firing pin assembly - The Firearms Forum

confederatemule · 04-06-2012, 05:51 AM

I just bought an old Iver Johnson top break revolver. t is a second model, 5th variation. Not real sure bout the variation. It could be 5th, 6th, or 7th. The pat. info, on the bottom of the grip butt is wore off.
Now, for my question.
How do I remove the firing pin? Where can I buy one. I think it needs the spring replaced. If I can get the pin assembly out, I hope to be able to replace the spring only.

Thanks for any help.

gvw3 · 04-06-2012, 07:54 AM

If anyone has these parts they do...

http://www.gunpartscorp.com/catalog/...son&catid=3870

Numrick

confederatemule · 04-06-2012, 11:46 AM

They don't.
Thanks for the reply.

StoneChimney · 04-06-2012, 03:08 PM

Don't have a representative piece in the shop right now, but if I remember correctly those guns used a bushing in the breech face to hold the firing pin and spring in the frame.

confederatemule · 04-06-2012, 03:16 PM

StoneChimney, best as I can tell by looking in B. Goforth's book, you are correct. I assume that it screws out. I am pretty sure there was a special tool for that job, that had pins that stuck into the holes, on each side of the firing pin. I don't have the tool, but I have used punches to do similar tasks down through the years. One punch in each hole and a bar, of some sort, between the punches and twist.

45Auto · 04-06-2012, 03:18 PM

The pin is held in by a threaded bushing in the breach face. You will need to make a special screw driver to fit the two pin holes in the bushing. It may be necessary to drench it in Kroil for a week before trying to unscrew it. At times it's been necessary to heat the breach face with a torch before being able to unscrew it.

The .22 caliber small frame IJ brake top used a cross pin to hold in the firing pin.

The firing pin return spring is a short coil spring made of rather thin wire. They are often crushed or broken from long years of dry firing. It may be possible to make one by cutting a section from some other thin wire coil spring.

confederatemule · 04-06-2012, 03:23 PM

Quote:

Originally Posted by 45Auto

The pin is held in by a threaded bushing in the breach face. You will need to make a special screw driver to fit the two pin holes in the bushing. It may be necessary to drench it in Kroil for a week before trying to unscrew it. At times it's been necessary to heat the breach face with a torch before being able to unscrew it.

The .22 caliber small frame IJ brake top used a cross pin to hold in the firing pin.

The firing pin return spring is a short coil spring made of rather thin wire. They are often crushed or broken from long years of dry firing. It may be possible to make one by cutting a section from some other thin wire coil spring.

45Auto, thanks for your help. That is sorta what I thought.

Jim K · 04-06-2012, 04:20 PM

Sometimes those bushings are very difficult to remove since the breech face was machined after the bushing was installed. While the technique used by confederatemule will work sometimes, I think making or buying the tool would be a better approach.

JIm

confederatemule · 04-06-2012, 04:54 PM

Where, in the world, would a person buy the correct tool?

Jim K · 04-06-2012, 05:20 PM

Try Brownells, Firing Pin Bushing Tool, Stock # 590-017-002AC. It is adjustable to fit most FP bushings. Use it with a small box wrench and a rod through the barrel for pressure. Cost is around $28.

Jim

confederatemule · 04-06-2012, 09:48 PM

Jim, THANKS. I'll "have" one next week.

Mule

confederatemule · 04-12-2012, 07:37 PM

Quote:

Originally Posted by Jim K

Try Brownells, Firing Pin Bushing Tool, Stock # 590-017-002AC. It is adjustable to fit most FP bushings. Use it with a small box wrench and a rod through the barrel for pressure. Cost is around $28.

Jim

I ordered the adjustable 2 pin tool. Got it today. It won't do the job. The pins are too large for the holes in the bushing and, also, the pins will not adjust close enough to fit. If the pin width was correct I would make the holes the correct size. Just my luck.

Hammerslagger · 04-12-2012, 07:50 PM

It looks like you are going to have to make a tool.

Not that big a job if you have a drill press and a Dremel tool with cut off wheels. You can use the shank of an appropriate size twist drill to make the pins which can be soldered into and held by a handle fashioned from low carbon steel.

Good luck.

confederatemule · 04-12-2012, 08:29 PM

I'll call Brownells before I try to make one. They may know of a source for the correct tool.
If not, I will try my luck at making one. I do have a drill press and Dremel tool with cut off wheels.

Thanks, Hammerslagger, for the suggestion.

04-06-2012, 05:51 AM	#1
confederatemule V.I.P. Member Join Date: Apr 2009 Location: Oklahoma, Arkansas, Louisiana, corner of Texas Contributor Posts: 112	firing pin assembly I just bought an old Iver Johnson top break revolver. t is a second model, 5th variation. Not real sure bout the variation. It could be 5th, 6th, or 7th. The pat. info, on the bottom of the grip butt is wore off. Now, for my question. How do I remove the firing pin? Where can I buy one. I think it needs the spring replaced. If I can get the pin assembly out, I hope to be able to replace the spring only. Thanks for any help. --> Last edited by confederatemule; 04-06-2012 at 05:52 AM..

