Double Shuttle the 7 pin

[kevin]

Hi,

I have a 8290XL double shuttling the 7 pin.
I have had the shuttle adjusted forward and back from the recommended adjustment.
I adjusted the back of the shuttle up and down from the recommended adjustment. I have had the shuttle completly off the machine checked to be square, it is.
But when I reinstalled the shuttle it does still sit crooked. The 7 pin side is back farther than the 10 pin side, but the Shuttle tubes are lined up with the Bin Stringers. The bin and shuttle are lined up good with the cups on the Table.
But still, double shuttles the 7 pin.
The only way I have been able to get it not to double shuttle the 7 is to put a spacer between the back of the bin and where the head of the pin is to keep the pin forward in the bin.
I guess I will try changing the 070 006 429 shuttle operating arm assy. Maybe its bent.

If anyone has any suggestions I would be more than glad to hear them.

It will run for awhile with no problems.
Then it will do it repeatedly. I have cleaned and powdered the cup liners.

[8270king]

Re: Double Shuttle the 7 pin

Redrill the 7 pin holder so the pin holder mounts so the pin holder mounts farther toward the rear of the machine.

I drill the hols so that the hole the bin strap is on is just beyond the end of the pin holder.....so I only use 2 nuts to secure the pinholder.

Jerry

[TheGMan143]

Re: Double Shuttle the 7 pin

Our old mechanic showed me a 'cheat' that works pretty good for keeping pins from standing up in the bin, and can also help prevent double-shuttle.

Hook a distributor belt tensioner spring actoss the tops of the rubber bin mounts, so the belly of the spring is along the pocket of the bin that's causing problems. As the pin falls into the bin pocket, the spring forces it to lay flat, and it keeps the head from flying up and allowing the pin above to fall through.

We've used it for years, mainly to align the pins a bit better or to get out of a double-shuttle jam so you wouldn't have to babysit the machine until it could be adjusted or repaired. Doesn't seem to cause any pinjam problems, either.

[Kat]

Re: Double Shuttle the 7 pin

Originally posted by kevin:
Hi,

I have a 8290XL double shuttling the 7 pin.
I have had the shuttle adjusted forward and back from the recommended adjustment.
I adjusted the back of the shuttle up and down from the recommended adjustment. I have had the shuttle completly off the machine checked to be square, it is.
But when I reinstalled the shuttle it does still sit crooked. The 7 pin side is back farther than the 10 pin side, but the Shuttle tubes are lined up with the Bin Stringers. The bin and shuttle are lined up good with the cups on the Table.
But still, double shuttles the 7 pin.
The only way I have been able to get it not to double shuttle the 7 is to put a spacer between the back of the bin and where the head of the pin is to keep the pin forward in the bin.
I guess I will try changing the 070 006 429 shuttle operating arm assy. Maybe its bent.

If anyone has any suggestions I would be more than glad to hear them.

It will run for awhile with no problems.
Then it will do it repeatedly. I have cleaned and powdered the cup liners.

<font size="2" face="Verdana, Helvetica, sans-serif">Caused by a twisted shuttle shaft (the silver one that crosses just in front of the head pin pocket). Since the drive of the shuttle is from one side it has a tendency to twist the shaft after some time...especially if the grease gets gummed up in the castings. More prevalent in older machines.
I'm currently in the process of replacing any twisted/tweaked shafts and doing away with the grease fittings on the hanger castings. Drilling small holes on the tops and using 30w oil in place of grease. I feel this will provide smoother shuttling since the grease won't be there to get gummed up.

To see if your shuttle shaft is tweaked:

Loosen the 3/8" bolt that mounts the shuttle to the actuator castings (coming from the shuttle shaft). You will see how far from center they are. Unfortunately you can't just reposition the actuator castings as they are keyed on the shuttle shaft.

[8270_Wang]

Re: Double Shuttle the 7 pin

Kevin

I agree with Jerry on this one. I have used his method on 10 lanes or so and it does work. No more problems with double shuttling on those lanes. Once you drill a few , drill a few more to keep handy incase a different lane starts doing it, then u can just put the jerry rigged ones on and you are ready to go.

Wang

[AMFDOCTOR]

Re: Double Shuttle the 7 pin

I've found that if you look at a lot of machines, even brand new ones, you'll see that the shuttle is always further back on the 7 pin side. A real simple way to fix this I've found is to do the following.
1. Remove the shuttle spring, so there is no tension on it.
2. Take the 10 pin side drive arm off the front shaft and shuttle, remove the key from the shaft. Put the arm beack on the shaft and shuttle, but do not tighten.
3. Take two pieces of 1" flat stock and put a right angle bend in each. Take these two pieces and clamp them to the BACK of the bin between the 7-8 and 9-10 area. Make sure that the metal extends far enough down so that when you push the shuttle forward it hits both pieces. Take a carpet drive belt tensioner spring and hook it to the shuttle and the 5 pin area so as to pull the shuttle against the two pieces of metal, just enough to hold it there.
4. Go back up to the loose arm and replace the jam nut on the stud with a stover one and tighten the sucker down TIGHT.
5. Remove the two pieces of metal and hook up the regular shuttle spring.
That's it. Now when the shuttle moves forward it will move square all the time. I've run shuttles set up like this for 8 or 9 years and have had only two come loose, used the regular jam nut on the stud. Once you set it you can forget it.

THE AMF DOCTOR
The doctor makes house calls.