When my Getaway beacon motor stopped working correctly, I search all over to see if someone had posted a tutorial on how to repair a beacon motor for HS2. I couldn't find anything, so I figured I'd document my attempt at it so that it might help others in the future. Below I'll explain what I did to get my motor working again. This is for HS2, but I believe that it will be very similar for other games that use these types of motors, such as F14.
The problem with the motor was that it didn't always turn. Sometimes it did, sometimes it didn't. You can see my other thread about it here: http://pinside.com/pinball/forum/topic/getaway-hs2-beacon-motor
I did end up buying a new motor, but it turns out that I really didn't need to as you'll see below.
This is where the motor/gearbox combo should look like (this is the new motor, because mine was missing the motor cap):
To open it up, you'll have to pull off the cap on the motor. You will then have this:
You can now pull the motor off of the gear box. It might be tight. Just make sure you pull it straight out, and don't pull on the wires.
Here's the motor separated from the gearbox:
NOTE: Ignore the paper clip on the motor shaft. That should NOT be there. It was my previous attempt at fixing this before I knew how the motor went together.
To open the gearbox you'll need to bend the metal tabs holding the cover back a little. I did this with a large set of needle nose pliers:
Here are some pictures with the cover off:
Here are some pictures with all of the parts separated and cleaned. You can clean the old grease off with brake parts cleaner (do this outside on a non-windy day).
NOTE: Those pins that hold the gears in the gearbox come out, so don't lose them.
Here's the grease that I used (Super Lube):
Here is a close up of the motor coil and its housing before greasing. You'll want to put some grease on all the moving parts that make contact (shaft and under shaft). To get grease under the shaft in the housing, I used a bent paper clip.
Next, put the motor coil back in its housing and push it into the gearbox case. You'll hear it click into place if you did it correctly.
When putting the gears back into the gearbox, note the orientation of this middle dual gear. It has to go in with that long bar against the side like that. This allows that little bar to hit the gear and prevent the motor from going in the reverse direction. See the correct orientation here:
Next, grease up all the gears. You'll want grease on the pins holding the gears and the gear surfaces that touch other parts. Turn the motor to get the grease to go into all of the teeth. See the greased up gearbox here:
Finally, snap the cover back on. Mine held in the way it was, but you might want to try to bend the metal tabs back a little. Either way, once it's screwed into your pinball machine, the cover will be held into place. Here's what my final product looked like. If yours had a motor cap, snap that back on as well.
I've tested this with 12VAC on the bench and it works very smoothly. It starts spinning every time, and is very quiet. I'm keeping this as my spare.
NOTE: I've seen things posted about these motors saying they are 24VAC and also 48VAC. This information is incorrect. They are in fact 12VAC motors.
I hope you guys enjoy this tutorial. Please let me know if you see any errors.