Replace Pilot Circuit Accumulator; Check Ride Control Accumulator Function, Gas Leakage, Looseness, And Damage; Check Gas Pressure In Ride Control Accumulator; Check Gas Pressure In Steering Accumulator - Hitachi ZW140-6 Operator's Manual

Replace Pilot Circuit Accumulator

--- every 4000 hours or once every two years
whichever comes first.
Consult your authorized dealer for replace.
Check Ride Control Accumulator Function, Gas
Leakage, Looseness, and Damage
--- every 500 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.
Let the machine travel with the ride control switch turned
AUTO and OFF to compare the machine's vertical vibration
during travel. Travel the machine at the speed faster than 5
km/h. If the machine's vertical vibration is not dampened
when letting the machine travel with the ride control function
activated, the accumulator may be faulty. Consult your
authorized dealer for check and repair.

Check Gas Pressure in Ride Control Accumulator

--- every 2000 hours
Check the gas pressure at a regular interval. Ask your
authorized dealer for checking.

Check Gas Pressure in Steering Accumulator

--- every 2000 hours
Check the gas pressure at a regular interval.
Check the gas pressure in case the machine vibrates and the
turning is not smooth when the steering wheel is operated.
Consult your authorized dealer for checking the gas pressure.
MAINTENANCE
7-58
MNDF-07-015
MNDF-07-016
MNDF-07-017