TM 5-3805-260-24
NOZZLE ASSEMBLY TROUBLESHOOTING GUIDE
PROBLEM
CAUSE
CORRECTION
Return Leakage High1. 1.Too much wear or scratches at
1 Make replacement of nozzle
guide
assembly
2.Parts are bad
2 Make replacement of nozzle
assembly
Return Leakage Low
1 Foreign material on valve
1 Clean area with solvent
2.Not enough clearance
2 Make replacement of nozzle
assembly
opening Pressure Not Correct
1 Adjustment wrong
1 Make adjustment See ADJUST-
MENT OF 9N3979 FUEL NOZZLES
2.Parts are bad
2 Make replacement of nozzle
assembly
Tip Leakage
1 Deposits in seat area
1. Disassemble and clean nozzle
2.Seat for valve bad
2 Make replacement of nozzle
3.Parts have failed
3 Make replacement of nozzle
4.Crack at tip of nozzle
4 Make replacement of nozzle
make replacement of nozzle
assembly
Orifice Discharge Is Not Correct
1 Orifices have a restriction or are
1 Clean orifices, if office are bad,
2.Crack at tip of nozzle
2 Make replacement of nozzle
3 Debris inside nozzle at bottom of
3 Clean nozzle See Special In-
tip
structlon Form No. SEHS7292
for cleaning procedures
4.Adjustment of lift screw not correct
4. Make adjustment See ADJUST-
MENT OF 9N3979 FUIEL
NOZZLES
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