[Mark Korda]

Hi, I am restoring my AR-XA turntable. I needed a new motor as mine was making a lot of noise. I finally found one, the Hurst 3001-001. Here's a quick tip for you ARsters. The girl on the phone at Hurst said there are 2 left! 69 bucks with shipping included. My question to you guys and gals is how to get the spindle or pulley off and on, the old and new motors with out risking too much damage. I know I might have to make some new holes and buy a cap or so. I don't know if a new spindle comes with the motor, probably not, so I'll have to remove the one I got. My motor makes a lot of noise but looking at the spindle while it is running shows perfect symetrics. With everything on and running, belt and platters, it makes less noise but tells me that something must be well worn inside the motor. Its like my 2002 Ford Focus. It makes a racket when driving in a strait line but purrs like a Rolls Royce when I take a corner! Thanks for any help in advance....sincerely....Mark Korda (kordamark@gmail.com)

[Wayner]

First, the Hurst motor will come with the correct start capacitor.
Second, the motor shaft is .125 diameter and will fit your AR pulley.
Third, if you plan on running a Grado, the motor's magnetic field is way stronger then the Haydon motor and there will be hum.

When installing the pulley, you must hold the shaft on the lowest part, to prevent damaging or moving the Hurst motor bearing. Use a small needle nose plyer. If the pulley goes on too tight, you may need a machine shop to run a slightly larger reamer thru the pulley. If that is the case, then you should bring both the motor and the pulley with.

'ner

[Wayner]

Also, a little 3 in 1 machine oil may be of great help for the Haydon motor......

[Mark Korda]

Hi Wayne, thanks for the info. I should of tried the oil trick before I ordered the new motor. But, after spending forever tracking one down, I think I saved myself 200 dollars, which would have ended my project by not ordering from Vinyl Nirvana. I went right to Hurst and it couldn't have been easier.
   Wayne, when I looked at the arm wiring underneath it was all soldered perfectly. It looked like Dr. Christian Bernard did the wiring. I'm taking the easy way out and I got some male RCA gold plugs from Parts Express for cheap and will put those on the patch cord. The AVA mod will follow.
    All I've had thru the years are Grados, on the cheaper side. Wayne, what do you suggest? And remember I'm not in the club of the gents using thousand dollar cartridges crafted by Professor Turu Tanaka. Thanks Wayner....Mark K.

[Bob in St. Louis]

WARNING:
I say this as "a car guy", my theory is unproven on turntables, but works great when pressing the wrist pin of a piston onto a connecting rod.

You can put the shaft in the freezer, and heat the bearing (don't get crazy).
When pressing them together, take them from their temperature controlled environments and quickly press them together.
When they've cooled, they're inseparable.

I see no reason why this wouldn't work for this use, I've just never seen this 'trick' done for turntables.

Hope that helps,
Bob

[Wayner]

The ID of the pulley should be about .125" and the O.D. of the shaft is suppose to be .1249 +/- .0001. So that basically means if the shaft is on the high side and the pulley is on the low side, there could be an interference fit. Your suggestion may work, but I would skip the heating the shaft part.

Mark will not know until his motor arrives.

[Mark Korda]

Hi Wayne and Bob,
    Thanks for your help. Wayne, I asked the question about the pulley removal because I thought the pulley was threaded on the motor spindle. I saw a You Tube video and this guy just pulled the pulley strait up using 2 fingers on each side. That way worked fine. The pulley shaft is split and acts like a drywall anchor plastic bolt when fitted over the spindle, its made to expand to be snug to the spindle.
   Bob, I got your idea so I tried it in an experiment on a jar of salsa Andre the Giant couldn't have opened. Well kind of reversed, I heated the top and wala!......Thanks you guys....Mark.

[Bob in St. Louis]

You're welcome Mark.
I'm equally qualified to install pistons in your car, and open jars of salsa. The parallels are quite amazing actually.

Bob

[Mark Korda]

Hi Wayner, I tried the 3 in 1 oil on the Hayden motor already installed in my AR-XA. It  has worked remarkably well! My new Hurst motor might have to wait for installation it worked so well. I'm just trying to let the oil seep into the spindle shaft. There is a brass washer surrounding the shaft. If that could be removed I think even more oil would penetrate and make the motor even better. In your experience can that washer be taken off and put back on. It's not impinged by any thing and looks like it should be able to but I want to check with someone in the know before I screw it up....thanks so much for sharing your know how...Mark.

[Wayner]

That is a bushing for the motor shaft....leave it alone.

[Mark Korda]

Hi Wayne, thanks I'll leave the bushing alone. I hate to bug you but I have another question and anyone else too.
   Now my motor after being lubed up is almost silent. There is a strange thing that I must explain because it does not seem normal. When I switch off the turntable, the motor, with the pulley off and touch the motor shaft I can feel small pulses of electricity. Nothing shocking but about 2 per second even though the switch takes the motor out of the circuit. Could this mean the capacitor needs replacement? Would a faulty cap be the problem or a does that sound like a ground problem. Nothings hooked up yet and the both platter pieces are off. Thanks so much....Mark.

[Wayner]

The switch capacitor is across the contacts of the switch (its used to suppress on/off transient "pops") and does pass a little bit of current to the motor. So when the unit is plugged in, and you turn the motor by hand, you "feel the poles" of the motor. If you would unplug the table from the wall outlet, that feeling of the motor basically goes away.

Everything is normal.

[Mark Korda]

Hey Wayner...your the best!
      I don't know who else could have answered that but Edgar Villchur himself,God rest his soul. The only thing left is to shop for a reasonable priced cartridge that will fit nicely in the new headshell without any drilling or sawing. I understand your job is to produce and modify a cartridge that you said before might produce hum with an AR-XA and I appreciate that.
    So if anyone else is reading this, or it won't get you in trouble Wayne, I still need some ideas on what to get for a cartridge...thanks again...Mark.

[Wayner]

A Grado will work with the Haydon motor, it most likely will hum with the Hurst.

[orthobiz]

And remember I'm not in the club of the gents using thousand dollar cartridges crafted by Professor Turu Tanaka. Thanks Wayner....Mark K.

LMAO! The Tanaka cartridge would have ceremonial salt in it anyway!

Paul

[Mark Korda]

Hi, Grado it is....thanks Wayne........Oh and Ortho, Professor Turu Tanaka will be away this Xmas at a training dojo with his family mastering some martial arts. In his absence his tag team partner Mr. Fuji will be heading up cartridge installations....Mark.

[Mark Korda]

Wayne,  Merry Xmas!...Your help on this AR project has made a real nice present for me. The table keeps looking better with every step.
   I noticed something when practicing stripping the wire near the 2 RCA plugs I cut off from the AR patch cord, which I'm practicing so I can make the best possible connection with the newer gold platers. Between the left and right wires is one in the middle which has to be the ground. My old Technics SL-20 has a separate ground wire, and I got hum if not connected.
   Noticing you had put new RCA jacks mounted on the back wooden base I was wondering if you did use a ground wire. The one on my stock cord seems to be terminated into the plastic housing of the left RCA plugs ground.
   So I was wondering why one new motor, the Hurst hums with a Grado, and the old stock Hayden doesn't. Could the Hurst be not grounded with fancy new cables coming out of the new jacks on your table?
   I got the Hurst in the mail very quickly and it seems so rugged you could stick it in your car and make it go. The build quality looks like its worth every penny. Could induction have anything to do with the hum since the Hurst is a lot more massive?
   Thanks a lot Wayne!........Mark K.
   

[Wayner]

My ground is attached to the left shield on the RCA jack.