Above: Copper particles ranging in size up to 40µm
Info Centre >> Fuel and Lube Oil Technical Manual >> 7. Lube Oil - Test Results >> 7.8 Spectrochemical Oil Analysis >> 7.8.3 Copper and Alloys
Reciprocating engine:
Bearings; wrist pin and valve train bushings; other bushings and thrust washers; oil cooler tubing. Also may be present as on oil additive or a crossover contaminant from a leaking transmission seal.
Turbine engine:
Some main and accessory bearing retainers; bushing and nuts; some oil control valves.
Transmission:
Discs; bearings; bushings and thrust washers; oil cooler tubing.
Torque converter:
Retainers and separators.
Differential:
Bearings; bushings; retainers, and thrust washers.
Final drive/reduction gearbox:
Bearings; bushings, retainers and thrust washers; oil cooler tubing.
Hydraulic:
Bearings and bushings; swash plate cups; valves; some pistons; some pump cylinders; oil cooler tubing.
Compressors:
Bearings; bushings, thrust washers and retainers; oil cooler tubing.