Jinma 285 backhoe troubleshooting

[chris85]

I haven't used my backhoe since last summer, connected it up and it's not moving. I've got flow into the auxiliary pump but when the RPMs are up it comes out fast but sputtering like air is getting in. I've checked the tank filter the gasket seems good, I see no cracks or obvious signs that the hose is damaged. Frustrated.
Could it be a bad pump?

Thanks for any suggestions

 

[piper184]

Sounds like it is sucking air somewhere, you just have to track it down
On mine it works best if the oil level is higher than the indicator on the dipstick. But that causes venting problems.
Where are you seeing oil coming out fast but sputtering? In the tank or did you remove a hose on the pressure side somewhere?
If you watch the oil flow through the filler neck, are you seeing bubbles?