VPI-HW19 first model
Just got this turntable out of estate sales. Has original Sumiko MMT arm on.
The owner stated he changed motor 2 years ago and it's Hurst 600rpm motor.
My issue there: This motor is LOUD and it's clearly heard through the record surface. This motor seems to be a stepped synchronous motor. I tried to damp this motor mount bracket with silicone gasket and it still transfers too much vibrations onto the platter and arm boards. The original owner also supplied me with original motor that is still functional.
Tried to contact VPI -- no luck/no response after numerous e-mails (are they still around or gone?)
Tried to contact Hurst -- no working phone or e-mail listed on their site.
I've seen cases of the HW-19's motor pulley actually contacting it's plastic motor cover plate (ie: washers not installed on the three posts first, per instructions / chassis suspension springs relaxed / pulley installed too high on shaft). Sometimes: that clearance is so tight, the weight of a vinyl will be enough to close it.
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@dill This TT has sorbothane suspension pads @boothroyd , Previous owner received this upgraded capacitor with new motor 2 years ago. Regardless when motor is on you can turn plinth into rapid vibrator. The noise is MECHANICAL and it's typical to most of the stepped synchronous motors that aren't any good for turntables on the first place. |
Having the fact that I actually have the original motor from late 80's early 90's, brings me to an idea to try to recondition it. It spins when voltage applied at proper terminals through the OG starting cap. I have an access to unlock the c-clip holding the shaft on the top portion of motor. I can also see some lubrication drops through the bottom of the motor when bottom cap is off. |
With the output shaft clip removed along with the bottom friction-fit cover removed, just push the output shaft into the motor housing and remove from the bottom of the motor. Identical to the top washer/bushing, you’ll find a matching washer/bushing at the base. A good solvent cleaning and removal of grease will allow you to check its conditions including shaft wear. If OK, reload with a good synthetic grease such as Royal Purple® Ultra-Performance Grease and reassemble 👍 Setting the in/out output shaft play is very easy during reassembly if you have the VPI output shaft collar w/set-screw. Just a perceptible amount of play is perfect. Experience rebuilding these has clearly shown that the motors NOT coupled to an absorbent metal are more likely to be worn beyond repair to due over temperature wear. Mechanically coupling these Hurst motors is imperative to optimal performance. |
