Measuring Oil Leakage - Komatsu Galeo PC800-8 Shop Manual

30 Testing and adjusting

Measuring oil leakage

a Measuring device for oil leakage
Symbol Part Number
T Purchased
a Measure the oil leakage under the following
condition.
• Hydraulic oil temperature: 45 – 55°C
1. Measuring leakage from boom cylinder
1) Run the engine and raise the boom to the
stroke end.
k Referring to "Release of residual pres-
sure from hydraulic circuit", release the
residual pressure from the piping on the
boom cylinder head side (Operate the
lever only in the RAISE direction, how-
ever).
2) Disconnect hoses (1) on the cylinder head
side and block it 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.
07379-01260 (Flange #12)
3) Run the engine at high idle and relieve the
boom cylinder by operating the boom con-
trol lever in the RAISE direction.
k Take care not to operate the boom con-
trol lever in the LOWER direction.
4) Start measuring the oil leakage 30 seconds
after the boom cylinder is relieved and
measure for 1 minute.
5) After finishing measurement, return the
parts.
PC800, 850-8
Part Name
Measuring cylinder
2. Measuring leakage from arm cylinder
1) Run the engine and move in the arm to the
stroke end.
k Referring to "Release of residual pres-
sure from hydraulic circuit", release the
residual pressure from the piping on the
arm cylinder head side (Operate the le-
k Since you will work on a high place, pre-
ver only in the IN direction, however).
pare a stable foothold.
2) Disconnect hose (2) on the cylinder head
side and block it 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.
07379-01470 (Flange #14)
3) Run the engine at high idle and relieve the
arm cylinder by operating the arm control
lever in the IN direction.
k Take care not to operate the arm con-
trol lever in the OUT direction.
4) Start measuring the oil leakage 30 seconds
after the arm cylinder is relieved and meas-
ure for 1 minute.
5) After finishing measurement, return the
parts.
SEN00912-02
17