8.5 WORKING TECHNIQUES
8.5.1 Relieving cut (Fig.PP13)
To avoid tearing the bark, kickback or pinching the bar when pruning thick
branches, always start by performing a relieving cut (1) on the underside of the
branch.
To do this apply the cutting attachment and pull it across the bottom of the branch
as far as the bar nose. Perform the cross-cut (2).
8.5.2 Flush-cutting thick branches (Fig.PP14)
If branch diameter is more than 10cm (4"), first perform undercut (3) and
cross-cut at a distance (A) of about 25cm (10") from the final cut. Then carry out
the flush-cut (4), starting with a relieving cut and finishing with a cross-cut.
8.6 MAINTENANCE
8.6.1 50-HOUR MAINTENANCE
Every 50 hours of operation (more frequently in dusty or dirty conditions):
1. Remove and clean the cylinder cover and clean dirt and debris from the
cylinder cooling fins.
2. Remove the sprocket cover and inspect the sprocket for excessive dirt, debris,
or wear.Remove the guide bar and clean out the guide bar groove.
3.If the sprocket is excessively worn, replace it with a new one. (See Fig.PP15)
4.Lubricate the gear case. To perform this operation, first remove the gear case
from the upper outer tube as follows (See Fig.PP16):
