Installing Boom Cylinder - Hitachi ZAXIS 450LC-3 Operator's Manual

INSTALLING BOOM CYLINDER

IMPORTANT: Take care not to mix up the right and left
cylinders. Install the cylinder with the
cylinder piping positioned downward.
1. Pull out boom foot pins (2) until the end of the pin is
flush with the inside end of the bracket.
2. Apply a film of grease to pins (2).
3. Lift up left-hand boom cylinder (3) with a crane.
d
WARNING:
• When aligning the centers of the pin and pin hole,
never put fingers into the pin hole.
• When using a hammer, wear safety equipment
such as safety glasses or a hard hat to protect
against injury from flying pieces of metal.
• When inserting the pin, never enter into the area
under boom cylinder (3).
4. Align boom cylinder (3) bottom hole with the boss hole
on the frame. Measure clearance "a. " If clearance "a" is 4
mm (0.16 in) or more, remove the shim on the pin and
install it , as illustrated.
5. Align pin hole (4) on the bottom side of boom cylinder
(3) with pin hole (5) on the main frame to drive pin (2) in.
Take care not to damage the seal at this time.
6. Tighten bolts (6) to secure pin lock plate (1).
Tightening torque: 400 N•m (40 kgf•m, 290 lbf•ft)
ASSEMBLING
Boss of Main
Frame Side
Clearance (a)
6-31
Bracket
2
Shim
Pin
Boss of Bottom Side
of Boom Cylinder
5 4
6 1
Bracket
M1JB-06-008
M1JB-06-009
3
M1JB-06-010
M1JB-06-011