Quoted from Medic:Sigh. I loosen the springs a little and the doors open but now they don’t bash again as it’s not enough tension on the switch. Back to square 1.
Both the motors are bad. I have seen this exact issue.
Both motors need full power the get past the spring tension.
The motors actually get weak, and have no power at all after awhile.
It has to do with the way the mech works. Stalling the motors as a stop, while they are fully energized without cutting the power to them, wears them out.
Replace them, get a couple spares also when you order.
Mention that people keep getting motors without capacitors on them, they might look into this.
Get some extra black door screws and maybe an extra door post (in case you break off a screw in a post).
Get extra screws for any that have stripped heads or are starting to wear.
Always put brand new screws in when working on this mech. They fatigue and will break on disassembly the next time you service this unit.
Get a proper Allen wrench set that fits the screw heads without any slop.
Put a little flat on the spindle shaft, with a dremel, to help with the slipping issue, if they havent done that for you.
Put blue loctite on all of the screws, this mech is notorious for loosening up and failing.
I have put 6 motors in so far.
This mech can be maddening, but also can be made to work perfectly with a little care and knowedge.
Get this tool, works perfectly for removing bashed up door screws:
https://www.amazon.com/Crescent-RT24CVS-Cresent-Tongue-Groove/dp/B01CDJCPUI/ref=asc_df_B01CDJCPUI/
You will find many, MANY uses for this little tool on a pinball machine.