Perform plunger-to-barrel leakage test.

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Perform plunger-to-cup tip leakage test.

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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 plunger-to-barrel leakage test. (cont)

TM 9-2815-226-34-2

(3) Place AIR SUPPLY valve OFF.

NOTE

The AIR SUPPLY valve must be OFF whenever other valves are switched either ON

or OFF. The rush of air may blow oil from bubble checker.

(4) Turn TIP SEAT PLUNGER Leakage valve ON and turn AIR SUPPLY valve ON and look for bubbles in

bubble checker. If no bubbles appear within 10 seconds, or if time between bubbles is more than 5

seconds, cup-to-plunger seating is acceptable. If unacceptable, remove injector and retorque cup retainer.

c. Perform plunger-to-barrel leakage test.

(1) Adjust air pressure to 60 psi (414 kPa).

CAUTION

DO NOT OVERLOAD CELL GAGE. DAMAGE TO GAGE MAY OCCUR.

(2) Adjust hand crank to show 200 lbs on load cell gage.

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