Eaton 1100/700 swap question

[Jerry77 1,218]

I am going to swap out my eaton 700 with an 1100.  I have read the posts about this and I have a question...I am not going to use the hydraulic lift portion - if fluid only flows thru that line when called for by the lever, then why not just cap off the two holes that the hoses occupy?  If I use a hose to connect the two outlets then what is the difference?  Hoping some of you guys who know how the pumps work can clue me in on this. Appreciate the help - I don't have much knowledge of the hydraulic system...

[woodchuckfarmer 333]

I did this change. I installed an oil filter and ran the lines to it then back to the trans.    Wayne

[Jerry77 1,218]

I don't have the unit yet - it will be the complete transaxle, pump and axles and hubs - should have the filter on it - just missing the hoses and lever for the hydraulic lift--does that sound right? I probably should have waited till I get the unit before asking questions, just trying to get ahead of the curve....Jerry

[JAinVA 4,629]

I don't have much experience with the WH hydraulics but if it works the same way as most pump/ valve combos then don't cap the pump fittings.The pump in most applications supplies fluid to the valve in one line and receives the return  flow in the other.When the valve is in neutral then the fluid still flows in this pattern. When either lift or lower function is selected fluid is diverted to operate the cylinder and the fluid is returned by ports in the valve to the resevoir.If the lift or lower function is over loaded then the pump relief valve goes off with the familiar squealing sound.I would suspect that if the pump is capped then the relief valve would constantly be going off.

When you get the valve blow air into either port and see  if it comes out the other port with the control function in neutral.If it does then do not cap the pump ports but connect them with a hose. Luck,JAinVA

Edited September 11, 2016 by JAinVA

[Jerry77 1,218]

Thanks JAinVA....that was what I was wanting to know  - will have a bypass hose made for it then....

[bmsgaffer 2,046]

Don't just bypass it, make sure to put the filter back in that return line . 

[JAinVA 4,629]

Extra filters are always good but I question the the need for a filter in the bypass.Most of the wear is in the gear and pump systems of the transmission.If you have the ability to install a filter in the return line so much the better but in my opinion the stock filter arrangement will supply suffient protection.If you can't put a filter in the bypass I wouldn't sweat it.JMHO,JAinVA

[bmsgaffer 2,046]

4 hours ago, JAinVA said:

Extra filters are always good but I question the the need for a filter in the bypass.Most of the wear is in the gear and pump systems of the transmission.If you have the ability to install a filter in the return line so much the better but in my opinion the stock filter arrangement will supply suffient protection.If you can't put a filter in the bypass I wouldn't sweat it.JMHO,JAinVA

 

I should have clarified. The stock filter IS in the return line from the lift system on an eaton 1100, that is all I was referring to. So it would have to be attached to the "bypass line" as it were. Not adding an extra one. 

 

On this system you have to have the lift accessory circuit connected to charge the drive system (and to not make the charge pump self destruct), but you can leave out the lift valve and cylinder. Just go straight from charge pump to filter back to hydrostat port. 

 

Handy dandy diagram for eaton 1100:

Edited September 11, 2016 by bmsgaffer

[Jerry77 1,218]

Thanks to all of you guys...I have a good idea of what to do now....I will use the filter and have a bypass hose for the lift valve made up...