Removal and Installation of Arm Cylinder

Caution ・ Stop the machine on a level location with good footing. ・ Be sure to stop the engine before beginning work. ・ When working together with others, always be sure to exchange signals and pay adequate attention to safety. ・ Always wear protective devices (protective eyewear and safety shoes, etc.) when working with a hammer. ・ Be sure to inspect the nylon sling and other lifting equipment before beginning work. ・ Do not stand or pass under the suspended load.

Items to prepare •Wrenches (19 mm, 36 mm, 41 mm) •Nylon sling (with the required lifting capacity) •Crane (with the required lifting capacity) •Caps •Plugs •Hammer •Striking rod •Grease •Rag •Cleaning fluid •Crossties •Wire 1.Removal of Arm Cylinder [1] Use a crane and nylon sling (1) to secure the arm cylinder (2).

1 Nylon sling 2 Arm cylinder

[2] Use a wrench (19 mm) to remove the bolt (3) and washer (4).

[3] Use a hammer (5) and striking rod (6) to remove the pin (7). Be careful. The arm and arm cylinder rod may come out of place.

[4] Start the engine, move the arm out at idle, and retract the arm cylinder (2) rod.

2 Arm cylinder 3 Bolt 4 Washer 5 Hammer 6 Striking rod 7 Pin

[5] Tie the cylinder rod with wire (8) so that it cannot come out.

[6] Switch the key switch (9) OFF to stop the engine. Switch the key switch ON again, and then turn the control lever (10) about 10 times to bleed off any pressure.

Do not operate the arm at this time.

[7] Move the travel lever (11) back and forth about 5 times to bleed out the pressure.

[8] Switch the key switch OFF.

8 Wire 9 Key switch 10 Control lever 11 Travel lever

[9] Press the air breather button (12) on top of the hydraulic oil tank to release the pressure inside the tank.

[10]Use a wrench (41 mm) to remove the hose (13) and use a wrench (36 mm) to remove the hose (14). •Use caps and plugs to cover the hoses and lines to prevent any entry of water, dust or dirt. •Clean the hoses and lines by spraying them with a parts cleaner to prevent scratches and prevent dirt from accumulating on the connectors.

[11]Use a wrench (19 mm) to remove the grease hose (15). •Use caps and plugs to prevent any entry of water, dust or dirt.

12 Air breather button 13 Hose 14 Hose 15 Grease hose

[12]Use a wrench (19 mm) to remove the bolt (16) and washer (17).

[13]Use a hammer (18) and striking rod (19) to push the pin (20) out. •If a pin is hard to remove, there is a load on the pin. •When removing the pins, be careful not to damage the O-rings or dust seals.

[14]Lift the arm cylinder (2).

[15]Place the arm cylinder (2) on crossties.

2.Installation of Arm Cylinder

To install, perform the reverse of the removal procedure. •Clean each pin and pin hole. •When insetting pins, be careful not to damage the O-rings or dust seals. •As the final step, always grease up.

2 Arm cylinder 16 Bolt 17 Washer 18 Hammer 19 Striking rod 20 Pin