Reeving Wire Rope

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 mass, hoisting speed and other conditions such as winch drum wire rope capacity.

Telescoping Mode I (2nd boom section extends first.)

Telescoping Mode II (3rd through top boom sections extend first.)

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 for the anti-twoblock device from the wire rope.

◆ Mount the single top when making the 16 parts of line using the 80-short-ton hook block. In this case, attach the rope guide pin to the single top after reeving the wire rope on the sheave of the single top.

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

5. Remove the rope guide from the hook block.

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.

Secure the rope socket fixing pin installing bolt using a wrench. Do not fail to insert a cotter pin to prevent the bolt from dropping off.

7. After reeving the wire rope, install the rope socket. When the number of parts of line is even, install the rope socket on the boom. When the number of parts of line is odd, install it on the hook block. Also attach the weight for the anti-twoblock device.

◆ 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 of parts of line is odd, install the weight on the second to last part of line.

◆ Install the rope socket in the orientation as shown below.

◆ If the rope socket is to be attached to the left bracket on the boom, the position of the twoblocking detector switch and the connector (a) should be as shown in the figure.

Bolt

Cotter pin

Rope socket

Top boom section

Cotter pin Bolt

Connector (a)

Rope guide pin

Twoblocking detector switch

Weight

T30434E

8. Reinstall the two rope guide pins at the the boom head.

9. 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.

Rope socket Top boom section Rope guide pin

Twoblocking detector switch

Weight

Connector (a)

Single Top (Option)

Components

Single Top Lift

Warning

The rated lifting capacity for a single top lift is determined by subtracting the mass of auxiliary lifting equipment suspended from the boom head from the rated lifting capacity for a boom lift. The maximum load permitted for the single top, however, is limited to 11,000 lbs (5,000 kg). If the load obtained from the above calculation is over 11,000 lbs (5,000 kg), 11,000 lbs (5,000 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.

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

◆ Select the winch to be used for single top lift on the load moment indicator using the winch selector switch. When the winch selection indicator lamp is lit, the auxiliary winch is selected; when the lamp is not lit, the main winch is selected.

Mounting the Single Top

Warning

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

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

2. Lower the boom all the way down.

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

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. T23282E

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

5.

◆ If the main winch is to be employed for single top lift, the anti-twoblock device for the boom must be deactivated. To deactivate the device, stow the weight onto the support on the boom head and then insert the pin into the rod of the twoblocking detector switch.

7-1. When the main winch is to be employed, follow the steps below.

(1) Remove the main wire rope from the main hook block. (See the “Reeving Procedure” section.)

(2) Reeve the main wire rope around the sheave of the single top and set the rope guide pin in the original position.

7-2. When the auxiliary winch is to be employed, follow the steps below.

(1) Return the stowed auxiliary wire rope over the upper side of the boom.

(2) Remove the fixing pin to detach the auxiliary wire rope socket from the anchor on the jib.

(3) Reeve the auxiliary 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.

11. Select the winch to be used for single top lift on the load moment indicator using the winch selector switch. When the winch selection indicator lamp is lit, the auxiliary winch is selected; when the lamp is not lit, the main winch is selected.

Winch selector switch

: Main winch employed

: Auxiliary winch employed

Caution

Secure

12. Overhoist the auxiliary hook block and make sure that the anti-twoblock device is operating normally.