Method For Testing Blowby Pressure By Testing Tool - Komatsu PC500LC-10R Shop Manual

30 TESTING AND ADJUSTING
REMARK
If the obtained value of the blowby pressure exceeds the
standard value, the throttle part (1) may be clogged. Test it
and clean the clogged part, and measure the blowby pres-
sure again.
Remove the testing tools and restore the machine after the test is finished.

METHOD FOR TESTING BLOWBY PRESSURE BY TESTING TOOL

1.
Remove the undercover (5).
2.
Disconnect the blowby gas outlet hose (2).
3.
Install the cap B to the tube on the blowby sensor side.
REMARK
This is to prevent the foreign material from entering.
4.
Install the tool A2 and the adapter A3 of the blowby check-
er A to the disconnected outlet side hose (2), and connect
the gauge A1 to it.
5.
Start the engine.
6.
Select and display "Pre-defined Monitoring" (01/11) by re-
ferring to "SET AND OPERATE MACHINE MONITOR".
7.
Set the engine coolant temperature and the hydraulic oil
temperature so that it is within the testing condition range.
8.
Set the working mode to P ("Power Mode").
9.
Turn the swing lock switch to ON position.
REMARK
If the swing lock switch is turned on, the main relief valve is set for high-pressure relief.
10. Turn the fuel control dial to MAX (High idle) position.
11. Test the blowby pressure when the pressure is relieved at arm IN and one-touch power maximizing is ap-
plied.
Read the blowby pressure when the pointer of the gauge is stabilized.
PC500LC-10R
TEST BLOWBY PRESSURE
30-35