STEP 2: Lay housing on its side
in horizontal position. Slide the transmitter into the sonde housing [Fig. 1]. DO NOT DROP
transmitter into housing from vertical position.
STEP 3: Using a large screwdriver, rotate the transmitter until the forward slot on the
transmitter engages the index pin on the front retainer [Fig. 2]. NOTE: The transmitter
should move forward about 1/8 when properly engaged.
STEP 4: With the screwdriver, rotate or index the transmitter until the 12 oclock
position corresponds with 12 oclock position of the boring head. NOTE: The boring
head steering flat should be down in the 6 oclock position.
STEP 5: Push down on the transmitter with the screwdriver to check that the spring loaded
forward retainer allows the transmitter to travel forward about 1/2. NOTE: You may
have to wiggle the screwdriver back and forth slightly to enable the transmitter to travel
with the spring loaded forward retainer.
STEP 6: Verify 12 oclock position with the signal receiver.
STEP 7: Lubricate the rear retainer o-rings with oil or a light grease [Fig 3.].
STEP 8: Install the rear retainer [Fig. 3]. Rotate the rear retainer while pushing it with
light pressure towards the transmitter. You must push the retainer and transmitter forward
about .25" in order to engage the threads. This is necessary to compress the spring
loaded indexing mechanism. NOTE: You may have to wiggle the rear retainer back and forth
slightly to enable the transmitter to travel with the spring loaded forward retainer.
STEP 9: Recheck the 12 oclock position.
STEP 10: Torque the sonde housing onto the drill pipe using the appropriate torque for the
connection being used. To minimize connection failure always make-up the connection to the
appropriate torque values.
INSPECTION REQUIREMENT TO ENSURE PROPER TRANSMITTER CLEARANCE: If the transmitter becomes
difficult to remove or it appears that the slot epoxy is protruding into the transmitter
chamber, use an emery cloth flap grinder to remove any protruding epoxy and clean the bore
to ensure that the transmitter easily slides in and out [Fig. 4]. Use compressed air to
blow out the epoxy dust and residue after cleaning.
Fig. 2 - Screwdriver/Transmitter
Fig. 3 - Retainer
Fig. 4 - Flap grinder/Drill motor
NOTE: If no flap grinder is available, please call Geological Boring at 253-863-5746 to
order the flap grinder. The unit comes with an extension mandrel and can easily be used
with a hand drill.
That is all...