Hitachi ZAXIS 450LC-3, Operator'S Manual

Page: 229 / 477

ASSEMBLING
6-37
CONNECTING ARM CYLINDER ROD
1. To prevent seals from damage, bleed the air from arm
cylinder (2) according to the following procedures.
(1) Start the engine and run it at slow speed.
(2) Sling arm cylinder (2) with a crane. Slowly extend and
retract rod (1).
(3) Repeat operation in step 2 until cylinder rod (1)
moves smoothly.
2. Align rod-pin bore (3) of arm cylinder (2) with pin (4) on
the arm by moving arm cylinder (2) up and down while
extending or retracting cylinder rod (1).
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 arm cylinder (2).
3. After driving the pin into the pin holes, install pin lock
plate (5) with bolts (6).
Tightening torque: 400 N•m (40 kgf•m, 290 lbf•ft)
4. When connecting arm cylinder rod (1) greasing hose to
arm cylinder rod (1), install adaptor (7) with angle (A) of
10 to 30° so that the hose does not come into contact
with arm cylinder (2) mounting bracket.
M167-07-017
1
M1J1-06-022
2
3 4
6
5
M1J1-06-020
M1J1-06-023
A
7