(Topic ID: 91349)

DE Simpsons weak VUK


By mpm262

6 years ago



Topic Stats

  • 8 posts
  • 3 Pinsiders participating
  • Latest reply 6 years ago by PinballManiac40
  • Topic is favorited by 1 Pinsider

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#1 6 years ago

The right VUK on my DE Simpsons occasionally has trouble launching the ball up into the wire ramp. I have rebuilt the VUK assembly and this has helped reduce the problem; however, it still happens occasionally. Is there any chance there could be something wrong with the coil?

Any other suggestions?

#2 6 years ago

Be sure the switch is good, and solid connections for it to switch to switch to switch to the board in the head.

I don't know why, but DE VUK's switches can weaken the kick.

LTG : )™

1 week later
#3 6 years ago

I finally had some time to dive into this. Thanks for the suggestion, I checked all the wiring on all of the switches and coils in the wiring harness and everything checked out. There is a second VUK on the game that was firing normal but on the lower ramp. I switched the two coils and now everything is working with no issues. The coil that was switched is still weaker than the other VUK coil; however, since the ramp is much lower it is not currently an issue. I looked at the info on the coils and they are exactly the same? Any other ideas as to why the one is much weaker than the other?

2 weeks later
#4 6 years ago

Its been two weeks since I changed swapped my coils and unfortunatly today I am now experiencing the same weak VUK problem on my right VUK. The one that was swapped into the left side is still functioning OK. I have checked all connections and board terminations and see no problems. I am going to try changing the switch as the next step, any other ideas? It it odd that it worked for two weeks and now all of a sudden it is weaker like something damaged it over time ...

#5 6 years ago

I had the same issues. Once I changed all the coil sleeves and got some 220 grit sandpaper to the plungers to smooth them out (sanded same direction the part was machined), I hadn't had any more issues. Been working good for 8 months now.

#6 6 years ago

Were you having issues with multiples and had to change the coil sleeves and sand all plungers or you just did all of them as a good practice? I am wondering if I should just try this on my VUK with issues or go through all of them.

#7 6 years ago

I had the same issues as you are.
Sometimes the left kicker kicked 5 times before it kicked the ball out. Same with the right VUK as well.

#8 6 years ago

I need to do all the rest of the coils as well. My left flipper was even sticking until I did the same repair.
Mine definitely came off of a route.

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