Mobil has been less than helpful, looking for the Mobil product that will work in a Wabtek wBO air compressor. Any help would be appreciated. Thanks in advance.

Googled “Wabtec wBO air compressor oil” and a PDF document was the first on the search list.

Scrolling to page 13, it outlines the specifications required for the oil, which any
oil supply house should be able to decipher.

http://techinfo.wabtec.com/DataFiles/O& ... 4202-2.pdf

“…Compressor Oil for Heavy Duty Compressors, for operations
at ambient temperatures below +10° F (-12° C) ATSM
Viscosity Grade Number SUS @ +10° F = 215 (ISO V.G.
46). Wabtec Corporation Specification M-7615-20. This oil
shall be a high quality, solvent refined, paraffin base or suitable
blend. Additives to inhibit foaming, rust, oxidation, and wear
are required. DETERGENTS ARE NOT PERMISSIBLE. Anti-
wear additives are recommended.
Compressor Oil for Heavy Duty Compressors, for operation
at or above ambient temperature above +10° F (-12° C) ATSM
Viscosity Grade Number SUS @ +10° F = 315 (ISO V.G.
68). Wabtec Corporation Specification M-7616-20. This oil
shall be a high quality, solvent refined, paraffin base or suitable
blend. Additives to inhibit foaming, rust, oxidation, and wear
are required. DETERGENTS ARE NOT PERMISSIBLE. Anti-
wear additives are recommended.
Compressor Oil for Heavy Duty Compressors, for high
ambient temperatures operations at or above +125° F (52°
C) ATSM Viscosity Grade Number SUS @ 100° F = 465
(ISO V.G. 100). Wabtec Corporation Specification M-7617.
This oil shall be a high quality, solvent refined, paraffin base
or suitable blend. Additives to inhibit foaming, rust, oxidation,
and wear are required. DETERGENTS ARE NOT
PERMISSIBLE. Anti-wear additives are recommended…”

John

Post Script: Additional search related to viscosity information

https://bobistheoilguy.com/viscosity-charts/

Sounds like the Mobil Rarus 400 series compressor oils would fill the bill. Rarus 427, an ISO 100 oil that matched the viscosity of the third item above is commonly available; McMaster Carr stocks it in gallons and fives. I'm sure it's available in 55 gallon drums from Mobil distributors. Digging a bit, I see a whole series is available from ISO 32 to ISO 150.

More info here:

https://www.mobil.com/en/industrial/Lub ... -Rarus-427

Thank you for the help, I appreciate you taking the time.

Use interlube carbonless air compressor oil. Carbon will jamb the check valves because they overheat causing deposits.. Some of the synthetic compressor oils will breakdown the carbon deposits but these oils are hard on gaskets.

http://www.interlubecorp.com/compressor.asp

I suppose everybody knows to clean and wipe out the crankcase of any carbon.

Deleted

I don't think we are talking about steam compressors here. Wabtec WBO is used on diesels.

Routine maintenance was to flush the air side with a hot lye solution to remove carbon and crud.

A couple thoughts:

WBO would be a Gardner-Denver design not a Westinghouse. Wabtec may have rebuilt it, but not a Westinghouse design like a 3-CD.

Lubricant for a Gardner Denver varies with the size of the sump on the various models. A high base 3 cylinder uses R&O 32 or equivalent. Medium and low base use an SAE 30, although we've used the SAE 40 Diesel Engine Oil in them with good success.

There was a good discussion of this in an EMD "Pointers" article from back in the day as well as the appropriate MI.

Your results may vary.

ETA
Hot Air, Tennessee

Yes, and after clicking on 'submit' a little bell started ringing, Wabtec and WBO should not be in the same sentence.

I believe Triangle is a Wabtec company now, so even though it was not their design, they do in fact rebuild them and no doubt tag them with a Wabtec logo. But yes, confusing if you don't know.

On all our Gardner-Denver compressors irrespective of base height we use R&O 68 Turbine/Hydraulic Oil ISO VG 68.

EBL

How often do you change the oil?