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Operation 15
MAN0306 (Rev. 5/23/2008)
Figure 5. Trenching
SIDE SLOPE TRENCHING OR
EXCAVATING
Be careful when swinging loaded bucket on hill-
side. Always dump spoil on uphill side of backhoe
to minimize rollover possibility.
When operating on a side slope, the backhoe must be
positioned using one of these two methods as shown in
Figure 6 or Figure 7.
When operating on a side slope, always place the
trench spoil on the uphill side.
Figure 6. Level with Stabilizers
Cut a level pad for the uphill side of the machine and
place spoil on the downhill side as shown in Figure 7.
Figure 7. Level with Cut Out
THUMB OPERATION
The mechanical thumb is used for grabbing objects
and securing them between the thumb and the bucket.
Become familiar with the geometry and extra weight
the thumb adds to the backhoe before operating. Large
heavy objects such as rocks and logs can increase
momentum when pivoting backhoe to the side. DO
NOT make sudden stops and starts. Be extremely
careful lifting and moving long items such as poles or
tree limbs which may extend beyond the normal back-
hoe operating area.
Improper usage can also damage the thumb or back-
hoe.
● Do not use the thumb to rake material.
● Do not use the thumb to push or pull material.
● Do not use the side of the thumb to move material.
● Do not use as a lifting device with chain or rope.
● Do not use as a pry bar to dislodge objects.
The thumb has six operating positions. Place lower
channel in the hole furthest from the dipper pivot pin
and secure with clevis pin (9). Select one of the six
operating positions and secure with hitch pin (7).
Rotate the bucket to hold material against the thumb.
When normal backhoe operation is required, place
thumb in storage position. Remove pin clevis pin (9)
from end of thumb, place lower channel in hole closest
to the dipper pivot pin and secure with clevis pin.
Rotate thumb up against dipper, and insert hitch pin to
lock thumb into storage position. See . Thumb in Stor-
age Position, page 16.
Figure 8. Thumb in Operating Position
7. Hitch pin, 3/4 x 4
9. Clevis pin, 1.0 x 8.0