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Sheaffer Pfm V Not Filling.


sihumchai

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Hey everyone,

 

I know this has been asked many of times over the years, and I do not really suspect my issue is much more different than what others have come across, but I need some advice.

 

I purchased a PFM V awhile back, and have been gathering the tools and parts for renewing all the old seals/sacs. I have replaced the barrel O-ring without issue, I've also changed the point gasket holder. I also had to purchase an entirely new Snorkel Tube because the old one had been disfigured by the previous restorer (broken, and missing the inner feed). Sac had petrified into the sac protector, and I have managed to clean out all the gunk so a new sac would fit. I've refitted a new sac (dusted with graphite), snorkel tube (sans shellac).

 

Filler tube seems fine, but upon closer inspection, on the tail end of the filler (where the screw goes in) seems badly disfigured as well, probably due to the previous restorer ramming in the screwdriver, creating a few extra opening. I'm not sure if this could be major reason which it isn't creating vacuum, as I have also installed a new rubber washer (or spider washer as some say) for the screw, fashioned from an extra sac I had. I made it a bit larger in an attempt to cover up the holes.

 

My main issue is that it would not fill (I was hoping it would, after researching on many sites on PFM repair, even Oldfield's book). There is little to no vacuum created during the upstroke, and downstrokes, even trying the methods with wetting your thumb and sticking under the barrel, there is no suction at all.

 

I highly suspect a hairline crack, I wasn't being able to detect one, other than a few elongated scratches.

 

Any advice? I'm considering sending this to a professional for repairs.

 

(I'll post up pics tomorrow)

 

 

 

 

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Filler tube seems fine, but upon closer inspection, on the tail end of the filler (where the screw goes in) seems badly disfigured as well, probably due to the previous restorer ramming in the screwdriver, creating a few extra opening. I'm not sure if this could be major reason which it isn't creating vacuum, as I have also installed a new rubber washer (or spider washer as some say) for the screw, fashioned from an extra sac I had. I made it a bit larger in an attempt to cover up the holes.

 

My main issue is that it would not fill (I was hoping it would, after researching on many sites on PFM repair, even Oldfield's book). There is little to no vacuum created during the upstroke, and downstrokes, even trying the methods with wetting your thumb and sticking under the barrel, there is no suction at all...

 

******************************************************************************************************************

 

If I understand correctly, there are holes in the touchdown tube?

If so, it seems to me that the holes would prevent the pressurization on the downstroke that's required to compress the sac ergo nil filling.

 

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If I understand correctly, there are holes in the touchdown tube?

If so, it seems to me that the holes would prevent the pressurization on the downstroke that's required to compress the sac ergo nil filling.

 

 

Yes there are holes, probably prodded by a sharp philips screw-driver. Perhaps I could get someone to weld/solder the holes up?

 

I'll have some pictures by tomorrow, in the mean time, I guess I should get looking for parts.

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Hey all,

 

As an update, here's a picture of the filler tube.

 

I'm filling the holes up with metal epoxy. Further testing reveals that vacuum and hiss is indeed present after the holes were plugged. I put my thumb on the bottom of the barrel, and my index finger on the top of the filler tube without the blind cap and pressed down - the lovely hiss was there :)

 

I'll update if I was successful.

 

 

 

 

post-107607-0-84253200-1394347394_thumb.jpg

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