Hitachi ZAXIS 450LC-3, Operator'S Manual

Page: 201 / 477

ASSEMBLING
6-9
INSTALLING BOOM
d
WARNING: Never allow anyone to enter into the area
under a lifted boom (2).
1. Pull out boom foot pin (1) until the end of the pin is flush
with the inside end of the right side bracket.
2. Apply a film of grease to pin (1).
3. Lift up boom (2) with a crane.
f
NOTE: Connect a chain block to one side wire rope (3) to
adjust wire rope (3) length to position the boom
easily.
4. Make a mark appointing the outer fringe of the boom
foot boss on the inside surface of the boom mounting
bracket of the mainframe, so that boom (2) can be easily
installed on the mainframe.
d
WARNING:
• When aligning the center 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 the boom.
5. Align the boom bottom hole with the boss hole on the
frame. Measure clearance “a.” If clearance “a” is 1 mm or
more, remove the shim on the pin and install it on the
cab side, as illustrated
6. Push boom foot pin (1) in. (Refrain from driving the pin in
with a hammer if possible. The pin can be easily inserted
by hand if alignment, of the pin and pin hole, is correct.)
7. Secure boom foot pin (1) with plate (5) and bolts (6).
Bolt tightening torque: 400 N•m (40 kgf•m, 290 lbf•ft)
8. Lower the boom tip to the ground.
M116-07-113
M116-07-030
M1J1-06-018
M116-07-036
M116-07-121
Bracket
1
3
2
4
Pin
Cab Side
Clearance (a)
Shim
Boss of Boom Foot
Boss of
Frame Side
5
6
Mark