[Farmall] International 460 Utility

[Mike Sloane]

In the case of the Ford N tractors, 90W oil is what they are supposed to 
have in the system. I suspect that 1. Ford never expected anyone to be 
using the three point hitch in sub-freezing weather and 2. the system is 
  based on 1930s technology, when high pressure hydraulics and light 
hydraulic oils were not in common use, certainly not for transmissions 
and final drives. This was true of IH tractors as well - the early "Lift 
All" systems in the H and M used 30W engine oil for hydraulic fluid, 
which was better but still pretty stiff in cold weather.

Mike

cvill wrote:
> Could we ask what oil was used for the refill.  Incorrect oil such as 
> 90W gear oil could cause this same problem.  Case in point:  I have an 
> 8N ford with 90W in the gear cases.   The 3 pt. hitch will do just as 
> you describe.  The oil just gets too thick to pump.
> 
> Charlie V.
>