TM 5-3805-260-24
CAUTION
Do not tighten the cap more than torque shown or the new O-ring seal will be damaged.
4. Put fuel injection nozzle (1) on the 5P4150 Nozzle Tester with the nozzle tip in the 8S2270 Fuel Collector and
FT1384 Extension.
5. With gauge protector valve (E) open, pump the tester until cap (4) is completely full of fuel and the pressure
on the gauge is 4000 psi
27 500 kPa).
NOTE: 15 to 20 strokes of the pump can be necessary for the pressure to reach 4000 psi (27 500 kPa).
CAP LEAKAGE SPECIFICATION
There must be no leakage between the cap and the body of fuel injection nozzle
There must be no leakage between the cap and the body of fuel injection nozzle. 6. If there is leakage, make a
replacement of I H 1023 Seal (7) and inspect cap (4) for cracks. Test the nozzle again. If there is still leakage,
replacement of fuel injection nozzle is neces-sary.
INSTALLING CARBON DAM
2. Carbon dam. 3. Seal. N. 8S2252 Carbon Seal Tool.
7. If no fuel leakage is found, fuel injection nozzle is acceptable. Slide new seal (3) into position over the nozzle.
Install new carbon dam (2) in nozzle groove with 8S2252 Carbon Seal Tool (N).
TROUBLESHOOTING OF 9N3979 FUEL
INJECTION NOZZLES
Use the guide that follows to troubleshoot for problems with the pencil-type fuel injection nozzles
2-43
