Test Oil Leakage; Method For Testing Oil Leakage From Boom Cylinder; Method For Testing Oil Leakage From Arm Cylinder - Komatsu PC500LC-10R Shop Manual

TEST OIL LEAKAGE

TEST OIL LEAKAGE
Tools for testing oil leakage
Symbol Part No.
A Commercially
available
B 07379-01044
C 07376-70522
Commercially
D
available
Commercially
E
available
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Place the machine on a level ground, and then lower the work equipment completely to the ground in
a stable posture. Set the lock lever to LOCK position, and then stop the engine.
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Parts and oil are still very hot immediately after the engine is stopped. It may cause burn injury. Wait
for the temperature to go down, and then start the work.
Check this item under the following conditions.
Hydraulic oil temperature: 45 to 55 °C
For testing oil leakage to perform troubleshooting, refer to this section.

METHOD FOR TESTING OIL LEAKAGE FROM BOOM CYLINDER

1.
Set the boom cylinder at RAISE stroke end, and stop the engine.
2.
Release the remaining pressure from the piping on the boom cylinder head side by referring to "RELEASE
REMAINING PRESSURE FROM HYDRAULIC SYSTEM".
REMARK
Operate the lever only with the boom RAISE direction to release the remaining pressure.
3.
Disconnect the hose (1) on the cylinder head side and
block the hose side by using plug C.
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Be careful not to disconnect the hose on the cylin-
der bottom side.
4.
Start the engine.
5.
Select and display "Pre-defined Monitoring" (01/11) by re-
ferring to "SET AND OPERATE MACHINE MONITOR".
6.
Adjust the hydraulic oil temperature so that it is within the
specified range.
7.
Turn the fuel control dial to MAX (High idle) position.
8.
Operate the work equipment control lever to relieve the
pressure in the boom RAISE circuit.
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Be careful not to operate the lever to "Boom LOWER" side.
9.
30 seconds after the relief is started, measure the oil leakage for 1 minute.
See STANDARD VALUE TABLE, "STANDARD VALUE TABLE FOR MACHINE" for standard values.
Restore the machine after finishing the test.

METHOD FOR TESTING OIL LEAKAGE FROM ARM CYLINDER

1.
Set the arm cylinder at IN stroke end, and stop the engine.
2.
Release the remaining pressure from the piping on the arm cylinder head side by referring to "RELEASE
REMAINING PRESSURE FROM HYDRAULIC SYSTEM".
30-96
Part name
Measuring cylinder
Flange
Plug
Plate
Pin
30 TESTING AND ADJUSTING
Q'ty Remarks
1
2 Size: 10
1 Size: 4
1 Size: 250x260x32
1 Size: φ 200x80
PC500LC-10R