Injection Test - Takeuchi TB 175 Handbuch

5.6.2. Injection test

After adjusting the nozzIe to the specified starting pressure, check the fuel spray condition and seat oil tightness.
(1) Check seat oil tightness
After two or three injections, gradually increase the pressure up to1.96MPa (20kg/cm
maintain the pressure for 5seconds, and make sure that no oil is dripping from the tip of the nozzle.
Test the injection with a nozzle tester；retighten and test again if there is excessive oil leakage from the overflow coupling.
Replace the nozzle as set if oil leakage is still excessive.
（2）injection spray condition
Operate the nozzle tester lever once to twice a second and check for abnormal injection.
5.6.2.1. Hole type nozzles
Replace hole type nozzles that do not satisfy the following conditions：
● Proper spray ang1e（θ）
● Correct injection angle （α）
● Complete atomization of fuel
● Prompt starting /stopping of injection
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）before reading the starting pressure
2