TimH 105 #1 Posted May 14, 2016 I have a 86 312-A With a auto Trans. I am changing all the fluid and noticed the place were you top off the trans Fluid that the fluid is nasty. Its says in the owners man. not to change the fluid unless there is a leak. So my ? is should I change it . If so were is the drain plug ? Thanks Share this post Link to post Share on other sites
TimH 105 #2 Posted May 14, 2016 I found Hose leaking at the res. tank for the trans. Cooling fins plugging. I used a trans. vacuum pump and sucked some of the trans fluid. out About a 1/2 a pint. It was dirty But not as dirty as holding tank. Any suggestion if the trans needs drained all the way. ? I sprays down the trans to loosen up dirt for cleaning tomorrow. Share this post Link to post Share on other sites
Aldon 4,827 #3 Posted May 14, 2016 I myself would drain and change the fluid entirely and fix the hose. Any foreign material can be hazardous to them. I'm sure someone will chime in on where the drain is on this model. I am unfamiliar with this hydro specifically. 1 Share this post Link to post Share on other sites
TimH 105 #4 Posted May 15, 2016 After a little time looking. There is not a way to drain the trans. Just glad I put a cork in hole before messing or cleaning filler port. I will just have to fill the trans and use it foe a while Then pump it out again. One thing I am glad that I changed the filler hose. Would of been a mess if it blew all the way. Share this post Link to post Share on other sites
Blue Delta 35 #5 Posted May 15, 2016 Tim, You have a Eaton 700 Transmission, there should be a drain plug on the bottom of the casing (RH side if memory serves me correct) you will be looking for an allen head. Service intervals on the transmissions are 100 hrs. 1 year deal. The newer machines went away from having the hydro overflow reservoir, filling takes place only through the dipstick. 3 Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,107 #6 Posted May 15, 2016 The fluid for the hydro and the gearbox lube is separate when the 700 Eaton is used. The plug on the bottom of the case drains the gearbox only. Garry 1 Share this post Link to post Share on other sites
Blue Delta 35 #7 Posted May 15, 2016 1 hour ago, gwest_ca said: The fluid for the hydro and the gearbox lube is separate when the 700 Eaton is used. The plug on the bottom of the case drains the gearbox only. Garry Yep, Gosh having done some reading the Eaton 700 is different to the 1100! TimH, Garry's linked chart has the correct oil grade that you will need when you change the oil in the pump. Garry is right on the money with the separate pump/gearbox setup for that model, definitely a "my bad". Now correct me if I am wrong there should be a plastic cap on the face of the pump removing that should let you access the drain plug for the pump. As others have said be super careful as getting dirt or debris into the pump will usually mean the replacement of it. Share this post Link to post Share on other sites
TimH 105 #8 Posted May 16, 2016 On 5/15/2016 at 8:28 AM, Blue Delta said: Yep, Gosh having done some reading the Eaton 700 is different to the 1100! TimH, Garry's linked chart has the correct oil grade that you will need when you change the oil in the pump. Garry is right on the money with the separate pump/gearbox setup for that model, definitely a "my bad". Now correct me if I am wrong there should be a plastic cap on the face of the pump removing that should let you access the drain plug for the pump. As others have said be super careful as getting dirt or debris into the pump will usually mean the replacement of it. Yes there is a cap and tank for the trans oil. I changed the hose it was leaking. And since there is not a good way to get the trans oil changed. I used a brake my brake vacuum system to suck out the old dirty stuff. Filled it with new oil Let set over night and vac it out again. The hardest job was cleaning the cooling fins and fan blades. They were all plugged. Used brake cleaning spray. What's funny is tractor runs better and faster Now on to next project repairing the battery hold. Thanks Guys 2 Share this post Link to post Share on other sites
