Troubleshooting
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qSCALE i2 Cranes (Tool Version 3.0.34) Service Manual / Issue B / 11-2017 / ac.
3.2.6.4 Cable Reel Length Cable Replacement Procedure
Replace the length cable using the following procedure:
1. Cut old cable at cable drum.
2. Disconnect damaged length cable from junction box at the boom nose.
3. Remove cable reel from mounting brackets.
4. Remove damaged length cable, which is connected to the slip rings in the cable reel, from slip
ring terminal.
5. On the backside 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.
6. Pull new length cable through the strain relief and push it through the axle of the reeling drum.
Tighten new strain relief to ensure sealing.
7. Reconnect the length cable to the slip ring.
8. Loosely spool cable onto reel prior to mounting by reeling drum counter-clockwise.
9. Remount cable reel to the boom.
10. Unwind cable and re-spool neatly using cable reel spring tension to keep the cable taught.
NOTE: A well-wrapped first layer aids in cable spooling during operation!
11. Set pre-load on cable reel by turning the drum in the direction of spring tension
a. 154 Reel: 3 to 5 turns
b. 509 Reel: 3 to 5 turns
c. 521 Reel: 5 to 8 turns
12. Run the new length cable through the cable guides and wrap the length cable around the
boom tip anchoring and secure. If applicable, leave enough length cable to connect into the
boom tip junction box.
13. If the system has a rotary encoder, skip to Step 15.
14. Reset the length potentiometer. The screw is located in center of white gear. With the boom
fully retracted, turn the potentiometer counterclockwise carefully until it stops. Finally turn the
potentiometer clockwise ¼ turn. Recheck the length display.
15. Follow the recalibrate length sensor.
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