Hitachi ZAXIS 210LC-5N Operator's Manual page 51

Arm cylinder Removal
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WARNING:
 NEVER insert your fingers into pin holes when
aligning the pin holes.
Serious personal injury may result.
 Guard against injury from flying pieces of metal.
Wear goggles or safety glasses, and safety
equipment appropriate to the job.
 Do not enter underneath the arm cylinder when
removing pins.
1. Operate arm cylinder (21) until it becomes slightly longer
than the fully retracted state.
2. Lower the boom and rest the end of the arm on the
ground.
3. Hoist and hold arm cylinder (21) with ropes.
Lightly support the cylinder without pulling on the crane
rope too tightly at this time.
Take care not to allow wire rope to slide on the cylinder.
4. Release remaining pressure from the piping of arm
cylinder (21).
Refer to the "Operator's Manual for Hitachi Excavator" for
releasing pressure.
5. Remove pin (24) connecting arm cylinder (21) and arm
(22).
6. Fully extend arm cylinder (21).
7. Slightly hoist wire rope. Place a wooden block on boom
(25). Slowly lower arm cylinder (21) onto the block.
DISASSEMBLING • ASSEMBLING
4-19
22
24
21
M1T1-SL1-001
21
25
M1T1-SL1-002