allis chalmers

I have no idea. I have a little B without hydraulics, and use gear lube. With hydraulics though, bad plan.

Try down at the AC board where its a little more serious.

Mark
 
I don't have my manual handy, but I know I used straight 20 weight non detergent oil in my hydraulics on my WD. The manual makes a few recommendations depending on temperature, I believe.
 
In the hyd I use modern hyd fluid. AC 821. JD 303
etc. And modern 80-85-90W in the trans and rear
plus the final drives. One reason don't want to get
old non det oil in the hyd of new tractors. When
use the WD45 on cylinders. Plus it will love you
for putting good new oil in it. Also use 15 X 40 in
the engine. We just use one oil in everything,
except newer cars and trucks. 5 X 20 in them. Vic
 

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