1Removal and Installation of Swing Motor Assembly

1 Removal and Installation of Swing Motor Assembly

Warning •Be sure to release the hydraulic pressure before beginning work.

Caution

•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 (swing motor assembly).

•Wrench (14 mm, 19 mm, 22 mm, 27 mm, 36 mm, 40 mm) •Box wrench (30 mm) •Pliers •Hammer •Grease •Wire rope (with the required breaking load) •Crane (that meets the lifting capacity) •Marking pen •Caps •Plugs •Rags •Cleaning fluid •Crossties

Items to prepare

[1] Use a 19-mm wrench to remove the 6 installation bolts (1), and then remove the center cover (2).

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[2] Use a wrench [40 mm (1), 36 mm (2), 27 mm (3), 22 mm (4)] to remove the hoses from the swing motor. •Mark the swing motor and hoses so that they can be connected correctly at the time of assembly. •Attach caps and plugs to the swing motor and hoses to prevent any entry of water, dust, or dirt. •Clean the swing motor and hoses by spraying with a parts cleaner to prevent scratches and prevent dirt from accumulating on the connectors.

[3] Use a 19-mm wrench to remove the grease hose (1) that feeds grease to the swing motor reduction gear bearing.

[4] Use a 19-mm wrench to remove the 3 installation bolts (1), and then remove the under cover (2). 4 3 1

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[5] Use a 14-mm wrench to remove the installation bolt (1), and then remove the gear oil hose (2) of the swing reduction gear.

[6] After removing all the hoses, use pliers to cut the tie wrap (1) that binds the hoses.

[7] Use a 30-mm box wrench to remove the 11 installation bolts (1) on the swing motor. 2

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[8] Wrap the wire rope around the swing motor and lift it with a crane. •A knock pin (2) is driven into the installed part of the swing motor. Apply lubricating oil to the knock pin and pull it out together with the main unit of the swing motor while hitting with a hammer.

[9] Thoroughly check that the location is safe before lowering the swing motor on a pair of crossties. •Thoroughly secure the swing motor so that it does not fall down.