Changing the Jib Offset Angle

WARNING

Never let anyone stand under the jib. When working at an elevated position, use a platform or scissor lift to prevent falling and ensure safety.

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

[NOTICE]

◆ Select the jib set status on the load moment indicator before operating the jib; otherwise the jib lock pin switch nor jib mounting/stowing switch will not work.

◆ Before operating the winch, make sure that the wire rope is not wound disorderly on the winch drum.

Increasing the Jib Offset Angle (from 3.5° to 25° or 45°)

1. Retract the boom fully and set it to the horizontal.

Base jib with top jib mounted

[NOTICE]

◆ Take care of the rope socket orientation when attaching it to the bracket. (See the figure below.) If positioned inversely, the rope socket hits the jib at the lower face when the winch is operated, and the socket will be damaged.

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

Base jibBase jib with top jib mounted

Fixing pin

Fixing pin

WARNING

T23383E

Do not lower the boom while the wire rope is tense; otherwise the jib or the wire rope will be damaged, creating a hazard of serious accidents.

4. Hoist up the winch to a point where the offset pins can be removed.

◆ Hoist up the winchuntil the stopper touches the boss.

Base jib

◆ This method for the base jib section with the top jib section mounted is same.

Offset pin

T24482E

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

T23300

Hoist up the winch.

T30436E

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

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

6. Slowly lower the jib by hoisting down the winch until the jib is held in place by the offset pins.

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

Offsett pin

To make offset angle to 45゜

To make offset angle to 25゜

Increasing the Jib Offset Angle from 25° to 45°

Do not lower the boom while the wire rope is tense; otherwise the jib or the wire rope will be damaged, creating a hazard of serious accidents.

Hoist down the winch.

7. Hoist down the winch until the wire rope becomes slightly slack. Then remove the rope socket from the jib bracket.

8. Pass the rope socket through the weight of the antitwoblock device and mount it on the auxiliary hook block.

Take the same procedure as described in the "Increasing the Jib Offset Angle" section. However, substitute the following operation for the steps 4. and 5.

(1)Hoist up the winch to the point where the jib offset pins can be removed.

(2)Reinsert the offset pin in the pin hole of the 45°-angle.

Reducing the Jib Offset Angle (from 25° or 45° to 3.5°)

1. After retracting the boom fully, lower the boom until the jib head is close to the ground.

◆ The method for the base jib section with the top jib section mounted is same.

When the offset angle is 45゜

When the offset angle is 25゜

2.

Do not let the stoppers hit the bosses while lowering the boom; otherwise the jib or the wire rope will be damaged, creating a hazard of serious accidents.

5. While lowering the boom, slowly hoist up the winch until the stopper touches the boss.

7. Slowly lower the jib by hoisting down the winch until the jib is held in place by the offset pins.

8. Hoist down the winch until the wire rope becomes slightly slack. Then remove the rope socket from the jib bracket.

9. Pass the rope socket through the weight of the antitwoblock device and mount it on the auxiliary hook block.

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

Stowing the Base Jib

[NOTICE]

◆ Strictly follow the warnings and notices in the "Mounting the Base Jib" section.

◆ If the jib offset angle is other than 3.5°, change its offset to 3.5° beforehand, referring to the "Changing the Jib Offset Angle" section.

1. Retract the boom fully and set it to horizontal. Free the set pin (E) so that it can fix the jib when the jib is stowed.

Reducing the Jib Offset Angle from 45° to 25°

Take the same procedure as described in the "Reducing the Jib Offset Angle" section. However, substitute the following operation for the steps 5. and 6.

(1)Hoist up the winch to the point where the jib offset angle is 25° or less (where the offset pins can be inserted).

(2)Reinsert the offset pin in the pin hole of the 25°-angle.

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

3. Connect the wiring for the anti-twoblock device as shown in the figure below.

5. Remove the rope socket from the auxiliary hook block and attach it to the bracket on the head of the base jib section.

Twoblocking detector switch

T24488E

If you fail to remove the pin inserted in the rod of the twoblocking detector switch, the antitwoblock device for the boom will not work and consequently the boom can be damaged. Before performing boom lift, make sure that the anti-twoblock device works.

4. If the boom lift is to be performed after this procedure, put the anti-twoblock device for the boom in operation.

To put the device in operation, remove the weight from the support on the boom head and remove the pin from the rod of the twoblocking detector switch. Stow the pin into the support.

6. Hoist up the winch until the wire rope becomes tense and then hoist up the winch slowly to the point where the connecting pin (H) can be pulled out.

Fixing pin T24471E

7. Remove the connecting pin (H) using the jib handle.

Connecting pin (H)

Hoist up the winch. Align the pin with the pin hole. T23403E

8. Hoist down the winch until the wire rope becomes slightly slack. Then remove the rope socket from the jib bracket.

9. Remove the wire rope from the sheaves and guides on the head of the boom and jib.

◆ Set the guides and the rope guide pins back in their original position.

◆ Stow the mast sheave in the jib.

12. Free the set pin on the stowage support.

◆ If the stowage support is not swung out, draw it out using the jib mounting/stowing switch before the operation.

