Mounting Leaf Gen2 motor/gearbox upside down?

Nissan Leaf/e-NV200 drive stack topics
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bexander
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Mounting Leaf Gen2 motor/gearbox upside down?

Post by bexander »

For a Leaf EM57 motor/gearbox combo, to get the diff in front of the motor there are a couple of examples fliping the motor 180 degrees sideways and running it in backwards. Is there anyone who have tried fliping it upside down instead, still running it in forward? Maybe not totaly upside down but 140 degrees so inverter mounts does not stick under the differential.
Will mount inverter remote anyway.

Thoughts?
Forward (OEM)
Forward (OEM)
Flipped 180 deg sidways (reverse)
Flipped 180 deg sidways (reverse)
Flipped 140 deg upside down
Flipped 140 deg upside down
Zieg
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Re: Mounting Leaf Gen2 motor/gearbox upside down?

Post by Zieg »

Cool, another Onshape user!

The main issue is managing the lubrication. There's also a vent hole that sits between the reducer and motor, and if you flip it upside down the fluid will pour out. You'd have to plug it and drill a new vent at the new 'top'. Unfortunately that still doesn't solve the rest of the splash lubrication system. There's also a reservoir above the intermediate shaft that gets filled with atf during forward motion and has a drip hole to feed the gear teeth and possibly a bearing. Probably need a scavenge pump and squirters or something.

Also do note that newer leaf reducers had sealed bearings, so at least those should be okay without lubrication (in theory at least, although they may still need atf splashed on them for cooling or indeed to get past the seals and keep them oiled internally).
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