Today when I wanted to flush M760, piston simply refused to move after half turn! So, I removed the nib-section and flushed! But the question is how to make that piston moving? Its not stuck. Its very very tight!
Can any one suggest please!
Thanks,
Abhik.

You can lubricate the piston using pure silicone grease -- DONOT USE ANYTHING WITH PETROLEUM IN IT! A very small quantity, spread around the barrel bore immediately adjacent to the piston, will allow you to run the piston down onto it. That should free up the piston; cycle it up and down several times to spread the grease uniformly.

You can get silicone grease from Pendemonium or Tryphon Enterprises.

You can also get pure silicone grease from a scuba diving shop.

I found silicone grease at Lowe's, listed as Plumber's Grease (I ensured no petroleum products inside).
Donnie

Thanks every for quick responses! I was about to make a mistake of putting 'white petroleum jelly'!!
Any way I have to look for 'silicone grease' within our CONTINENT! Ha ha.
Thanks again!
abhik.

Are you sure that's not actually polyglycol grease? I think that's what plumber's waterproof grease usually is, and as I mentioned in a recent thread, it seems to fill the requirements I mention below...


Maybe the scuba-supply angle would be the easiest?

I'm not sure that silicone grease, per se, is absolutely necessary. I think the most important aspects of a fountain pen grease are:
- That it's waterproof;
- That it doesn't contain any petroleum products, since these can attack plastic and rubber components;
- That it's chemically inert (doesn't want to form covalent bonds with anything else, including your pen and ink).

-- Brian

I have to interject here. Often times this subject comes up where leading restoration people suggest a product which has been shown not to harm pens as part of a routine repair. Every time someone says "try this, it's the same". I understand that some products may not be available locally and that one may have to wait to get what is the right tool or product for the job.

As a repair person for the last two years, I implicitly follow the suggestions of those who have "been there and done that" failed many times over and gained the experince required to suggest or point others to a specific product. Why reinvent the wheel. We live in a Global villiage, to borrow the words of a confederate, and the only reason that one should choose to use products or tools other than what is time tested is the lack of patience.

Patience is a true virtue with pen restoration. Short cuts will eventually come to bite you in the tail (insert more popular word for tail here).

Silicon Grease is just that, pure and simple. It is not plumbers grease, polyglycol grease, lithium grease, petroleum jelly, peanut butter, or any other greasy substance. If you cannot find it locally, and are posting on this board, buy it from any one of the known pen supply shops on line. If you don't know who they are, ask.

The only "need" to find an alternative is a fallacy derived from the lack of patience that it takes to wait for the product or tool to arrive in the mail.

Rant complete
SG

Ok I'll ask. Which pen supply shops sell silicon grease?

Disclaimer: I do not endorse these shops, and am not affiliated in any way.
As stated by Richard above and via a quick internet search:
Tryphon (Giovanni Abrate)
Pendemonium

I was sure that there were more in the pen vein but here are some scuba shops who sell it as well:
reefscuba.com
planetscuba.com
123scuba.com
mcnett.baron-co.com
salclear.com
diversdirect.com

etc
etc

Cheers,
Sean

Kind of like one of the irreducible four elements of the universe ? Actually, I think it's dimethicone oil (like the stuff in hand lotion) thickened with silica (plus Teflon, in Tryphon's grease).

I agree that there's usually no need to use something else, but there's nothing magical about silicone grease. It's just something that meets the requirements at hand.

-- Brian

Another place to look is pool supply shops. The gaskets for pool pumps require silicone grease, in many cases, to keep from being affected by the chlorine and salts.

I was being slightly glib about it. I do understand that Silicone grease is not on the Periodic table and is a compound. I was trying to point out that there is no reason to substitue, other than ones ill conceived notion that the repair HAS to be done RIGHT NOW. Patience is a good thing. Learn to embrace it, or learn how to make more complicated repairs on pens you have screwed up by not being patient.

I speak from experience here. There are alot of repairs that I know how to do now that I did not need to know when I first started. You break something because you were rammy, you had better learn how to fix it.

Cheers,
Sean

FWIW: Dow Corning makes/sells silicon grease in the pen repairer's life time supply sized tubes.