for you to
LOAD
insert a soft bucking wedge without touching the
chain, you should use the wedge to hold the cut
open to prevent pinching.
NOTE: When bucking or felling with a wedge, you
may need to remove the safety tip anti-kickback
device to allow the bar to be drawn through the
FINISHING CUT
Fig. 26
cut. After you complete the cut, reinstall the tip.
BUCKING LOGS UNDER STRESS
See Figure 26.
Make the first bucking cut 1/3 of the way through
the log and finish with a 2/3 cut on the opposite
side. As you cut the log, it will tend to bend. The
saw can become pinched or hung in the log if you
make the first cut deeper than 1/3 of the diameter
of the log.
Give special attention to logs under stress to pre-
vent the bar and chain from pinching.
OVERBUCKING
OVERBUCKING
Fig. 27
See Figure 27.
Begin on the top side of the log with the bottom
of the saw against the log; exert light pressure
downward. Note that the saw will tend to pull
away from you.
UNDERBUCKING
See Figure 28.
Begin on the under side of the log with the top
of the saw against the log; exert light pressure
upward. During underbucking, the saw will tend
to push back at you. Be prepared for this reaction
UNDERBUCKING
and hold the saw firmly to maintain control.
Fig. 28
Page 22 — English