Engine and Transmission Fluid Capacities: Kubota Review  -- Kubota Tractors Discussion Forum and Review Engine and Transmission Fluid Capacities: Kubota Review -- Kubota Tractors Discussion Forum

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 12-18-2000, 13:43 Post: 22576
Danny Hsu



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 Engine and Transmission Fluid Capacities

I recently change engine oil on my Kubota B7100HST-D and the dealer tells me my engine holds 4.5 quarts with filter change. After putting in four quarts, I started the engine to get oil pressure and turned off my engine to check my dipstick, the dipstick indicates I am one quart overfilled. The new oil looks dirty. I drained a quart from the crankcase until it shows full on my dipstick. The oil looks dirty for just running it for a few minutes. My question is: I am getting diesel fuel in my crankcase because I forgot to fully close my throttle lever hence the overfill? Question number two: What is some of the reasons for the transmission fluid to look milky? I bought my Kubota B7100HST-D used with 633 hours on it. The unit appears to operate satisfactorily but then this is my first tractor. The serial number is 62228. Can someone tell me what year it is? Thank you so much for all your help.






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 12-18-2000, 14:28 Post: 22577
Bird Senter

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Danny, I don't know about all the B7100s, but if I remember right, when I had a 1995 B7100, it took 3.5 (or 3.4) quarts to change oil and filter, so you probably just put too much in it. And the oil will "look" dirty very quickly after you change it, especially if it was warmed up before you drained it to get all the old oil out. I don't know about the hydraulic oil, but think a milky appearance is usually due to either water in it or air from a little foaming. If it were me, I'd change the hydraulic oil & filter & clean the screens or strainers, and see if that didn't cure it.






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 12-18-2000, 22:08 Post: 22595
KlayW in MI



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 Engine and Transmission Fluid Capacities

Could that 7100 have two oil drain plugs like the book says my 2710 does? If only one was drained than a full re-fill would show you overfull and still dirty. Just a thought!






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 12-18-2000, 22:44 Post: 22598
Roger L.



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If it looks like dirty chocolate milk, then that is water in the oil. This is nothing to panic about. This is common in transmissions - due to condensation mostly, but also sometimes there is a leak around the shifter, vent, or something else on top of the housing. The oil rarely runs hot enough to evaporate the water out of the oil. This is why transmission oil should be changed annually. Change the filters too if the oil looks like you describe. If not, I change them every other time. Not a bad idea to throw a tarp over your tractor in wet weather either...






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 12-19-2000, 06:46 Post: 22602
Bird Senter

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KlayW, I have a B2710 now with the two drain plugs, but when I had a 1995 B7100, it only had one.






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 12-19-2000, 07:45 Post: 22605
TomG

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I don't know the B7100's HP, but 4.5 quarts does sound like a lot of oil for a compact. Owner's and repair manuals are good things to have, and I imagine they can be ordered from a dealer. I also believe there is a web site that carries manuals from an independent publisher (I may have the address somewhere). I wouldn't worry too much about where the throttle position is when the engine is off, or shutting off the fuel flow valve for that matter. Diesels are not like gravity fed gas engines where the carburetor float valve is the only thing preventing the crankcase from filling up with fuel. It would take a rare set of circumstances before diesel fuel would drain into the engine crankcase.






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 12-19-2000, 08:07 Post: 22608
Bird Senter

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TomG, the B7100 is a 3-cylinder, 16 hp. When I had mine, I bought an aftermarket shop manual from Tractor Supply Co., but would not recommend it; not nearly as good as Kubota's manual. Of course, you're right about the other comments, and just for your information, the B7100 (or at least the 1995 model) didn't have a fuel shut-off solenoid, or separate fuel shut-off kill switch. When you pulled the throttle lever back to idle, there was a detent, and then pulling it back past that detent was the kill switch.






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 12-19-2000, 09:47 Post: 22613
Danny Hsu



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Thank you all for your comments. I don't have any manuals with my tractor as yet but I am going to get them soon. I checked the crankcase thoroghly and only found one drain plug. As for the transmission, I discovered a loose hydraulic line to my loader, and it could have been sucking air and causing air bubbles in the hydraulic systems. I don't know where the screen is or where the filter and drain plug is located. I will just have to wait until I get my manuals before doing any more maintenance. One more question: How do I engage and disengane the limited slip differential? You know, the foot lever on the left rear of the running board? I am not able to move it. Also, my fuel shutoff valve on the filter cannister will not close. Is there an interlock device attached? Thank you all again for your quick responses. I really enjoyed reading them and learning alot from you guys. Have a nice day from sunny San Diego.






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 12-19-2000, 16:04 Post: 22625
Bird Senter

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Danny, I can tell you something about the 1995 B7100, and only hope yours is about the same. The hydraulic (transmission or whatever you want to call it) filter is under the little console. I'm guessing you have a little knob on each side that you remove, then you have to unscrew the knob from the speed set (cruise control) lever, two spring loaded hooks that hold the hood shut, lift off the console cover, and the filter is an upside down spin on. The screens or strainers are in the lines that go into each side of the tank (almost directly under the seat - under the floor of course), and darned if I know how to describe it; you need to look at the manual for a picture. And the little shut-off lever at the fuel filter should turn very easily unless it's damaged or seized. No interlock involved. And the differential lock pedal should depress easily with your left heel unless there's something wrong with it.






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 12-19-2000, 17:25 Post: 22629
Danny Hsu



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Bird Senter, Thank you Bird Senter for your post. I just found out from tractorsmart.com I have a 1990/1991 model and yes I ordered the operator and parts manual from them also. I think the filter is under the console cover. I will check it out soon. Thanks again.






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Discussion Boards > Active Subjects > Messages as Posted > Kubota Review Forum

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Art White 2 | Bird Senter 7 | DanaT 1 | Danny Hsu 7 | Duane Pearl 3 | KlayW in MI 1 | mbjacobs 1 | richard james allen 1 | Roger L. 5 | TomG 3 |




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