Figure 4-44. Main Bearing Cap, Removal/Installation.

TM 55-1930-208-24

4-13. MAIN BEARINGS - Continued.

a. Removal - Continued.

(5) To remove rear bearing upper shell, tap shell of the edge of the bearing with a small curved rod (figure 4-44),

revolving the crankshaft at the same time to roll bearing shell out.

(6) Remove upper halves of thrust washers (4, figure 4-43) by pushing on the ends of the washers with a small

rod, forcing them around and out of the main bearing support.

NOTE

The lower halves of the crankshaft thrust washers (4) will be removed along with rear bearing cap .

(7) Remove lower bearing shell (5) from bearing cap (2).

Figure 4-44. Main Bearing Cap, Removal/Installation.

b. Cleaning.

(1) Clean bearing caps and bearing shells with clean fuel oil (item 9, Appendix C). (2) Wipe off excess fuel oil and

allow to dry.

c. Inspection.

(1) Inspect bearing shells for scoring, pitting, flaking, etching, loss of babbitt or signs of overheating.

(2) Inspect back side of bearing shells for bright spots. If such spots are present, discard bearing shells.

4-56