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3.7.9.2 Installing the Reeling Drum Cable
1. Loosen the strain relief on the cheekplate and feed the Reeling Drum cable through the wall of
the cheekplate. Leave enough slack to work easily with the cable.
2. If not already stripped, remove 1” of the outer jacket of the cable with an X-ACTO knife.
3. Unravel the stainless steel braid and twist it into a single wire.
4. Remove 1/4” insulation from the center wire. The insulation bonded to the center wire is difficult
to remove. Remove small increments about 0.1” at a time with wire strippers.
5. Connect the Reeling Drum cable to TB2 on the arm of the slip-ring. The braided wire connects
to the black wire and the center core connects to the brown wire. Using two cable ties, tie the
cable to the arm of the slip-ring.
6. Secure the Reeling Drum cable to the arm of the slip-ring with two tie-wraps.
7. Adjust the cable to bend slightly from the strain relief to the slip-ring. Rotate the Reeling Drum.
Ensure the path of the new cable is unimpeded; then, tighten the strain relief.
8. Wind the Reeling Drum cable onto the Reeling Drum in a single layer.
9. Set pre-tension (5 turns counterclockwise). Thread the Reeling Drum cable through the cable
guides. Attach the cable to the boom tie-off-post and connect it to the Anti-Two-Block switch.
10. To set the potentiometer to zero, refer to
CHAPTER 2 - CALIBRATION
. Recalibration of the
extension span should not be necessary.
11. Fully extend and retract the boom at least twice. Ensure the reeling drum cable remains in a
single flat layer on the drum surface and the length display on the display console is accurate
with a fully extended or fully retracted boom. Any stacking of the cable on the Reeling Drum
surface will cause measurement errors. If this is the case, it may be necessary to check that the
first cable guide aligns correctly with the outside edge of the Reeling Drum surface.
12. Install the Reeling Drum cover, ensuring the “O” ring on the inside of the Reeling Drum is intact.
