Reaming The Hole - Toro 22420 Operator's Manual

5. With the person guiding the boring bit positioned to
the right of the trench
move the pump selector valve to slow (turtle) (200 and
300 series traction units only), position the throttle
to within the middle of the rpm range, and pull the
auxiliary hydraulics lever rearward to start the forward
rotation of the boring bit.
6. Slowly move the traction unit forward, while the person
with the rod-guide tool guides the boring bit into the
soil (Figure 5).
7. Once the entire drill bit is in the soil, push the auxiliary
hydraulics lever into neutral.
8. Stop the engine and wait for all moving parts to stop.
9. If the rod is not within the grade tolerances for the job
being performed, start the engine and drive backward
to pull the boring bit out of the soil, then repeat steps 5
through 9, making adjustments to correct the grade.
10. Remove the rod-guide tool.
11. Start the engine and pull the auxiliary hydraulics lever
rearward to start the boring bit.
12. Slowly move the traction unit forward as the boring
bit digs into the soil.
Important: Do not drive too fast, forcing the bit
into the soil. Allow the bit to progress at its own
rate. Never push or pull the bit through the soil
when the drive head is not turning.
13. When about 15 cm (6 inches) of rod are left showing in
the entrance trench or when the boring bit completely
enters and bores into the far side of the exit trench,
stop the traction unit, push the auxiliary hydraulics
lever into neutral, and stop the engine.
14. If the boring bit has not yet entered the exit trench,
complete the following:
A. Detach the rod from the drive head.
B. Start the engine and back up to the end of the
entrance trench.
C. Stop engine and wait for all moving parts to stop.
D. Connect another rod and repeat steps 11 through
14.

Reaming the Hole

1. With a shovel, carefully dig around the boring bit,
clearing it of soil until it can be removed
(Figure 5), start the engine,
(Figure
1. Sidewalk or driveway
2. Exit trench
3. Shovel dug-out area
around bit
2. Remove the boring bit and attach the reamer
3. Attach the cable or piping being installed to the swivel
on the end of the reamer
4. Start the engine and pull the auxiliary hydraulics lever
rearward to start the reamer.
5. Slowly move the traction unit rearward as the reamer
digs into the soil.
Important: Do not drive too fast, forcing the
reamer into the soil. Allow the reamer to progress
at its own rate. Never push or pull the reamer
through the soil when the drive head is not turning.
6. When a rod coupling is about 15 cm (6 inches) into
the entrance trench or when the reamer completely
enters the trench with about 15 cm (6 inches) of the
cable or piping, stop the traction unit, pull the auxiliary
hydraulics lever into neutral, and stop engine.
7. If the reamer has not yet entered the exit trench,
complete the following:
A. Detach the rod from the drive head and rod still
in the soil.
B. Start the engine and move to the front of the
entrance trench.
C. Stop the engine and wait for all moving parts to
stop.
6).
D. Connect the drive head to the rod shaft in the soil.
E. Repeat steps 4 through 7.
8. With the reamer and cable/piping in the entrance
trench, remove the cable or piping from the reamer.
7
Figure 6
4. Reamer
5. Swivel
(Figure 6).
g008478
(Figure 6).