While Betzy is getting painted I have a bunch of little projects that I needed to get done. One of them was the starter made a "squealing" kid of noise every once and a while. It happened after the engine started and the starter was spooling down. The engine started perfectly fine, only the noise a problem. I figured I would take it apart and lube it up.
So here is the starter. It looks like it is in good shape. I call the geared part on top the bendix. Not sure why, but that is what they call them on aircraft engines. It is electrically engaged to the flywheel by the starter solenoid. Once the starter solenoid has engaged the bendix, the starter motor is switched on. The bendix slides up and down the shaft shown here.
I removed the positive terminal on solenoid so I could remove the motor.
Un-bolted the motor. It is a good idea to mark everything with a sharpy. It helps speed things up on assembly.
Motor separates from the top part. There is a little ball bearing on the end of the motor shaft. There is also a planetary gear setup for gear reduction. It gives the motor more torque. Some plastic parts in here.
I remove the solenoid,the rubber cover, and the metal plate under the solenoid...
... then remove the bendix and arm as an assembly.
I cleaned everything up and lubed the shaft with a dry film graphite spray lube. Now it slides up and down the shaft really easy. The end bearing on the shaft gets a little grease.
The solenoid gets only a cleaning and dry film lube as well. Do not grease. It would end up sticking.
Don't forget the little ball and a little grease.
Now the motor. Pull the housing of by pushing the end shaft. The magnets are holding it in place. Be careful to keep the end cover on.
Now remove the end cover
Now you end up with this. This is the armature with the brushes all together. There are springs that hold the brushes tight against the armature. Be careful you can chip the brushes if you rotate it back wards.
I pulled the plate of and inspected the brushes for wear. The armature looks like it has minimal wear. No signs of overheating. This is where you could clean up the armature with a little sandpaper if you needed to.
I put the motor back together with a little bit of grease on the shaft end bearing. The brushes need to be retracted to fit over the armature. Takes a little bit of fussing around so be careful.
I lubed up the planetary gears and put everything back together in the reverse order. A quick check with a jumper battery and everything works. Nice and quiet.
So now I am on to my next project. I did check in on Betzy yesterday. Everything looking good.
More updates soon.
gord