(Topic ID: 87854)

Over-enthusiastic Jumping Jack kick-out holes

By Pinbee

10 years ago



Topic Stats

  • 7 posts
  • 3 Pinsiders participating
  • Latest reply 10 years ago by Pinbee
  • No one calls this topic a favorite

You

Linked Games

Topic Gallery

View topic image gallery

image-461.jpg
image.jpg
image.jpg
#1 10 years ago

Have been working the bugs out of a recently acquired Jumping Jack. Now that it's to a somewhat playable condition, the problem du jour is that both kick-outs smack the ball into the glass. With the glass off, the right kicker launches the ball up and over into the shooter lane. Both kickers have had the ends bent image.jpgimage.jpgto the side, all hardware under the board appears to be in original condition. The coils are plain brown wrapper, ohm out at 3.1, tested in circuit. Schematic calls for a 1496 coil, which I believe is 2.95 ohms. Will add that the transformer lead is not on high tap.

Is there some not-apparent mechanical adjustment that limits the travel of the arm? Is the tension of the spring on the sliding plate of the arm critical? Do I need to unsolder the coils to get an accurate read? Probably overlooking something obvious, as usual.

Will appreciate any suggestions.

#2 10 years ago

Gottlieb coils aren't usually plain brown wrapper. But even so, the coil number should also be stamped onto the base of the coil (where the lugs are). Might be worthwhile to double check there to, at least to eliminate the incorrect coils as being at fault.

(Same A-1496 coil is used in the ball return kicker, for comparison.)

There are no mechanical adjustments on the kicker itself (other than aiming the tips). But some pictures of them underneath the playfield might help identify other clues.

#3 10 years ago

Thanks, Dirtflipper...always at the ready. Here's another look. It seems the coils are generic with no stamped numbers, so maybe replacing them is a starting point.image-461.jpgimage-461.jpg

[attachment=1594285]

#4 10 years ago

You checked both the top and underside of the base plastic where the lugs are?

How do these look compared to the one on the ball return kicker? Is that one labeled?

Do the spring-attached plates move freely? The springs look a bit over-stretched possibly. I can imagine if they are too strong, preventing the plates from sliding, that maybe too much force is imparted to the part that kicks the ball. How do those springs look compared to the one on the ball return kicker?

#5 10 years ago

Sorry, my flashlight and mirror didn't show all...after pulling a coil off, it is indeed embossed Gottlieb 1496. The plates move freely, but the springs are certainly distorted, and maybe pull harder than the one on the ball return, which appears unmolested. Will try swapping springs tomorrow, and give an update. Thanks again.

#6 10 years ago

The insert on the yellow hole, is that located correctly? Maybe the overlap should be 180 degrees from there; it may be changing the lift of the ball.

#7 10 years ago

The spring from the ball return kicker calmed the launch down to an acceptable level. Also rotated the insert, Chrisbee. I think a set of new regulation springs and a little adjusting of the bend will resolve this issue. Thanks, guys!

Promoted items from Pinside Marketplace and Pinside Shops!
From: $ 4.99
Cabinet - Decals
The Pinball Scientist
 
From: $ 1.00
Playfield - Other
Rocket City Pinball
 
3,500
Machine - For Sale
Alpine, CALIFORNIA

Reply

Wanna join the discussion? Please sign in to reply to this topic.

Hey there! Welcome to Pinside!

Donate to Pinside

Great to see you're enjoying Pinside! Did you know Pinside is able to run without any 3rd-party banners or ads, thanks to the support from our visitors? Please consider a donation to Pinside and get anext to your username to show for it! Or better yet, subscribe to Pinside+!


This page was printed from https://pinside.com/pinball/forum/topic/over-enthusiastic-jumping-jack-kick-out-holes and we tried optimising it for printing. Some page elements may have been deliberately hidden.

Scan the QR code on the left to jump to the URL this document was printed from.