|
More than |
Less than |
ISO Code |
|
80,000 |
160,000 |
24<= o:p> |
|
40,000 |
80,000 |
23<= o:p> |
|
20,000 |
40,000 |
22<= o:p> |
|
10,000 |
20,000 |
21<= o:p> |
|
5,000 |
10,000 |
20<= o:p> |
|
2,500 |
5,000 |
19<= o:p> |
|
1,300 |
2,500 |
18<= o:p> |
|
640=
|
1,300 |
17<= o:p> |
|
320=
|
640=
|
16<= o:p> |
|
160=
|
320=
|
15<= o:p> |
|
80<= o:p> |
160=
|
14<= o:p> |
|
40<= o:p> |
80<= o:p> |
13<= o:p> |
|
20<= o:p> |
40<= o:p> |
12<= o:p> |
|
10<= o:p> |
20<= o:p> |
11<= o:p> |
|
5 |
10<= o:p> |
10<= o:p> |
|
2.5=
|
5 |
9 |
|
1.25 |
2.5=
|
8 |
|
ISO Standard for Particle Countin=
g in Oil (Used by all oil anal=
ysis labs) |
|
Number of Particles per ml=
|
|
With today’s high particle counts=
(mostly silica sand) in new and used oils, and with servo valves and equip=
ments super tight tolerances, lab testing and oil scrubbing is a must. Caterpillar’s oil analysis labs u=
se a two number method to report the ISO, ex. - ISO 21/18. The first number refers to the number of part=
icles 5 micron and larger in the sample of oil, while the second number ref=
ers to the number of particles 15 micron and larger. (See ISO Standard for =
Particle Counting Chart). Bec=
ause it is necessary, Caterpillar cleans all new crankcase and hydraulic oi=
l before in-house use at the factory and =
dealer level. Cat has a goal =
of 16/13 for new oils and 18/15 or cleaner for used hydraulic oil. Each time the ISO code number improves =
by one number, the oil is twice as clean.&=
nbsp; So, for an example if the oil starts with an ISO 2=
1/18 and is scrubbed to a ISO 18/15, the first number dropped three numbers=
and the oil is now six times cleaner.&nbs=
p; According to the support letter we received from the Caterpillar =
lab, you could improve engine and hydraulic life a minimum of 2 times and a=
maximum of 7 times for each drop in the ISO c=
ode number. This unbelievable=
equipment life increase is also stated by the SKF Bearing manufacturer ser=
vice bulletin stating that if you keep your dirt particle size smaller than=
the oil film the bearing rides on, you can “achieve infinite life=
221; on a bearing. Super clea=
n all new oils and nearly stop wear on your engines. Super clean used hydra=
ulic fluid (recycle) and continue to use 10,000+ hours wit=
h no ill effects (test to verify the quality), nearly stop wear on the hydr=
aulic system and save thousands on the cost of the hydraulic fluid. Another necessary point to know about t=
he oil analysis test is the 5 micron box, this is the exact number of parti=
cles 5 micron and larger in a particular sample. In the first sample the 5 micron (µ) count was 14,369 particles and in the =
second sample the 5 micron count was 2,495. By scrubbing the used hydraulic oil, 11,874 particles (5 mic=
ron and larger) were removed from 1 milliliter of oil (two tenths of a teas=
poon). Or another way to look=
at this result, there is 3,785 milliliters in a gallon, so for each gallon=
of oil you have removed 44,943,090 particles or 2,471,869,950 per 55 gallo=
n drum! |
|
Oil Transfer Systems |
![](3D"ISOstandards-2_files/image002.jpg")
|
11,874 reduction in particles per 1 milliliter by scr=
ubbing the oil. |
|
|
|
Particle |
Count |
(per 1ml) |
|
|
|
ISO |
|
>5µ |
>10µ |
>15µ |
>20µ |
>25µ |
>50µ |
>75µ |
>100µ |
ISO Code |
|
14,369 |
2,260 |
503<= o:p> |
134<= o:p> |
53 |
9 |
2 |
1 |
21/18 |
|
2,495 |
274<= o:p> |
136<= o:p> |
76 |
49 |
15 |
2 |
1 |
18/15 |