TM-9-2320-280-20-2
TRUCK, UTILITY: M998 SERIES
TECHNICAL MANUAL; UNIT MAINTENANCE; VOLUME 2 OF 3
JANUARY 1996
TM-9-2320-280-20-2 - Page 28 of 951
3-6. OIL PAN REPLACEMENT
This task covers:
a. Removal
b . Installation
WARNING
Do not drain oil when engine is hot. Severe injury to personnel
will result.
NOTE
Have drainage container ready to catch oil.
1.
Remove oil drainplug (8) and gasket (7) and drain oil. Install gasket (7) and oil drainplug (8) after
oil is drained.
2.
Remove two nuts (9), lockwashers (10), and starter cable support bracket (11) from studs (14).
Discard lockwashers (10).
NOTE
Optional gasket applies to 6.2 L only.
3.
Remove twenty capscrews (6), two large capscrews (13), studs (14), oil pan gasket (4) (if installed),
and oil pan (12) from cylinder block (2). Remove any sealant remains.
4.
Remove oil pan rear seal retainer (15) from rear main cap (1). Discard oil pan rear seal retainer (15).
1.
Apply a bead of sealant to each end of seal retainer (15) and install oil pan rear seal retainer (15) on
rear main cap (1).
NOTE
• Perform step 2 for oil pan gasket (if installed). Perform step 3 for
applying sealant.
• Immediately install oil pan after application of sealant.
2.
Install oil pan gasket (4) on lip of oil pan (12) and align with bolt holes.
3.
Apply a 3/16 in. (5mm) bead of sealant around two large holes (3) on cylinder block (2). Apply
a 3/16 in. (5mm) bead of sealant around oil pan sealing surface (5) following sealant diagram shown.
4.
Install oil pan (12) on cylinder block (2) with twenty capscrews (6), two large capscrews (13), and
studs (14). Tighten capscrews (6) and studs (14) to 4-10 lb-ft (5-14 N
•
m). Tighten large
capscrews (13) to 13-20 lb-ft (18-27 N
•
m).
5.
Install starter cable support bracket (11) on studs (14) with two lockwashers (10) and nuts (9).
6.
Tighten oil drainplug (8) to 20 lb-ft (27 N
•
m).
b. Installation
a. Removal
INITIAL SETUP:
Tools
General mechanic’s tool kit:
automotive (Appendix B, Item 1)
Materials/Parts
Oil seal retainer (Appendix G, Item 207)
Two lockwashers (Appendix G, Item 135)
Oil pan gasket (Appendix G, Item 61)
(optional - used on 6.2 L only)
Sealant (Appendix C, Item 38)
Manual References
TM 9-2320-280-10
TM 9-2320-280-24P
Equipment Condition
• Starter removed (para. 4-8).
• Oil dipstick tube removed (para. 3-2).
General Safety Instructions
Do not drain oil when engine is hot.
TM 9-2320-280-20-2
3-8
Change 3
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