Maintenance, Servicing and is Silicone Oil good or bad?

[max headroom]

sorry to bring this thread up again.

It says in my BSA instructions to put Molycote 111 on the fill probe o-rings. Should I put this on the o-ring of the pellet probe o-ring/cocking lever?

Chris

no problem with 111. its the oil that comes to the top of MS4. i had to work with it the grease will give you exzema. as will drybollick oil.

[Missed_dinner]

no problem with 111. its the oil that comes to the top of MS4. i had to work with it the grease will give you exzema. as will drybollick oil.

I think the stuff that the guy gave me when I bought my Ultra is MS4. I will have to have a look...

[max headroom]

I think the stuff that the guy gave me when I bought my Ultra is MS4. I will have to have a look...

have a good look. MS4 in a tube is sillycone grease. you only got the clear oil when it is stood for months. trust me, i worked with this for 14 years.
it went in ford cargo cab mounts. leyland sherpa anti roll bars. and some more. the good point, its heat proof. until one of our "engieers" takes an empty and sets about it with an angle grinder. no eyebrows. (we had some great "engineers")

[Barryg]

have a good look. MS4 in a tube is sillycone grease. you only got the clear oil when it is stood for months. trust me, i worked with this for 14 years.
it went in ford cargo cab mounts. leyland sherpa anti roll bars. and some more. the good point, its heat proof. until one of our "engieers" takes an empty and sets about it with an angle grinder. no eyebrows. (we had some great "engineers")

The letters MS on grease seem misleading while ms4 is silicone MS 2 is high pressure moly grease, what does ms stand for?

[bighit]

The letters MS on grease seem misleading while ms4 is silicone MS 2 is high pressure moly grease, what does ms stand for?

its now called dc4


Product Code: Dow Corning DC4 grease ( MS 4 ) - Electrical Comp
Dow Corning DC4 - EX MS4, Silicone grease electrical compound DC4 is a non melting, water proofing and insulating silicone compound for ignition systems, electronics equipment and block connector terminals

http://www.greyline.com/pdf/MSDS-DowCorning4.pdf



A non-melting, waterproofing and insulating silicone compound for ignition systems and electronic equipment. To specification MIL-59860-C.

Dow Corning DC4 is a dimethyl silicone compound for a variety of lubrication and protection applications. Uses of Dow Corning 4 Electrical Insulating Compound include:

Moisture-proof seal for aircraft, automotive and marine ignition systems and spark plug connections
Waterproof electrical connections
Electrical assemblies and terminals
Seal and lubricant for cable connectors, battery terminals, rubber door seals and rubber and plastic O-rings
Assembly lubricant for various metal-on-plastic and metal-on-rubber combinations
Lubrication for control and pressure plug valves

Features: Maintains serviceable consistency from -70 to 400°F (-57 to 204°C), Practically nonvolatile, Odourless, Resistant to a wide range of chemicals; generally resistant to mineral oils, vegetable oils, air, dilute acids, alkalines and most aqueous solutions, Moisture resistant, Electrically insulating, Excellent rubber lubrication, Excellent release and sealing properties, Resistant to oxidation, Essentially nontoxic and nonmelting, Show little tendency to dry out in service.

Dimethyl silicone is a polymer that acts as an anti-foaming agent and a propellant

[max headroom]

The letters MS on grease seem misleading while ms4 is silicone MS 2 is high pressure moly grease, what does ms stand for?

Molydebnrum Siicone.

[Barryg]

Molydebnrum Siicone.

Just looked it up it's molybdenum disulfide (MS2)
The S is missleading.

[Airsporter1st]

The letters MS on grease seem misleading while ms4 is silicone MS 2 is high pressure moly grease, what does ms stand for?

Whatever the manufacturers intended, which I doubt is molybdenum silicone or molybdenum disulphide (which would be MD, wouldn't it?

[Barryg]

Whatever the manufacturers intended, which I doubt is molybdenum silicone or molybdenum disulphide (which would be MD, wouldn't it?

Not really
http://cometoil.com/subPage.php?spageID=31&bankingID=6

[Airsporter1st]

Whatever the manufacturers intended, which I doubt is molybdenum silicone or molybdenum disulphide (which would be MD, wouldn't it?

Not really
http://cometoil.com/subPage.php?spageID=31&bankingID=6

I think you missed my point. We all know that that the chemical formula of molybdenum disulphide is MoS2, but just because a grease manufacturer calls a product 'MS something' does not necessarily mean that it contains molybdenum disulphide or anything else for that matter.

A grease cannot be pure molybdenum disulphide, because that is a powder, so even the so-called moly grease simply contains an often surprisingly small amount of MoS2 in a grease carrier.

If I was marketing a grease containing MoS2, I might just as well name it MD, for molybdenum disulphide, as anything else. Similarly, MS in the name might simply stand for 'more suckers' or 'makes sterling'. As I said, it stands for whatever the manufacturers want it to stand for and should not be taken as a reliable indication of content.