I’ve been lurking for a while now but finally felt I had something worthwhile to post. I’ve been collecting pens (mostly Parkers) for a few years and recently decided to jump in a restore a few of them. I’ve restored a few of my Duofolds and Vac’s over the last year with the help of the generous contributions on this site as well as the many great pen resources on the web.
I recently acquired a Parker Senior Duovac and had it disassemble and cleaned when I noticed the pump spring was heavily corroded and had separated. Dang! What to do now? A bit more searching turned up a few sites with replacement springs and pellet cups for sale and the most common recommendation seemed to be that the existing pellet cup usually had to be cut off of the filler plunger in order to install a new spring as it is generally very difficult to remove the cup without damaging either the cup or the plunger shaft. Seemed a waste to destroy a perfectly good cup so I decided to see if I could come up with a pellet cup extractor.
The jig materials were some simple scrap from my wood shop – a piece of 2x4, a threaded eye bolt, the end of a drill bit and some copper sheet. I selected a drill bit with a diameter a few thousands smaller than the filler plunger diameter and used the bit to countersink a hole in the end of the eye bolt. I then cut a section off the shank of the same bit and inserted it into the drill hole to serve as the ram. I warmed the pellet cup up once mounted in the jig to 150 degrees for a few minutes monitored by a digital thermometer and then slowly turned the eye bolt and pushed the plunger shaft out the back of the pellet cup. No big issues except that one of the slot legs on the end of the plunger shaft was slightly bent over but I think that can be straightened with a little more heat with I reassemble.
So, my rough little jig seems to have worked at least on this first attempt. Anyone else used something similar with good results?
Is the pellet cup reattachment usually done with a dab of shellac?