Trenching - Case 570T Operator's Manual

Trenching

Trenching is the basic backhoe excavating operation.
Other digging operations are merely variations of this
basic function (filling the bucket, dumping the bucket
and moving the machine forward). While trenching, it
is generally important to maintain a level trench bottom.
This is accomplished by setting the bucket at the correct
angle of approach.
Pull on the dipper lever (1) to maintain the correct cutting
angle as the bucket is crowding in applying light pressure
to the right.
At the same time, pull on the lift lever (2) to relieve down
pressure and keep the bucket in the same plane.
Continue the trench by moving forward. Moving too far will
require excessive down pressure for digging, plus hand
clean-up of the trench bottom. It is better to move a lesser
amount than to move too far.
However, if this is not practicable, use the loader or back-
hoe attachment to cut a level surface into the slope for
the uphill wheel and stabilizer, and deposit the spoil from
the slot onto the downhill side for the opposite wheel and
stabilizer. When digging always deposit the spoil from the
trench on the uphill side.
NOTICE: When excavating across a slope it is not possi-
ble to make use of the loader bucket for added stability.
Do not overload the bucket and avoid swinging a loaded
bucket to the downhill side of the slope.
To finish the far wall on a straight-walled excavation crowd
out the bucket while forcing the bucket down the excava-
tion from the boom.
6 - WORKING OPERATIONS
6-19
1
PTIL14TLB0035AB
2
PTIL12TLB0159AB
3
PTIL14TLB0036AB