John Halter | 1 Feb 02:57 2005

New Air Hammer Problem

Hello Everyone,

I am having a problem with my Cuturi E air hammer.  It has not stopped 
completely (which I normally fix with the standard bump against my wood 
stand), but it is not traveling a full piston stroke.  It is making plenty 
of noise as the air travels through it.  It vibrates and will carve a small 
surface amount through this vibration, but as soon as I put any pressure 
against the chisel it binds and stops working.  I can push the chisel into 
the air hammer by hand and stop it without much pressure.

I have taken the barrel apart, cleaned the piston and barrel interior with 
kerosene, put back together, and reoiled with no improvement.  Does anyone 
have any idea as to what may be happening and how to fix it?  Are there any 
O-rings or gaskets in these tools which wear out?

Thank you,
John Halter
halter@...

 
Simon Brown | 1 Feb 10:05 2005
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Re: New Air Hammer Problem

as soon as I put any pressure against the chisel it binds and stops working
Does anyone have any idea as to what may be happening and how to fix it?

John,

Sometimes an air bottle can get gummed up with residue in the fine air 
ducts through the casing. I leave my tool soak in a mineral solvent bath,
periodically checking to see if it has freed up, then I re-lube it with 
air tool oil.

Not sure of the details of the solvent, other than that it is made 
by Caltex. Automotive supply shop may be a source, it's really just 
extra heavy-duty degreaser.

Failing that, get your tool to a specialist air tool repair shop.

Simon

 
George Graham | 1 Feb 16:06 2005
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Re: New Air Hammer Problem

John,
I was taught to leave uncooperative air hammers in a bucket of kerosene and 
oil over night to clean off any oil and dust residue. then use only air 
hammer oil , repeatedly to get it working freely.
Check your tool to see if it has unscrewed its self. If it has opened up 
just a little, the air flow can be all messed up. I've only had it happen 
once and it just about drove me nuts.
Simon's advice do have the hammer looked at by an expert is as usual , right 
on the mark.
George Graham

 
gabriel drueke | 1 Feb 16:49 2005
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Re: New Air Hammer Problem

Hi John,

Recently had the same problem with an air hammer only I was unable to get
mine apart to clean. Sending to the manufacturer is your best bet for a
proper cleaning and to rule out faulty manufacturing or loss of temper. I
was informed that standard air tool oil (which I knew better than to use but
did anyway) tends to gum quickly causing the problem that you describe.
Trow & Holden recommend a lightweight spindle oil (10  weight?) Most
automotive stores will point you in the right direction. Another thing that
has seemed to help me is an in-line filter that collects condensation and
small particles that may give your hammer a cold. Hope this helps

Gabe

--

-- 

http://www.wishstone.net

on 1/31/05 7:57 PM, John Halter at halter@... wrote:

> Hello Everyone,
> 
> I am having a problem with my Cuturi E air hammer.  It has not stopped
> completely (which I normally fix with the standard bump against my wood
> stand),

Simon Brown | 2 Feb 12:05 2005
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Re: New Air Hammer Problem

unable to get mine apart to clean

Gabriel,

Don't know what breed your air bottle is, but ones I have used are held together
with a brass shear pin. That is, a pin that needs to be sheared off to get the
thing open.

Put the bottom of your tool in a vice, use a spanner around the top to snap the
pin and get it open. Replace the pin with a little piece of brass rod (brazing
rod is OK) when you put it together again.

What tool are you using?

We use Bon Accord: http://www.grampianpneumatics.co.uk/brochure.htm 

and Superior brand

Simon

 
John Halter | 2 Feb 19:12 2005

Re: New Air Hammer Problem

Hello,

I am using a Cuturi E type hammer.  I can take off the outer shell and 
remove the piston, but there also appears to be an inner shell controlling 
the flow of air through diverted holes that I cannot open.

Thank you,
John Halter
halter@...

 
Simon Brown | 3 Feb 21:14 2005
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Re: New Air Hammer Problem

I am using a Cuturi E type hammer.  I can take off the outer shell and 
> remove the piston, but there also appears to be an inner shell controlling 
> the flow of air through diverted holes that I cannot open.

Hi John,

Don't try to open the inner bits, just soak the whole tool (assembled) in a
small bucket of solvent until it runs smoothly. Using the correct air tool oil
(just a few drops) will prevent clagging up.

Simon

 
gabriel drueke | 4 Feb 16:47 2005
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Re: New Air Hammer Problem

on 2/2/05 5:05 AM, Simon Brown at moonsong@... wrote:
> 
> Don't know what breed your air bottle is, but ones I have used are held
> together
> with a brass shear pin. That is, a pin that needs to be sheared off to get the
> thing open.

Hi Simon,

I'm using a Trow & Holden hammer. I ended up sending the piece back to the
manufacturer for repair as soaking it for days proved futile. I rent a space
from a plumbing company and even with their wide array of wrenches, vises
and the bravado of some, eh-hem, large plumbers, we could not get the tool
apart. So, I'm not sure if the hammer has a shear pin. It would make sense
though. 

Anyone else out there ever take a Trow & Holden hammer apart?

I was pressing a deadline at the time and ended up having a new hammer
over-nighted. I'm now the proud father of TWO smoothly running air hammers.

Thank you again for your advice.

GABE

--

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http://www.wishstone.net

 
(Continue reading)

abknight | 4 Feb 17:54 2005
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Re: New Air Hammer Problem

Gabe,

I am not perhaps as mechanically inclined as you.  T and H
as serviced two of my hammers for similar complaints. 
Perhaps JVC would instruct me here on ethics in the matter
of discussing preferrences concerning tool and product
manufacturer's pricing and services.  In this case he will
only be able to do so after my compulsive act of
indiscretion: all service was provided free of charge.   I
can't help but think this might be useful information for
any who are tempted to disassemble their hammers.

Hopelessly indiscreet and in love with the list, ethically
challenged, end ever in confusion about what might be
helpful and what might be foolishness, I am

Bill

 

Gmane