TM 5-3825-229-14&P
6-12. CRANKSHAFT AND MAIN BEARINGS (cont)
a.
Removal (cont).
Mark bearing caps (3, 4 and 5) to aid in assembly.
(1)
Remove ten screws (1) and flat washers (2).
(2)
Remove one rear bearing cap (3), three intermediate bearing caps (4) and one front bearing cap (5).
(3)
Remove one rear lower bearing (6), three intermediate lower bearings (7) and one front lower bearing (8)
from crankshaft journals. Mark bearings with the number of the journal from where they were removed.
(4)
Carefully lift crankshaft (9) from upper bearings in crankcase.
(5)
Remove one upper rear bearing (1 0), two intermediate bearings (11), one intermediate upper bearing (12)
and one front upper bearing (13). Mark bearings with the number of the journal from which they were
removed.
b.
Inspection.
(1)
Clean crankshaft and bearings and dry thoroughly.
(2)
Inspect journals for chipping, cracking and signs of overheating. Replace crankshaft if any of these
conditions exist.
(3)
Clean bearing caps and bearings to remove all grease and dirt.
(4)
Inspect bearing caps for cracks, nicks and damage. Replace any damaged bearing caps.
(5)
Inspect bearings for nicks, scratches and wear.
(6)
Measure thickness of bearings with a micrometer. Thickness of bearing should be a minimum of 0.0943 in.
(2.374 mm). Maximum thickness should be 0.0953 in. (2.421 mm).
6-31
