[AT] PTO pump on ebay

[John Wilkens]

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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                    In the wide-open spaces of NE Oregon