Baroness GM1700, Руководство по обслуживанию

Страница: 54 / 192

Measurement
Note
The most effective way of solving problems in
the hydraulic system is to use a measuring
instrument such as a pressure gauge for
measurement.
Before hydraulic measurement
Important
Before concluding that the problem in the
hydraulic system is caused by the hydraulic
equipment, every part of the hydraulic system
must be checked for issues related to oil fill,
oil filter, loosening of fasteners, lack of
adjustment and so on.
Note on hydraulic measurement
Warning
As mentioned in the testing procedure, the
use of a pressure gauge not meeting the
pressure measurement standard may result in
damage to the pressure gauge or leakage of
high-pressure oil. Be extremely careful with
high-pressure oil as it may pierce your skin,
resulting in personal accidents.
Carry out hydraulic measurement with two or
more persons. One person should be in the
driver's seat to operate the machine and the
other person should engage in measurement
and recording.
Caution
When checking the hydraulic circuit for
pinhole leaks or oil leakage from nozzles,
never use your hands. Use items such as
paper or corrugated cardboard to find leakage
points. Be extremely careful with high-
pressure oil as it may pierce your skin,
resulting in personal accidents.
Always clean the machine before hydraulic
measurement. Remember that the machine
must always be kept clean for hydraulic
measurement. Contamination may lead to
clogging or breakage of the hydraulic circuit.
Review the measuring method before
starting measurement.
Before measurement, check for
maladjustment, clogging or breakage. 1.
2.
3.
Warm up the hydraulic oil before starting
hydraulic measurement.
Warning
Be sure to depressurize the hydraulic system
before inspecting or repairing it.
When hydraulic equipment is removed, cap
or plug it to prevent contamination of the
hydraulic system.
When using a measuring instrument such as
a pressure gauge, connect the in/out hoses
correctly. Never connect the other way round
to prevent breakage of the hydraulic system
and measuring instrument.
Screw in the hydraulic fitting by hand till it
touches the other side lightly, then fasten it
with a wrench.
Fit hoses and measuring instruments in such
a way as to avoid contact with the driving
part of the machine.
After connecting a measuring instrument,
check the amount of oil in the hydraulic tank.
Check to see that the engine is in good
condition. Carry out hydraulic measurement
with the engine running at maximum speed.
In case there is any problem in the traveling
circuit, carry out the following measurement.
Charge relief valve pressure
Traveling relieve valve pressure
In case there is any problem in the raise/
lower or steering circuit, carry out the
following measurement.
Relief valve pressure
4.
5.
6.
7.
8.
9.
10.
11.
[1]
[2]
12.
[1]
GM1700
Hydraulic system
Page 4-26
Measurement