Hitachi ZAXIS 450LC-3, Operator'S Manual

Page: 207 / 477

ASSEMBLING
6-15
INSTALLING BUCKET
1. Install the Unit Type O-rings (only Long Arm Spec)
around the bucket bosses at the arm connecting section.
(In case using Separate Type O-rings, refer to “O-ring
Installation Method” in the maintenance section.)
2. Start the engine. Raise arm (2) tip approximately 2.5 m
(2.7 yd) above the ground.
3. Sling bucket (6) with a crane. Align pin (5) hole of the
bucket with pin hole (4) of arm (2).
4. While the top of the bucket boss contacts arm (2), adjust
the clearance between arm (2) and bucket (6) to become
from 0.5 mm to 1.5 mm (0.02 in to 0.06 in) by Shims.
(Refer to the page for “Adjust the Bucket Linkage” in the
maintenance section.)
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.
• While installing the bucket pin, never allow anyone
to enter into the area under bucket (6).
5. Drive pin (5) into the pin bosses. Secure pin (5) with bolt
(8) and nuts (9).
Tightening torque: 400 N•m (40 kgf•m, 290 lbf•ft)
6. While extending or retracting the bucket cylinder, align
pin hole (3) of the link with that of bucket (6).
7. Drive pin (7) into the bucket and link. Secure pin (7) with
bolt (10) and nuts (11).
Tightening torque: 400 N•m (40 kgf•m, 290 lbf•ft)
8. Slide the O-ring onto the boss end gap between bucket
(6) and arm (2). (Refer to the page for “Change Bucket ” in
the maintenance section.)
M1J1-06-024
M116-07-038
M503-07-056
M1J1-07-072
M116-07-039
10
1
Arm
Bucket Boss
2
3
4
5
6
7
Clearance Adjust Part
Pin
Bucket
Shim
Arm
2
4
8
5
9
6
11