Testing Blowby Pressure - Komatsu PC200-8M0 Shop Manual

SEN06127-00

Testing blowby pressure

a Measuring tools for blowby pressure
Symbol Part No.
1 799-201-1504 Blowby checker
D
2 799-790-3300 Blowby tool
k
Stop the machine on a level ground and
lower the work equipment to the ground.
a Measure the blowby pressure under the follow-
ing condition.
q Engine coolant temperature: Within oper-
ating range
Hydraulic oil temperature: Within operat-
q
ing range
1. Remove the undercover of the hydraulic pump.
2. Install tool and adapter [1] of blowby checker
D1 or blowby 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 blowby pres-
sure.
a Read the gauge when the pointer is stabi-
lized.
16
30-101
1
Part name
101 Testing and adjusting, Part 1
5. After finishing measurement, remove the mea-
suring tools and return the removed parts.
PC200, 200LC, 220, 220LC-8M0

Testing blowby pressure