Replace/Repair Crankshaft and Main Bearing Group. (FIGURE 4-56)

TM 55-1905-223-24-4

4-13. Replace/Repair Crankshaft and Main Bearing Group. (FIGURE 4-56)

This task covers:

Disassembly, b.

Cleaning and Inspection,

Repair,

Assembly.

INITIAL SETUP

Tools

Equipment Condition

Tool kit, general mechanic's rail

Engine removed from vessel to a shop

and marine diesel engines,

location.

Combination wrench set, metric

10 mm thru 24mm,

5120-01-046-4979

Heavy duty gear puller P/N ST-647

Tool kit, measuring, machinists

Torque wrench kit P/N 3377216

Materials/Parts

Solvent, Item 20, Appendix C

Crankshaft P/N 3908031

Nylon brush, Item 2, Appendix C

Sleeve bearing half set P/N 3802010

Lubricating oil, Item 14, Appendix C

DISASSEMBLY

a. Rotate the engine to a horizontal position and remove the main cap bolts as shown in FIGURE 4-56.

FIGURE 4-56. Main Cap Bolt Removal.

b. The main caps should be numbered. If they are not, be sur to mark them with the correct number as shown in

FIGURE 4-57.

4-45