TM 5-3895-382-24 Table 11 Tools Needed 5P-4150 Tester Group 1 5P-7448 Adapter 1 6V-2170 Tube Assembly 1 8S-2245 Cleaning Tool Group 1 8S-2270 Fuel Collector 1 1U-8857 Extension 1 6V-6068 SAE J-967 Calibration 1 Fluid Illustration 55 (1) Connection for the nut (not shown) of the fuel supply line (2) Threaded hole for the banjo bolt of the fuel return line (3) Nut of the fuel injector nozzle (4) Wire clip (5) Seat washer Illustration 56 Fuel injector nozzles and lines. (1) Nut for the fuel supply line (2) Banjo bolt (6) Fuel supply line (7) Fuel return line 1. Run the engine at low idle. 2. Loosen the nut for the fuel supply line (1) at each fuel injector  nozzle.    Listen  for  the  low  idle  to  decrease  or become rough at each cylinder. 3. The fuel injector nozzle is defective when the fuel supply line (1) is loosened and the following events occur: The engine rpm does not decrease. The engine does not idle roughly. Remove the fuel injector nozzle for additional testing. NOTE: If leakage occurs at the nut for the fuel supply line (1), make sure that the fuel supply line (6) and the nut   for   the   fuel   supply   line   (1)   are   correctly aligned   with   the   inlet   connection   of   the   fuel injector nozzle (1).  Do not tighten the nut for the fuel supply line (1) on the high pressure fuel line more than the recommended torque.  If the nut is tightened    more,    the    fuel    line    may    become restricted or the threads of the fuel injector nozzle and the nut may be damaged. Cleaning Of Fuel Injector Nozzles Before   a   fuel   injector   nozzle   is   tested,   remove   any   loose carbon  from  the  tip  of  the  fuel  injector  nozzle.    Do  not  use abrasive material or a wire brush in order to clean the nozzle. The fuel injector nozzle is not a serviceable part. Disassembling or adjusting the nozzle will violate the standards of emissions. 6-66