8070 hydraulic pump

I was looking at an 8070 for sale, But in the descriptions it says that the HY pump is bad. So my question is where is the hydraulic pump located on the 8070s and is it external or internal? It had Front wheel assist I don’t know if that makes any difference. Thanks in advance!

Gear pump is different on FWA.       MACK

Which pump, there are three of them.

I’m not sure which pump it is from what information I have got from the guy is that it has no lift arms The hydraulic hook ups in the back don’t work and the power takeoff is spinning all the time. I do most of my own mechanic work I have replaced them on like 560 internationalIt was also internal but you didn’t have to split it with this one being in ternal does it need to be split or is there a way to access them

Arlis chalmers wrote: I’m not sure which pump it is from what information I have got from the guy is that it has no lift arms The hydraulic hook ups in the back don’t work and the power takeoff is spinning all the time. I do most of my own mechanic work I have replaced them on like 560 internationalIt was also internal but you didn’t have to split it with this one being in ternal does it need to be split or is there a way to access them

Pumps are external

Remove the right side cab step. Swing out the batteries. Look down inside. To actually work on them, you'll need to drain down the fuel and remove the right side fuel tank.

Arlis welcome to the channel.   We are only a few miles apart.

You're going to need a gauge for this project one way or the other if you're going to try and do this yourself. Regardless of either fixing your old pump or replacing it with a new or used pump, you're going to need to see what pressure it is putting out. A simple low pressure spring on the compensator may very well fix the problem . Plus, the later tractors had a problem with brittle screws that adjusted the pressure and would break and cause low pressure. Easy fix by just swinging out the batteries.

I have all 3 pumps here .for sale for a 2wd .if u fine u need the pumps .

Gear pump and housing are diff - first thing I would do is pull the filter, check for the end cap that goes in the ends of both hyd belly filters.  Check the oil level, then put a gauge in the tee in the place to check stand by , see if there is about 400 -550 psi and if not check the low pressure stand by spring on the compensator. IF the spool and spring are ok and there is no pressure - you have a pump problem probably - if you have some pressure - adjust via allen screw or shims. Check the hp by pulling the remote - if no high pressure check the hp spring in the compensator.   A service man is necessary if no experience with a compensator system.  It is not that complicated a system but a few items control standyby and flow systems on the piston pump.  

If you want 540,you change all the pto guts. If you want the little 1000,just put the adapter on it. Why do you want to change what you have?

Then, you want the complete dual speed 540/1000 RPM PTO from a 7010 thru 7060 or 8010 thru 8050. Remove what you have and install the other.