MRM Engraving




 

BEFORE DOING ANYTHING, DISCONNECT ELECTRICAL POWER & AIR SUPPLY.
Disclaimer: MRM Engraving is not affiliated in any way with GRS.
Also, user assumes ALL liability- MRM Engraving is NOT responsible for any injury or damage incurred in the use of this product.

 

Take off cover by removing the four screws located on bottom near rubber feet and slide cover off.

 


Note the position of the five lengths of tubing. This machine is a newer model that primarily utilizes barb fittings & spring clips, with only one of the internal fittings (to the throttle/foot pedal) still of the compression collar type. The frame brace has been removed for better clarity in the photo, but also facilitates access for maintenance. I recommend removing it before working on the tubing. When re-installing, note that its orientation mirrors the one on the opposite side. (Also note the cloudy, almost opaque amber color of the stiff, ozone-degraded tubing.)

 

This is a close-up of the internal compression fitting leading to the throttle. It is the same as those on the front panel of the machine for the handpieces & throttle.

 

Unscrew the brass retaining nut with a 7/16" wrench and slide it & the plastic collar off fitting and remove old tubing. Note: If tubing is severely deteriorated, it will probably break off inside fitting seat- that's okay.

 


The Clean-out Tool in action. The rubber protective cap has been moved to the other end for better grip & leverage. Please note that even the handpiece & throttle tubing can deteriorate, as well. I strongly recommend replacing ALL of this tubing & their plastic compression collars also.

 

See how the Clean-out Tool has removed the rotten tubing in two neat curls. No digging out crumbs of plastic with a graver!

 

If you're successful in removing the old tubing reasonably intact, it's easiest to just measure the lengths of new tubing from the old. Before installing the new tubing is a good time to clean the rotary valve, per manufacturer's instructions (http://www.grstools.com/PDF/004-041_MaxMateValveCleaning.pdf)

 

Close-up of new tubing showing proper order & orientation of plastic collar & retaining nut.

 

 

Refurbished unit with all new tubing & collars.

 

Disclaimer: MRM Engraving is not affiliated in any way with GRS.
Also, user assumes ALL liability- MRM Engraving is NOT responsible for any injury or damage incurred in the use of this product.

 

 

MITCHELL R. MOSCHETTI

352 Angeline Drive, Mills River, NC 28759

828-891-4305 • mitch@mrmengraving.com
custom knives & jewelry, hand engraving, hand engraver, jewelry engraving,
banknote, gun engraving, master engraver, master engraving, gravers, graver, platinum ring engraving, bulino engraving
, engraving school, engraving classes, hand engraving tools,
custom knife engraving, gun engraving, custom engraving, learn to engrave, engraving classes, engraving school, metal engraving tool, hand engraving tools, hand engraving for jewelers, learn hand engraving, engraving training classes, ring engraving, engraving supplies, hand engraver equipment, gravermax repair, gravermax tubing, gravermax maintenance, gravermax rehab, gravermax fix, gravermax refurbishing, gravermax lines, gravermax kit, gravermax, gold inlay, engraver handpieces, engraving handpieces, how to engrave, how-to engrave, cylinder blocks, engraving fixtures, engraving fixturing, jewelry fixtures, fixture blocks, fixturing blocks, jewelry fixtures, jewelry fixturing, Jett-Sett, Jett Sett, Thermo-loc, pitch blocks, engraver's pitch, burgundy pitch, chaser's cement, diamond setter's cement