30 Testing and adjusting UEN00228-04
PC210, 230, 240-8
13
Measuring blow-by pressure 1
a Measuring tools for blow-by pressure
k Stop the machine on a level ground and
lower the work equipment to the ground.
a Measure the blow-by pressure under the fol-
lowing condition.
q Engine coolant temperature: Within oper-
ating range
q Hydraulic oil temperature: Within operat-
ing range
1. Remove the undercover of the hydraulic pump.
2. Install tool and adapter [1] of blow-by checker
D1 or blow-by tool D2 to breather hose (1) and
connect gauge [2].
3. Start the engine, set the working mode in the
power mode (P), and turn the swing lock
switch ON.
a If the swing lock switch is turned ON, the
main relief valve is set for high-pressure
relief.
4. While running the engine at high idle, relieve
the arm circuit and measure the blow-by pres-
sure.
a Read the gauge when the pointer is stabi-
lized.
5. After finishing measurement, remove the
measuring tools and return the removed parts.
Symbol Part No. Part name
D
1 799-201-1504 Blow-by checker
2 799-790-3300 Blow-by tool
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