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Old 07-09-2013, 09:47 AM
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piston slapper piston slapper is offline
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Join Date: Mar 2010
Location: Tampa Fl
Posts: 4,236
If you look at the damaged cylinder will notice the voids between the ports are tapered..
If they were caused by a piece of metal..they would be consistant...not tapered..
The tapering of the grooves is caused by hydralic fluid screaming thru the breach between the ports..

A closer look at the slits in the valve plate shows only 1 damaged slit..the piece that initially contacted the cylinder block..
If the pump had ingested a piece of metal...all the slits would be hogged out...

The pump might not have been purged correctly when installed...causing this long term failure...
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