Fx 335 Injection pump help

[TDP]

Fluid is full. It is right kind. Well I say its right- its same fluid that was in it when I bought it. It has a little over 300hrs on it. And this noise recently started. I just bought some JD303 fluid from Atwoods but Im not sure its the right one. It doesn't say trans/hydraulic fluid on bucket. I wonder if there are two kinds of JD303 oil. Im going to change it soon but before I do I want to make sure I have right fluid.

 

[clemsonfor]

JD303 is JD303 fluid. Thats the spec that it is.

Now some will be a better quality than others but it will all meet that spec. kind of like motor oil. Mobil 1 meets the same specs as the no name off the shelf brand but Mobil 1 is a better oil.

these old tractors should run fine on any quality of JD303