TM 9-2320-272-24-4
5-19. FUEL INJECTOR REPAIR
THIS TASK COVERS:
d. Non-Top Stop Injector Assembly
a. Non-Top Stop Injector Disassembly
e. Top Stop Injector Assembly
b. Top Stop Injector Disassembly
c. Inspection
INITIAL SETUP:
MATERIALS/PARTS
APPLICABLE MODELS
Injector overhaul kit (Appendix D, Item 255)
M939/A1
Diesel fuel (Appendix C, Item 42)
SPECIAL TOOLS
Drycleaning solvent (Appendix C, Item 71)
Cup retainer wrench (Appendix E, Item 162)
REFERENCES (TM)
Crowfoot injector wrench-(Appendix E,
TM 9-2320-272-24P
Item 164)
Adjusting wrench (Appendix E, Item 3)
EQUIPMENT CONDITION
Locknut wrench (Appendix E, Item 165)
Fuel injectors removed (para. 4-32).
Injector body wrench (Appendix E, Item 70)
GENERAL SAFETY INSTRUCTIONS
TOOLS
General mechanic's tool kit (Appendix E, Item 1)
l Keep fire extinguisher nearby when using
Torque wrench (Appendix E, Item 144)
drycleaning solvent.
l Drycleaning solvent is flammable and toxic. Do
Magnifying glass
not use near an open flame.
a. Non-Top Stop Injector Disassembly
1.
Remove injector link (1) from injector (8). Set injector link (1) aside to prevent damage.
WARNING
Drycleaning solvent is flammable and toxic. Do not use near open
flame and always have a fire extinguisher nearby when solvents
are used. Use only in well-ventilated places, wear protective
clothing, and dispose of cleaning rags in approved container.
Failure to do this may result in injury or death to personnel and/or
damage to equipment.
CAUTION
Improper cleaning methods and use of unauthorized cleaning
solvents can damage equipment.
2.
Clean exterior of injector (8) with drycleaning solvent (para. 2-14).
CAUTION
Injector barrel and plunger are a matched pair (class fit). Do not
l
interchange.
l Do not touch internal parts unless hands are clean and
moistened with diesel fuel. Failure to do so may result in
damage to internal parts.
3.
Remove plunger (2) and spring (3) from injector (8). Store plunger (2) by standing on end.
4.
Remove small O-ring (4) and two large O-rings (5) from injector (8). Discard O-rings (4) and (5).
5.
Remove screen retaining ring (6) and screen (7) from injector (8). Discard retaining ring (6) and
screen (7).
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