04-06-2012, 07:54 AM	#2
gvw3 Advanced Senior Member Join Date: Oct 2011 Location: Chicago IL Area Contributor Posts: 3,287	Re: firing pin assembly If anyone has these parts they do... http://www.gunpartscorp.com/catalog/...son&catid=3870 Numrick __________________ Criminals advocate stronger gun laws to foster a safer work environment. This limits their exposure to risk.

04-06-2012, 11:46 AM	#3
confederatemule V.I.P. Member Join Date: Apr 2009 Location: Oklahoma, Arkansas, Louisiana, corner of Texas Contributor Posts: 112	Re: firing pin assembly They don't. Thanks for the reply.

04-06-2012, 03:08 PM	#4
StoneChimney Advanced Senior Member Join Date: Nov 2010 Posts: 1,087	Re: firing pin assembly Don't have a representative piece in the shop right now, but if I remember correctly those guns used a bushing in the breech face to hold the firing pin and spring in the frame. __________________ Full service gunsmithing and firearm manufacturing shop. Licensed FFL 07/02 Manufacturer. Visit our website!

04-06-2012, 03:16 PM	#5
confederatemule V.I.P. Member Join Date: Apr 2009 Location: Oklahoma, Arkansas, Louisiana, corner of Texas Contributor Posts: 112	Re: firing pin assembly StoneChimney, best as I can tell by looking in B. Goforth's book, you are correct. I assume that it screws out. I am pretty sure there was a special tool for that job, that had pins that stuck into the holes, on each side of the firing pin. I don't have the tool, but I have used punches to do similar tasks down through the years. One punch in each hole and a bar, of some sort, between the punches and twist.

04-06-2012, 03:18 PM	#6
45Auto Advanced Senior Member Join Date: Apr 2008 Posts: 1,119	Re: firing pin assembly The pin is held in by a threaded bushing in the breach face. You will need to make a special screw driver to fit the two pin holes in the bushing. It may be necessary to drench it in Kroil for a week before trying to unscrew it. At times it's been necessary to heat the breach face with a torch before being able to unscrew it. The .22 caliber small frame IJ brake top used a cross pin to hold in the firing pin. The firing pin return spring is a short coil spring made of rather thin wire. They are often crushed or broken from long years of dry firing. It may be possible to make one by cutting a section from some other thin wire coil spring.

04-06-2012, 04:20 PM	#8
Jim K Advanced Senior Member Join Date: Dec 2009 Posts: 6,408	Re: firing pin assembly Sometimes those bushings are very difficult to remove since the breech face was machined after the bushing was installed. While the technique used by confederatemule will work sometimes, I think making or buying the tool would be a better approach. JIm

04-06-2012, 04:54 PM	#9
confederatemule V.I.P. Member Join Date: Apr 2009 Location: Oklahoma, Arkansas, Louisiana, corner of Texas Contributor Posts: 112	Re: firing pin assembly Where, in the world, would a person buy the correct tool?

04-06-2012, 05:20 PM	#10
Jim K Advanced Senior Member Join Date: Dec 2009 Posts: 6,408	Re: firing pin assembly Try Brownells, Firing Pin Bushing Tool, Stock # 590-017-002AC. It is adjustable to fit most FP bushings. Use it with a small box wrench and a rod through the barrel for pressure. Cost is around $28. Jim

04-06-2012, 09:48 PM	#11
confederatemule V.I.P. Member Join Date: Apr 2009 Location: Oklahoma, Arkansas, Louisiana, corner of Texas Contributor Posts: 112	Re: firing pin assembly Jim, THANKS. I'll "have" one next week. Mule

04-12-2012, 07:50 PM	#13
Hammerslagger Advanced Senior Member Join Date: Jul 2009 Posts: 1,099	Re: firing pin assembly It looks like you are going to have to make a tool. Not that big a job if you have a drill press and a Dremel tool with cut off wheels. You can use the shank of an appropriate size twist drill to make the pins which can be soldered into and held by a handle fashioned from low carbon steel. Good luck.

04-12-2012, 08:29 PM	#14
confederatemule V.I.P. Member Join Date: Apr 2009 Location: Oklahoma, Arkansas, Louisiana, corner of Texas Contributor Posts: 112	Re: firing pin assembly I'll call Brownells before I try to make one. They may know of a source for the correct tool. If not, I will try my luck at making one. I do have a drill press and Dremel tool with cut off wheels. Thanks, Hammerslagger, for the suggestion.