Despite what some collectors will tell you,vintage plunger-fillerscan be successfully repaired-- though not by means of the stiff rubber plugs some jam into the barrel as a quick "fix".
When it comes to repairing an old packing unit (or shaft seal, if you prefer), there are really only two acceptable approaches: to repack it with alternating disks of rubber and grease-impregnated felt, aswas done originally; or to install one of these modern fluorocarbon rubber gaskets, rated for an estimated lifetime from 4 to 10 times that of conventional rubber. With an occasional application of a bit of pure silicone grease to the plunger shaft, your plunger-filler's shaft sealshould hold up for years, if not decades.
To install, open up your pen and drill out the original packing from the inside, using a 1/4" drill to open up the closure washer and a flat-ended scraping tool (a sharpened screwdriver will serve) to clear away the rubber and felt bits inside.After inserting the new gasket, reclosethe packing chamberwith one of the included hard plasticwashers (solvent cement will providea secure bond).
FREE long-necked solvent cement applicator with each order!
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More on plunger-fillershere, with more detailed discussion of repair techniques and options here.
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