TM 5-3810-300-24&P-3
Fuel Injector
2.1.1
for the N-90, 7B5E, B55E and B65 are from 138
minimum to 162 maximum.
NOTE: The reference value obtained
when pop testing the needle valve
injectors is to be used as a trouble
shooting and diagnosis aid. This allows
comparative testing of injectors without
disassembly.
Exact valve opening
pressure values can only be determined
by the Needle Valve Tip Test using
tester J 23010 and tip test adapter J
23010-129 or auxiliary tester J 22640.
Injector High Pressure Test
This test checks for leaks at the filter cap gaskets, body
plugs and nut seal ring.
1. Clamp the injector properly and purge the air from the
system.
2. Close the Thru-Flow valve, but do not overtighten.
Fig. 14 - Assembling Injector Valve Parts on Tip Tester
Adapter J 23010-129
3. Position the injector rack in (he full-fuel position.
4. Place pump lever I in the vertical position.
5. Move lever 3 to the forward detent position.
6. Operate pump lever I uniformly and observe the spray
pattern produced.
Fig. 15 - Adapter and Tube Assembly on Injector Tester
The highest pressure reference number shown on gage
J 23010
2 will be reached just before injection ends. Use the
following reference values to determine the relative
acceptability of the injector. Reference values for Series
71 injectors, except the N-90, 7B5E, B55E and B65 are
from 127 minimum to 146 maximum. Reference values
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