Operation
Safety, Operation and Maintenance Manual - Sep 2012
4-46
SY115C9/135C/155H Crawler Hydraulic Excavator
4.12.2 Trench work
You can dig a trench efficiently by installing
a bucket suitable for this job and adjust your
tracks to parallel the to-be-dug trench line.
When digging a wider trench, excavate first
both sides of the trench and then remove the
middle part.
CZ335-1103199
Parallel
Fig. 4-84
4.12.3 Loading operation
In a place where the swinging angle is small,
working ef
fi
ciency can be improved by parking
the dump truck at where the operator could
see easily.
It is more convenient to load more material if
the truck is loaded from rear rather than from
its sides.
CZ335-1103200
Fig. 4-85
The digging range of arm is from 30 to 45°, as
relative to the machine.
The angle may vary according to digging
depth, but it is better to keep it within the
above range if possible. Never operate the hy-
draulic cylinders to their full stokes.
45°
30°
CZ335-1103198
Fig. 4-83
