Trying to remove motor from hub on 8Fun

[David Galloway]

Hi
I have a 8Fun, 24V, 250W motor on the front of my Kettwiesel recumbent trike and need to remove the motor from the hub - went through a flood yesterday and has stopped working. (There's a surprise!)

The motor is similar to that shown in the picture - it has 4 indentations to accept a special tool (which I intend to make). Two questions:
1. Does the cover have a right or left hand thread?
2. Any advice, apart from drying thoroughly!, on what to do when I have it apart.

Thanks!

 

[neptune]

Are you sure that you need to take it apart? Is it a sensor or non sensor hub? { how many wires come out of it?] If the problem is electrical, a multimeter will tell you what the problem is before you commit to stripping it? Need more info? ask!

 

[David Galloway]

Thanks for the speedy reply.
I can hear water sloshing around inside, albeit a small quantity, so I feel it does need to be stripped.
There are three wires into the motor.

 

[Deleted member 4366]

You should be able to drain the water out of the 6 disc fixing holes. Once you've done that, spray in a lot of WD40, slosh it round and drain it out. Check your motor connector too. Make sure that the disc holes are sealed afterwards.

 

[David Galloway]

Thanks for the tip about draining the water. I hadn't figured out what the 6 screws were for as by trike has discs on the two wheels at the back. It also explains how the water got in as the screws were only finger tight!

All being well I will not need to remove the motor. But still keen to know if anyone has done so with this particular hub. Does the cover unscrew counterclockwise?
What are the three Philipsmscres for?
Will I need a puller once the cover is off?

Help appreciated

 

[Deleted member 4366]

Sometimes there's one or two grub screws near the spoke flange that go into the thread. They have to be removed first. Some side-plates have LH threads and some RH. There doesn't seem to be a rule, but more are RH. You need to make a proper tool to unscrew it because it takes a fair amount of welly to start.

The three philips screws hold the smaller inner plate to the axle.

You don't need any special tools once it's open.

 

[David Galloway]

Thanks, most helpful.

 

[Cyclezee]

Personally I would open up the motor, mop up as much of the water as possible and allow the rest to evaporate at room temperature then re-grease the planetary gears. We use Dow Corning Molykote PG-21.

 

[David Galloway]

Thanks for all the advice, particularly the tip about the grub screw!
I have now removed the motor and am allowing it to dry out at room temperature as suggested. I wasn't too keen to try WD40 as other posts suggested it might effect the grease.

The DIY tool was made by grinding the end of lenghts of screw thread and fastening these to some MDF with a nut on each side, thus allowing for some adjustment. After a couple of hours work making the tool, the cover came off without a problem.
Just need to hope that resolves the problem and I can get it back on the road. Cycling a recumbent trike up the Surrey hills with a motor and battery that aren't working was hard work!

 

[Deleted member 4366]

Which direction did it undo?

 

[David Galloway]

Sorry, should have mentioned that it was a RH thread. And it was not very tight either.