dobeleo 7 #1 Posted February 5, 2011 I have been rebuilding a 86 312-A since last year have a pump question, here is a little background, my brother bought it in 86 for $3500 ran it for 5 years, then he said it would only creep forward, so it sat since 91. In 2000 I trailored it and stored it under my deck until last February. One day my son and I were watching the Daytona 500 and we were talking about the tractor, I think alcohol was involved and said lets take it apart and bring it in the basement. I have a walk-out basement. I took the eaton pump off the rear end, split the housing, drained the oil, the motor and pump side looked good, just dirty oil, there were 2 check valves, one slide in and out easily, the other was a little more stubborn but I left it alone and put it back together. Here is a pic of the assembly: Its back on the tractor now and full of new synthetic oil. Here is my question: when i turn the fan with the shifter in reverse the wheels immediately turn. When I move the shifter to the forward position and rotate the fan, the axle barely rotates. I am hoping I just need the fan / drive pulley to turn alot faster and create more flow and pressure to make things work right. All your comments are appreciated. Here is a pic of the tractor Oh, by the way, I am putting it back together in the garage. Thanks all for your comments! Dan Shorewood, Illinois Share this post Link to post Share on other sites
B-8074 19 #2 Posted February 5, 2011 It sounds like you just need some speed on the drive pully. At least that's what I think . Share this post Link to post Share on other sites
kpinnc 12,457 #3 Posted February 7, 2011 Did you split the case of the pump itself? If so, putting it back together 180 degrees out will make the driven half of the pump run backwards. I have seen a few pumps that respond quicker in forward than reverse- not that it is an indication of a fault. In other words, the orientation of the "driven" or "motor" half of the pump is what determines whether the output shaft rotates clockwise (CW stamped on the pump), or counter-clockwise (CCW). This is the only difference between a CW and CCW pump on both the 700 and 1100 series. Of course, rotating the input pulley counter-clockwise will tell you right away if that is what is wrong. If you do so, and moving the lever forward produces forward rotation of the axles, the driven half of the pump is oriented correctly. The true test of the pump unfortunately will be after it is warmed up after about 30-45 minutes of loaded use. If it becomes weaker, then it is on it's way out. But you can't tell for sure until you have it all back together. Good luck! Share this post Link to post Share on other sites
dobeleo 7 #4 Posted February 7, 2011 Thanks for your comment, I will check the rotation today! I was afraid that I will have to put the tractor completely together to test the power of the drive system. At least all the bolts will be new and it will come apart quick! Dan Shorewood, IL Share this post Link to post Share on other sites
