MF202 Power steering not working when hot.

[Raymond Perry]

When I first start the tractor the power steering works fine but once it gets hot it doesn't. any advice?

 

[Stan Coryell]

New problem or new tractor?

 

[Caryc]

OK, let's get the obvious question over with. Is the pump reservoir full? Are there any visible leaks?

 

[Raymond Perry]

Yes the reservoir is full. I had to replace one
of the slave cylinders because it was leaking
badly when I got the tractor. I don't see any
more leaks now. I'm leaning towards the pump
may be weak or wrong type of fluid. It calls
for Type A which you can't get anymore.

 

[Caryc]

(quoted from post at 06:47:46 10/09/23) Yes the reservoir is full. I had to replace one
of the slave cylinders because it was leaking
badly when I got the tractor. I don't see any
more leaks now. I'm leaning towards the pump
may be weak or wrong type of fluid. It calls
for Type A which you can't get anymore.

I use ProLine Automatic Transmission Fluid. It's for vehicles that require Dexron III & Mercon Brands. Been using this for many years.

 

[Stan Coryell]

What does the fluid look like? Is it Red (ATF)? Does it smell burnt? What does the filter look like? Does the pump make noise? You could put a pressure gauge in the pressure line, it should be 800PSI. Flushing and replacing the fluid may help. Likely the pump is tired. I use ISO 32 hydraulic oil in mine.