parabellum wrote:Have filled Mxus DD sensor hub with Motul SAE 0W40 oil. 150ml
Hi parabellum, any updates on how this is working out with use ?
This oil cooling sounds like a good idea to me, so I had a crack at it too.
I also modified an MXUS DD hub as follows:
1) Added a temperature sensor in the windings near the top of the motor ( away from the oil pool )
2) used silicone gasket sealent to fix the covers and seal the axle slot.
3) Added a threaded filler hole in the side cover for the oil.
4) Filled the hub to various levels with mineral ATF (Dexron II) and measured the no-load current @ 36v
At 400ml fill, the oil level is just below the axle, where the filler hole is in the above photo, (you can just see the red coloured oil inside the hub).
With this much oil, the motor makes a satifying, just audible ,sort of sloshing noise when it is spun up.
No oil, no load current = 1.05 A
150 ml oil @ 18 degrees C = 2.0A
200 ml oil = 2.0A
250 ml oil = 2.1A
300 ml oil = 2.15A
400 ml oil = 2.15A
I will leave the oil level @ 400ml and install it on my bike to test the thermal effects.
The bike currently has an identical motor fitted, including a temp sensor (just no oil), so the comparison will be interesting.
edit: corrected reference to Dexron II