8-3
MAINTENANCE OF HYDRAULIC OIL AND
FILTER
As machine with an hydraulic breaker provides
the hydraulic oil becomes severely
contaminated.
So, unless frequently maintained, the machine
may easily go out of order.
Inspect and maintain hydraulic oil and 4 kinds of
filter elements in particular, in order to prolong
machine life.
Replace when the breaker work is used for short
time according to the standard of right graph.
RELEASE THE PRESSURE IN BREAKER
CIRCUIT
When breaker operating is finished, stop engine
and push pedal or switch for breaker to release
pressure in breaker circuit.
If pressure still remains, the lifetime of the
diaphragm in the accumulator will be shortened.
Be careful to prevent contamination by dust, sand
and etc.
If such pollution become mixed into the oil, the
pump moving parts will wear abnormally, shorten
lifetime and become damaged.
When operating breaker, bolts and nuts of main
equipment may be loosened by vibration. So, it
must be inspected periodically.
1)
(1)
(2)
(3)
(4)
3. MAINTENANCE
Service interval
Attachment
Bucket
Breaker
Operating
rate
100%
100%
Hydraulic
oil
2,000
600
Filter
element
250
100
Replace following filter same time
Hydraulic return filter : 1EA
Pilot line filter : 1EA
Element in hydraulic tank breather : 1EA
Drain filter cartridge : 1EA
2)
3)
4)
Filter replace guide for hydraulic breaker
Oil change guide for hydraulic breaker
Operating hours of machine(Hr)
50
100
150
200 250
100
80
60
40
20
0
Time to replace
filter elements
Average
operating
rate of
machine
(%)
unit : hours
100
80
60
40
20
0
500
1000
1500
2000
Operating hours of machine(Hr)
Time to change oil
Average
operating
rate of
machine
(%)
