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TM 5-4320-313-14
b. Test. (Refer to figure 5-5).
(1) Visually inspect injector (1) for scoring or burning. Inspect to see if injector is bent, cracked, or damaged. If
injector is damaged, replace it.
(2) Connect testing device (3) to injector pump (4) and injector (1).
Make sure side connection (5) is tightly locked.
• Death or serious injury could occur if fuel is not handled carefully. Use in a well-ventilated area away
from open flame. Do not smoke.
• Serious injury could result from injector fuel spray. Keep hands away from fuel spray.
NOTE
Prior to testing injector, make sure throttle control hand lever is in the HIGH position.
(3) Crank engine by hand. As the engine is cranked, read fuel injection pressure on the gauge and check fuel spray
pattern from injector. Injection pressure should be 1920 to 1928 psi (135 to 143 bar). Fuel should spray out in an
even spray pattern. If spray pattern does not conform to above, replace injector. If injector nozzle drips fuel before
or after it has reached recommended injection pressure, replace injector.
Figure 5-5. Fuel Injector Test Set-Up.
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