B7100 HST Hydraulic Fluid Loss

[NateGreenValleyFarm]

I am dealing with a total fluid loss during operation of the Hydraulic system. I noticed directly under the pump fluid dumping out. I am wondering how to remove the pump or gain vision on the area to inspect. Ideas?

 

[North Idaho Wolfman]

Under which pump?
HST or main hydraulic pump?

 

[NateGreenValleyFarm]

The fluid found its way out under the frame approximately under the seat of the tractor. I am assuming as fly by night mechanic that it is at the HST not the pump as the pump is located at the engine?!?

 

[Russell King]

It would probably be best if you were to post a picture.

You may have to get over 5 posts before you can attach a photo.

If you want to post a video you have to post it somewhere else (like YouTube) and put a link here.

 

[North Idaho Wolfman]

The fluid found its way out under the frame approximately under the seat of the tractor. I am assuming as fly by night mechanic that it is at the HST not the pump as the pump is located at the engine?!?

It could still be the hydraulic system and not the HST as the hydraulic pump does feed the controls back there and the three point cylinder.

 

[Russell King]

I suggest that it could also be the transmission vent being clogged and pressure buildup causing it to leak.

I think you should clean it well and the see if you can see more exactly where the leak is starting from.

 

[torch]

I am dealing with a total fluid loss during operation of the Hydraulic system. I noticed directly under the pump fluid dumping out. I am wondering how to remove the pump or gain vision on the area to inspect. Ideas?

What do you mean by "during operation of the hydraulic system"? Do you mean it only leaks when you actuate the 3 point hitch lift control (or other hydraulic attachment)? Or when you try to drive forward/backward?

 

[NateGreenValleyFarm]

What do you mean by "during operation of the hydraulic system"? Do you mean it only leaks when you actuate the 3 point hitch lift control (or other hydraulic attachment)? Or when you try to drive forward/backward?

I was mowing grass and the tractor stopped moving. Not running. Just moving. I looked down and under the tractor. On top of the mower deck. Was filled with hydro oil.
I stopped the tractor and could see the dripping coming down from the point of the tractor that separates next to the hydro oil filter.
now I have split the tractor and can see no obvious signs of damage or other. The hose to the rear that follows to the pump body is fine. Only thing I can remotely tell is the gasket on the rear axel to the hydro gear box may need to be replaced. But was intact. I opened the hydro gear box to inspect and all gaskets look good. I don’t want to put it all back to do this again. Any thoughts?

 

[olddude]

I was mowing grass and the tractor stopped moving. Not running. Just moving. I looked down and under the tractor. On top of the mower deck. Was filled with hydro oil.
I stopped the tractor and could see the dripping coming down from the point of the tractor that separates next to the hydro oil filter.
now I have split the tractor and can see no obvious signs of damage or other. The hose to the rear that follows to the pump body is fine. Only thing I can remotely tell is the gasket on the rear axel to the hydro gear box may need to be replaced. But was intact. I opened the hydro gear box to inspect and all gaskets look good. I don’t want to put it all back to do this again. Any thoughts?

Are you sure it's not leaking from one of the oil lines that hook into the HST filter bracket. I have a L3301 that is leaking from all three of the ports where the lines connect, 2 on the filter housing and one where it goes into the transmission. It started leaking for no reason while I was bush hogging the other day. I can't see any damage to any of the lines but it is strange it would just start leaking there for no reason.

 

[North Idaho Wolfman]

Are you sure it's not leaking from one of the oil lines that hook into the HST filter bracket. I have a L3301 that is leaking from all three of the ports where the lines connect, 2 on the filter housing and one where it goes into the transmission. It started leaking for no reason while I was bush hogging the other day. I can't see any damage to any of the lines but it is strange it would just start leaking there for no reason.

The B7100's have no such configuration.

 

[North Idaho Wolfman]

I was mowing grass and the tractor stopped moving. Not running. Just moving. I looked down and under the tractor. On top of the mower deck. Was filled with hydro oil.
I stopped the tractor and could see the dripping coming down from the point of the tractor that separates next to the hydro oil filter.
now I have split the tractor and can see no obvious signs of damage or other. The hose to the rear that follows to the pump body is fine. Only thing I can remotely tell is the gasket on the rear axel to the hydro gear box may need to be replaced. But was intact. I opened the hydro gear box to inspect and all gaskets look good. I don’t want to put it all back to do this again. Any thoughts?

Have you cut open the filter?
have you inspected the pressure relief valves?