jtmoyer 1 #1 Posted March 10, 2009 what was the first year that wheel horse put in a hydro? thanks for the info. Share this post Link to post Share on other sites
CasualObserver 3,411 #2 Posted March 10, 2009 1965, it was the model 875 Wheel-a-matic. It's not a true Hydrostatic though, it's a hydraulic drive. Share this post Link to post Share on other sites
Brrly1 1,146 #3 Posted March 10, 2009 1965 - 875 was one of the first ones along with a few others just bigger hp like the 1075. Burly Share this post Link to post Share on other sites
Rollerman 290 #4 Posted March 10, 2009 1965, it was the model 875 Wheel-a-matic. It's not a true Hydrostatic though, it's a hydraulic drive. You sure about that Jason? 1965 Horse introduced the 875 & 1075 tractors that used the Sundstrand hydrostatic drive. Colt in 64 came out with there true hydraulic drive. The two drive types had the same end result..."infinatley variable speed", but used differants means to make it. Share this post Link to post Share on other sites
CasualObserver 3,411 #5 Posted March 10, 2009 Pretty sure, but I could be mistaken. As far as I understand it, Hydrostatic means fluid at rest, Hydraulic means fluid in motion. Isn't the drive driven by the hydraulic pump? And whoops, yes... I left off the larger engined 1075. :thumbs: Share this post Link to post Share on other sites
Rollerman 290 #6 Posted March 10, 2009 My understanding of hydraulic & hydrostatic (limited too). In a hydraulic system regardless if it's a log splitter or Case GT the pump is always pumping fluid...the control valve mounted remotety from the pump tells the drive motor or cylinder what direction to move....if no direction is selected the fluid is returned to the resevoir. In a Sundstrand or Eaton hydrostaic drive system it is very similar that fluid is being pushed under pressure to move a drive motor or cylinder. Except the controls are internal to the pump controlled by a swash plate. With the direction control on a Horse in neutral & the swash plate in a neutral position the pump is not pumping either...other than the charge pump the provides pressure to lift systems on some models. A long read...but a better understanding can be had here. http://www.tpub.com/basae/143.htm I'm sure my explanation lacks some details too. :thumbs: Share this post Link to post Share on other sites
CasualObserver 3,411 #7 Posted March 10, 2009 Thanks Stephen, learned something today. Share this post Link to post Share on other sites
Teddy da Bear 11 #8 Posted March 10, 2009 I told Stephen he had infinite wisdom the other day..... He did not believe me.......but this explanation sure sounds like he does.... :thumbs: Share this post Link to post Share on other sites
kpinnc 14,621 #9 Posted March 10, 2009 I always thought of hydrostatic as the driving and driven pump/ motor being contained in the same assembly. And Case uses hydraulic drive- The pump is separate from the motor, connected by hydraulic lines. Stephen's explanation makes good sense though. I just always use the simplest terms I can for my little mind... Kevin Share this post Link to post Share on other sites
TT-(Moderator) 1,162 #10 Posted March 10, 2009 I always thought of hydrostatic as the driving and driven pump/ motor being contained in the same assembly. That's almost correct..... until you get to the D-160/180/200 models. :thumbs: Share this post Link to post Share on other sites
kpinnc 14,621 #11 Posted March 10, 2009 That's almost correct..... until you get to the D-160/180/200 models. Dangit! The story of my life- ALMOST! Good point TT. I sit corrected. Kevin Share this post Link to post Share on other sites
illinilefttackle 399 #12 Posted March 10, 2009 :whistle: I understand-I think-So if torque is constant-then the major reason you should run a Hydro at least 3/4 throttle is........cooling? -AL Share this post Link to post Share on other sites
boovuc 1,090 #13 Posted March 11, 2009 Stephen, I got 7 paragraghs into the linked story on hydro's and my eyes started to bleed. I have an automatic C121 and a gear drive C175 and I pray my automatic, with proper maintenance, doesn't fubar on me. Otherwise, I'll be keeping a small business owner going through these tough economic times. Boovuc :thumbs: Share this post Link to post Share on other sites
