KCM 70Z7, Operation & Maintenance Manual, Page: 293 / 383

MAINTENANCE
7-52
Check Pilot Circuit Accumulator Function, Gas
Leakage, Looseness, and Damage
--- every 2000 hours
WARNING: Allow only qualified personnel to handle
the accumulator.
y
High-pressure nitrogen gas is enclosed in the
accumulator. (N
2
is inert.)
y
Never strike the accumulator. Keep the accumulator
away from heat sources.
y
Do not weld the accumulator housing.
y
Be sure to release oil pressure before starting to
work on pilot circuits.
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 to ON position. (Do not start the
engine.)
5. Confirm the safety around the machine.
6. Place the lift arm control lever to FLOAT position (C) and
lower the bucket 1 m (40 in) off the ground within 2
minutes after stopping the engine.
7. Place the lift arm control lever to the LOWER position (B)
and lower the bucket the rest of the way to 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.
E
N
D
B
N
A
C
D A
E B
C
N N
G F
MNEC-07-069
M4GB-01-072
MNEC-03-003