4Removal and Installation of Arm

4 Removal and Installation of Arm

Cautions

•Park the machine on a solid and level position. •Be sure to stop the engine before beginning work. •When working cooperatively with others, take great care to follow safety procedures while giving clear signals to each other. •Wear protective devices (safety glasses, safety shoes, etc.) for when working with hammers. •Be sure to inspect the nylon slings and other lifting equipment before beginning work. •Do not stand on or pass under the suspended load (arm).

•Wrench (19 mm) •Bar hammer •Holding-up bar •Nylon sling (that meets the required lifting capacity) •Crane (that meets the required lifting capacity) •Grease •Rags •Cleaning fluid •Crossties

Items to prepare

[1] Remove and install the bucket. (For details, see "Removal and Installation of Bucket".) [2] Remove and install the bucket cylinder. (For details, see "Removal and Installation of

Bucket Cylinder".) [3] Allow the tip of arm (1) to touch the ground and fix the arm with crane and nylon sling (2).

[4] Use a 19-mm wrench to remove the lock bolt (1). 2 1

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[5] Use a bar hammer (1) and the holding-up bar (2) to push out the pin (3) and remove the arm (4). •If the pin is difficult to pull out, it is being loaded. •When pulling out a pin, take care not to damage the installed O-ring and dust seal. •When installing parts, clean the pin and pin opening of each part, and firmly rub them with grease. 1 2

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