Installing Boom - Hitachi Zaxis 850LC-3 Operator's Manual

INSTALLING BOOM

WARNING: Never allow anyone to enter into the area
under a lifted boom (2).
1. Pull out the 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.
NOTE: Connect a chain block to one side wire rope (3) to ad-
just the wire rope 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 the boom can be easily
installed on the mainframe.
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.
ASSEMBLING
Boss of
Frame Side
6
6-8
Bracket
1
2
4
Pin
Clearance (a)
Boss of Boom Foot
Mark
M116-07-113
3
M116-07-036
Shim
Cab Side
M1J1-06-018
M116-07-121
5
M116-07-030