VAC Project: Confused about hydraulic oil

This 1950 VAC has an Eagle Hitch. I have what appears to be a slightly older service manual, since it only shows the older high-pressure system. The capacities page says to refill the transmission and torque tube with either 90W or 140W depending on the prevailing temperature.

I was thinking this could be pretty heavy for the torque tube in that it functions as the reservoir for the hydraulic system. Could someone tell me what weight(s) of oil are recommended in the hydraulic system? Keep in mind I like to use the summer weights since in north Florida, it won't see much of winter temps.

Thanks as always.

Frank-in-Tallahassee
70D // 855 // VAC
[email protected]

• F-I-T's webpage.....ALWAYS under construction....

Torque Tube (without Eagle Hitch)
VA series tractors without hydraulic systems use SAE 90 oil in the torque tube

Torque Tube (with Eagle Hitch)
SAE 20W Engine oil....60 degrees and up
SAE 10W Engine oil....32 to 60
SAE 5W Engine oil.....below 32

It seems that your Service Manual decided to ignore tractors with an Eagle Hitch!

Brandon
My Industrial John Deere website
My JD model 80 website
The LaGrange Engine Club

Well, I don't have an ops manual, just the shop service manual, and I think it might be a '48, just before the Eagle hitch became standard.

I was pretty certain that the oil called out would be similar to the engine oil weight. Probably can't go wrong with that rule of thumb.

Frank