VPI-HW19 first model

@boothroyd 

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.

While the mechanical aspects of the motor are critical, don’t underestimate the electrical performance!

Jan @ VPI did a fair amount of practical research into the vibrational performance of various motor capacitors. The newer high voltage caps are readily available and highly recommended if you’re NOT using an external controller such as their SDS which can “cog” the motor when line voltages are lowered. (Line level voltages are essential for properly conveying Pace, Rhythm and Timing on high mass systems IMO.)

I just tested it with old cap hard wired to see if it’s spinning before actually starting disassembly.

I’ll try to see if this old motor with the new cap after some surgical clean-up and lube will run better than newer one.

Will put myself onto test on how good or lousy am I by trying to make from crap a cake. :-)

Best of luck! You’ve got nothing to loose 👍

To emphasize the importance of mechanical grounding, press an edge of the motor frame against something of mass such as the top of your work table with it turning. Feel what happens when the vibration can drain off 😳