TMC gearbox oil change

[Mataji]

I have a new gearbox on my Nanni diesel and need to change the oil after 30 hours. There is a large nut on top of the gearbox (23mm spanner), I can’t get this nut to shift. Can I fill through the dipstick hole or do I need to get more muscle on the big nut?

 

[Boater Sam]

I have a new gearbox on my Nanni diesel and need to change the oil after 30 hours. There is a large nut on top of the gearbox (23mm spanner), I can’t get this nut to shift. Can I fill through the dipstick hole or do I need to get more muscle on the big nut?View attachment 157025

Is not that "big nut" just part of the casing? Fill through the dipstick.

 

[VicS]

Is not that "big nut" just part of the casing? Fill through the dipstick.

The big nut is the filler !

 

[Mataji]

So do I get a big spanner and hit it with a hammer or a small funnel and fill through the dipstick hole?

 

[Bodach na mara]

I have not managed to get mine open either and filling through the dipstick is real pain.

 

[Mataji]

Luckily I found a big socket (27mm or 28) and then it was a doddle.
Thanks for the help.

 

[iamtjc]

I couldn't get that big nut off on my gearbox.
I drain it with a big syringe and a thin rubbery tube sucking the fluid up through the dipstick hole. Refilling is done by sucking up the ATF from the bottle and squirting it into the gearbox. It is now a really quick and simple operation.