Motor nose end adjuster screw & Arm Mechanism

[decanterlime]

Hello Y'all, can someone advise me on two issues I have. On servicing a GL75 motor I have noticed that the nose end screw the little internal plate inside is stuck half way dow the screw tube and will not budge no matter what I do. How can I dislodge it? Or where do I get a new one from? I have the Omnidrive precision engineering supply book but cannot find anything similar to this screw. Also I am puzzled with another anomoly I have never come accross before..the idler wheel is being drawn back so high up it is catching the rim of the top plate on the LHS of the motor recess in the top plate viewed from the front. Also the Idler wheel arm is being raised much higher than my other 2 Lenco's and this is something I have never twiddled with before

[richard]

Let me name that little plate "the plunger." (It may have a different "official" name.) I had two motors apart recently, and I found that the two plungers weren't quite identical. It seems normal for it to sit a little recessed in the hollow screw. There's a spring under it. Logically, it should be lightly lubed. I had a hell of a time getting them out, and I can't recall how I did it.

Anyone?

[mfrench]

magnet?

[decanterlime]

Ricardo I did steep this plunger screw in machine oil for a couple of days and still it is stuck fast midway the screw tube and is solid alas. A replacement seems in order I think or another micro spring and plate?

[ropie]

the idler wheel is being drawn back so high up it is catching the rim of the top plate on the LHS of the motor recess in the top plate viewed from the front.

Have you experimented with the idler arm spring tension?

[rfgumby]

A tiny ball bearing can be used instead of the plunger and flat plate.  I think Win mentioned he had tried it a while back.

[richard]

On the ones I had apart, there was no plate; just the plunger, which I'd describe as a two-diameter dowel. Now that you've mentioned this, Scott, a ball bearing seems perfect, perhaps even better. Now, how this guy can get his out of the tube: that's the question. (Decanter: what's your name?)

[GP49]

The only other chemical solution I can think of is butyl cellosolve, an excellent penetrant.  It is the active ingredient in PB Blaster, a commercial penetrating oil product.

Applying heat to the area using a BIG soldering iron or a soldering gun might help, too.

[audioneurotica]

For stuck metal parts a 50%50% mix of acetone and automatic transmission fluid is far superior to PB blaster, Kroil, WD40, or any of the other commercially available "nut busters." Someone with way too much time on his hands posted all the torques necessary to loosen rusted bolts with all the solutions available and the 50/50 mix required way less force to bust the rusted nuts loose. I've used it myself on some rusted muffler bolts that should have broken before they came loose but it worked. Hope this helps, William

[richard]

Believe it or not, my problem was not that these parts were stuck together. The problem is simply that this is the normal position of the plunger: recessed a bit inside the hollow adjustment screw. I finally got them out using some really simple, sensible way. Something like flushing them out with a blast of alcohol, or pulling them out with a very tiny piece of adhesive. I wish that I could remember. Nothing holds these parts in place aside from the motor shaft.

[odey]

Here's how one of mine looks like



I remember soaking it with WD-40 then tapping the opposite end
with a tool then it poped out.

Mosin did mention using a 2mm ball to replace a worn plunger.

Other possibilities for the stuck plunger I would think of are either a deformed plunger tip or a deformed cylinder opening of the nose screw due to excessive tightening and contact with the motor shaft end.

[richard]

Yeah: that's it. That's what was inside my motors. My problem was simply how to reach into the tube and grab onto the suckers.

[decanterlime]

