Removal and Installation of Bucket 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) •Hammer •Striking rod •Crane (with the required lifting capacity) •Nylon sling (with the required lifting capacity) •Grease •Rag •Cleaning fluid •Crossties •Wire 1.Removal of Bucket Cylinder [1] Remove the bucket. (For details, see "Removal and Installation of Bucket".) [2] Remove the bucket link. (For details, see "Removal and Installation of Bucket".) [3] Bring the arm top in contact with the ground. Retract the bucket cylinder rod.

[4] Tie the cylinder rod with wire (2) so that it cannot come out.

1 Arm 2 Wire

[5] Switch the key switch (3) OFF to stop the engine. Switch the key switch ON again, and then turn the control lever (4) about 10 times to bleed off any pressure.

Note: Do not operate the bucket at this time.

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

[7] Return the key switch to OFF.

3 Key switch 4 Control lever 5 Travel lever

[8] Press the air breather button (6) on top of the hydraulic oil tank to release the pressure inside the tank.

[9] Use 2 wrenches (36 mm) to remove the hoses (7) and (8). •Use caps and plugs to cover the hoses and line 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.

[10]Use a crane and nylon sling (9) to secure the bucket cylinder (10). •Wrap the nylon sling to the inside of the line so that it is not crushed.

6 Air breather button 7 Hose 8 Hose 9 Nylon sling 10 Bucket cylinder

[11]Use a wrench (19 mm) to remove the bolt (11) and washer (12).

[12]Use a hammer (13) and striking rod (14) to push the pin (15) 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.

[13]Lift the bucket cylinder (10) and remove it. [14]Place the bucket cylinder on crossties.

2.Installation of Bucket Cylinder

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

10 Bucket cylinder 11 Bolt 12 Washer 13 Hammer 14 Striking rod 15 Pin