Komatsu PC200-8M0, Shop Manual, Page: 407 / 1254

SEN06127-00
PC200, 200LC, 220, 220LC-8M0 30-101
55
101 Testing and adjusting, Part 1
Testing oil leakage
Testing oil leakage 1
a
Measuring tools for oil leakage
a
Measure the oil leakage under the following
condition.
q
Hydraulic oil temperature: Within operat-
ing 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 mea-
sure for 1 minute.
5) After finishing measurement, return the
removed parts.
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 to arm
IN 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 mea-
sure for 1 minute.
5) After finishing measurement, return the
removed parts.
Symbol Part No. Part name
Q
Commercially
available
Measuring cylinder