Need some help guys

[StarTech]

Here is question. Does air continuously come out even when the unit is shut down? If so the main check valve is not sealing off as it should.

 

[Scrubcadet10]

I think so.
After the unit dies. Air is still coming out of throttle control air line.

 

[Hammermechanicman]

If you take the belt off does the engine idle ok with the control pulled to idle position?

 

[Scrubcadet10]

If you take the belt off does the engine idle ok with the control pulled to idle position?

Yes

 

[Hammermechanicman]

Still sounds like the pilot/unloader is not venting the compressor when it goes to idle.

 

[Scrubcadet10]

 

[Hammermechanicman]

When the engine stops the tank shouldn't be venting. Where is the air venting from with the engine stopped?
Number 19 is the check valve. It is very common for those to leak. When they leak it can screw up what the pilot valve does as it leaks pressure back into the compressor.
looks like the check valve is leaking instead of sealing off and letting the head pressure bleed off through the small line from the check valve to the pilot/unloader valve and out the small hole on the valve.

 

[Scrubcadet10]

The only place air comes from when it idles down and dies is from around the idle control shaft that pushes the linkage on the throttle.

 

[Scrubcadet10]

Here's a video of the only place air is escaping.



Removed the #19 check valve, appears to be in working order, easily opened and closed, I cleaned it up and reinstalled, still same issue

 

[Hammermechanicman]

Don't think I have seen one do that. Just for grins pull the small line off the 19 check valve and see what happens when it kicks down to idle.