I'll try this again. Maybe I'm not making myself clear. I want to change the hydrostatic fluid in my mower. I can not find a place to drain the old fluid. I can,t find a fill port either. I have changed the gear box oil, no problem. Is this something the owner can do or does it require a Kubota "Technician". I can do this job if I can only find the two ports. Thanks again for all who answered. James
Kubota Model TG 1860 D
- Thread starter jwm
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SeymourBota
Platinum Member
You say you have changed the "gear box oil"?? Not sure which application you are referring to. Your garden tractor, being 2wd would only have two types of oil/fluid- engine oil and hydrostatic fluid. The HST component is your "gear box".
The drain would have to be near the bottom of the rear axle and the fill is either located on top of the component- if you have a dipstick to check it, or part way up the side or rear of the component, if you are required to fill to plug level (as with a differential).
I have looked at your parts manual on Tractorsmart's site and don't see any bolts labeled as "drain / fill".
The drain would have to be near the bottom of the rear axle and the fill is either located on top of the component- if you have a dipstick to check it, or part way up the side or rear of the component, if you are required to fill to plug level (as with a differential).
I have looked at your parts manual on Tractorsmart's site and don't see any bolts labeled as "drain / fill".
tomnky
Platinum Member
There is a fella member (Archdean) that has had one of these.
Check this link and maybe you can ask him.
TG 1860 Post
Check this link and maybe you can ask him.
TG 1860 Post
HST oil is changeable and does not require a technician. At the same time, the service manual does not describe how to do it and it is not obvious until you do a few things. This is what you need to do:
Step 1: Make sure you are looking at the HST and not the gearbox. The HST is the rear most transmission box and has the rear axles coming out of it.
Step 2: Take off the bottom rear protective cover. Take off the rear most bolts on the tractor; there are four bolts of them and the center two hold the tow bracket on. Take off the other two bolts that hold the cover on, they are located on the left and right sides of the cover.
Step 3: Jack up the rear of the tractor and support it safely. Then take off the right rear wheel. This will give you access to the HST oil level check hole.
Step 4: Find the HST oil drain plug on the bottom rear end of the HST. It uses a threaded plug with an Allen head (in think that a 6mm Allen head wrench works on it). Get an oil drain pan in position and remove the plug to drain the oil. Then replace the plug.
Step 5: Find the HST oil level check hole and remove the plug. The hole is on the left side of the HST, a bit forward of the left rear axle and is not easy to find. I had to lay on my back to see it. The plug looks very similar to the drain plug (it is probably exactly the same) and you can remove it with an Allen wrench.
Step 6: Remove the air vent line on the top of the HST. Mine has a black hose attached to it with a valve on the end. The black hose is hose clamped to a plastic fitting that threads into the top of the HST.
Step 7: Use a fluid pump (cost about $8 at an auto supply store) to pump the oil into the transmission. It should take about 3.7 quarts. The HST oil level check hole is a "fill to spill" type. So when oil drips out of the check hole, stop adding oil.
Step 8: Replace the plug, the air vent line, and the bottom rear protective cover. Your done.
This task is no more difficult than replacing the engine oil but might take more time since there are bolts to take off and replace.
Note of CAUTION: I did this to a TG1860 in an effort to fix a transmission problem that I was having that it DID NOT fix the problem. So if you transmission is not working properly, this oil change will not necessarily fix your problem.
Step 1: Make sure you are looking at the HST and not the gearbox. The HST is the rear most transmission box and has the rear axles coming out of it.
Step 2: Take off the bottom rear protective cover. Take off the rear most bolts on the tractor; there are four bolts of them and the center two hold the tow bracket on. Take off the other two bolts that hold the cover on, they are located on the left and right sides of the cover.
Step 3: Jack up the rear of the tractor and support it safely. Then take off the right rear wheel. This will give you access to the HST oil level check hole.
Step 4: Find the HST oil drain plug on the bottom rear end of the HST. It uses a threaded plug with an Allen head (in think that a 6mm Allen head wrench works on it). Get an oil drain pan in position and remove the plug to drain the oil. Then replace the plug.
Step 5: Find the HST oil level check hole and remove the plug. The hole is on the left side of the HST, a bit forward of the left rear axle and is not easy to find. I had to lay on my back to see it. The plug looks very similar to the drain plug (it is probably exactly the same) and you can remove it with an Allen wrench.
Step 6: Remove the air vent line on the top of the HST. Mine has a black hose attached to it with a valve on the end. The black hose is hose clamped to a plastic fitting that threads into the top of the HST.
Step 7: Use a fluid pump (cost about $8 at an auto supply store) to pump the oil into the transmission. It should take about 3.7 quarts. The HST oil level check hole is a "fill to spill" type. So when oil drips out of the check hole, stop adding oil.
Step 8: Replace the plug, the air vent line, and the bottom rear protective cover. Your done.
This task is no more difficult than replacing the engine oil but might take more time since there are bolts to take off and replace.
Note of CAUTION: I did this to a TG1860 in an effort to fix a transmission problem that I was having that it DID NOT fix the problem. So if you transmission is not working properly, this oil change will not necessarily fix your problem.
carl6405
New member
Oly, Wow, thank you for writing such a detailed article on changing the hydro fluid on the TG. I have the TG1860G (Diesel) I presume the instructions would be the same?
I found the dipstick on my mower, and the fluid is low. The fluid is very sticky and I am sure this fluid has never been changed. What type of fluid does it take? Smells much like differential fluid.
Thank you
I found the dipstick on my mower, and the fluid is low. The fluid is very sticky and I am sure this fluid has never been changed. What type of fluid does it take? Smells much like differential fluid.
Thank you
sandyc
Veteran Member
You will probably need to use UD2 or super UD2. I’d suggest calling a kubota dealer and ask just to make sure.
I did this on my mower. Replaced it with he correct fluid in the correct amount but have power only to about half throttle. Full throttle yields the pump useless. Could I have put the charge pump on backwards? I don't think I have a failure because it works great at half throttle and down. Any suggestions help. Thanks
fruitcakesa
Veteran Member
I had a T1400 hydro and thought it could use an HST fluid change although it was operating correctly at the time [I got it used with unknown hours].
I don't recall where the drain was but I managed to drain it and refill it and it refused to move from that point on. I tried all the tricks I could glean from the interweb and from tractor guys but nothing worked. I ended up selling it to a "handy" fellow who thought he would try to fix it for $200.
I now have a T1460 and likely will never change the HST fluid
I don't recall where the drain was but I managed to drain it and refill it and it refused to move from that point on. I tried all the tricks I could glean from the interweb and from tractor guys but nothing worked. I ended up selling it to a "handy" fellow who thought he would try to fix it for $200.
I now have a T1460 and likely will never change the HST fluid