Understanding Used Oil Analysis-

This information is very general and is based on numerous manufacturer machine types and models and is intended as a guideline ONLY. Each machine and component will have its own trend that is generated over a period of at least 3 sampling intervals at oil change. This is due to the different environments, operating conditions and drain intervals each company or machine may have. Therefore your wear limits maybe slightly higher or lower than the limits listed.

AGAIN THIS IS A VERY GENERAL GUIDELINE.

We at Advantage Maintenance Services hope this information will enable you to better understand your oil analysis reports.

GENERAL TABLE OF WEAR LIMITS

DIESEL ENGINES

.................Normal.......Caution.....Critical

Iron............(0 - 75).....(76 - 125)....(126+)

Copper.......(0 – 50).....(51 – 75)......(76+)

Chromium...(0 – 8 )......(9 – 15)........(16+)

Aluminum....(0 – 15).....(16 – 20)......(20+)

Lead.............(0 – 25).....(26 – 35)......(36+)

Silicon..........(0 – 20).....(21 – 30)......(31+)

POWERSHIFT TRANSMISSIONS

Iron............(0 - 150)....(150-300)......(300+)

Copper.......(0 – 300)....(300-600).....(600+)

Chromium...(0 – 5)......(5 – 9)......(10+)

Aluminum....(0 – 10)......(11 – 15)....(16+)

Silicon.........(0 – 35)......(35 – 50)....(50+)

HYDRAULIC & STEERING

Iron............(0 - 25)..... (26 - 40)....(300+)

Copper.......(0 – 75)......(76 - 150)...(150+)

Chromium...(0 – 4)........(5 – 9).....(10+)

Aluminum....(0 – 10)......(11 – 23)....(24+)

Silicon.........(0 – 15)......(16 - 25)....(25+)

DIFFERENTIALS & FINAL DRIVES

Iron............(0 - 500)....(500 - 800)...(800+)

Copper........(0 – 75).....(75 - 150)....(150+)

Chromium....(0 – 6)......(7 – 15)......(15+)

Aluminum....(0 – 15).....(16 – 45).....(45+)

Silicon..........(0 – 35).....(35 – 50).....(50+)

GEARBOX APPLICATIONS

Iron.............(0 - 300)....(300 - 400)...(400+)

Copper........(0 – 150)....(150 - 350)...(350+)

Chromium....(0 – 8)......(8 – 15)......(15+)

Aluminum....(0 – 25).....(26 – 75).....(75+)

Silicon..........(0 – 50).....(51 - 80).....(80+)

WEAR ELEMENT SOURCES

ENGINES

Iron (Fe) – Crank/Cam Shafts, Valves, Seats & Guides, Cylinder Walls, Liners, Timing Gear, Oil Pump, Air Compressor

Copper (Cu) – Oil Cooler Core Tubes, Rocker Arm Bushings, Wrist Pin Bushings, Timing Gear Thrust Washers, Oil Pump Drive Thrust Washer, Governor Bushings, Service Meter Drive Gear, Fuel Transfer Pump Bushings, BrakeSaver, Cooling System Problems/Overheating, Crankshaft bearings

Chromium (Cr) – Piston Rings, Crankshafts, Exhaust Valves, Accessory Drive, Turbo-Charger bearing

Aluminum (Al) – Main & Rod Bearings, Oil Pump Bushing, Timing Gear Cover, Crankshaft Thrust Bearing, Rocker Arms, Fuel Pump Lifter, Piston, Dirt Entry (Clay Soils

Lead (Pb) – Main & Rod Bearings, Turbo-Charger bearing, Camshaft Bearings, Timing Gear Bearing

Silicon (Si) – Dirt Entry, Silicon Gasket Material, Coolant Additives

Sodium (Na) – Coolant Additives

TRANSMISSIONS

Iron (Fe) – Gears, Discs, Brake Drums, Wet Brakes, Bearings

Copper (Cu) – Powershift Discs, Steering Clutch Discs, Bushings & Washers, Oil Cooler Core, Slippage

Chromium (Cr) – Bearings

Aluminum (Al) –Pump Bushing, Torque Converter Impellor or Turbine, Bushings

Silicon (Si) – Dirt Entry, Silicon Gasket Material, Coolant Additives, Some Brake Linings

DIFFERENTIAL, FINAL DRIVES & Gear Applications

Iron (Fe) – Gears, Sprockets, Wet Brake Linings

Copper (Cu) – Thrust Washers, Oil Tubes, Pump Bushings

Chromium (Cr) – Bearings

Aluminum (Al) –Oil Pump Drive Gear, Dirt Entry – Duo-Cone Seal/Retainer

Silicon (Si) – Dirt Entry, Silicon Gasket Material

HYDRAULIC SYSTEMS

Iron (Fe) – Pumps, Cylinders

Copper (Cu) – Pump Bushings, End Plates

Chromium (Cr) – Pump Ring, Cylinder Rod

Aluminum (Al) – Cylinder Rod bushing, Pump Body, Dirt Entry

Silicon (Si) – Dirt Entry, Silicon Gasket Material, Cylinder Rod Damaged