Babbo 1 #1 Posted May 27 I have a leak in the aux cylinder and hoses after the charge pump. The cylinder is used for power steering and has a simple control valve and double acting cylinder to turn the front wheels. I have the original manual steering setup I can drop in very easily. My question is, what is the best way to loop-back the aux ports to essentially delete the aux cylinder and valve? My initial thought was to plug the control valve working ports so the open center valve allows fluid to return to the Eaton 11 but that's leaking too. See "X"s in the figure below. Essentially, I want to keep the charge pump but don't want to use it for auxillary work until I fix all the leaks. Simply plugging the 2 ports doesn't seem right but looping a hose from supply to return seems like ta logical approach (red jumper hose in figure). Any ideas? Share this post Link to post Share on other sites
JoeM 9,985 #2 Posted May 27 1 hour ago, Babbo said: looping a hose from supply to return seems like ta logical approach (red jumper hose in figure). Yep you sure can, I have one FEL machine setup that way. I eliminated the lift circuit. 1 Share this post Link to post Share on other sites
Babbo 1 #3 Posted May 27 Excellent, thank you Joe. It looks like output port of the charge pump is -6 ORB. The other end of the hose would need to connect to my filter setup. Something like this.... 1 Share this post Link to post Share on other sites
Gibbs 1 #4 Posted Tuesday at 12:54 PM (edited) On 5/27/2026 at 10:54 AM, Babbo said: Excellent, thank you Joe. It looks like output port of the charge pump is -6 ORB. The other end of the hose would need to connect to my filter setup. Something like this.... . . I have been looking at a way to bypass the power steering valve for another reason. https://www.wheelhorseforum.com/topic/72209-522xi-hydro-problems/ Starting at post #22 From what I have read it is not a good idea to do the bypass at the hydro pump as shown in your photo. It should be done at other end of the hydraulic oil lines near the hydraulic lift control and power steering valve. From What I have read the lines from the hydro pump to the front of the tractor help cool the hydro oil. Edited Tuesday at 12:56 PM by Gibbs Share this post Link to post Share on other sites
Handy Don 16,698 #5 Posted Thursday at 03:13 PM On 6/2/2026 at 8:54 AM, Gibbs said: From what I have read it is not a good idea to do the bypass at the hydro pump as shown in your photo. It should be done at other end of the hydraulic oil lines near the hydraulic lift control and power steering valve. From What I have read the lines from the hydro pump to the front of the tractor help cool the hydro oil. Excellent point. The Eaton 11 relies on cooling from contact with the metal lines, the oil filter, and the transaxle case so making the bypass at the “implement” end makes good sense. 1 Share this post Link to post Share on other sites
Babbo 1 #6 Posted 2 hours ago You are correct. I plan to use some finned steel tubing as a bypass connection. One quick question, I've been filling this system from the breather vent. Is there a better way to fill this? The hydrostatic pump is an Eaton 11 and the transaxle is a Peerless 2500. Thank you. Share this post Link to post Share on other sites
Handy Don 16,698 #7 Posted 1 hour ago 46 minutes ago, Babbo said: You are correct. I plan to use some finned steel tubing as a bypass connection. One quick question, I've been filling this system from the breather vent. Is there a better way to fill this? The hydrostatic pump is an Eaton 11 and the transaxle is a Peerless 2500. Thank you. Frankly, undersizing the provision for cooling could backfire. Hydro pumps generate quite a bit of heat when under load and the fluid typically expands noticeably. In the first post’s diagram, you showed that the filter and cooler remained in the charge loop but I don’t see a reservoir. What sort of reservoir and vent does this system have? Share this post Link to post Share on other sites
Babbo 1 #8 Posted 1 hour ago From my limited understanding and from what I've read, the Peerless transaxle is the working end AND reservoir for this system. The manual I have says to fill through the vent hole until oil seeps out of the inspection hole, about half way up the back end of the transaxle housing. I question this because of how much fluid came out vs how much went in. About 4qts came out but only about 2 went in. It could need some run time to purge the air out of the system. Share this post Link to post Share on other sites
Handy Don 16,698 #9 Posted 1 hour ago (edited) 15 minutes ago, Babbo said: From my limited understanding and from what I've read, the Peerless transaxle is the working end AND reservoir for this system. The manual I have says to fill through the vent hole until oil seeps out of the inspection hole, about half way up the back end of the transaxle housing. I question this because of how much fluid came out vs how much went in. About 4qts came out but only about 2 went in. It could need some run time to purge the air out of the system. If you are keeping those components in the loop and adding some cooling in place of the valve plumbing and valve body, you probably will be good. The Eaton/Unidrive WHs rely on the transaxle as the reservoir and their vent is through a hollow handle in the dipstick. I think you are completely correct that there is an air pocket preventing full filling. I’d close the inspection port, run it through some gentle motion for a minute, and then retry. Edited 1 hour ago by Handy Don Share this post Link to post Share on other sites
