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TM10-4320-316-14
Figure 5-2. Fuel Injector Valve Assembly Replacement.
b.
Test.
(1)
Use nozzle test to check injection starting pressure. Pressure should be 2,844 psig (200 kg/cm2) +142
psig (10 kg/sq cm).
(2)
Spray pattern should be equal.
(3)
Pressurize injector nozzle to 2,030 psig (140 kg/sq cm) for 60 seconds and check for leaks.
(4)
If injector nozzle fails either test, replace.
c.
Installation.
(1)
Install new fuel injection nozzle gasket (6) and spacer (7) onto fuel injection nozzle (5) before
installing nozzle into cylinder block.
NOTE
Make sure nozzle and sleeve surface is clean. Carbon deposits will build up on
nozzle in the form of flowers. Flowering lowers combustion performance
significantly.
5-7
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