3. BROKEN LENGTH CABLE
PROBLEM: Damaged or broken length cable.
Replace length cable using the following procedure:
Refer to: Drawing 2 - Electrical Wiring Central Unit to Console/Cable Reel
Drawing 4 - Cable Reel - Parts List
Drawing 10 - Boom Nose Junction Box w/ohmmeter on 1 & 2
Drawing 11 - Slip Ring w/ohmmeter on X2:Red & X1:Brown
Procedure 5 - Length Potentiometer and Angle Sensor Adjustment
Cut old cable at cable drum
Disconnect damaged length cable from junction box at the boom nose. Refer to
Drawing 2, 10.
Open cable reel cover and disconnect wiring from terminal block. Pull 7-conductor
cable out of strain relief.
Remove cable reel from mounting brackets.
Remove damaged length cable, which is mounted to the slip rings in the cable reel,
from slip ring terminal. Refer to Drawings 2, 4, 11.
On the back side of the cable reel, open the strain relief attached to the axle in the
center of the drum. Pull existing length cable out of the cable reel.
Pull new length cable through the hole, pipe and strain relief and push it through
the axle of the reeling drum. Tighten strain relief to ensure sealing.
Reconnect the length cable to the slip ring. Refer to Drawing 2, 4, 11.
Remount cable reel to the boom.
Turn reeling drum clockwise to spool the new cable neatly onto the drum.
Set pre-load on cable reel by turning the drum counter-clockwise 5 to 8 turns.
Wrap the new length cable around the boom tip anchor pin (8 - 10 wraps) and
secure with tie wraps. Leave enough length cable to connect into the boom tip
Connect the length cable into the boom tip junction box. Refer to Drawing 2, 10.
Reset length potentiometer in length angle transducer (screw is located in center of
white gear); with boom fully retracted, turn potentiometer carefully counter-
clockwise until it reaches a soft stop. Recheck length and angle display. Refer to