| Compartment | Iron | Chromium | Lead | Copper | Tin | Aluminum | Nickel | Silver | Titanium | Vanadium | Manganese | Antimony | Cadmium | Lithium |
| Engine | Cylinders, Oil Pump, Gears, Crankshaft, Camshaft, Wrist Pins, Valve Train, Rings | Rings, Some Roller or Taper Bearings, Shafts, Valve Train, Exhaust Valves, Coolant Additive | Bearings, Bushings, Solder | Wrist Pin Bushings, Cooler, Bearings, Thrusts, Oil Pump, Turbo charger | Bearings, Bushings, Solder | Pistons, Dirt (as alumina), Bearings, Case, Bushings, Block, Retainers, Turbo, Blower | Gears, Shafts, Bearings, Valve Train, Cam | Tracer in EMD bearings, Solder, Coolant | Shafts, Turbo, additive | Fuel Dilution | Fuel dilution Some steel Alloys in gears | Babbitt bearings
Oil Additive | Contaminant from some fossil fuels. Pigment in paint. | Contaminant – Lithium grease |
| Transmission | Gears, Shafts, Bearings, PTO, Brakes, Disks, Pump, Housing, Shift Spools | Some Roller or Taper Bearings, Shafts, Coolant Additive | Sealing compounds Lead Paint, Solder, Bearings, Bushings | Disks, Bearings, Bushings, Thrusts Cooler, Oil Pump | Sealing compounds Lead Paint, Solder, Bearings, Bushings | Torque, Dirt (as alumina), Thrusts, Bushings, Case | Gears, Shafts, Bearings | Solder, Coolant | Some Shafts, Gears, Bearings, additive | Does not apply | Some steel Alloys in gears | Does not apply | Pigment in paint | Contaminant – Lithium grease |
| Hydraulic | Rotors, Vanes, Pistons, Housing, Gears, Shafts, Valves | Rods, Valves | Pump thrust plates, Bushings | Pump, Cooler, Bearing Cage Bushings, Piston | Pump thrust plates, Bushings | Dirt (as alumina), Case | Gears, Shafts, Bearings | Does not apply | Stainless Steel, additive | Does not apply | Some steel Alloys in gears | Does not apply | Pigment in paint. Water glycol is corrosive to cadmium | Contaminant – Lithium grease |
| Gear Box | Gears, Shafts, Bearings, Housings | Rods, Valves | Bearings, Bushings | Bushings, Thrusts, Bearing Cage Bushings, Piston | Pump Thrust plates, Bushings | Dirt(as alumina) Bushings, Thrusts | Gears, Shafts, Bearings | Does not apply | Some Shafts, Gears, Bearings, additive | Does not apply | Some steel Alloys in gears | Does not apply | Pigment in paint. Electro- plating | Contaminant – Lithium grease |
| Compressor | Bearings, Gears, Case, Valves, Liners, Rings, Shafts, Screws | Shafts, Cams, Rods, Valves, Valve Guides, | Bearings, Bushings | Wrist Pin Bushings, Cooler, Bearings, Thrusts Oil Pump | Bearings, Bushings, Solder | Thrusts, Dirt (as alumina), Shims, Spacers, Bearings, Case, Impellers, Pistons | Gears, Shafts, Bearings, Valve Train, Cam | Does not apply | Some Shafts, Gears, Bearings, blades, additive | Does not apply | Some steel Alloys in gears | Does not apply | Pigment in paint. Electro- plating | Contaminant – Lithium grease |