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Normal Use |
Acceptable operating & maintenance procedures |
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Contaminated
oil (dirt in oil) |
Engine oil and oil filter(s) not changed frequently enough, unfiltered air entering engine
intake, malfunction in prelube valve or oil filter bypass valve |
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Severely
contaminated (dirty oil) |
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Pounded by
eccentric shaft motion |
Foreign object damage, coked or loose housing, excessive bearing clearing due to lube
problem |
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Center housing
bearing bores, rough finish |
Incorrect cleaning of ctr. hsg. during overhaul of turbo. (Wrong chemicals, bores
sand or bead blasted) |
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Metal or large
particle oil contamination |
Severe engine wear. i.e., Bearing damage, camshaft or lifter wear, broken piston |
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Lack of lube,
oil lag, insufficient lube |
Low oil level, high speed shutdowns, lube system failure, turbo plugged w/ R.T.V. |
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Coking |
Hot shutdowns, engine overfueled, restricted or leaking air intake |
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Fine particles
in oil (contaminated oil) |
See contaminated oil |
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Rough bearing
journals on shaft |
Bearing journals not protected from sand or bead blast cleaning during overhaul |
