Inspect main bearing caps for dents, cracks, or
Main bearings must be removed in
order to determine journal diameter
(dimension A). Remove bearings in
accordance with paragraph 4-10 if
measurement is desired.
(dimension A). Diameter shall be at least 3.266
in. (82.96 mm).
(dimension B). Diameter shall be at least 2.715
in. (68.96 mm).
Out of round shall not exceed 0.002 in. (0.050
mm) for any journal. Maximum taper shall be
0.0005 in. (0.013 mm).
Use care when handling hot gear.
Wear gloves at all times. Do not
overheat gear as damage will occur.
Install locating pin (10) into crankshaft (5).
Heat crankshaft gear (9) at 300 degrees F for 45
minutes. Remove gear from over and mate to
crankshaft, ensuring proper alignment with pin.