Inspection. - TM-10-3930-673-340177

TM 10-3930-673-34

c. Inspection.

(1)

Inspect main bearing halves (5 and

6) and thrust bearing (2). Replace

bearing if:

back of bearing shows that fretting has

taken place,

back of bearing has a mirror-like

(shiny) finish,

there are scratches in the bearing

surface which do not disappear after

cleaning,

bearing surface has material damage

such as cracks or flaking,

there is a hole in the bearing surface,

bearing shows wear on the mating

face,

bearing oil hole is distorted,

there are hot spots in bearing surface,

and/or

bearing has damage to the tab.

(2)

Inspect thrust bearing (2) flanges for

damage. If damaged, replace thrust

bearing.

TR01416

(3)

Inspect main bearing bores in the

block for cracks, chips, distortion, thread damage, or other damage. Replace cylinder

block if there is bearing bore damage.

(4)

Inspect and measure crankshaft (1) main bearing journals (Para 3-8).

(5)

Inspect main bearing caps (3) for cracks, fretted or chipped mating surfaces, distortion,

or damaged ring dowels.

(a)

Replace a damaged bearing cap (3).

(b)

Replace both bearing cap ring dowels if one or both are damaged.

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