JD 300 Loader forward does not work rev and all other hyd work great

[monta]

I have changed oil , filters but no forward motion. it stared slowly and got worst over a short period of time. Help Please a old NAM vet.

 

[Tx Jim]

Did you check/clean sump screen(parts key #30)?

 

[monta]

Did you check/clean sump screen(parts key #30)?

I found the screen and it was clean . what next ??? thanks

 

[monta]

I found the screen and it was clean . what next ??? thanks

Is there any thing that can hang up in the forward/rev valve?

 

[Gale Hawkins]

Someone had a good write up with photos of replacing the O-ring in the forward clutch last year I think.

Our 310 JD backhoe is fine when it cold but after working it for a while getting the forward clutch pack does not want to lock up well especially in high range but after I changed out the hydraulic fluid three times (due to blown hoses in part) and the filters twice it got better. When I first got it there was a lot of water in the fluid I had to back it up to the house once because it would not pull in low gear but now even hot it works well even pushing forward in low range in gears 1-4. If I am traveling a long distance on the road I will run in 6th or 7th if the fluid gets too warm to keep pulling.


In one case I read about here it was the worn/broken pin in the shifting linkage that was a simple fix.

 

[Tx Jim]

Next thing to check is the reverser control linkage as it has a history of a pin breaking on RH side at control valve. If linkage is intact then check trans pressure which should be in the 155-175 range

 

[Tx Jim]

monta
I copied and pasted these instruction from another tractor site I frequent.

 

[Tx Jim]

Here's some more info.