wurlitzer model 3100

ok cleaned backstops (my claws). however i just noticed something ( you may know this). the a1 playing now number is one past the l4 going left around the ring. if i am thinking right the backstops control which side the record is picked up from. if this is correct i would think the the backstop on one side (odd #'s) is misaligned. am i on the right track?

update. upon looking at the electric selector. when an odd number is selected the arm on the es runs to the correct pin, lowers down on the pin then lifts up and moves one more space. the even numbers, the es moves to the pin lowers down then back up and the correct record is played

Sounds like "back-stop problems", to me--for sure, if picking an "odd" side", results in the even side of the record directly across the basket, being played. Check that they are both clean, and dry FIRST. If not, then, clean/dry them. If so, check that one or more has not been "adjusted". --look for gray paint on them, which is what the factory used after adjusting properly---
NOTE: this adjustment ( like most others) does not "change", without "help", or something being "bent". If one, or more has been moved, you can try to re-position it using the "painted outline", but you will most likely need to "go by the book"---Ron Rich

ron, i also noticed that one of the stops makes a clicking sound when the record carrier is moved by hand but the other one does not make noise. from what i can tell of the stops one is straight and the other seems to have a very slight bend. the ends touching the record carrier.
i will check for the paint.

Both should "click"--I have heard them both sound "different", and still work---
Ron Rich

ron, one back stop was out by about 1/16th, one on the right looking from the back. i repositioned according to the paint. no change. it looks like the one on the right now has the correct depth on the index wheel. the one on the left to me looks like it is right on the edge. with my old eyes and cheatter glasses i really can't tell. will get the guy i work with to look tommorrow and see what he thinks. the index wheel looks to me like is has seen better days. worn down a bit so it might just need the left side adjusted. if i am looking at it correct the right side indexes the odd sides and the left the even sides. if this is true then the left side would be the one that is misadjusted. am i right in my analysis?

I don't recall for sure, but I think so--
Ron Rich

"rm" The backstop pawls nor the teeth in the carriage wear out. There isn't any real friction on these parts.

If you are having indexing errors the first thing to check is that the pin memory is properly aligned.
On the left side of the machine ( viewed from rear) there should be a drift pin in a clip right near the Palyrak. This is inserted in the shaft in the bottom center of the memory casting. It should be possible for it to slide all the way up to where it's "C" clip stops it. and ideally fall out when you remove you hand. In practice, there is always a slight misalignment present, but not enough to actually see the memory unit shift as the pin is removed.

If the pin won't insert fairly easily, slightly loosen the two bolts at the bottom of the memory nearest the front of the machine and the two at the top of the triangular piece at the rear and shift the memory around to get as close as possible to ideal alignment.

When restoring these machines I often removed the backstops during washing. When reassembling I manually bring the mech to the point where a lift arm enters a record slot and and then carefully set to position and depth of the backstop based on that. It requires a light and careful touch, but has always resulted in accurate alignment.

BTW: The pawl indexes the same side that lifts the record.

Rob/NYC

rob/nyc,

thanks for the info, however i need a little more info. i can not find anything in the manual that says it is the palyrak or playrack if you misspelled. can you explain what it is?

It is the "pricing unit" ("Playrac" in WurliTzer speak), which is located on the upper RH side of the cabinet, when dome is opened. The alignment tool Rob is talking about is usually mounted in a "fuse holder" type clip, behind the Playrac--you must look from the rear of the phono to find it----if, one of Rob's "Geppetto friends", has not "liberated" it !
Ron Rich

ron/rob-nyc

my pricing unit is mounted to the right side of the box at the rear. nothing is behind it as it is at the very back of the box. what is the memory casting?

The "memory casting" referred here: http://s1192.photobucket.com/user/Rob-N ... rt=2&o=114 in fig. 24 as "selector casting" is the cast metal bottom of the memory unit (the other parts are mostly stamped sheet metal). At the very center is the opening where the alignment tool is inserted to center the memory and mechanism assemblies.

here is another shot of the assembly: http://s1192.photobucket.com/user/Rob-N ... rt=2&o=115

Hover mouse over pic and press the 4th button to enlarge.

If the alignment tool is missing a Phillips screwdriver that fits snugly can be used.

Rob

rob-nyc,

thanks for the info. i was thinking that the memory unit is what you were speaking of. i regard myself as very good when it comes to mechanical things. but this has got me baffled. in your first post you told me to look for the drift pin in a clip and that it inserts into the center of the memory casting. unless i am not looking at the correct thing the center of the memory casting has a large shaft with a bar attached that hits the memory pins and extends up to the motor gear.

once again just to confirm, the indexing only occurs with the odd selections. i runs to the correct pin stops and the bar that hits the pins drops onto the pin then moves back up and rotates one move spot.

sorry for my misunderstanding of things but glad there are people like you and Ron that help. i know sometimes ya'll must get flustrated when someone does not see what is right in front of them. i have had the same thing happen to me.

once again thanks

Since it is only on one side, I don't believe it's an alignment problem with the ES--I still think it is a "back-stop" problem. I have seen back-stops that were damaged/bent, and of course incorrectly miss-adjusted. I have also seen a couple where "someone" has decided that the springs needed "adjusting", and/ or they have been replaced with stronger ones-- IMHO, none of the above ever works, for very long---Ron Rich

I tend to agree with Ron re: the backstop pawl. BUT it is important that the memory (electrical selector) be as closely aligned as possible before tampering with the backstops.

While these machines are not "critical" in setup, this particular area is prone to cumulative misalignment.

As for the tool used to center the memory, I can't t find a good pic of it in my old shop manual -only a partially obscured one. However, if you haven't found it by now, it may be gone. It might be on the floor of the machine. Otherwise, just use a Phillips screwdriver as I previously suggested and get it centered well enough.

Rob