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Instructions for tearing open a BT 99 Receiver?

Discussion in 'Shooting Related Threads' started by t7731, Dec 15, 2012.

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  1. t7731

    t7731 Member

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    I have my receiver out as I am sending my stock out for some work. I would like to tear it down to clean and lubricate everything while I have it out this far. I am a little concerned about just popping out pins, springs, etc. I know from working on motorcycles that most of these things need to be done in a certain order, especially when trying to put them back together. Anybody know where I can find some instructions on how to do this? Maybe instructions for replacing the firing pin would work?

    Thanks,

    Mike


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  2. Oregunner

    Oregunner Well-Known Member

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    No need to take it any further apart. Spray it out well with Brake Cleaner, then spray off with compressed air. Spray it with a CLP (I use Remoil), then spray off again with compressed air. It is now clean and lubed. Mark
     
  3. RWT

    RWT Well-Known Member

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    Mike,

    Don't take the assembly out with it in the fired position unless you have something to capture the parts.

    You can do a passable job of cleaning without any further dissassembly.

    Robert
     
  4. t7731

    t7731 Member

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    What about the cavity where the firing pin is? There are three holes that surround the firing pin that must get all kinds of gunk in them. In fact, I can stick a paper clip or a toothpick in there and pull out a little bit of goop. There must be a way to get in there to clean, isn't there?
     
  5. t7731

    t7731 Member

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    OK, I wont take it apart, even though I am really dying to do it for some sick reason. Should I really be spraying brake cleaner in there? Wouldn't some Breakfree CLP do the trick? I am also a little concerned about spraying compressed from my compressor in there because of condensation in the tank. Comments?
     
  6. wayneo

    wayneo Active Member

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    You need a special spanner wrench to take the firing pin bushing out. You also need the Bt-99 Field Service Manual, click the link. Then you will need three hands to get the hammer spring, sleeve, and guide back in place. Assuming you didn't launch it across the room removing it.

    What Mark said is good info. If it's not broke, don't fix it.

    Wayne
     
  7. Oregunner

    Oregunner Well-Known Member

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    The three holes are for a special tool to remove the bushing that holds the firing pin in. Think of the receiver like a motorcycle chain. Clean it good by spraying or soaking it, Then dry it out well and lube it lightly. Gun Scrubber is just expensive brake cleaner. Keep it away from wood and certain plastics. I use my compressor for this all the time, but I do have a moisture trap in line. Mark
     
  8. slayer

    slayer Well-Known Member

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    Mike, sometimes you have to fight that urge to take it apart. I think that this is one of those times. jmho Bill
     
  9. t7731

    t7731 Member

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    I know, I know. I just like knowing how everything works. That being said, I have found myself, more than once in the past, wishing I didn't take things apart. I will leave it alone until something breaks. That probably wont be for a long time since I just got the gun this summer and it only has about 4,000 rounds through it.
     
  10. Bernie K

    Bernie K Member

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    The bt is about the easest to take down. The hardest part is putting the locking lug lever spring back in. It's a bear.
     
  11. grntitan

    grntitan Well-Known Member

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    I use my air compressor all the time when cleaning my guns. All you have to do is soak it down with spray lube like Rem Oil or Barricade after using the compressor. The spray lube will displace any moisture that the compressor might have blown in. WD 40 is actually designed for this task although I would then follow with a good spray lube as WD 40 isn't the best choice for gun lube. Drain your compressor tank before doing this and that should remove most from your system.
     
  12. Straight50

    Straight50 Member

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    From the pictures you posted and the stated age of your Bt, I would use the good advice from several posters above and spray clean it, blow it out and relube it. BTW, if you are concerned about your compressor, buy yourself a couple cans of compressed air at the computor store and use it.
    On another, but similar note, I too like to tinker and have satisfied that urge by buying and rebuilding a few well used old BT99's over the past few years. Aside from a couple of specialty tools you can buy or make, all you need is simple hand tools and a couple of punchs. Its fun and sometimes you can make a buck or two, especially if you can reblue the metal and refinish the wood yourself.
    Have fun!
     
  13. grunt

    grunt TS Supporters TS Supporters

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    Use canned air. Like you use to clean your electronics..
     
  14. Bvr Tail

    Bvr Tail Well-Known Member

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    Use the compressor!

    If you have that much moisture in the air system, I'll bet any air operated tool or sprayer you have is corrupted!

    Good Luck
     
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