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 •Wrench (30 mm) •Hexagon wrench (12 mm) •Hammer •Striking rod •Liftcrane (with the required lifting capacity) •Nylon sling (with the required lifting capacity) •Grease •Rag •Cleaning fluid •Crosstie •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 (1) 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.

[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.

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

[9] Use a hexagon wrench (12 mm) to remove each group of 4 hexagon socket head bolts, and then remove the hoses (7) and (8). •Use caps or 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.

[10]Use a liftcrane 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.

[11]Use a wrench (30 mm) to remove the bolt (11) and spacer (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 pin, be careful not to damage the installed O-rings or dust seals.

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

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.