TESTING AND ADJUSTING
MEASURING OIL LEAKAGE
MEASURING OIL LEAKAGE
*
Hydraulic oil temperature when measuring: 45 - 55°C
1. Work equipment cylinder
*
If the hydraulic drift of the work equipment is outside
the standard value, measure the leakage inside the
cylinder as follows, and judge if the cause of the
hydraulic drift is in the cylinder or in the control valve.
If the leakage is withing the standard value, the
problem is in the control valve.
If the leakage is greater than the standard value,
the problem is in the cylinder.
Fully extend the rod of the cylinder to be meas-
rued, then stop the engine.
Disconnect piping (1) at the head end, the block
the piping at the chassis end with a blind plug.
Be careful not to disconnect the piping at the
bottom end.
0
0
1)
2)
A
3)
4)
Start the engine and apply the relief pressure to
the bottom end of the cylinder with the engine at
high idling.
Continue this condition for 30 seconds, then
measure the oil leakage for the next OI
minute.
X17FRO29
Bucket cylinder
Posture for measuring boom cylinder
Posture for measuring arm. bucket cylinder
X17FR032
X17FR033
Arm cylinder
20-58
a
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