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I have a farmall 300 tractor it keeps blowing out the hydralic pump seal is thier some kind of pressure relief valuve that might be clogged because it builds up too much pressure it can sit there for months with the brushhog up and never bleed off it stays up in the air. thanks

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 104 Answers

SOURCE: coleman powermate inflationmate pump

The ring is gone on compressor. You can buy replacement pistons and rings from colemen. Comes with instructions.Good luck

Posted on Oct 26, 2008

robotek
  • 1512 Answers

SOURCE: how to time my farmall tractor

Hi David

What model Farmall you got there

regards
robotek

Posted on Nov 06, 2008

  • 1 Answer

SOURCE: My EC12 builds up pressure, but then releases all but about 10 psi.

The non-return valve is sticking and it's an easy fix. First, for safety, unplug the electric power to the unit and release any pressure in the tanks. Then unscrew the cap of the non-return valve (between the compressor and the tanks). Inside you should find a tapered rubber plug which is probably sticking in the valve housing. Sand down the diameter of the large end of the plug, being careful not to damage the flat face at the narrow end (which is the sealing surface). For sanding try 400 or 600 grade wet-or-dry paper and sand until the plug just moves freely in the housing. Reassemble and the compressor should work. Incidentally it's an oil-type unit, and quite durable. Make sure it has enough oil.

Posted on Nov 14, 2008

  • 1383 Answers

SOURCE: Craftsman 25 gallon compressor wont cut off

The pressure switch has snap action contacts that are opened by a diaphragm pushing against a spring mechanism. Unplug the compressor and remove the cover to the switch and look for the contacts. Make sure that they are not welded together from use. Move the on/off lever to see if they open and close. You may have welded contacts or broken mechanism within switch. A factory replacement is expensive, however if you are a tinker-er you can use a lower price generic pressure switch available on ebay. Switches are sold by pressure range, you need a 120#. Fittings may need tweaking. Enjoy

Posted on Dec 12, 2008

  • 98 Answers

SOURCE: My craftsman 25 gal. 5 hp. compressor builds 120

Replace check valve the piston is getting stuck sometimes alloying the air to leak all the way down till it comes back on

Posted on Jul 21, 2009

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