Suggestions for gettuing most/all of grease out of hdn-pump gun? - MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information
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post #1 of 4 Old 10-22-2016, 05:53 PM Thread Starter
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Question Suggestions for gettuing most/all of grease out of hdn-pump gun?

Question here--something that's been vexing me forever--just never really thought it through..

How do you folks get most or all, of the grease pumped thru and out of a hand-operated gun? In my case, an older Stewart Warner pistol grip model....

Loses all 'pumping pressure' and still more than 1/2 full of grease...
I take it apart-pull the charge handle back and 'bleed it'--but never picks up a prime--for want of a better word.

Wasting a lot of grease here...

Any suggestions-folks?

glenn


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post #2 of 4 Old 10-22-2016, 08:18 PM
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Re: Suggestions for gettuing most/all of grease out of hdn-pump gun?

On the larger grease guns, there is a small plug on the head to unscrew in order for the air to escape without pulling back the plunger. When you pull back the plunger, it places the head of the gun under negative pressure which is more likely to draw air into a space where you really don't want it.

If there is no bleed screw, try unscrewing the tube under the head. That's a bit of a balancing act between pulling back the plunger far enough to reduce the pressure on the head without sucking air in, or pushing gobs of grease out, in the process.

Either way, there will be some cleanup involved. At work, we filled our guns off of an air powered grease pump system from a 3000 lb bulk tank using a fitting in the bleed screw hole. When the plunger was all the way out, it was full and we shut off the flow. It took only a few seconds and the gun never lost its prime. No cleanup involved either . . . until the end of the shift.

The third option is to use grease in bulk cans and forget the cartridges. Draw back and latch the plunger, unscrew the head, and put the end of the barrel over the can of bulk grease and release the plunger to empty the barrel. Then push the end of the barrel into the bulk grease and pull back the plunger to draw a full load of grease. With a small dome of grease at the end of the barrel, screw the head back on. The excess grease dome pushes out the air as it contacts the head. It works in theory, and most of the time in practice as well.

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Last edited by TUDOR; 10-22-2016 at 08:23 PM.
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post #3 of 4 Old 10-22-2016, 09:12 PM
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Re: Suggestions for gettuing most/all of grease out of hdn-pump gun?

I inherited granddads old plews pump and it had the same problem , the cause was the spring sacked from sitting all the years with a load on it ( springs do wear out and these are very low in pressure ) , I got a replacement spring and you could tell the difference in pressure , and once it was changed it worked like new . the spring was like 1/2 the price of a new one . but the gun works better than most of the new ones .
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post #4 of 4 Old 10-24-2016, 09:40 AM Thread Starter
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Re: Suggestions for gettuing most/all of grease out of hdn-pump gun?

Thanks- to both of you for the suggestions..I haven't been back out to the workshop to look into it again, but I had a whole case of grease cartridges from a sale, that I want to use up.
My gun does have a spring loaded bleeder screw on top of it--and every once in a while--it will ooze a little grease out..
Any other idea's?

and tks-

glenn


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