Hello all and thanks for all you kind advice. My name behind the decanterlime nown is Mark and I reside in Stockton on Tees in England. I originally come from Robin Hood's part of the World in England namely Nottingham. I have lived in the North of England now and love it. I was first introduced to the marque Lenco in 2001 by a chap who dabbled in 2nd hand Hi Fi also named Mark and I'd never heard of the brand before.Someone at where I worked wanted a Garrard 301 and I purchased this Lenco off mark as an alternative to supply this work collegue for £10 hoping to pass it on for a much higher price. It was a GL78 chassis only with template and in mint condition and never used although a little dusty and scuffed. The work chap did not want it. When I studied this machine in my leisure I was fascinated with it. You know all the design, its mechanisms, its weight, the magnitude of it when the turret spun just how it seemed compared to my 2 wimpish Dual CS505's I'd previously had. I'd never even knew also there was such an enthusiastic lot of Lenco appreciatives spanning the entire world. Also the deck spooked me a bit because I wondered what kind of chap would own such a monster like that! Certainly not a chap like me who grew up in a council area of a provincial city? Anyway with folly I sold the deck to buy a teak cassette deck and regretted it bigtime! A few years passed and I tapped in Lenco on google and was astonished to find all the information with different clubs etc. In 2007 I purchased my first GL75 and it is wonderful. When I felt brave enough I decided to change the arm etc. I knew of Rega from DJ pals who swore by them fitted to Technics 1210's and researched all the tentative info of fitting them to Lenco's. I decided concertedly to just do it..relocate the arm portal..fill in all the holes and respray. When I commisioned my GL75 with the Rega RB250 fitted with a 1970's Shure M75 and played "Making Movies" Dire Straights I was staggered. STAGGERED!!! Now it is me who sells modified GL75's on UK ebay..not to make a profit as a main objective but let me tell you I would love to be an invisible entity in the customer's front room when he or she plays their first vinyl on the converted deck. I do not think it sacrilage too. I think the two brands should have been married years ago and perhaps we would not have this excessive flat digital sound? Now it seems quantity not quality? Nor do I want to sound like a grumpy old man! I love the GL75. To me its like a Contax or Leica RF camera..timeless, understated and totally inspirational and a great interest/hobby!! Another thing is I like talking with all you chaps because I know you share a passion. Its reciprocated! Thanks Lads!

[richard]

Thanks, Chris.
You've really put skin on those internet bones. Just put your "Chris" at the ends of your posts, please, becuse you see, I have a terrible, embarassing, memory for names.

You've reminded me that I ought to get around to hearing Dire Straits, because they used the same range of speakers that I do, for monitoring. At least that.

To me its like a Contax or Leica RF camera..timeless, understated and totally inspirational and a great interest/hobby!!

I think that the truth is that a great turntable can be made using any principle. It's the implementation that's what matters. Lencos aren't the world's greatest turntables. But they're great starting points for fettling-up good ones. In my lifetime, it's been a series of, "Hey: look at that?" And, "I never thought..."

And, maybe the way that I got that plug out of the hollow screw was with a tiny speck of double-sided adhesive tape. Something like that.

Contax, Leica (Alpa?),
I'm going to put my last four rolls of Kodachrome on eBay (that's the plan). This pains me because one of the conservatories where I studied was partially funded by money from Eastman Kodak. Kodachrome, the first successful color film, and in my mind, the absolute best of them, was invented by two young musicians: Leopold Goldowsky and Leopold Mannes. I went to The Mannes College of Music. It was a really small, and really excellent, music school. One day, I discussed a very difficult "industrial" issue with the dean: Leopold himself. In a hallway, there was a dye transfer print, a portrait of his father David, a renowned New York musician, before my time. Norman Pickering, of Pickering cartridges, was also a renowned New York violinist. Is there a connection between music and invention? Probably only in my head.

On the other hand, maybe I should hold back one box of the stuff and mount it in a frame.

Man, this hurts.

Welcome.

[decanterlime]

Hi Martin,

thanks for that suggestion and I will bear it in mind and I will try and source a supplier in Germany or perhaps you may be so kind to let me know of one please? The problem is not so pressing now as I did insert a steel ball bearing in the recess and tuned the motor in accordance with procedures and now a chap in Spain has the deck which he purchased off me through Gleebay. To be frank when i serviced the motor the green paint was still on the 3 holding nuts so the fault must have originated at point of production perhaps? An interesting anomoly though. and one I will have in mind with future projects. Mind you someone could have "monkeyed" the nose screw to death via the lazy way of doing it like you said. Please keep in touch Martin..nice conversing with you.

Regards,
Mark