Jump to content


Temperature sensitive lube?


  • Please log in to reply
11 replies to this topic

#1 kwaispro727

kwaispro727

    Specialist

  • Members
  • PipPipPip
  • 970 posts
  • Gender:Male
  • Location:New Jersey
  • Interests:Fishing, swimming, airsoft, real firearms, cars
  • Country:

Posted 23 February 2014 - 09:03 AM

I've been having some jamming issues with my LM4.  Yesterday was a real pain.  Like 3 BBs got cracked and stuck around where the bolt connects with the hop up.  I actually had to strip the gun completely to clear it.  While I was at it I also dropped my barrel like an idiot and bent the hop-up housing.  But I was using the RA tech one so i just put the stock one in and it's fine now.  I also replaced the bucking because it tore a bit from the BB shards.

Up until now I've been completely clueless as to why sometimes it's fine and sometimes it fails miserably.  I've posted on here once or twice about it and you guys seem to be stumped as well.  I've tried everything.  I've reverted all the internals back to stock, rocket valve included.  I've switched them all back to my mods again.  Now I have a stock hop-up assembly, an RA-tech barrel, and a modded valve.

But yesterday, I had been standing out in the snow a good 5 minutes.  After I cleared the jam, I went out and dumped a mag in full auto to make sure the gun functioned properly.  It was perfectly fine. I just went out and shot, the gun wasn't subjected to the cold for even 30 seconds.

Could the lubricant be freezing?  If it gets to thick, wouldn't it screw up the whole bolt assembly essentially?  It's the only thing I can come up with this point...

#2 General Pickle

General Pickle

    Specialist

  • Members
  • PipPipPip
  • 313 posts
  • Gender:Male
  • Location:Oregon
  • Interests:tactical stuffs(airsoft, real steel, knives etc.), mechanical and manufacturing engineering, computers, gaming, the great outdoors
  • Country:

Posted 23 February 2014 - 12:00 PM

Have you tried doing the 'o-ring' mod on the barrel/hop housing?



#3 netpoc

netpoc

    Enthusiast

  • Members
  • PipPip
  • 185 posts
  • Gender:Male
  • Location:Central Coast, CA
  • Country:

Posted 23 February 2014 - 05:52 PM

What bb's are you using?

#4 kwaispro727

kwaispro727

    Specialist

  • Members
  • PipPipPip
  • 970 posts
  • Gender:Male
  • Location:New Jersey
  • Interests:Fishing, swimming, airsoft, real firearms, cars
  • Country:

Posted 24 February 2014 - 07:01 AM

I refuse to run anything besides KSC/KWA/Bioval BBs in my GBBs.  I'm more flexible with my AEGs.  I haven't tried that mod, though I've looked into it.  Do you really think it's just movement of the inner barrel assembly?

#5 netpoc

netpoc

    Enthusiast

  • Members
  • PipPip
  • 185 posts
  • Gender:Male
  • Location:Central Coast, CA
  • Country:

Posted 24 February 2014 - 07:44 AM

If you're using high quality bbs, then yes, your best bet is to do the mod.

#6 BeachEMT

BeachEMT

    Specialist

  • Members
  • PipPipPip
  • 534 posts
  • Gender:Male
  • Location:People's Republic of California
  • Interests:Engineering, Emergency Medicine
  • Country:

Posted 24 February 2014 - 08:47 AM

What lube are you using? Most lubes become more viscous at lower temps.

#7 kwaispro727

kwaispro727

    Specialist

  • Members
  • PipPipPip
  • 970 posts
  • Gender:Male
  • Location:New Jersey
  • Interests:Fishing, swimming, airsoft, real firearms, cars
  • Country:

Posted 25 February 2014 - 02:00 PM

Just the stuff that I've received with my other KWA GBBs.  I was a little surprised the LM4 didn't come with any.

#8 BeachEMT

BeachEMT

    Specialist

  • Members
  • PipPipPip
  • 534 posts
  • Gender:Male
  • Location:People's Republic of California
  • Interests:Engineering, Emergency Medicine
  • Country:

Posted 26 February 2014 - 12:43 AM

Yeah silicone oil could definitely be a factor. I've had great luck with FrogLube liquid. The real key is to only apply a very thin coating. You shouldn't be able to see the lube but it should feel a little "wet".

#9 Chuck S

Chuck S

    Guru

  • Members
  • PipPipPipPip
  • 1,320 posts
  • Gender:Male
  • Location:Cleveland, Ohio
  • Country:

Posted 26 February 2014 - 04:00 AM

You only need to smear a little lubrication on the wear points, the points that are getting shiny.

I had the multiple BBs and cracked BBs on my LM4 when new and sent it to KWA for warranty repair.  Hasn't repeated in a year.  I have a KM-Head barrel sitting here to install in the gun but haven't done it yet as it's working too well as is.  I'll probably do O-ring mod while I have the barrel out.  When I do it.

-- Chuck

#10 BeachEMT

BeachEMT

    Specialist

  • Members
  • PipPipPip
  • 534 posts
  • Gender:Male
  • Location:People's Republic of California
  • Interests:Engineering, Emergency Medicine
  • Country:

Posted 26 February 2014 - 09:46 AM

If my memory serves, wasn't it decided that a 5/16" e-clip was the perfered option over an o-ring?

#11 netpoc

netpoc

    Enthusiast

  • Members
  • PipPip
  • 185 posts
  • Gender:Male
  • Location:Central Coast, CA
  • Country:

Posted 26 February 2014 - 08:16 PM

Yes, I found that my original idea of an o-ring, in my case, failed and I replaced it with a c-clip. I did try an e-clip, but there is not enough room in the outer barrel cavity for it to work. I used a 5/16" c-clip. I'm sure the equivalent size metric c-clip would also work, or if you have another c-clip from the hopup assembly.
I have done this mod to 8 LM4's and it works fantastic.

Edited by netpoc, 26 February 2014 - 08:24 PM.


#12 kwaispro727

kwaispro727

    Specialist

  • Members
  • PipPipPip
  • 970 posts
  • Gender:Male
  • Location:New Jersey
  • Interests:Fishing, swimming, airsoft, real firearms, cars
  • Country:

Posted 03 March 2014 - 06:41 AM

I'm going to try the frog lube before doing the barrel mod.  If nothing comes of it, then I'll do it :)




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users