30-20 Overview
D20x22 Series II Navigator HDD
D
RILL
T
OOL
A
SSEMBLIES
Refer to
Fundamentals of Horizontal Directional
Drilling
manual for tool selection guidelines.
Drilling Head Assembly
Step 1:
Choose a bill
(1)
to match soil
conditions, desired hole size, and
type of service.
Step 2:
Attach bill to drill head
(2)
using
mounting bolts
(3)
. Torque bolts to
35 ft-lb (47 Nm).
Step 3:
Follow instructions for transmitter
(4)
battery installation, and check function of transmitter. A variety of transmitters are available that
will fit inside drill head cavity.
Step 4:
Either install three O-rings
(5)
, or wrap electrical tape at each end and in center of transmitter to
protect it from side load shock.
Step 5:
Install transmitter in drill head cavity.
WARNING:
Eye protection must be worn when removing and installing roll pins. Serious
eye injury can occur if struck by steel chips from the hammer, punch, or roll pin.
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