5-10Upper: Counterweight 1Removal and Installation of Counterweight

1 Removal and Installation of Counterweight

Cautions

•Be sure to stop the engine before beginning work. •Be sure to inspect the wire rope and other suspended items before beginning work. •Do not stand or pass under the suspended load (counterweight). •Thoroughly secure the removed counterweight with the wire ropes and crane so that it does not fall down.

•Box wrench (50 mm) •Eyebolts (36 mm × 2) •Shackles (with the required lifting capacity × 2) •Wire rope (with the required breaking load) •Crane (that meets the lifting capacity) •Crossties •Rags •Cleaning fluid

Items to prepare

[1] Remove the 2 caps (2) from the top of the counterweight (1).

[2] Install 2 36-mm eyebolts (1) in place of the removed caps. •Spray lubricating oil on the eyebolts. •Fully tighten the eyebolts, and then loosen them by a half turn. 2

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[3] Connect the shackle (1) to the eyebolts, and then use the wire ropes and crane to secure the counterweight so that it does not fall during removal and installation operations.

[4] Use a 50-mm box wrench to remove the 4 installation bolts (1) from the counterweight.

[5] Use the wire ropes and crane to lift and remove the counterweight. •Move the counterweight about 50 cm to the rear while lifting it so that it does not interfere with the pipes. 1

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[6] Thoroughly check that the location is safe before lowering the counterweight on a crosstie. •Thoroughly secure the counterweight with the wire ropes and crane so that it does not fall down.