MAGNATRAC RT1150 Operator / Technical Manual page 75

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To obtain a cleaner trench and avoid the buildup of
material directly in front of the backhoe, crowd out and
completely curl the bucket while starting to lift it from the
excavation. In this way, excess material will fall back into
the excavation.
MOVING THE TRACTOR TO THE SIDE
Lift stabilizers clear of the ground, curl the bucket ap-
proximately halfway and crowd in so the dipstick is nearly
vertical.
NOTE: The dipstick pivot, bucket pivot, and the point
where the bucket contacts the ground should be aligned
to reduce stress on the bucket and crowd cylinders.
(Bucket forward of the boom-to-dipstick pivot).
Apply sufficient down pressure with the boom to raise
the rear of the tracks off the ground. Slowly actuate the
swing control lever to move to the right or left as required.
Reset stabilizers and continue digging.
DUMPING THE BUCKET
To dump the bucket at the end of the digging cycle, lift
the bucket clear of the trench while crowding it out and
swinging it to the spoil pile.
As the pile is approached, dump the bucket. When
the bucket is empty, the dipstick and bucket are in position
to resume digging upon return to the trench.
IMPORTANT: Avoid constant jarring or hammering
type contact between the spoil pile and the loaded
bucket as this may cause premature wear to the back-
hoe pins and bushings.
TRENCHING
Trenching is the most basic backhoe digging opera-
tion. Other digging operations are merely variations of
this basic function (i.e. filling the bucket, dumping the
bucket, and moving the unit forward).
While trenching, it is generally important to maintain a
level trench bottom. This is accomplished by setting the
bucket at the proper angle of approach. As the bucket is
crowding in, continuously push on the bucket lever to
maintain the correct cutting angle. At the same time, pull
on the lift lever to relieve down pressure and keep the
bucket in the same plane.
TRENCHING BETWEEN A BUILDING AND OPEN EX-
CAVATIONS.
Start the trench at the building. Trench out halfway to
the excavation. Then, start trenching from excavation to
the first trench. Dig toward the first trench until there is
just enough room to move the unit out from between the
two trenches.
Position the unit so the backhoe swing post is over the
centerline of the trench connection. Dig with the backhoe
at extreme swing position, and in close to the stabilizers
75

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