High Fe content - Reasons | Noria Message Boards

Read our primer articles on Oil Analysis and Tribology

We have got the following oil analysis results for our pump The analysis stated that the Iron analysis result for this sample deviates significantly from the historical trend of analysis results for ths sample point. The lubricant data is as follows:

Visc @100Deg C (cst) 12.8
SAE Viscosity 40
Oxidation 4
PQ index 2
TBN (mg KOH/gm) 9.5

Wear elements - ppm(mg/kg) Al - 2, cr - 2, Cu - 4, Fe - +20 (historical trend for Fe was 11,12,13 )
Contaminant elements - B- 3, K-0, Na -7, Si-7, V-0

Could you please let me know what could be the conditions that contributed to this Fe deviation.
Thanks

8/16/103:48 AM

❤️ 0

Original Post

Replies sorted oldest to newest

robertcMember

What kind of bearings?

What does the vibe data look like?

Is the sample taken from a fixed point?

plastic drop tube?

First thing I'd do at these levels is resample for confirmation.

Then start looking at roller bearings.

Assuming there are rollers.

8/16/108:49 AM

❤️ 0

hussamadeniMember

Data can sometimes be very "scary," by a 80%-90% increase, in Fe in this instance. Best to take such data with a pinch of salt. Can this data be mapped with performance? or lack of it.

Has there been a dramatic change in temp, sound, vibrations etc... Let the other operating factors, also assist you in reaching a conclusion, there is something amiss.

If there has been, you need to sit up and start investigating.

6/2/118:58 PM

❤️ 0

rttechMember

Hi Keep in mind the Fe in this instance will be particle < 8µm in size and as mentioned by Hussam may not be significant, when monitoring gearbox, bearing, pump applications the only area accurate on contamination will be particle count and PQ, if these two move and the Fe follows most likely there is a problem, to sort at present resample and process as a wear debris analysis viewed by microscope.
Regards
Rob S
www.rttech.com.au

6/23/113:42 PM