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 65 of 1258

3 - 4 . LEFT CYLINDER HEAD REPA
I R
This task covers:
a.
Removal
c.
Installation
b.
Repair
a. Removal
INITIAL SETUP:
To o l s
_____
General mechanic's tool kit:
automotive (Appendix G, Item 1)
M a t e r i a l s / P a rt s
_____________
Gasket (Appendix E, Item 18)
Antiseize compound (Appendix B, Item 7)
Pipe sealing compound (Appendix B, Item 49)
Cylinder head lifting device (optional)
(Appendix C, Figure C-48)
Personnel Require d
________________
One mechanic
One assistant
Manual Refere n c e s
________________
TM 9-2320-280-20
TM 9-2320-280-24P
TM 9-2815-237-34
TM 9-2815-237-34P
Equipment Condition
_________________
• Fuel drain back tube removed (TM 9 - 2 3 2 0 - 2 8 0 - 2 0 )
.
• Alternator brackets removed (TM 9±-±2±3±2±0±-±2±8±0±-±2±0±)±
.
• Left exhaust manifold removed
(±T±M 9±-±2±3±2±0±-±2±8±0±-±2±0±)±
.
• Water crossover removed (TM 9-2320-280-20).
• Rocker arm shaft and pushrods removed
(para. 3-8).
• Fuel injection return hoses removed
(±T±M 9±-±2±3±2±0±-±2±8±0±-±2±0±)±
.
• Fuel injection nozzles removed (para. 4-3).
• Glow plugs removed (TM 9±-±2±3±2±0±-±2±8±0±-±2±0±)±
.
• Modulator linkage removed (TM 9-2320-280-20).
General Safety Instructions
______________________
• Cylinder head must be supported during removal
and installation.
• Gaskets installed on some 6.2L engines assembled
prior to 1991 may contain asbestos. Gaskets
should be disposed of IAW current directives.
Maintenance Level
_______________
Direct support
TM 9-2320-280-34
3 - 8
Change 1
1.
Disconnect harness lead 33B (8) from engine temperature sending unit (7).
2.
Remove capscrew (1) and two leads 58A (2) and 3A (3) from cylinder head (4).
WARNING
• Cylinder head must be supported during removal and installation.
Failure to support cylinder head may cause injury to personnel or
damage to equipment.
• Gaskets installed on some 6.2L engines assembled prior to 1991 may
contain asbestos. Gaskets should be removed with a scraper or putty
knife and then disposed of IAW current directives. Inhalation of
asbestos fibers can cause respiratory ailments
CAUTION
Cover or plug all hoses, ports, and/or fittings immediately after
disconnection or component removal to prevent contamination.
Remove all plugs prior to connection.
NOTE
The left cylinder head replacement procedures for 1990 and above
engines and previous model engines are the same. Refer to engine
decal model number on left rocker arm cover before ordering
replacement parts, since parts are not interchangeable.


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