TM-9-2320-280-34
TRUCK, UTILITY: M998 SERIES
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
JANUARY 1996
TM-9-2320-280-34 - Page 267 of 1258
TM 9-2320-280-34
4-3. FUEL INJECTION NOZZLE REPLACEMENT
This task covers:
a. Removal
b. Installation
INITIAL SETUP:
Tools
Manual References (Cont'd)
General mechanic's tool kit:
TM 9-2815-237-34P
automotive (Appendix G, Item 1)
Equipment Condition
Special Tools
•
Hood raised and secured (TM 9-2320-280-10).
Injection nozzle socket (Appendix G, Item 25)
•
Engine access cover removed (TM 9-2320-280-20)
Crowfoot, 19 mm (Appendix G, Item 111)
(rear injection nozzles only).
Crowfoot, 7/8 in. (Appendix G, Item 113)
•
Battery ground cable disconnected
(rear injection nozzle only)
(TM 9-2320-280-20).
Materials/Parts
General Safety Instructions
Gasket (Appendix E, Item 23)
Do not perform this procedure near fire, flames,
or sparks.
Manual References
TM 9-2320-280-10
Maintenance Level
TM 9-2320-280-20
Direct support
TM 9-2320-280-24P
WARNING
Diesel fuel is highly flammable. Do not perform this procedure
near fire, flames, or sparks. Severe injury or death will result.
CAUTION
Cover or plug all hoses, connections, and openings immediately after
disconnection or component removal to prevent contamination.
Remove all plugs prior to connection.
NOTE
The fuel injection nozzle replacement procedures for pre-1990,
1990 and above 6.2 L engines and 6.5 L engines are the same.
Refer to engine decal model number on left rocker arm cover
before ordering replacement parts, since parts are not
interchangeable.
a. Removal
NOTE
•
Removal and installation procedures for all eight injection
nozzles are basically the same. This procedure covers one
injection nozzle.
•
Have drainage container available to catch fuel.
•
Perform step 1 if replacing rear injection nozzles.
1.
Loosen clamps (6) and remove fuel return hose (2) and cap (10) from fuel injection nozzle (7).
2.
Loosen clamps (6) and disconnect fuel return hoses (2) from fuel injection nozzle (7).
3.
Remove screw-assembled washer (4) from clamp (3) and support bracket (1).
4.
Loosen and disconnect two fuel injection line nuts (5) from fuel injection nozzles (7).
5.
Using injection nozzle socket, remove fuel injection nozzle (7) and gasket (8) from cylinder head (9).
Discard gasket (8).
4-2
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