CC 2015 President electric motor cleaning

 Last few years we have been getting many battery issue. They are getting old; batteries tend to last 3 to 5 years with these rapid chargers and off-season storage. Recently when they come in, I'm starting to clean motors and checking brushes for wear. After 7 years I find they are loading up pretty good with spent brush material. Could be drawing more power from batteries too.  

Disconnect battery before starting, put it in tow first and turn key off brake set and in neutral. I like to cycle the pedal up and down a few times to draw out some of the power. You can also just wait 5 minutes before disconnecting the battery. Wearing a face Shield is recommended.

Got ahead of myself in pics. easy to remove. Caution weighs 50 + pounds. More pics below from assembling for reference on removal.  

Set in on some wooden blocks.

I just marked this to install speed sensor in same location.

Every magnet so far have been cracked.I think they would be ok to reuse, I have some in stock from kits .  

Remove the bolts for brush holder. 

Slide it up and off the field winding case. I didn't find a need to mark where field winding case lines up it was pretty straight forward.

3 prong puller made quick work pushing it off the bearing. Caution, always be aware of the windings so they don't get damaged.

 Brushes in fair shape for 7 years old. 

Check bearing for play. 

I'll pop the spring holders up like this for install.

After blowing out I use some contact cleaner on brush surface.

Armature needs a little cleaning.

Nylon scrub pads work well. I'm using a medium emery cloth. Spray clean afterwards. Blow out old brush material too. 

Put end on your block of wood.

I'm using a large socket to lightly tap back on to bearing.  

Tap it on till it lines up with brushes.

Don't forget to flip brush holder springs back on. Keep them high and off the wire.

Very lightly lube end for install.

Field windings are a mess. Lots of brush material build up. 

A little air and they look like new.

Line up terminals 

They are slightly offset. Snug down bolts. 

A little brake clean does the job.

Check the seal before installing.

Does way a lot and a little awkward. I found moving up and down and back and forth got it on fairly quickly. 

Draw it in with the bolts alternating back and forth.

Reinstall wiring red and green face you at rear and I like to keep wires 90 degree to case.

Tools needed

Final connection torqued to spec along with the rest. 

 Fairly easy job.

Start to finish on a lift maybe an hour. 

Second one today, just retrived this one from cart barn for a no go issue. 

You can see why, brush wires fell or burnt out.

Have a set of new ones. 

In a pinch I have had great luck drilled out and resoldering wires back on. 

And in

Also so noticed it not beeping when pushing it in tow, a sure sign of spent speed sensor. 

Old 4 pass parts came in handy to replace broken spring on above motor.