Check Pilot Circuit Accumulator Function, Gas Leakage, Looseness, And Damage - Hitachi ZW 120-6 Operator's Manual

Check Pilot Circuit Accumulator Function, Gas
Leakage, Looseness, and Damage
--- every 2000 hours
d
WARNING:
 Allow only qualified personnel to handle the
accumulator.
 High-pressure nitrogen gas is enclosed in the
accumulator. Caution is required to prevent fires
from occurring.
 Never strike the accumulator. Keep the accumulator
away from sparks and/or flames.
 Do not directly heat the accumulator. Do not weld
the accumulator housing.
 Be sure to release pressure before starting to work
on the pipe lines.
1. Park the machine following the same procedures as
described on page 7-7 for preparation of inspection/
maintenance work.
2. Raise the lift arm at the maximum height, and then set
the lift arm control lever in the Neutral (N) position.
3. Turn the key switch OFF to stop the engine.
4. Turn the key switch ON but do NOT start the engine.
5. Confirm the safety around the machine.
6. Place the control lever to FLOAT position (C) and lower
the bucket 1 m off the ground within 2 minutes after
stopping the engine.
7. Place the control lever to the LOWER position (B) and
lower the bucket on the ground.
8. Ensure the lift arm does not stop halfway. If the lift
arm stops halfway, the accumulator function may be
deteriorated. Consult your nearest authorized dealer for
check and repair.
MAINTENANCE
C
B
D
G
7-49
E
N
A
F
C
B
D
N
A
MNCB-07-007
MNCB-01-006
E
M4GB-01-074