TM 9-2320-361-10
2-32. OPERATION OF EARTH BORING AND POLESETTING
MAINTENANCE TRUCKS (Contd)
(12)
Check bored hole depth through sighting holes (2), (3), and (4) in derrick
tube (5).
(a)
If bar guide (1) is sighted through hole (2), bored hole is 8 feet deep.
(b)
If bar guide (1) is sighted through hole (3), bored hole is 9 feet deep.
(c)
If bar guide (1) is sighted through hole (4), bored hole is 10 feet deep.
(13)
After boring, push feed control lever (7) forward and pull drive control
lever (6) back (position 5, table 2-4) to raise auger (8) without pressing bumper
spring (9).
(14)
Pull back on control levers (6) and (7) (position 7, table 2-4) and lock in
position. Set hand throttle (11) at engine idle speed, raise outrigger legs (10) (refer
to b. of this para.) and move truck away from hole.
2-172