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TM 5-2420-222-34
8-4.
TRANSMISSION COUNTERSHAFT AND BEARING SUPPORT MAINTENANCE
(Con’t).
6.
Using mechanical gear and bearing puller kit, remove ball bearing (3) from helical gearshaft (7).
7.
Using retaining ring pliers, remove retaining ring (20) from ball bearing (22) and countershaft (8).
8.
Using mechanical gear and bearing puller kit, remove ball bearing (22) from countershaft (8).
c.
CLEANING AND INSPECTION
WARNING
Dry cleaning solvent, P-D-680, is toxic and flammable. Always wear protective
goggles and gloves, and use only in a well-ventilated area. Avoid contact with
skin, eyes, and clothes, and DO NOT breathe vapors. DO NOT use near open flame
or excessive heat. The solvent's flash point is 1000F-1380F (38°C-590C). If you
become dizzy while using cleaning solvent, Immediately get fresh air and medical
help. If solvent contacts eyes, Immediately wash your eyes and get medical aid.
1.
Clean all metal parts with dry cleaning solvent. Dry thoroughly with clean, dry rags.
2.
Inspect helical gearshaft, countershaft, low range bevel gear, collar, sleeve, and two thrust washer bearings for
cracks, bends, breaks, and missing or damaged teeth or splines. Replace if defective.
3.
Inspect ball bearings (see TM 9-214).
4.
Inspect springs for cracks, breaks, and abnormal bends. Using spring tester and torque wrench, compress
springs to 1.5 in. (38.1 mm) and check compression force on torque wrench. Compression force must be 31-39
lb.-ft. (42-53 N-m).
5.
Inspect bearing support for cracks, bends, breaks, and damaged threads.
d.
REPAIR
Restore damaged bearing support (6) threads using screw threading set.
e.
ASSEMBLY
NOTE
Ball bearings must be assembled with end opposite retaining ring groove entering
bearing support first.
1.
Using remover and installer and arbor press, install ball bearing (3) in bearing support (6) until bottom edge of
retaining ring groove is flush with bearing support boss.
2.
Using retaining ring pliers, install retaining ring (2) in bearing support (6) and ball bearing (3).
3.
Using remover and installer and arbor press, install ball bearing (22) in bearing support (6) until bottom edge of
retaining ring groove is flush with bearing support boss.
4.
Using retaining ring pliers, install retaining ring (21) in bearing support (6) and ball bearing (22).
5.
Using arbor press, install countershaft (8) in ball bearing (22) until retaining ring groove is visible.
8-22
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