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Flap Pump Parts

Drew Shelley
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Shadrach Grand Master

Shadrach

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Posted

I have a pump on the shelf, but I cannot break it into parts.  I am sure you can source a spring of similar size and spring rate. The HE1518 is not so critical in terms of precise spring rate because that valve is manually operated by a cam and needle. The spring simply holds the valve (ball) against the seat. Err on the side of more compression than less.  If you had lost an HE1516 you would need to be much more precise in sourcing the correct rate spring as it must be heavy enough to hold the ball against the seat but light enough to be unseated by atmospheric pressure when a vacuum is created on one side.

I can provide spring dimensions and pictures if that helps.

Shadrach Grand Master

Shadrach

Posted
Posted
  On 1/5/2024 at 6:37 PM, Drew Shelley said:

Had adjustment screw too loose when bleeding.  Ball came off seat and wound up jammed into the spring.  When we tightened it back up (without realizing all that), it mangled everything. 

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That should not be possible. It reads  like someone installed the wrong spring or perhaps the wrong ball. 
 
Spring should engage the ball before it engages the threads.

I made the below video several years ago to illustrate just what I’ve said above. You can see that the Springs as engage the ball before the retraction screw is threaded.
 

 

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