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#4785926 - 06/13/18 01:47 PM Grease incompatibility: from metal base or other?
Elkins45 Offline

Registered: 05/07/18
Posts: 2
Loc: Northern KY
I have read for years that you need to clean out all of the existing grease before adding new in case the new grease is incompatible. It even says that on the grease container. I would like to know if that incompatibility is due to the metal base of the grease or if itís because of certain additives?

So letís say my tractor came from the factory lubricated with a lithium grease. Would I be OK using any other lithium based grease? Thereís really no way to know which particular product was used and I donít want to go running to the Kabota dealer every time I need a tube of (overpriced) grease.

My main concern is with trailer bearings. Is there a way to test if the grease in my gun is compatible with the grease thatís already in the bearings, or do I just have to bite the bullet and pull down the hubs of my new used trailer and repack them?

Edited by Elkins45 (06/13/18 01:47 PM)

#4785991 - 06/13/18 03:48 PM Re: Grease incompatibility: from metal base or other? [Re: Elkins45]
salesrep Offline

Registered: 08/22/03
Posts: 3600
Loc: lllinois
Grease incompatibility is dependent on the thickener.

High quality Specialized Lubricants pay for themselves!

#4786720 - 06/14/18 02:08 PM Re: Grease incompatibility: from metal base or other? [Re: Elkins45]
Elkins45 Offline

Registered: 05/07/18
Posts: 2
Loc: Northern KY
I suppose there's no easy way to determine what kind of grease is already there?

#4788504 - 06/16/18 07:03 PM Re: Grease incompatibility: from metal base or other? [Re: Elkins45]
RDMgr Offline

Registered: 11/02/09
Posts: 18
Loc: USA
Incompatibility can be based on thickeners, additives and base oils. The ASTM method for determining compatibility of binary grease systems looks at both thickener and chemical compatibility. Thickener incompatibility usually results in consistency changes beyond the range established by the performance of the neat greases. Chemical compatibility usually results in loss of performance such as corrosion protection, EP or anti-wear.

As far as what kind of grease is used for factory fill, go on their website and try to find a PDS or SDS. This may give you a type but it won't give you compatibility with other commercial greases

#4788822 - 06/17/18 04:52 AM Re: Grease incompatibility: from metal base or other? [Re: Elkins45]
Silk Offline

Registered: 07/26/03
Posts: 4566
Loc: New Zealand
For wheel bearings it's standard practice to strip, clean and repack. For bushes and any other greaseable point, you just squirt in what's in your gun.
1987 BMW R65 - Penrite V Twin 20/50
2005 Nissan Expert - Gulf Western 10W-40
1996 Volvo T5 - Penrite HPR15 - 15W-60. Ryco syntec filter.