Komatsu PC88MR-10 Shop Manual page 413

2) Disconnect drain hose (7) and block the
hose side by using a plug.
a Use the following parts to block the hose.
07376-70315 (Plug #03)
3) Remove left exterior cover (11), and
disconnect connector (CN-V03) (12) of the
swing parking brake solenoid valve.
PC88MR-10
30 Testing and adjusting
4) Start the engine, run it at high idle, relieve the
swing circuit, and measure the leakage at
this time.
a Action level L03 is displayed on machine
monitor.
a 30 seconds after starting relief, measure
the amount of leakage for 1 minute.
5) Swing 180 deg. and check the amount of
leakage again.
a Perform removal and installation of the
connectors after the engine is stopped.
a Check it after the connectors of the swing
parking brake solenoid valve have
already been removed.
6) Restore the machine after finishing the test.
7. Testing oil leakage of travel motor
1) Remove travel motor cover.
2) Start the engine, lock the travel mechanism,
and stop the engine.
Insert pin [1] between the sprocket
and the track frame to securely lock
the track.
3) Disconnect drain hose (8) of the travel motor
and block the hose side by using a plug.
a Use the following parts to block the hose.
07376-70315 (Plug #03)
4) Start the engine, run it at high idle, relieve the
travel circuit, and measure the leakage at
this time.
Hydraulic system
30-63