Slot Machine

Table of Contents

Mills Jackpot Mechanism Re-Assembly

Mills Reel Assembly Not Spinning

Mils Reel Assembly Not Spinning (Different Solution)

 Mills Jackpot Mechanism Re-Assembly


When a Mills Jackpot Mechanism is placed back into a cabinet. The reserve no longer works.


The reserve hopper has a lever on the side of the jackpot mechanism which MUST be placed into a forked tongue shaped lever that is spring loaded. Then the mechanism needs to be carefully positioned above the glass and placed onto the glass with the reserve hopper lever in the forked tongue shaped level. Now the mechanism will work.

The above photo, which is not the best, shows my ring finger (3rd finger down) on the lip of the reserve hopper. The blue straight (kind of) line is the lever attached to the reserve hopper. The blue line that looks like a fork shaped tongue is the lever that is spring loaded. The reserve hopper needs to be slightly lifted out of the jackpot (like a pendulum) and the fork shaped tongue lowered into the slot. Then the reserve hopper lever should be placed within the "V" of the fork shaped tongue lever.

This picture shows the reserve hopper lever (straight line) inside the "V" of the fork shaped tongue.

This needs to be held in place as the jackpot mechanism is placed on the glass and tightened.


Mills Reel Assemblies Not Spinning


Pull down the handle and the reels do not spin. They were spinning so something broke.


I opened the back and the large spring was dangling there. The cotter pin holding the bottom broke off.

Here is the spring and the broken cotter pin.

Here is the spring back in the game with a brand new thicker, more powerful cotter pin (thank goodness it fit through the hole).


 Mills Reel Assembly Not Spinning


The reel assembly once in a while worked but mostly did not work. Sometimes the game would not pay (and I ensured cheat slide at the bottom was open).


This slot machine (Mills Blue Bell 50 cent slot) was missing the spring that I added to the slot machine above. I added the spring and the cotter pins and it still did not work.

I was trying to find what was different between my working games and non working game. It was hard to see but Tim H thankfully pointed out what was happening. I read it in Dan Mead's book in Chapter 7.

But finally saw it clearly. When the handle is pressed, a lot of things happen. One it to push a flat bar behind the teeth of the three reel disks. Once the handle is pressed all the way down, this bar is released and causes the three reels to spin.

Looking at my machine, the flat bar was not getting behind the teeth, so it was half hazardly turning the reels lamely.

Tim said I need to loosen a bolt on the left that holds a chisel looking part in place. I did not see that the bolt was at the 12 o'clock position on the cast iron horizontal part that is normally used to lift the mechanism. I sent the first picture below to Tim and he told me exactly where to look.

As shown in the above picture, the arrow points at the bolt with another bolt in it needed to be loosened so that the metal sticking out (second arrow) could be tapped in 1/4".

The above pictures shows me loosening the lower bolt.

I needed to hold the frame in place to loosen the bolt.

Then I loosened the top bolt.

This picture shows arrows to the two bolts I loosened and the part sticking out too far that I will hammer in.

About to hammer in the part.

The part is now flush with the bar.

Side view showing how flush it is.

The two bolts are tightened and the reels consistently spin and pay!