72
Oil System
Wear Particles
The analysis values used for comparison
with each other must always come from the
same engine. The results must be evalued
with the knowledge of where the particles
originate from. The particle level (ppm) de-
pends on:
—
Oil and filter system total volume
—
Oil volume when taking sample
—
Oil consumption
—
Driving conditions, fuel consumption
—
Time between oil changes
Wear
Particles:
Cause/Origin
Normal Levels
(ppm)
Fe - Iron
Crankshaft, liners, camshaft, tappet, valve guides
<100
Pb - Lead
Big end and main crankshaft bearing shells
<20
Cu - Copper
Big end and main crankshaft bearing shells
<20
Sn - Tin
Surface layer of sliding bearings
<20
Cr - Chrome
Piston rings, valve rod
<10
Al - Aluminum
Pistons
<10
Ni - Nickel
Layer between the surface and copper layers on a
sliding bearing.
<5
Si - Silicon
Sand, dirt, etc.
<20
Insolubles
Carbonized oil, combustion particles, soot
<1.8%
(by weight)
Water
Coolant liquid, condensation water
<0.1%
(by weight)
Fuel Dilution
Incomplete combustion
<3.0%
(by weight)
Antifreeze - Gly-
col
High levels of sodium and boron indicate coolant
leak
Should not
occur
Total Base Num-
ber (TBN)
1
TBN shows the remaining alkalines used for acid
neutralization
>4.0
> = more than; < = less than
1
According to ASTM D2896
Recommendations
To get the best service life out of the en-
gine, use oil sampling in addition to regular
maintenance. Oil analysis should only be
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Страница 191: ...Service Charts 187 AXLE LOAD TIRE PRESSURE Axle Load lb kg Recommended tire pressure psi kPa W1000109 ...
Страница 192: ...188 Service Charts Tire Record Size Ply Rating Make Type Serial No ...
Страница 193: ...Service Charts 189 Tire Record Mileage Date Installed Date Removed At Installation At Removal Tire Mileage Notes ...
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Страница 197: ...Service Charts 193 Tire Record Mileage Date Installed Date Removed At Installation At Removal Tire Mileage Notes ...
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