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Rake Sweep Problem


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  • Rake Sweep Problem

    Ok here is one for you guys.. I am having a problem where the rake is contacting the deck, But it only happens if it is tripped with the manual triggering. (A ball contacting the pit cution).. If the infa red trips the rake, then the rake doesnt contact the lane surface..

    Any Ideas??..

  • #2
    Re: Rake Sweep Problem

    Sounds like the shotgun isn't relatching at 45 degrees as it should. I would suggest replacing the shotgun with a known good spare or repairing the one removed. It maybe that the shotgun needs to be adjusted. Perform the Rake board height adjustment #3 per A/P service manual.


    • #3
      Re: Rake Sweep Problem

      That is the problem.. I have tried to adjust but the only way that the shotgun will relock. Is ff it is adjusted to the point where the trigger link cannot hit the shotgun to trigger it manually


      • #4
        Re: Rake Sweep Problem

        There are over 26 adjustments that affect the rake/sweep fuction. Get the book out and know it before you start. The adjustments have to be done in order and correctly. But they are only a starting point, from there you tweak it right...

        Your problem sounds like a rake shock adjustment or the the trigger link is just adjusted wrong.

        Start at the beginning and verify all rake/trigger/cushion adjustments as per the book.
        BEER: It's not just for breakfast anymore.


        • #5
          Re: Rake Sweep Problem

          This was posted before awhile back...but I'm sure you will benefit from the info:

          Step 1: Perform deck lift shaft adjustment. Adjustment 13 on page 3-16 in your service manual. This will position the deck lift shaft and the rake sweep shaft in the proper positions.

          Step 2: Position "C" lever so that its closest point is 1/4" from rake sweep shaft. Loosen set screw on rake trip shaft assy. to obtain this clearance. (if you loose the gap at the trip latch, don't worry. Don't open trip latch until you get done with step 7)

          Step 3: Set rake sweep hook clearance above block to 5/16". You may need to change 12-250040 link and roll pins if there is too much wear. This may cause you to have to adjust the out-of-range latch if these parts are wore...Adjustment 21 page 3-25 in service manual. But that is a whole other subject...

          Step 4: Position rake at rearmost position (180) and measure gap between rake sweep arms and cross member of frame. This gap should be 1/4". This gets the rake as far to the rear as possible without hitting the frame. Use the rake sweep link to obtain this clearance.

          Step 5: Position rake lift cam follower in low of rake lift cam and adjust the rake lowering stop bracket to obtain 1/16" between it and the lower side of the "V" lever.

          Step 6: Cycle machine to 135 degrees and set clearance between rake sweep hook and block to 1/16". Use your left hand rake stop bracket to obtain this clearance. (I usually back the machine up from 180 to 135 instead of running machine forward.) Loosen the right hand stop bracket and push the bracket and the rake support arm rearward until the left support arm just starts to lose contact with the left stop bracket. Tighten right hand bracket.

          Step 7: Loosen jam nut on shock absorber plunger and turn fixed stop counter-clockwise until rake trip latch WON'T latch. (You will have to trip it back to see if it won't latch.) When you reach that point where the trip latch won't latch, start turning the fixed stop clockwise until the latch just falls back into place. Turn fixed stop 1/2 turn more clockwise and lock jam nut into place. This will create a 1/32" gap (actually, slightly less) at the latch.

          Step 8: This step I borrowed from Masternut...I like this way better, it times the cam much better than my old way...thanks Masternut...
          Position rake board between the 2,3 and the 4,5,6 spots on the rearward sweeping motion of the rake. Measure and record the height of the rake board. Continue to cycle pinsetter until the rake board is 1" behind the #1 pin spot on the forward motion of the rake. Measure and record the rake board height. Release the rake sweep hook and allow the rake to come forward. This will release the pressure off of the rake lift cam. Take the two measurements and find the amount of the difference between them. Divide the difference in half. If your first measurement is higher than your second measurement, add the divided difference to the second measurement and record it. Record this number as your "desired height". Loosen the six bolts holding the rake lift cam in place on the 1:1. Rotate the cam clockwise ever so slightly and tighten the bolts. Move rake rearward and latch back onto block so rake board is again 1" behind the #1 deck spot. Check to see if your rake height is at the "desired height" you wrote down before. If not, continue adjusting cam until you obtain that height. If you did this properly, you should be able to return to the spot between the 2,3 and the 4,5,6 spots on the rearward motion of the rake and obtain the exact same measurement. (If your second measurement was larger than the first, reverse the procedure by subtracing the divided difference from the measurement to obtain the "desired height". Then rotate the cam counter-clockwise to get the height.)

          Step 9: With rake at either position mentioned above (1 inch behind #1 deck spot on forward motion of rake or between the 2,3 and the 4,5,6 spots on the rearward motion) set rake board height to 1/4 of an inch by adjusting the rake lift rod from "V" lever to sweep arm.

          By following these adjustments step by step, not skipping ANY of them, your rake will sweep near perfect. If you skip any adjustment or do them out of order, you will not obtain the desired effect. In other words...your on your own. If you have any questions, feel free to call me...602-249-1715
          TSM & TSM Training Development
          Main Event Entertainment
          480-620-6758 for help or information


          • #6
            Re: Rake Sweep Problem

            Good post, I would only suggest that one should take the measures with the crank arm straight down (while sweeping), and straight up (while coming foward).This will exactly split the rake cams movement, whereas using a measure from the spots has a few variences involved.


            • #7
              Re: Rake Sweep Problem

              sounds like shotgun not closing at 45 check all rollers and bolts might be a bent bolt had that problem before


              • #8
                Re: Rake Sweep Problem

                Just my experience with this same problem...but in all cases where this has happened to me, the spring on the shotgun latch was weak, and there was oil build-up in the 'notch' where the locking cam follower dwelled in to re-latch the shotgun.

                Wiping the dwell (notch) with cleaner and replacing the spring always cleared this up for me. I've even added a "helper" spring to get through league when this happens.

                Space is the Place!


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