[TheForge] Bull Hammer??

Mon Apr 12 23:58:00 2004

As you mentioned, I have seen where WD-40 will cause swelling of rubber
seals. Additionally many of the automatic transmission "quick fixes" use
various solvents to swell worn out seals, so they seal again for a short
time.

Seems like swelled seals are sticking, although I have no power hammer
experience, this is similar to other types of systems.

Mike McKim

----- Original Message ----- 
From: "GHS" <[email protected]>
To: <[email protected]>
Sent: Monday, April 12, 2004 10:48 PM
Subject: Re: [TheForge] Bull Hammer??

>   I hope that this helps.
>
>  From the Bull 90 Maintenance Manual.
>
>
> Air cylinder control valves:
> The air supply to the hammer must provide a continuous mist of oil not
> heavier than SAE 10W non-detergent lubricating oil, to provide
> lubrication to the air cylinder and main control valves. Straight SAE 10
> W non-detergent motor oil is excellent for this purpose, provided it
> does not contain detergents, additives, etc. DO NOT USE ANY TYPE OF
> SYNTHETIC OIL, MARVEL MYSTERY OIL, OR WD-40 AS LUBRICANTS IN THE AIR
> SUPPLY. Proper attention to these lubrication requirements will prevent
> many difficulties....
>
> Mike Graf
>
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