[AT] PTO pump on ebay
John Wilkens
jwilkens at eoni.com
Tue Jan 2 18:26:39 PST 2007
John, this string is typical of how difficult it is sometimes to
describe a mechanical thing in written descriptions without the air
of photos or drawings--or face to face converstaions so everyone gets
the same picture! I tried but failed big time...again! Anyway, I
think the problem, is solved since I just purchased two complete
"vintage" spark plug hole tire inflaters with hoses, gauges adapters
and the valves for $9.99 (I was the only bidder). These both have
the 1 or 2-way valve that will fit the spark plug hole that I was
looking for. I might need to make an adapter. In my case these
valves (one) can screw into the head of the pump to replace the valve
that is missing. They will screw into the head of the pump and stick
up a couple inches. That's what I remember seeing years ago on a pto
pump....but it was not a JD pump. The ebay JD pto pump looks like it
just has a short pipe screwed into the top of the JD pump
head/cylinder with a hose clamped to it. I've never seen one of
these JD pumps so maybe there is a 1-way valve screwed down into the
cylinder that you can't see in the ebay photo. I suspect the valve
is missing and someone just screwed the pipe in the pump to try to
get it to work?. Here's the part that I still cannot
figure: assuming there is a spring-loaded ball valve in the top of
the valve to prevent pressurized air in the hose from returning to
the pump on the down stroke, where does the recharge air come from
that needs to flow into the pump on the down stroke? And if there is
another air passage between the "spring loaded ball valve" to allow
recharge air in the pump how is THAT air passage closed off so air
compressed on the up stroke doesn't just run out? Seems like there
would have to be two spring loaded ball valves. OK, I'm through! John W.
At 03:11 PM 01/02/2007, you wrote:
>John Wilkens. John, using the John Deere tire pump presently on
>e-Bay #110074738700, as an example. The valve keeping the air pumped
>in the object pumped up, tire, basket ball, etc, in in the end where
>the hose is hooked to. The "valve" in enclosed in the pipe plug
>valve assy which is inserted (screwed) into the pump body. When you
>say what you need is at the top of the pump, I don't understand what
>you are looking for. Most PTO pumps work off the same basic style.
>The only object that might be missing from this JD pump would be a
>cast iron Guard covering the end of the air piston and crank so that
>fingers and other body parts needed at one time or other don't
>accidentally get involved in the tire pump operation. (Ouch).
>I'm still not clear on what you need other than this valve set up.
>Regards, John Grant
>----- Original Message ----- From: "John Wilkens" <jwilkens at eoni.com>
>To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
>Sent: Tuesday, January 02, 2007 5:00 PM
>Subject: Re: [AT] PTO pump on ebay
>
>
>>Thanks Gene and DAve. Looks to me like the valve I need is missing
>>from the top of the pump. Maybe the JD versions had some other
>>arrangement. John W.
>>
>>
>>At 07:51 AM 01/02/2007, you wrote:
>>> There is a John Deere PTO air pump on ebay right now. Present
>>> bid is $20.00
>>>
>>> Item number 110074738700
>>>
>>> Gene
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>>
>>
>> In the wide-open spaces of NE Oregon
>>
>>
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