I almost hate to even ask-M4864A

Hdonly

Member
Oil discussions can get out of hand sometimes, but...... My 651 manual calls for M4864A in the hydraulic section and "mild extreme pressure SAE 80 in the tranny and rear axle housing. Some of the forum post around the net say that these are one in the same: an 80w mineral oil. If they are the same, why doesn't the manual say so? Anyway, TSC sells " Ford All Mineral 90
Transmission Fluid" Is something like this what I need and does it go in all three holes? I am really curious because my 3point lift is a little weak after working it for a while and the very clean fluid in it seems awful thin. I just bought this tractor so I have no idea what's in it. Been trying to get in touch with the PO to find out.
 
Your manual doesn't say so, because the common replacement multi purpose UTF oil in existance today, didn't yet exist back when
your manual was printed in the 1950's.... weird huh!

Go find a M2C134 compatible UTF oil. It can go in all 3 holes.

Alternately, you can put in 80w90 gl4/5 in the tranny and diffy, and UTF or ISO type hyd oil in the hyds.

Your call.
 
SAE 80W gear oil and 80w mineral oil are two different things. The mineral oil is actually closer in viscosity to 30 weight engine oil. As has been said, a good UTF that says on the label that it meets or exceeds the Ford/New Holland M2C134D specification will work fine in all 3 sumps. It is the proper viscosity for the hydraulics system, plus it has EP additives for Extreme Pressure conditions like those that exist between the meshing surfaces of gear teeth in the transmission and rear axle. Thin oil without an EP additive will be squeezed out from between the gear teeth due to the Extreme Pressure and therefore won't supply proper lubrication to the gears.
 
since you were at TSC...this one..
Traveller Premium Universal Tractor Trans/Hydraulic Fluid

They sell a cheaper version in a yellow pail but the Premium is better stuff.

Like said, you can use it in all 3 compartments.
I prefer gear oil in the rear and trans, UTF in the hydraulics, on a summer machine...just my preference.
'Clings' better, less gear noise and trans gear 'spin down' times are quicker when changing gears.

A winter machine gets UTF in all 3 compartments. Gear oil is mud at zero degrees....and tractors can move in neutral then when you start them. not really dangerous unless it gets your foot...but does get your attention!
 
When Ford did the 8n the trans hydraulics and the rear end were all the same compartment. Then came the NAA and all three were separate and the dip stick only checked the hydraulic many a rear end was lost from lack of oil.
 

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