"Manic-Mechanic" 1,195 #1 Posted April 4, 2022 (edited) I have been looking at the Sundstrand Manual Pages 60-62 for Parts Numbers and the manual shows a C, B Series Pump. Now as far as I know that would be model 90-1136 So trying to compile a list has become a nightmare, model 90-1137 (specific) The B, C, D Cross Reference Chart has a whole different set of numbers specifically for the 18 Auto/D Series MORE THAN LIKELLY "OVER-THINKING IT" COMPARE SUNDSTRAND B & C& D.xlsx Sunstrand Hydro (part 4).pdf Book1.xlsx Edited April 4, 2022 by "Manic-Mechanic" Share this post Link to post Share on other sites
stevasaurus 22,860 #2 Posted April 4, 2022 @gwest_ca Only guy I know that may be able to decipher what are are running up against. 1 Share this post Link to post Share on other sites
"Manic-Mechanic" 1,195 #3 Posted April 4, 2022 (edited) I have been searching for grins & giggles and the prices on functioning parts are insane! I am about ready to dismantle the Tractor and sell off the parts! (just kidding) (Sundstrand 90 Series Cylinder Assemblies near 1,000.00) Too think all these years of parts search and refurbishment a functioning Loaded18 Auto is priceless! Edited April 4, 2022 by "Manic-Mechanic" Share this post Link to post Share on other sites
pfrederi 17,866 #4 Posted April 5, 2022 Okay don't over think this. First off unless you are a millionaire you are not going to be replacing piston blocks slipper and valve plates. if they are scratched you resurface them if they are too far gone you buy another used pump and try to resurface that..Very few if any of the needle bearings in the pump/motor will be bad and if so the are readily available and the same between the one piece and separated piston to pistons. The one thing you may have to get form LJ is the retaining clip in the motor which has a nasty tendency to break wen you dissemble the motor. What parts do you need. There the one piece ( C series) and separated system (D series) are virtually identical parts wise internally. 1 1 Share this post Link to post Share on other sites
"Manic-Mechanic" 1,195 #5 Posted April 5, 2022 (edited) Even with the splined shafts being different from the 36 to the 37? So the only differences are external, like the brake drum fitment on the motor and the spline end VS the pulley stub on the pump? So, a B,C Pump could exchange shafts with D. Almost looks as though the inner assemblies could be removed, stacked, and change the shaft, re-assemble.... I found a French Co that has been taking over many hydro products, maybe something to it? HYDRO LEDUC N.A., Inc. Grand Parkway Industrial Park – 23549 Clay Road – KATY, TX 77493 – USA | Tel. +1 281 679 9654 Michael W. BYRD | N.A. Sales Manager | Mobile : 610-509-4666 | email : us_sales@hydroleduc.com Edited April 5, 2022 by "Manic-Mechanic" 1 Share this post Link to post Share on other sites
pfrederi 17,866 #6 Posted April 5, 2022 The pump in your picture is not for a D series. Motion control shaft is on the wrong side for a D. However they are reversible using the same parts 1 Share this post Link to post Share on other sites
