TM 5-1940-277-34
MAIN BEARING INSPECTION AND REPLACEMENT INSTRUCTIONS
This task covers:
a.
Removal
b.
Inspection
c.
Installation
INITIAL SETUP
Tools:
Equipment Condition:
Condition Description:
Torque wrench (0-175 ft-lb)
Page 2-179
Engine assembly removed
5/8 in socket
from boat and mounted
Ratchet
on engine maintenance
Micrometer caliper, inside
stand or laid on side
Micrometer caliper, outside
on top of work bench.
Engine maintenance stand
Page 2-317
Flywheel and flywheel
Non-metallic hammer
housing removed.
Handle, socket wrench
Page 2-307
Oil sump (pan) removed.
15/16 in socket
Materials/Parts:
Shell main bearing wide upper with oil hole (2 each)
Shell main bearing narrow upper with oil hole (5 each)
Shell main bearing wide lower (2 each)
Shell main bearing narrow lower (5 each)
3-47
