Perform check ball leakage test.

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Perform plunger-to-barrel leakage test. (cont)

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TM-9-2815-226-34-2 Engine Diesel 6 Cylinder Inline Turbocharged Cummins NTC-400 BC2 Manual

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Perform injector spray pattern check.

TM 9-2815-226-34-2

d. Perform check ball leakage test.

(1) With plunger still in retracted position (0.047 in [1.193 mm] on dial indicator), and TIP SEAT PLUNGER

Leakage and AIR SUPPLY valves OFF, turn CHECK BALL LEAKAGE valve ON.

(2) Turn AIR SUPPLY valve ON and adjust air pressure to 80 psi.

NOTE

If lowest reading on flowmeter is 1 or 10, both equal one unit.

(3) Observe flowmeter. If reading exceeds 6 units of leakage, inspect check ball seat for condition and replace

check ball.

(4) Turn AIR SUPPLY valve OFF and CHECK BALL LEAKAGE valve OFF.

(5) Remove injector from tester.

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