Mowing BX mowing deck "gear box" oil change

RjCorazza · May 29, 2016

Gotcha... I misread your post. PHILIP8N's application specifies SUDT-2 for the mower gear box, which surprised me. Can you use it? Probably. Should you? I would stick with what is specified in the manual.

PHILIP8N · May 29, 2016

From my manual. Philip.

dfran1 · May 29, 2016

PHILIP8N said:
From my manual. Philip.

I have a BX, I see in my manual for the BX I can use SUDT2 in transition (hydraulics) and front axel, but my mower manual does not, is it because Kubota was to lazy to change the manual or ??

Philip, I see you have a 2009? so have you been using it in your mower since then? When did you do your first change on it?

On a side note: not that I want to go off topic of this thread, is any of the engine oil Kubota supplies synthetic or semi ?

oldballs · May 29, 2016

Trying to be helpful here........my OE manual (2009) for the BX mowers RCK60B, 54 and 48 say to use "SAE 90 API GL5 Gear Oil". I'm sort of surprised that Phillip8N's manual says otherwise. The Kubota dealer said that their 80-90 gear oil was just as good. Go figure.
My thinking is that the mower gear box is turning a whole lot faster than the front axle gears that use UDT varieties....Thus, I'd use a 80-90 weight, if it were me.

dfran1 · May 29, 2016

oldballs said:
Trying to be helpful here........my OE manual (2009) for the BX mowers RCK60B, 54 and 48 say to use "SAE 90 API GL5 Gear Oil". I'm sort of surprised that Phillip8N's manual says otherwise. The Kubota dealer said that their 80-90 gear oil was just as good. Go figure.
My thinking is that the mower gear box is turning a whole lot faster than the front axle gears that use UDT varieties....Thus, I'd use a 80-90 weight, if it were me.

Hi,
This is why I am bringing up this subject, to find out what others feel and think.
My manuals say the same, but SUDT2 can be used in transition (hydraulics) and front axel, isn't the hydraulics more moving than the gears in the mower great box?
Also since more car manufactures are also switching to synthetic, either being tighter tolerances or? Wouldn't synthetic in the mower gear box be better also?

On a side note: not that I want to go off topic of this thread, is any of the engine oil Kubota supplies synthetic or semi ?

Thanks to all!!

PHILIP8N · May 29, 2016

dfran1 said:
I have a BX, I see in my manual for the BX I can use SUDT2 in transition (hydraulics) and front axel, but my mower manual does not, is it because Kubota was to lazy to change the manual or ??

Philip, I see you have a 2009? so have you been using it in your mower since then? When did you do your first change on it?

On a side note: not that I want to go off topic of this thread, is any of the engine oil Kubota supplies synthetic or semi ?

My GR2120 is a 2013, which has very similar mower deck as your BX, same gearbox.

I changed my engine oil at 11 hours, then again at 50 hours. I changed the mower gearbox oil after the 1st summer of use.

Kubota USA factory fill engine oil is mineral 10w-30.

My Grand L3940 is a 2009.

Philip

dfran1 · May 29, 2016

PHILIP8N said:
My GR2120 is a 2013, which has very similar mower deck as your BX, same gearbox.

I changed my engine oil at 11 hours, then again at 50 hours. I changed the mower gearbox oil after the 1st summer of use.

Kubota USA factory fill engine oil is mineral 10w-30.

My Grand L3940 is a 2009.

Philip

Thank You Philip.

I am going to use the Kubota SUDT-2 also as you do for the gearbox and transition (hydraulics) and front axel.
Just one more question please, do you use the Kubota oil for the engine or what brand and w?
Thank you

PHILIP8N · May 29, 2016

dfran1 said:
Thank You Philip.

I am going to use the Kubota SUDT-2 also as you do for the gearbox and transition (hydraulics) and front axel.
Just one more question please, do you use the Kubota oil for the engine or what brand and w?
Thank you

I do not use Kubota brand oil for the engine. I use a name brand 5w-40 synthetic oil. Philip.