Air Hammer Rebuilding/Servicing?

[Spudland_Dave]

Recently got an Atlas Copco RRN34P 7X air Hammer/Riveter... Got it off eBay, looks new, but works intermittently... By that I mean it seems to be gummed up/sticky, 75% of the time if i pull the trigger it just hisses air, if I give it a shake or two it usually "starts hammering", used to be much worse but I've been sticking the AeroKroil to it which has helped but its still not "perfect"...so I was thinking I should take it apart, clean things up and make her work like a sewing machine.

I've never taken one apart so I dont want to get in over my head...seems simple enough. I wasnt going to take it apart originally, but I found a set screw off the barrel which came out now I just want to go over everything.
I looked everywhere on the web...cant find out much about anything Atlas Copco...

I can tell you one thing...dang 7X air hammer kicks like a mule...I can feel it in my wrist as I type this..

 

[Spudland_Dave]

Followup...

Whats the consensus on oiling an air hammer...I've read multiple threads in the past week about some people swearing by NOT oiling it as that causes issues like I describe...other say oil early & often...

 

[Mohawk Dave]

I use TriFlo to loosen them up and frikin swear by it. That stuff cleans out gunk and makes stuff work again like nobodies business.

After that I just use some old Marvel Mystery Air Tool Oil I have.

I've taken air hammers apart. Not a whole lot to them. Go for it.

 

[jonjon1]

air hammers are tough, my snap-on hammer is always on, like the trigger is always pulled a little, I still oil it. I had an ir that was gummed up, sat in a drawer in my truck for about 5 years with out being used, So I ran some stuff we use in the bore hammers ($7K+ underground boring hammers used to shoot lines under driveways and streets), its made by a company called QMI, not sure where you can buy it online I get it at the local commercial supplier by the gallon, I think I am on the first batch I bought 10 years ago still... ANYWAY, it cleaned up that old air hammer and it worked great after, never tried it in my leaking so hammer..

 

[Olafur]

It probably needs cleaning and lubing, I would tear it apart right away.

You could try to contact Atlas Copco USA if you need parts - see links below.

Sometimes it's good to have some pics for support, I can't find your model on AC website (older model?) , but here are the rivet guns:
http://www.atlascopco.us/usus/products/material-removal-tools/1469793/

This gun looks similar:
http://www.atlascopco.us/usus/products/material-removal-tools/1495123/1496747

If you select "service" and then "product instructions" you get 88 page .pdf file with load of BS but it includes part list and exploded view on page 86
http://servaidweb.atlascopco.com/Se...&searchtechnicalupdateno=&pdftype=instruction

Here is another model, possibly smaller version of what you have. RRN11P
Page 51 has exp. view ..
http://servaidweb.atlascopco.com/Se...&searchtechnicalupdateno=&pdftype=instruction

 

[Olafur]

Service kit:
http://www.aircentertools.com/Catalog/ProductView?IID=130728

 

[Spudland_Dave]

If you select "service" and then "product instructions" you get 88 page .pdf file with load of BS but it includes part list and exploded view on page 86
http://servaidweb.atlascopco.com/Se...&searchtechnicalupdateno=&pdftype=instruction

Thanks Olafur...I actually already had the only manual I could find for it:
http://servaidweb.atlascopco.com/ServAid/jsp/Frameset.jsp?action=initsearch&searchtype=pdf&searchproductno=8425020621&searchtechnicaldate=&searchtechnicalupdateno=&pdftype=instruction

Basically just an owners manual...88 pages but only a couple are English and even then, just common sense knowledge.

Right now the biggest thing I'd like to know...on the Barrel is a set screw which came out...I want to know...do I tight it down, just put it flush...whats it do? whats it for?

It does look simple enough...I think I will just take it apart and wash everything out. The ONLY mention of disassembly in the manual is:

Dismantling and reassembly
The riveting hammer is of a simple design and has
only a few parts. This makes for easy dismantling
and reassembly, but attention should nevertheless be
paid to the following instructions:
1) In dismantling and assembling, always secure the
riveting hammer vertically around the cylinder to
facilitate removal and fitting of the main valve
assembly.
2) Before disassembling the screwed connection
between the handle and the cylinder, the locking
pin must be removed.
3) When reassembling the said threaded connection,
the tightening torque must be 80-110 Nm (60-80
ftlb).
Important! Holes and drilled passages for the
locking pin are made according to a vernier scale.
If the stipulated torque, 80-110 Nm (60-80 ftlb),
has been applied but no hole for the locking pin
is uncovered, the back head must not be unscrewed
but must be tightened further until a hole
is uncovered and the locking pin can be pressed
into it.
4) Before assembly it should be checked that all main
valve parts are free from burrs and well cleaned.
5) Lubricate all parts with a small amount of oil before
reassembling.

I use TriFlo to loosen them up and frikin swear by it. That stuff cleans out gunk and makes stuff work again like nobodies business.

Good to know, I've never heard of the stuff so I looked it up, looks like its just Kerosene with other oils added in...before committing to taking mine apart, I'll try running some Kero/Diesel thru mine to see what happens...

 

[sberry]

I have a couple of "good ones" sitting around waiting to be fixed, in the mean time bought a China one that works.

 

[stikman56]

I've found most of the time they just need a good cleaning. Also have had good luck pushing the piston/hammer back down with some oil in from the business end and pulling the trigger it will come out again and usually stop, repeat as needed and many times, with enough liquid in there, it will clean itself out and keep running.

 

[zkling]

I'd start by running some MMO and then a good air tool oil through it.

 

[Ponchoguy]

Followup...

Whats the consensus on oiling an air hammer...I've read multiple threads in the past week about some people swearing by NOT oiling it as that causes issues like I describe...other say oil early & often...

I found a Snap On PTR700G in the snow about 15 years ago. I cleaned it up and reoiled it, good as new.

I have a SO air hammer sitting next to me that needs attention. That's next...