Overfilling tranny

Bugzilla46310

Active member

Equipment
2022 BX2680 198? AC 916H
May 22, 2022
184
185
43
Demotte, IN
Did the 50 hour maintenance on my 2680. Hydraulic fluid is about 1/4” above the full mark. Should I drain some out or is this a nonissue? In the past, you would hear about blowing out seals by overfilling.
 

old and tired

Well-known member
Dec 8, 2019
1,919
1,297
113
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I can't say for sure for your model but mine actually had a Product Improvement Bulletin from Kubota that replaced the sight glass with a dip stick and Kubota added 1.5 gallons more. This was to get the oil level up above the ratching cams (long store...).

There is roughly 3.25 gallons of extra space (give or take) in the oil reserve tank. I run my L2800 with a gallon over and never had the slightest issue. Except that I use an extra gallon that I don't really need to.

How much oil totally is in your hydraulic system? My guess is in all the lines and cylinders, you are using a gallon the rest is just chilling in the tank... That's my take.

I've lost 3 gallons and was still able to drive it back to the house to fill it up... also, no problem. My model uses 7.5 gallons (IIRC).