Removal and Installation of Swing Unit

Warning ・ Be sure to release hydraulic pressure before beginning work.

Caution ・ Be sure to stop the engine before beginning work. ・ Be sure to inspect the wire rope and other lifting equipment before beginning work. ・ Do not stand or pass under the suspended load. ・ When removing this product from the equipment it is mounted on, stop that equipment system and wait for the surface temperature of this product to fall to about 40 ℃ or below before removing it. Working on this product while it is still hot can cause burns. Additionally, always bleed out the pressure before removing any line from this product. Removing a pressurized line can result in oil spraying out and causing injury or oil leak.

Items to prepare •Wrenches (13 mm, 19 mm, 36 mm) •Hexagon wrenches (5 mm, 8 mm) •Box wrench (36 mm) •Pliers •Hammer •Grease •Specialty adapter for vacuum pump connection •Vacuum pump (vacuum pump power supply) •Extension cable •Wire rope (with the required breaking load) •Marking pen •Cap •Plug •Liftcrane (with the required lifting capacity) •Rag •Cleaning fluid •Wood planks, etc. 1.Removal of swing unit [1] Use a hexagon wrench (5 mm) to remove the 4 bolts (1), and then remove the air breather (2) on the hydraulic oil tank.

[2] Attach the specialty adapter (3) to the area where the air breather was removed, and set the vacuum pump.

Create negative pressure in the hydraulic oil tank using the vacuum pump (4).

[3] Use a wrench (19 mm) to remove the 6 bolts (5), and then remove the center cover (6).

[4] Use a wrench (19 mm) to remove the 6 bolts (7), and then remove the center cover (8).

[5] Remove the hoses (9), (10), (11), (12) and (13) from the swing motor.

Wrench (41 mm): make-up hose (10)

Wrench (36 mm): pilot hose (9)

Wrench (19 mm): drain hose (13)

Hexagon wrench (8 mm): main hoses (11) and (12) •Mark the swing motor and hoses so that the connectors can be matched during assembly. •Attach caps or plugs to the swing motor and hoses to prevent any entry of water, dust or dirt. •Clean the swing motor and hoses by spraying them with a parts cleaner to prevent scratching and prevent dirt from accumulating on the connectors.

[6] Use a wrench (19 mm) to remove the 4 bolts (14), and then remove the under cover (15).

[7] Use a wrench (13 mm) to remove the 4 bolts (17) on the 4 clamps (16) for the hose.

[8] Use a box wrench (36 mm) to remove the 12 bolts (18) from the swing unit.

[9] Wrap the wire rope (20) around the swing motor and lift it with a liftcrane. •A knock pin (19) is driven into the installation section of the swing unit. 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.

[10]Thoroughly check that the location is safe before lowering the swing unit on wood planks (21). •Thoroughly secure the swing unit so that it does not fall over.

2.Installation of swing unit [1] Perform the reverse of the removal procedure. When installing the swing unit, be careful with the position of the knock pin. The tightening torque for the bolts for installing the swing unit on the swing frame is 900 - 1050 N•m. [2] Before driving, be sure to fill the inside of the motor casing with hydraulic oil from the feed port (1). Use the level gauge (2) to check that gear oil for the reduction gear is filled to the stipulated volume.