[AT] Stuck clutch JD 60

[charlie hill]

I agree Rupert and I should have explained better.  IF I were going to use 
air I'd fill the cyl completely full of oil and come out of the spark plug 
hole with pressure hose or pipe up above the top of the cyl.  Then I'd put a 
valve on guage and valve on the line.    There would only be a small area 
left open for air and the air would be applied slowly, building up pressure 
to a safe level and then valved off from the compressor.  Remember you can't 
compress a fluid so even with the grease gun there has to be some air, an 
expanding rubber line or constant mechanical pressure on the system all the 
time or it will do just as you said and loose it's pressure immediately.  By 
putting the air in above the oil level and keeping the volume of air low 
compared to the cylinder (oil) volume there shouldn't be any problems.  At 
least that's how I see it.

Charlie

--------------------------------------------------
From: "Rupert" <rwenig2 at xplornet.com>
Sent: Wednesday, July 07, 2010 6:08 PM
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Subject: Re: [AT] Stuck clutch JD 60

> hello Charlie,
> I wouldn't use compressed air as the piston can become a missile if it
> moves suddenly as the air decompresses. Besides the decompressing air
> would spread the oil all over the place.
> I would think the hydraulic pressure would have to be higher than
> combustion pressure to hurt anything. Hydraulic pressure will drop
> almost instantly when the piston starts to move.
>
> Rupert
>
> On 7/7/2010 11:04 AM, charlie hill wrote:
>> Oil would be better anyway because if you used grease it would need to be
>> cleaned out of the head and upper cylinder.   An oil transfer pump of 
>> some
>> sort or an old furnace pump might even work better.  As long as the 
>> pressure
>> didn't exceed normal cylinder pressure it shouldn't hurt anything.   For
>> that matter you could fill the cyl. with oil and put air pressure on top 
>> of
>> it as long as the air input port was above the top of the cylinder.
>>
>> Charlie
>>
>> --------------------------------------------------
>> From: "Len Rugen"<rugenl at yahoo.com>
>> Sent: Wednesday, July 07, 2010 12:47 PM
>> To: "Antique tractor email discussion 
>> group"<at at lists.antique-tractor.com>
>> Subject: Re: [AT] Stuck clutch JD 60
>>
>>> A good grease gun will pump used motor oil.....  messy, but for your
>>> needs, it might work.
>>>
>>> (It's an old Smokey Unick trick, from PM years ago, how to unclog a oil
>>> port in a head w/o tearing the motor down)
>>>
>>> On 7/7/2010 11:03 AM, Rupert wrote:
>>>> That would take a pail of grease to fill one of those cylinders. Just a
>>>> thought but would it work filling the cylinder first with oil and then
>>>> using a grease gun to build up the pressure? Inquiring mind wants to
>>>> know as I have two small engines that have stuck pistons.
>>>>
>>>> Rupert
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>
> -- 
>
> yvt
>
> Rupert Wenig
> Camrose, Alberta, Canada.
>
> email: rwenig2 at xplornet.com
>
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