OPERATION
11 11
Digging with the Trencher
The following specific guidelines should be followed when
digging with a trencher.
1 Make an initial cut with the trencher boom 1 lying flat
along the ground.
2 As the chain is rotating begin inserting the nose of the
boom into the ground as A while slowly raising the
trencher a few inches off the ground as B. Both of
these operations should be done gradually (see the
Carrier Operator Manual - Loader Controls).
3 Gradually establish the trencher boom angle. Best
results will be obtained with an angle between 45
o
and
60
o
. The skid shoe 2 should be just above ground
level. Make certain the trench cleaner 3 is operating
freely if fitted.
4 The digging chain should rotate anticlockwise as at C
when viewed from the drive chain casing 4 side.
5 Whenever possible always dig along the centre line of
the trench. This makes it easier to control the
machinery and dig a straight trench.
6 Gently creep the carrier backwards as at D. Too fast a
speed will cause the trencher to stall.
7 Control the depth by adjusting the boom controls of
the carrier (see Operator Manual - Loader Controls).
8 Do not engage the ‘float’ control of the arm and
attachment if fitted as this increases the drag on the
system.
A1461-1
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