Stern tube oil above 60 °C
Kobelco Compact Seal CX-500, oil-lubricated stern tube seals (aft and forward)
Possible cause
Bearing damage, cooler or thermometer fault
What to do
Manufacturer's manual, p. 31Check for white metal, slow down, repair cooler
See the assembly on the 3D model
Other Kobelco Compact Seal CX-500 faults
Sudden drop of stern tube oil levelLeak from aft or forward sealEmulsified oil or seawater in drainDamaged No.1/No.2 rings or trapped foreign matterFresh water in drainLeak from aft peak tankForward seal tank level changesNo.4 or No.5 ring damage
From the manufacturer's manual “EM-35 KOBELCO COMPACT SEAL-STERNTUBE SEALING”. Check against the original on board before work.