20mm Oerlikon AA Gun

Rochdalian · 09-02-2010, 07:52 AM

Hi

I am a volunteer crew member on the museum ship HMAS Castlemaine which is located at Williamstown Australia.

We have a gun as described above which we intend to strip as it is painted up and seized up to the point where it mostly doesn't move.

Wondering if anyone can help in locating exploded drawings for this gun. It is a 1940's -1950's model.

Cheers

Bob

CL1 · 09-02-2010, 08:38 AM

Hello Bob
I see the photo is on wiki

An Oerlikon cannon on HMAS Castlemaine

I cant really add to it this chaps shows on wiki
Untitled Document he might have more info

Have you tried the Australian Navy directly for assistance.
Also im sure you have thought about it but any ref to stripping the gun could also be taken as bringing it back on line as a live weapon.

Best of luck and hopefully another member here will be able to add .

handtohand22 · 09-02-2010, 09:14 AM

20 MM ANTIAIRCRAFT GUN - OP 911

See page 151 on stripping etc.

People have asked me in the past about the 40mm Bofors Gun Manual. There are copies of the different Mks here on the same site.

Navy Documents

slaphead · 09-02-2010, 09:57 AM

Wow Hand to hand, cracking site. I'm supposed to be working but finding the plans for the USS Saratoga and so on is brilliant..!

Rochdalian · 09-02-2010, 10:05 AM

Thanks CL1 yes that is our gun in the photo. And Handtohand that is a great site and although the model is slightly different we should be able to get enough info to allow us to do what we want thanks.

Cheers

Bob

51highland · 09-02-2010, 11:10 AM

We'll mark that up as yet another success story.!!!

beeza · 09-02-2010, 11:13 AM

Well Bob, you know the old navy story - If it moves, salute it, if it doesn't move walk
around it, and if you can't do that paint it. Obviously the latter took place.
David

peterhastie · 09-02-2010, 11:33 AM

As far as I can remember the barrel change was fairly straight forward.
Im not sure but I seem to recall a tool was required to compress the barrel springs if they where removed and replaced. The manual mentions the barrel spring compression but not how to obtain it. I'd be carefull taking it to bits, if you aint got the tool to put it back together.

peterhastie · 09-02-2010, 01:37 PM

This forum post may be of some help

20mm Oerlikon Disassembly [Archive] - Gunboard's Forums

Rochdalian · 10-02-2010, 09:31 AM

Yes thanks everybody, it is another success story.

Spot on David, one can of grey paint and a big brush and very little thought and there you have - protected from rust!!! We have another problem very similar - all the pipes throughout the ship are painted white - a major job for next winter I think!!

Thanks Peter but we don't intend to strip the barrel at this time, just remove it until we get everything else moving but we will be consulting that post.

Cheers

Bob

09-02-2010, 07:52 AM	#1 (permalink)
Rochdalian Junior Member Join Date: Feb 2010 Location: Melbourne Posts: 7	20mm Oerlikon AA Gun Hi I am a volunteer crew member on the museum ship HMAS Castlemaine which is located at Williamstown Australia. We have a gun as described above which we intend to strip as it is painted up and seized up to the point where it mostly doesn't move. Wondering if anyone can help in locating exploded drawings for this gun. It is a 1940's -1950's model. Cheers Bob

09-02-2010, 09:14 AM	#3 (permalink)
handtohand22 Senior Member Join Date: Feb 2005 Location: Coleraine Co. Londonderry NI Posts: 446	20 MM ANTIAIRCRAFT GUN - OP 911 See page 151 on stripping etc. People have asked me in the past about the 40mm Bofors Gun Manual. There are copies of the different Mks here on the same site. Navy Documents Last edited by handtohand22; 09-02-2010 at 10:15 AM. Reason: Additions

09-02-2010, 11:10 AM	#6 (permalink)
51highland Very Senior Member Join Date: Mar 2006 Location: Ipswich Posts: 1,296	We'll mark that up as yet another success story.!!! __________________ 51 highland "Don't leave me Sarge" & Keep 'em Moving Là á Bhlàir's math na Càirdean (Friends are good in the day of battle) Na diobair caraid's a charraid (Forsake not a friend in the fray) Cuimhnichibh na suinn nach maireann . Mairidh an cliu beo gu brath. (In memory of the Heroes who are no more. May their Fame live on forever)

09-02-2010, 11:33 AM	#8 (permalink)
peterhastie Senior Member Join Date: Nov 2007 Location: Newcastle Upon Tyne Posts: 170	As far as I can remember the barrel change was fairly straight forward. Im not sure but I seem to recall a tool was required to compress the barrel springs if they where removed and replaced. The manual mentions the barrel spring compression but not how to obtain it. I'd be carefull taking it to bits, if you aint got the tool to put it back together. Last edited by peterhastie; 09-02-2010 at 12:01 PM.

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09-02-2010, 08:38 AM	#2 (permalink)
CL1 . Join Date: Oct 2009 Posts: 2,146	Hello Bob I see the photo is on wiki An Oerlikon cannon on HMAS Castlemaine I cant really add to it this chaps shows on wiki Untitled Document he might have more info Have you tried the Australian Navy directly for assistance. Also im sure you have thought about it but any ref to stripping the gun could also be taken as bringing it back on line as a live weapon. Best of luck and hopefully another member here will be able to add .

09-02-2010, 09:57 AM	#4 (permalink)
slaphead Senior Member Join Date: Oct 2009 Location: Oxfordshire Posts: 577	Wow Hand to hand, cracking site. I'm supposed to be working but finding the plans for the USS Saratoga and so on is brilliant..!

09-02-2010, 10:05 AM	#5 (permalink)
Rochdalian Junior Member Join Date: Feb 2010 Location: Melbourne Posts: 7	Thanks CL1 yes that is our gun in the photo. And Handtohand that is a great site and although the model is slightly different we should be able to get enough info to allow us to do what we want thanks. Cheers Bob

09-02-2010, 11:13 AM	#7 (permalink)
beeza Senior Member Join Date: Jun 2009 Location: Oz Posts: 121	Well Bob, you know the old navy story - If it moves, salute it, if it doesn't move walk around it, and if you can't do that paint it. Obviously the latter took place. David

09-02-2010, 01:37 PM	#9 (permalink)
peterhastie Senior Member Join Date: Nov 2007 Location: Newcastle Upon Tyne Posts: 170	This forum post may be of some help 20mm Oerlikon Disassembly [Archive] - Gunboard's Forums

10-02-2010, 09:31 AM	#10 (permalink)
Rochdalian Junior Member Join Date: Feb 2010 Location: Melbourne Posts: 7	Yes thanks everybody, it is another success story. Spot on David, one can of grey paint and a big brush and very little thought and there you have - protected from rust!!! We have another problem very similar - all the pipes throughout the ship are painted white - a major job for next winter I think!! Thanks Peter but we don't intend to strip the barrel at this time, just remove it until we get everything else moving but we will be consulting that post. Cheers Bob

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