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 632 of 951
6-2. FRONT PROPELLER SHAFT ASSEMBLY MAINTENANCE
This task covers:
a. Removal
c. Installation
b. Inspection
INITIAL SETUP:
Tools
General mechanic’s tool kit:
automotive (Appendix
B, Item 1)
Materials/Parts
Cotter pin (Appendix G, Item 17)
(Basic/A1 Series)
Cotter pin (Appendix G, Item 18)
(A2 Series)
Manual References
TM 9-2320-280-10
TM 9-2320-280-24P
NOTE
Propeller shaft bearing caps should be taped together to prevent
loss of bearings.
1.
Remove four capscrews (3) and two bearing straps (2) from front propeller shaft assembly (4) and
differential pinion yoke (1).
NOTE
Step 2 applies to all vehicles except M1097, “A1” and “A2” series.
Step 3 applies to M1097, “A1” and “A2” series.
2.
Remove four capscrews (10) and two bearing straps (9) from front propeller shaft assembly (4) and
transfer case output yoke (7).
3.
Remove four nuts (14), washers (15), and two U-bolts (16) from front propeller shaft assembly (4) and
transfer case output yoke (7).
4.
Remove cotter pin (13), washer (12), and transfer case shift rod (11) from transfer case shift lever (6).
Discard cotter pin (13).
5.
Remove two nuts (17), washers (18), capscrews (20), washers (18), and center bearing (19) from
engine mount (21).
6.
Move front propeller shaft assembly (4) forward, then rearward over top of transfer case (5) and
pipe (8), and remove front propeller shaft assembly (4).
1.
Inspect drive shaft (23) and coupling shaft (24) for cracks and damage. Replace either (para. 6-3) if
cracked or damaged.
2.
Inspect grease fittings (25) and universal joints (22) for serviceability. Replace universal joints (22)
(para. 6-7) or grease fittings (25) if unserviceable.
3.
Inspect center bearing (19) for roughness or damage. Replace coupling shaft (24) (para. 6-3) if center
bearing (19) is rough or damaged.
b. Inspection
a. Removal
TM 9-2320-280-20-2
6-2
Change 3
1
2
3
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