Hitachi ZAXIS 450LC-3 Operator's Manual page 212

10. Connect four hoses between both the right and left
boom cylinders and the machine.
Tightening torque: 180 N•m (18 kgf•m, 130 lbf•ft)
11. To prevent the seal from damage, bleed the air from the
boom cylinder in the following procedures:
(1) Run the engine at slow speed.
(2) Slowly extend or retract boom cylinder rod (8).
(3) Repeat the same operation of the step 2 above until
cylinder rod (8) moves smoothly.
ASSEMBLING
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7
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8
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