Question about Air Tools & Compressors
If the heads were taken apart most likely the valve plate was place backwards causing air to come out of the intake. If the valve plate is on correctly, air coming out of intake is caused by faulty gaskets or leaking reed valves. Good luck
Posted on Jun 12, 2015
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Posted on Jan 02, 2017
It could very well be the valve plate however before you order parts take a look at the cylinders. Unplug the unit, remove the cover from crank side and turn the compressor by hand till the/a piston is at top of stroke. Examine upper cylinder for scratches /wear or failed vinyl piston ring. On oil-free compressors, dirt and grit is sucked-in from the bottom of the cylinder and causes leaks between cylinder wall and piston. If scratched, air pressure is leaking down thru cylinder wall. Failed reed valves cause a pulsation at the intake port (air seems to be pumped out the intake). If you see a model number anywhere on the pump that begins with " WL", your pump is made by Campbell Hausfeld. Parts can be ordered from www.chpower.com. other-wise order parts from sears parts. Cylinder kits are around $40. Good Luck on the repair and email if you have questions.
Posted on Apr 02, 2009
the back pressure valve has failed it costs about 15.00 and can buy from any truck parts store That's Peterbilt trucks or any large truck stores it's one of two sizes 1/2 inch or 3/4 inch when you pull it off be sure you know which way the air flow is or it will not build up.
Posted on Nov 26, 2009
SOURCE: Air leak on top of cylinder head
In all likely hood a flapping noise coming from the cylinder head means an issue with either the intake/exhaust valves or one of the restrictor plates. If you click the link below you can find a diagram for the cylinder head, page B part #107 and #110. You can also get replacement parts from them if needed.
I really hope this helps.
Posted on Dec 26, 2009
It could be a valve/head problem, but it could also be a cylinder/ring problem...to find out it will need to be disassembled...that is not hard... getting parts to reassemble can be the hard part...
Posted on Sep 08, 2011
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