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Lubrication for a 1921AC


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#1 poihths

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Posted 17 June 2018 - 09:31 PM

What's the proper lubrication routine for the 1921AC? What type, applied where, how much, how often? Just want to give my new baby all the TLC it needs.
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#2 michaelkih

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Posted 17 June 2018 - 09:55 PM

After a recommendation from a member here, I now use G96 on all of my MGs.


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#3 ppgcowboy

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Posted 17 June 2018 - 09:57 PM

I think mobile1 synthetic was also discussed for the oil pads.

Edited by ppgcowboy, 17 June 2018 - 10:01 PM.

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#4 gijive

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Posted 18 June 2018 - 07:36 AM

Clenzoil is excellent, as well.

 

https://www.clenzoil.com/endorsements/


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#5 Uncle Dudley

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Posted 18 June 2018 - 07:49 AM

Attached File  sperm whale oil.jpg   81.99K   10 downloads


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#6 john

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Posted 18 June 2018 - 10:27 PM

Used CLP for years - always put too much in the gun. I don't mind it spraying out the buffer when I fire it and when it stops spraying on my safety glasses I know it's in need of a couple more squirts
I put it on the barrel find too....when it starts to smoke (a couple drum dumps) it's time to let it cool off!
More oil is more mess but less wear.
Heard Mobil 1 is good too, but might want to pick a lighter weight, like 0W-20?
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#7 potterj

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Posted 19 June 2018 - 10:27 AM

Does anyone use/like LSA for their 21ac's?
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#8 Tiz

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Posted 19 June 2018 - 01:52 PM

After reading the original post by our new member, poihths, no one seams to be answering his questions other than what oil then prefer. Myself being new, I can't help much but I wish I could. The only thing I can add with regards to oil is something a machinist once told me. Motor oil is just that, it is for motors. There are oils that contain specific additives and are formulated with certain properties for specific applications, motor oil is for one specific application, motors, it is not a universal lubricant. 


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#9 bug

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Posted 19 June 2018 - 03:12 PM

The gun will run dry. Pretty much any lubricating oil can be used and it will help reduce wear. I don't know if AOC or the military issued a spec for proper TSMG lube but that would be a good starting place. As for me, I use light turbine oil  because that's what I have. A better question might be what NOT to use.

 

Bob D


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#10 MrBill

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Posted 19 June 2018 - 05:34 PM

At the recent Cheyenne Wells shoot...Jerrry...who had a cache of various machine guns for rent...Thompsons,BAR, Siaga 12guage, AK47 etc. used Rem Oil in the aerosol can (alot), each gun in some pretty miserable weather and had no lube problems whatsoever. I witnessed several Thompson 50 round mag dumps that cycled like they should. This could be worth a try?       


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#11 lightguy

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Posted 19 June 2018 - 11:50 PM

Does anyone use/like LSA for their 21ac's?

 
I'm using it in a M1 and pretty much everything else. I use Gibbs as a penetrant where needed. 
LSA in quart cans can be bought for peanuts at gun shows.
I like LSA because it acts as a nice preservative as well.
Good enough for money-is-no-object Uncle Sam good enough for me.

Edited by lightguy, 19 June 2018 - 11:53 PM.

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#12 Merry Ploughboy

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Posted 20 June 2018 - 02:18 PM

I follow the process in Basic Field Manual FM 23-40, 1949, Section III, para. 10-11, Care and Cleaning.  While directed to the 1928A1, I believe it to be applicable to the 1921 AC also.

 

Best of luck with whatever you pursue, and enjoy many happy times with your TSMG.


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#13 poihths

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Posted 26 June 2018 - 11:31 AM

Thanks, everybody! On followup with Merry Plowboy's suggestion, I happened across a "collectible" copy of the manual that includes the "Changes No. 1" booklet. The price for the package is $45. Does that sound like a fair deal?


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#14 john

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Posted 26 June 2018 - 03:10 PM

I believe that a few drops in each pad, about enough to keep the bolt "slightly wet" would suffice.
I've always said that there's no such thing as too much oil when it comes to expensive guns BUT....too much will lend to saturated wood furniture. On GI guns with reasonably priced wood available it's not a problem but as Colt wood is hard to locate and much more $$, I'd say that would be up to the owner. If I owned a Colt I'd Have GI wood on it and GI internals, and I'd oil it til it dripped!
I've put thousands of rounds through my subguns with very little visible wear to finished surfaces inside.

Have several booklets, USGI, Brit, etc. But never really looked at lube requirements.
I do know that when my guns start to run dry they all audibly slow down.
HTH.

john

Edited by john, 26 June 2018 - 03:16 PM.

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#15 Tiz

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Posted 27 June 2018 - 08:47 AM

I believe that a few drops in each pad, about enough to keep the bolt "slightly wet" would suffice.
I've always said that there's no such thing as too much oil when it comes to expensive guns BUT....too much will lend to saturated wood furniture. On GI guns with reasonably priced wood available it's not a problem but as Colt wood is hard to locate and much more $$, I'd say that would be up to the owner. If I owned a Colt I'd Have GI wood on it and GI internals, and I'd oil it til it dripped!
I've put thousands of rounds through my subguns with very little visible wear to finished surfaces inside.

Have several booklets, USGI, Brit, etc. But never really looked at lube requirements.
I do know that when my guns start to run dry they all audibly slow down.
HTH.

john

Now that is helpful information to the original  poster.


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#16 poihths

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Posted 28 June 2018 - 01:32 PM

So what are the more important lube points? On the lube pads, obviously, and where else? By the way, do the lube -ads wear out and need to be replaced?
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#17 gijive

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Posted 28 June 2018 - 02:12 PM

So what are the more important lube points? On the lube pads, obviously, and where else? By the way, do the lube -ads wear out and need to be replaced?

Anywhere you would lubricate any firearm.  Trigger, firing pin and springs, moving parts, etc.


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#18 ppgcowboy

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Posted 28 June 2018 - 02:44 PM

Hope this helps.

Attached Files


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