Changing the Jib Offset Angle

Warning

When working on a part at an elevated position, use a platform or scissors lift to prevent falling and ensure safety.

Secure the offset pin in place by using the attached cotter pin.

[NOTICE]

◆ The jib will be damaged if the jib offset angle is changed with the top jib section extended. Make sure that the jib is fully retracted whenever the jib offset angle is changed.

◆ Do not extend or lower the boom to bring the jib to a desired angle. This could damage the jib. Use the hoist operation to raise or lower the jib.

1. Select the jib set status on the load moment indicator.

[NOTICE]

◆ Take care to the rope socket position when attaching it to the bracket. (See the enlarged portion of the figure.)

If positioned inversely, the rope socket hits the jib at the lower face when the auxiliary winch is operated, and the socket will be damaged.

2. Remove the auxiliary hook block and secure the rope socket to the bracket on the jib using the fixing pin.

3. Raise the jib to a point where the offset pin can be removed by hoisting up with the auxiliary winch.

◆ The jib needs to be raised only slightly to remove the offset pin.

◆ When the jib offset angle is to be reduced, raise the jib slightly above the desired offset angle.

4. Reinsert the offset pin in the pin hole of the desired offset angle.

Changing the Jib Length

When working at an elevated position, use a platform or scissor lift to prevent falling and ensure safety.

Secure the jib lock pin in place by using the attached cotter pin.

[NOTICE]

5. Slowly lower the jib by hoisting down with the auxiliary winch until the jib is held in place by the offset pin.

◆ When increasing the offset angle, raise the boom as necessary while lowering the jib to prevent the jib head from hitting against the ground.

◆ The jib could be damaged if the boom is raised or lowered with the jib at a 5° offset angle and the auxiliary hook block in contact with the jib head. Use the hoist operation to change the jib length.

1. Select the jib set status on the load moment indicator.

2. Disconnect the anti two block device leads at the jib head.

6. Select the jib offset angle on the load moment indicator corresponding to the actual angle.

3-1.Jib offset angle at 5°

(1) To draw out the jib easily, retract the outrigger jack cylinder on the boom facing side until the jib head is approximately 3 feet (1 meter) above the ground.

(4) Extend the outrigger jack cylinder to set the crane level.

(2) Hoist down with the auxiliary winch to let out the wire rope approx. 25 feet (8 meters).

◆ To prevent the wire rope from being improperly wound, pull on the rope by hand. Wear protective gloves.

3-2.Jib offset angle at 30° [NOTICE]

◆ Take care to the rope socket position when attaching it to the bracket. (See the enlarged portion of the figure.)

If positioned inversely, the rope socket hits the jib at the lower face when the auxiliary winch is operated, and the socket will be damaged.

(1)Remove the auxiliary hook block and secure the rope socket to the bracket on the jib using the fixing pin.

The top jib section may extend suddenly. Do not stand in the path of an extending jib.

(3) Remove the jib lock pin and slide out the top jib section.

(2) Hoist up the auxiliary winch slightly and remove the jib lock pin.

(3)Slowly hoist down the auxiliary winch. The top jib section will extend under its own weight.

◆ While lowering the auxiliary winch, raise the boom as necessary to prevent the jib head from hitting against the ground.

6. Reconnect the anti two block device leads.

7. Select the status on the load moment indicator that corresponds to the actual state of the jib.

WARNING

The top jib section may extend suddenly. Do not stand in the path of an extending jib.

(4)If the top jib section does not extend all the way, draw it out by hand. Wear protective gloves.

4. After the top jib section has extended completely, insert the jib lock pin.

8. Raise the auxiliary the hook block, and make sure that the anti two block device is operating properly.

Retracting the Top Jib Section

1. Select the jib set status on the load moment indicator.

5. Remove the rope socket from the bracket on the jib and attach the rope to the auxiliary hook block.

2. To make handling the job easier, lower the boom until the jib head is approximately 3 feet (1 meter) above the ground.

[NOTICE]

◆ Take care to the rope socket position when attaching it to the bracket. (See the enlarged portion of the figure.)

If positioned inversely, the rope socket hits the jib at the lower face when the auxiliary winch is operated, and the socket will be damaged.

5. Remove the auxiliary hook block and secure the rope socket to the bracket on the jib using the fixing pin.

3. Disconnect the anti two block device leads.

4. Remove the jib lock pin.

6. Slowly hoist up using the auxiliary winch to retract the top jib section until about 3 feet (1 meter) remains extended.

7. Lower the boom until the jib head is approximately 3 feet (1 meter) above the ground. Hoist up again with the auxiliary winch until the top jib section is fully retracted.

11. Select the status on the load moment indicator that corresponds to the actual length of the jib.

8. Insert the jib lock pin. After the jib lock pin has been inserted, hoist down the auxiliary winch.

12. Raise the auxiliary hook block, and make sure that the anti two block device is operating properly.

9. Remove the rope socket from the bracket on the jib and attach the rope to the auxiliary hook block.

10. Reconnect the anti two block device leads.