The Tuul Crib 7,340 #1 Posted January 23, 2020 (edited) Im about to dive into this sunstrand hydro pump and replace all seals and o rings . This will be a first for me and l do have some manuals to help me thru. I am looking for a little support in this endeavor. The parking brake pawl will definitely need A little repair which I can take care of. The inside of the transmission seems to be in great shape the gears are in excellent shape as well as the axles. It will need new axle seals. Its a 90- 2046 Edited January 23, 2020 by The Tool Crib 2 1 Share this post Link to post Share on other sites
The Tuul Crib 7,340 #2 Posted January 23, 2020 The condition of the transmission is unknown. I picked up two charger 10s And both were basically rollers. The one I'm currently working on in the thread the fluid inside was bright pink-ish or red. The inside of it looked to be in good condition. Of course the break pawl Will need repair. So I figured that from that break pawl issue that was probably shards of metal in the system. Share this post Link to post Share on other sites
The Tuul Crib 7,340 #3 Posted January 23, 2020 1 minute ago, 953 nut said: @daveoman1966 has lots of great posts on Sundstrands. Here are your axle seals. https://www.ebay.com/itm/TORO-Wheelhorse-Axle-Seals-6449-Set-of-2pc-FREE-SHIPPING/142042768245?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160811114145%26meid%3D44d045110a5c434d9af2b89eddb98bcf%26pid%3D100667%26rk%3D4%26rkt%3D7%26mehot%3Dpp%26sd%3D181442383639%26itm%3D142042768245%26pmt%3D1%26noa%3D0%26pg%3D2334524&_trksid=p2334524.c100667.m2042 As I was taking this apart I did notice the seals are a lot deeper than normal when I tried to pull them out I was expecting them to be shallow. Thanks for the info on the seals!! 1 1 Share this post Link to post Share on other sites
ZXT 2,401 #4 Posted January 23, 2020 Following! I really need to do this to the hydro in my GT-14. Leaks like a sieve. 1 Share this post Link to post Share on other sites
Stepney 2,354 #5 Posted January 23, 2020 This will probably be the motivation I need to sort out my Charger 9 90-2046 hydro. Been meaning to do one for years but just .. haven't. Good luck! Share this post Link to post Share on other sites
The Tuul Crib 7,340 #6 Posted January 23, 2020 8 hours ago, Achto said: What's your plans on the parking brake? Are you going to weld it up & then grind it back to shape? That is my plan . We have a wire welder at work.l might cut a small piece of metal and weld it in. 1 Share this post Link to post Share on other sites
The Tuul Crib 7,340 #7 Posted January 23, 2020 11 hours ago, pfrederi said: Did it run OK previously? You should check the acceleration valves. Just got a very unpleasant surprise when i opened up my GT-14 hydro gear. When you say check the acceleration valves what am I looking for that could be a surprise? Share this post Link to post Share on other sites
The Tuul Crib 7,340 #8 Posted January 23, 2020 (edited) Nice job on the brake pawl! I am trying to gather as much info as l can before l get into this ! So correct me if I'm wrong it looks like there are 5 O rings just on this alone? This helps Thanx ! Edited January 23, 2020 by The Tool Crib Share this post Link to post Share on other sites
The Tuul Crib 7,340 #9 Posted January 23, 2020 26 minutes ago, pfrederi said: This is what you may find in an acceleration valve. The mangled thing is all that is left of a spring like the big one in picture another spring and the center guide. Also notice the damage they did to the end of the sleeve. the cone valve is stick in there because of that damage. Yikes! Share this post Link to post Share on other sites
Herder 2,355 #10 Posted January 23, 2020 I have been working on the hydro unit for my GT-14 and the thread is called GT-14 hydro gear swop, many have helped by posting links and photos on to the thread. Most or all the info you need is posted. The pump, hydro gear and final drive. Check it out. 1 1 Share this post Link to post Share on other sites
The Tuul Crib 7,340 #11 Posted January 25, 2020 So today I was able to find a socket big enough to take the cap off of the Excelerator valves the first one was perfect the second one yikes! Not so perfect. I know that now I can buy these springs but what about the rest of the parts are they easily obtainable? This would be the forward valve. Share this post Link to post Share on other sites
The Tuul Crib 7,340 #12 Posted January 25, 2020 (edited) 5 minutes ago, 953 nut said: Used parts may be able to be found, I had to use a roofing nail as a replacement for the one with the head broken off. The valve at the front of the Hydro Gear is the Reverse valve and the one at the rear is the Forward valve. That is why I ended up having to replace the whole Hydro Gear and swap out the output gear eight years ago on my GT-14. None of the valves would come out as a result of the pounding they had been subjected to. So the question I have is are both valves the same. I have another donor transmission that I can use parts off of for now. According to this chart they should be the same Edited January 25, 2020 by The Tool Crib Share this post Link to post Share on other sites
The Tuul Crib 7,340 #13 Posted January 25, 2020 4 minutes ago, 953 nut said: The forward valve has larger fluid passages so if it were used in Reverse you better hang on tight when you back up. Lol!! Share this post Link to post Share on other sites
