Yuchai U35, Руководство оператора

Страница: 134 / 157

5-31
◼
During using accessories (such as breaker hammer), the replacement cycle of
hydraulic oil and filter elements shall be shortened.
Since if the hydraulic hammer is used, the pollution of the hydraulic system is increased and
corrosion is accelerated. Compared with excavating devices, the replacement cycle of
hydraulic oil and filter elements shall be shortened accordingly, so as not to damage the
hydraulic pump and other hydraulic components. The recommended replacement cycle is
as follows: (unit: hour)
Hydraulic hammer
operating rate
Hydraulic oil
changing cycle
Replacement cycle
50
％
1000 Oil return filter element 750, oil
suction filter element 1500
100
％
500 Oil return filter element 500, oil
suction filter element 1000
Note: If a hydraulic hammer is used, the system pressure shall be adjusted
appropriately according to the requirements of the hydraulic hammer.
7. Check the system pressure
Check once every 500 hours.
1) After the hydraulic oil temperature
reaches 50 °C, perform pressure adjustment
and inspection.
2) Use a pressure gauge with a flexible tube,
with a pressure gauge range of
0~30Mpa.
3) Connect M10× 1 pressure gauge with a
direct head to the plunger pump as shown at
①
and
②
in the following figure.
4) Check the pressure setting value of the
main circuit safety valve, which should be
21Mpa±0.2Mpa. If the pressure value does
not meet the requirements, adjust the main
safety valve on the multi-way valve until it
reaches the specified value.
Testing the pilot pressure
1) Unscrew the screw plug of the output
connector of the pilot oil supply valve (as
shown in
①
for the accumulator in the
figure ) and connect it with a straight head
M10 × 1 pressure gauge. The measuring
range is 0~6Mpa.
2) Check the pressure value of the pilot oil
line, which should be 3Mpa ± 0.5Mpa.
If the pressure value does not meet the
requirements, the safety valve at the oil
source valve should be adjusted to reach the
specified value.
Attention: If the pressure of the main oil line, dozer oil line, and pilot oil line can not meet the
requirements, please contact Yuchai service agency.
Pump
Accumulat
or