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UEN00228-04
Measuring oil leakage
a Measuring tools for oil leakage
Symbol
Part No.
Commercially
Q
available
a Measure the oil leakage under the following
condition.
Hydraulic oil temperature: Within operating
q
range
1.
Measuring oil leakage from boom cylinder
1)
Move the boom cylinder to the RAISE
stroke end and stop the engine.
k
Release the residual pressure from
the piping on the boom cylinder
head side. For details, see "Releas-
ing residual pressure from hydrau-
lic circuit" (Operate the lever in the
boom RAISE direction only, how-
ever).
2)
Disconnect hose (1) on the cylinder head
side and block the hose side with a flange.
k
Take care not to disconnect the
hose on the cylinder bottom side.
a Use the following part to block the
hose side.
07379-00640 (Flange #06)
3)
Run the engine at high idle and relieve the
boom circuit by raising the boom.
k
Take care not to "lower the boom".
4)
Start measuring the oil leakage 30 sec-
onds after relieving is started and meas-
ure for 1 minute.
5)
After finishing measurement, return the
removed parts.
52
Part name
Measuring cylinder
1
2.
Measuring oil leakage from arm cylinder
1)
Move the arm cylinder to the IN stroke end
and stop the engine.
k
Release the residual pressure from
the piping on the arm cylinder
head side. For details, see Releas-
ing residual pressure from hydrau-
lic circuit (Operate the lever in the
arm IN direction only, however).
2)
Disconnect hose (2) on the cylinder head
side and block the hose side with a flange.
k
Take care not to disconnect the
hose on the cylinder bottom side.
a Use the following part to block the
hose side.
07379-00640 (Flange #06)
3)
Run the engine at high idle and relieve the
arm circuit by moving the arm IN.
k
Take care not to "move the arm
OUT".
4)
Start measuring the oil leakage 30 sec-
onds after relieving is started and meas-
ure for 1 minute.
5)
After finishing measurement, return the
removed parts.
30 Testing and adjusting
PC210, 230, 240-8
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Troubleshooting
