Garrett Bearing troubleshooting guide

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red_dot.gif (873 bytes)                         Normal Use   Acceptable operating & maintenance procedures
  red_dot.gif (873 bytes)                       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
    red_dot.gif (873 bytes)       red_dot.gif (873 bytes)             Severely contaminated (dirty oil)
      red_dot.gif (873 bytes)   red_dot.gif (873 bytes)   red_dot.gif (873 bytes)           Pounded by eccentric shaft motion   Foreign object damage, coked or loose housing, excessive bearing clearing due to lube problem
        red_dot.gif (873 bytes)         red_dot.gif (873 bytes)       Center housing bearing bores, rough finish   Incorrect cleaning of ctr. hsg. during overhaul of turbo.  (Wrong chemicals, bores sand or bead blasted)
            red_dot.gif (873 bytes)             Metal or large particle oil contamination   Severe engine wear.  i.e., Bearing damage, camshaft or lifter wear, broken piston
              red_dot.gif (873 bytes)       red_dot.gif (873 bytes)   Lack of lube, oil lag, insufficient lube   Low oil level, high speed shutdowns, lube system failure, turbo plugged w/ R.T.V.
                red_dot.gif (873 bytes)         Coking   Hot shutdowns, engine overfueled, restricted or leaking air intake
        red_dot.gif (873 bytes)         red_dot.gif (873 bytes) red_dot.gif (873 bytes)     Fine particles in oil (contaminated oil)   See contaminated oil
                    red_dot.gif (873 bytes)     Rough bearing journals on shaft   Bearing journals not protected from sand or bead blast cleaning during overhaul