FIGURE 4-65. Measuring Main Journal.

TM 55-1905-223-24-4

Determine main bearing clearance as shown in FIGURE 4-65.

Measure the main journal diameters and determine main bearing clearance.

Diameter:

Minimum - 3.2662 inch

(82.962)

-Maximum -

3.2682'inch

(83.013)

Out-of-Roundness: 0.002 inch (0.050mm)

Taper:

0.0005 inch (0.013mm)

FIGURE 4-65. Measuring Main Journal.

Bearing Clearance = Main Bore Diameter with bearing installed - Crank Main journal diameter.

Bearing Clearance Maximum: 0.00475 inch (0.119mm)

REPAIR

a. Remove bearing sleeves (2, and 5, FIGURE 4-69) and straight pin (7).

b. Use a heavy duty puller to remove the spur gear (1) as shown in FICURE 4-67.

FIGURE 4-66. Using Puller.

4-50