Jarrett gore 0 #1 Posted December 14, 2023 I can not get the hydraulics to work on my D 160 for nother I think it might be the pump and yes the tow valve is closed and is there and one who can help me through the rebuild prosess I had it apart once and did not notice anything wrong thats want I don't understandstand about it Share this post Link to post Share on other sites
Ed Kennell 38,146 #2 Posted December 14, 2023 to the Jarrett. I can't offer any help, but some of the hydro experts should be here soon to help you. Share this post Link to post Share on other sites
pfrederi 17,729 #3 Posted December 14, 2023 Welcome. When you say hydraulics don't work do you mean the lift cylinders or that the tractor will not move at all. Download this manual and helpful repair guide. https://www.wheelhorseforum.com/files/file/24-transmission-hydro-sundstrand-sm-492-4206pdf/ 1 Share this post Link to post Share on other sites
pfrederi 17,729 #4 Posted December 14, 2023 Please see my reply to your first post 1 Share this post Link to post Share on other sites
Jarrett gore 0 #5 Posted December 14, 2023 1 hour ago, pfrederi said: Nothing works no movement and no mid lift or rear 3 point Share this post Link to post Share on other sites
pfrederi 17,729 #6 Posted December 14, 2023 Assume you checked the fluid level the tranny.. Ok look at the connector between the engine and the hydro pump unit are both sides spinning when you put a load on it (driving it or trying raise lower a cylinder) 1 Share this post Link to post Share on other sites
Jarrett gore 0 #7 Posted December 14, 2023 I used you link to see the repair but that does not look like mine. Mine looks like a this it does not have that extra thing to the side Share this post Link to post Share on other sites
pfrederi 17,729 #8 Posted December 15, 2023 The link is for a Sunstrand used in the Charger electro and early C series. The internals are the same just some variances in the external linkages. The Sunstand manual calls out the differences between a standard (Early C series) and separated D series) the manual has a good diagnostic guide. With tow valve closed can you push the tractor? 2 Share this post Link to post Share on other sites
daveoman1966 3,751 #9 Posted December 15, 2023 (edited) There are TWO types of Sundstrand Hydros. 1) Sundstrand Hydrogear (models 90-2046 & 90-2062) and 2) Sundstrand piston-to-piston (*models 90-1136, 90-1137, 90-1140). Hydrogears were used on older models like Charger, Bronco 14, or the GT-14. Later models starting is about 1973 are for 'B' and 'C' series Autos i.e., B-100, C-120, C-160 etc. In either case, I have prepared a FREE download repair manual with photos and narrative of how to do the rebuild. It is NOT difficult to do. Rebuild files are here too... SUNDSTRAND PUMP & MOTOR Parts list.pdfSUNDSTRAND HYDROGEAR refurb.pdf Edited December 15, 2023 by daveoman1966 files 1 1 Share this post Link to post Share on other sites
oliver2-44 9,739 #10 Posted December 15, 2023 In your other post you mentioned you previously had it apart. What was it doing that you took it apart? Share this post Link to post Share on other sites
