JVC Victor Counterweight Sag Repair (Tonearms UA-7045 and long version UA-7082)

Three allen head set screws (2 sizes) are involved. (presumably metric, however I bought a 1/16” size key that fit the pair in my arm post that retain the chrome collet).

Only One Repair Part Needed, size #00, ½” OD Beveled Rubber Washer. Note: Inside hole is 5mm diameter, presses onto 5mm diameter brass shaft shown below.

(everbuilt model 866210) (home depot sku 1006959446)

Concealed Brass Piece, 18mm overall length, 8.5mm diameter rubber shoulder fits inside the chrome metal collet, 5mm diameter brass shoulder, threads face the  counterweight.

ASSEMBLY

Three ‘joining’ pieces loosely pre-assembled.

 

a.       The concealed brass piece with threads facing the counterweight passes thru the chrome plated metal collet.

b.      The rubber washer beveled face presses into the collet and onto the 5mm diameter shaft of the brass piece.

c.       Thread the counterweight section very snugly onto the brass threads, compressing the beveled washer.

d.       ‘loosely tighten’ the single allen head set screw to retain the counterweight section’sposition. Note: the set screw must be ‘below’ the inner tube’s surface to allow the outer tube to pass over it during balancing/tracking weight setup.

e.       Insert into the post, tighten two allen head set screws onto the chrome collet

Note: The notches in the chrome collet face the arm post. The notches originally kept the brass piece from spinning when the counterweight is very snugly tightened onto it. IF it now spins for any reason, simply pre-assemble the counterweight ‘outside’ of the post (when able to grip it with a tool), lastly fasten the completed assembly into the post with the two allen head set screws.