20-5. CRANKSHAFT AND MAIN BEARINGS REPLACEMENT/REPAIR (CONT)
Diesel fuel is flammable. Keep diesel fuel
away from open fire and keep a fire
extinguisher within easy reach when
working with diesel fuel. Do not smoke
when working with diesel fuel. If fuel is
spilled, clean it up immediately. Failure to
comply may result in serious injury or
death to personnel.
If crankshaft main or connecting rod bearing
journals are found to be out of tolerance,
crankshaft must be replaced and new main
bearings installed. Failure to comply may
result in damage to equipment.
Replace any part that fails visual inspection
or size measurement requirements.
(1) Clean crankshaft (1), main bearings (2), and main
bearing caps (3) thoroughly with diesel fuel.
(2) Inspect seven crankshaft main bearing journals (4) for
cracks and evidence of overheating.
Check crankshaft main bearing journals in
two places, 90 degrees apart, on each main
bearing journal. Do not use area immediately
around oil hole where journal surface is
Failure to comply may result in
(3) Check dimensions of seven crankshaft main bearing
journals (4). Refer to Table 20-5. Crankshaft Main
Bearing Journal Diameters.