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W450769A 01/14
3.7.9 Reeling Drum Cable
The Reeling Drum Cable carries the Anti-Two-Block signal from the switches at the main boom head,
aux head and erected jib/fly. The cable is made from stainless steel wire and a durable outer sheath.
Damage to the cable can cause intermittent Anti-Two-Block signals or bad measurement of boom
extension. If the cable has been broken or damaged in any way, it can be replaced in the field.
FIGURE 3.7.9 REELING DRUM CABLE CONNECTION ON THE REELING DRUM
3.7.9.1 Removing the Reeling Drum-Off Cable
1. Fully retract and lower the boom. Disconnect the Reeling Drum cable from the Anti-Two-Block
switch or connector.
2. Grip the cable firmly and release it from the tie-off post.
3. Continue to grip the cable firmly while allowing it to fully wind back onto the Reeling Drum.
4. Remove the Reeling Drum cover.
5. Cut the 2 tie-wraps that secure the Reeling Drum-off cable to the slip-ring support arm.
6. Unscrew the Reeling Drum cable from the terminal block on the slip-ring support arm.
7. Loosen the gray cable gland mounted on the cheekplate.
8. Pull the existing Reeling Drum cable out through the cable gland.
Cable Gland
TB2
Reeling Drum Cable
Sensor Baseplate
Assembly
