Standard Number of Parts of Line

Warning

If the wire rope is reeved in a number of parts of line greater than the standard and the boom is raised to a large angle, the extra wraps of rope that should be left on the drum will be unwound before the hook block reaches the ground, causing damage to the wire rope and its anchor at the winch drum. Even with the standard number of parts of line, this problem will arise if the load is lowered below ground level. When the number of parts of line is greater than the standard or the load is being handled on a site that has a significant elevation differences, ensure that more than three wraps of rope will remain on the winch drum while the load is lowered. When the number of parts of line is less than the standard, be sure not to exceed the allowable load for one part of line (see the "INFORMATION AND DATA" section).

The following table shows the standard number of parts of line for different boom lengths. Select the number of parts of line that ensures the most efficient operation, taking into consideration boom length, load weight, hoisting speed and other conditions such as winch drum wire rope capacity.

Reeving Procedure

1. Extend the outriggers and set the boom in the desired direction.

2. Lower the boom all the way down and set the hook block on the ground.

3. Remove the weight of the anti-twoblock device from the wire rope.

Secure the rope socket fixing pin installing bolt using a wrench.

7. After reeving the rope, install the rope socket on the boom if the number of parts of line is even, or on the hook if the number is odd.

◆ Have the rope socket facing in the direction shown when it is installed on the boom.

4. Remove the two rope guide pins from the boom head.

5. Remove the three bolts from the main hook block.

8. Install the weight for the anti-twoblock device on the rope.

◆ Where the weight should be installed depends on the number of parts of line. When the number of parts of line is even, install the weight on the last part of line. When the number is odd, install the weight on the second to last part of line.

6. Reeve the wire rope according the "Standard Number of Parts of Line" table.

◆ Pull the rope out by hand while hoisting down with the winch in order to prevent improper winding. Wear protective gloves.

9. Reinstall the two rope guide pins at the the boom head. Reinstall the three bolts on the hook block.

10. Raise the boom and hoist up with the winch to wind the rope around the drum.

◆ The rope is often wound improperly when the wire rope is reeved without suitable tension on the line. Rewind the ropes if necessary.

Single Top

Components

Single Top Lift

Warning

The rated lifting capacity for a single top lift is determined by subtracting 1,000 lbs. (450 kg) from the rated lifting capacity for a boom lift. The maximum load permitted for the single top, however, is limited to 12,300 lbs. (5,600 kg). Even if the load obtained from the above calculation is over 12,300 lbs. (5,600 kg), 12,300 lbs. (5,600 kg) must be taken as the rated lifting capacity.

The single top is mounted on the the boom head and used for lifting relatively light loads. Although the load that the single top can handle is limited in weight, the single top utilizes a single rope arrangement which significantly shortens hoisting time. Usually the single top is used to hoisting operations with the auxiliary winch, auxiliary winch wire rope and auxiliary hook block.

◆ Prior to lifting a load with the single top, select the single top lift status on the load moment indicator.

Mounting the Single Top

Warning

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

Mount the single top securely. Use the attached bolts, cotter pins and rings to ensure that the stowing pin, connecting pins, rope guide pins, and hook mounting pins do not slip out of position.

1. Fully extend the outriggers and set the crane in a level position.

2. Lower the boom all the way down.

4. Insert the connecting pin to secure the single top in position.

3. Remove the stowing pin and swing the single top forward. Replace the stowing pin in its original position.

5. Remove the anti two block device from the jib and remount it on the single top.

6. Connect the leads of the anti two block device as shown.

7. Return the stowed auxiliary winch wire rope over the upper side of the boom.

winch wire rope

Secure the rope socket fixing pin installing bolt using a wrench.

10. Install the rope socket in the auxiliary hook block.

8. Remove the lock pin to detach the auxiliary winch wire rope socket from the anchor on the jib.

11. Hoist up the hook block to remove it from its stowing position.

12. Select the single top lift status on the load moment indicator.

9. Reeve the auxiliary winch wire rope around the sheaves of the top boom section (boom head) and single top. Set the rope guide pins back in their original position.

13. Raise the auxiliary hook block and make sure that the anti two block device is operating normally.