rbthefirst 0 #1 Posted June 17, 2018 (edited) I just bought a 1975 Wheel Horse C120. It needs to have the hydro transmission rebuilt. Where can I find a rebuild kit or parts for it? Any help would be greatly appreciated! Thank you. Here is a picture of a transmission just like mine. Edited June 17, 2018 by rbthefirst Add picture Share this post Link to post Share on other sites
pfrederi 17,893 #2 Posted June 17, 2018 (edited) There isn't really any kit beyond a package of seals. Some parts are available from LJ Fluid Power. The picture is of a piston to piston check here for the service manual. Here are some pictures of a D series Pump repair (very similar to your pump) This is not a Satruday afternoon in the driveway project. What is wrong with your unit??? Edited June 17, 2018 by pfrederi 2 Share this post Link to post Share on other sites
daveoman1966 3,762 #3 Posted June 17, 2018 Your sundstrand unit is 90-1136 and here is a rebuild kit source. Part # 99890 seal kit $92.00 O-rings, gaskets, seals Can ship from Nova in 2-3 days. Gordy Pearson Nova Hydraulics 6212 Parliament Drive Indianapolis, IN 46220 Ph: 317.322.0242 Fax: 317.322.0247 Download them repair manual and follow the step-by-step procedures. This is not a difficult task, but takes time to do it right. You MUST rebuild the hyd pump and motor assy's. If you'd give me your email address, I can forward specific instructions of what to do. I have rebuilt sevferal of these units over the past 20 yeaars or so. I am: daveoman@windstream.net 2 4 Share this post Link to post Share on other sites
daveoman1966 3,762 #4 Posted June 17, 2018 Here are two Excel ss detailing the parts and schematics. You may find them helpful. YOU can do this... just be meticulous and keep work area clean. Have a coffee can of kerosene to rinse parts as you progress thru the process of re-facing the brass and other steel internal parts. Once again....what is your email address? MOTOR 90-1136, 37, 40.xlsx PUMP 90-1136, 37, 40.xlsx 3 Share this post Link to post Share on other sites
KC9KAS 4,741 #5 Posted June 17, 2018 @rbthefirst to Share this post Link to post Share on other sites