10. Attach the guide rope to the jib head.

To prevent accidents, never let anyone stand in the path of nor under the jib.

[NOTICE]

◆ Make sure that the boom is fully retracted before swinging the jib. The boom can be damaged if it is extended.

13. Fold the jib in toward the boom by pulling the guide rope. The set pin for the stowage support will be engaged to connect the base jib section.

11. Pull the set pin down using the jib handle. Lock the set pin (F) in place by turning it clockwise.

14. Stow the stowage support using the jib mounting /stowing switch. The base jib section will move toward the boom.

◆ Make sure that the jib mounting/stowing operationality indicator lamp is lit. While it is unlit, the jib mounting /stowing cylinder does not move. The lamp does not light up if the jib lock pin cylinder is not retracted fully.

◆ After the jib lock pin at the center support is extended, marks on the both sides of the cylinder (red) and the jib (blue) at the center support will be aligned.

Mark on the cylinder (Red)

◆ Make sure that the jib is connected with the jib lock pin at the center support.

Make sure that the boom angle is horizontal or over before removing the pivot pin (G). If the pin is removed while the boom is lowered below horizontal, the jib can fall.

15. Flip the jib lock pin switch upward to connect the jib lock pin at the center support on the boom with the jib.

To prevent the jib from falling off, secure the jib by inserting the set pin immediately after removing the pivot pin (G).

16. Remove the pivot pin (G) using the jib handle.

17. Remove the set pin on the stowage support and move the base jib section toward the boom until the set pin (E) connects the base jib section with the top jib section.

(3) Stow the anti-twoblock device onto the head of the base jib section.

18. Insert the stowing pin (A) for the base jib section. Insert the connecting pin (I) to connect the base jib section with the top jib section.

19-2. If the auxiliary winch has been employed for jib lift, follow the steps below.

(1) Remove the wire rope confining the jib opening angle from the head of the base jib section and stow it into the bottom of the jib stowage support.

(2) Hook the auxiliary wire rope on the rope arrester.

19-1. If the main wire rope has been employed for jib lift, follow the steps below.

(1) Reeve the wire rope around the sheave on the top face of the boom and set the rope guide pin.

(2) Reeve the wire rope around the main hook block. For reeving pattern, see the “Reeving Procedure” section.

(3) Pass the auxiliary wire rope as shown below.

(4) Attach the rope socket onto the support on the jib. Stow the anti-twoblock device onto the head of the base jib section.

Stowing the Base Jib and the Top Jib

[NOTICE]

◆ Strictly follow the warnings and notices in the "Mounting the Base Jib" section.

◆ If the jib offset angle is other than 3.5°, change its offset to 3.5° beforehand, referring to the "Changing the Jib Offset Angle" section.

1. Retract the boom fully and set it to horizontal. Free the set pin (E) so that it can fix the top jib section to the base jib section when the top jib section is stowed. Also, free the set pin (C) so that it can fix the jib ass'y to the boom when the jib ass'y is stowed.

[NOTICE]

◆ Operate the auxiliary winch carefully. If the wire rope is wound too far, the support on the jib will be broken.

◆ Stow the auxiliary wire rope letting it slack. If it is tense, the wire rope stowage support can be damaged due to tension when the boom is raised. (5) Take in the auxiliary wire rope, leaving it slightly slack.

20. Select the boom lift on the load moment indicator.

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

21. Overhoist the main hook block and make sure that the anti-twoblock device is operating properly.

3. Connect the wiring for the anti-twoblock device as shown in the figure below. Remove the anti-twoblock device from the jib head.

If you fail to remove the pin inserted in the rod of the twoblocking detector switch, the antitwoblock device for the boom will not work and consequently the boom can be damaged.

Before performing boom lift, make sure that the anti-twoblock device works.

4. If the boom lift is to be performed after this procedure, put the anti-twoblock device for the boom in operation.

To put the device in operation, remove the weight from the support on the boom head and remove the pin from the rod of the twoblocking detector switch. Stow the pin into the support.

5. Remove the rope socket from the auxiliary hook block and remove the wire rope from the sheave on the head of the top jib section. Replace the rope guide pins back in their original position.

6. Remove the connecting pin (I) on the left that connects the base jib section with the top jib section and stow it onto the stowage support.

◆ To remove the connecting pin (I), hit it by a plastic hammer.

Leave the pin on the right inserted.

7. Attach the guide rope to the head of the top jib section. Then raise the boom to the 3.5° boom angle to make the jib horizontal.

Set the jib horizontal. Guide rope

11. Perform the steps of 5.–16. in the "Stowing the Base Jib" section.

12. Remove the set pin on the stowage support, and swing the jib toward the boom until the set pin (C) connects the jib with the boom.

To prevent accidents, never let anyone stand in the path of nor under the jib.

8. Pull the guide rope to stow the top jib section onto the base jib section. Then make sure that the set pin (E) connects the top jib section with the base jib section.

13. Insert the stowing pins (A), (B) and (D) for the jib.

Lower the

14. Stow the wire rope by performing the steps 19. and onward in the "Stowing the Base Jib" section and select the boom lift status on the load moment indicator.