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Can't find straight 140wt oil

F

Fullers Farmalls

Member
I got the parts ordered for the tiller rebuild. I didn't get a new drive gear, budget wouldn't allow it this time. I cannot find straight 140 anywhere. I looked at TSC, Napa, Autozone,
Walmart everywhere. I am going to continue to look but may have to settle with 85w-140. Will this work for that tiller rear end? I did order new seals for everything too so I could
go with a lighter weight but don't want to if the original spec calls for 140. Also the TSC in Sayre, PA actually carries a full line of plow shares, cultivator points, and a lot of other
actual farming stuff. I was surprised.
 
Be sure the oil you use is "yellow metal safe". Typically, GL-5 gear oils and some others are NOT.
 
Bob,

Help me please,

GL5 " yellow safe".?

Please expand your description. I am asking politely, with unknown consequence(s).

D.
 
Dennis some gear oil will eat brass or bronze parts. That is why you would need yellow safe oil in a gear case that has bronze gears.
 
You are probably better off with the 85-140 oil. Back when that tiller was made multi vis was a rarity in those ranges. Common in 10-30 as far back as 1955. Who knows when the first multi oils came out I don't think there were any in the 40's.
 
Probably multi vis didn't exist or was in it's infancy and not recommended in many applications over single gra....I remember it having problems for quite awhile after being introduced.....same thing with Synthetic. Apparently things have changed, or OEMs have come to realize the multi vis is the way to go.

There is absolutely no reason to specify 140 at 0 degrees F when it works adequately at 100F. Same thing applies to a lot of the info in yesterday's tractors service manuals........lots of disinformation in todays petroleum world.
 
You would be much better off going to your local lawn mower shop and getting a bottle of Snapper 00 ep grease. Or go to your NH or Deere dealer for corn head grease.
 
I've heard that too, about some additives being detrimental to yellow metals.

What I understand is any hydraulic oil with "AW" (anti wear) prefix is not to be used with yellow metal. The proper oil is "RO" (rust and oxidation) additive.

Does this also apply to oils with "EP" (extreme pressure) additives?

But as far as the tiller, I vote for corn head (semi fluid) grease. It's thin enough not to migrate away from the moving parts, thick enough not to leak from crude design seals that are sure to fail from grit, roots, and grass getting wound around them.
 
Last time I looked in my local O'Reilly's they had 140 gear oil in stock. I was not even looking for it but noticed it when I was getting some 20W-50 oil
 
How about a "Parts City", any nearby? I believe O'Reilly's is corporate-owned, the privately owned stores sell the same stuff, but are branded "Parts City".
 
Either way any good auto parts store should be able to get you the 140W oil in 24 hours or less
 

Straight weight 50 or 60 motor oil is just is vicious, is yellow metal safe and has anti wear additives unlike GL-1. Motor oil won't ruin wet clutch or wet brake components like gear oil does.
 
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