makita mac5200

[jem]

compressor engine will run but no pressure will build in tank.cant here any leaks and drain cock is closed.air is flowing out of exhaust.any suggestions to fix myself

[Tinkerdave]

Hi jem,
The upper chamber on that compressor is separated by a very thin Valve Seat To Head Gasket Part Number: 211001-E.If the center part of the gasket blows out, the compressor head will keep blowing air but at the first sign of resistance( air building up in the tank) air pressure will bleed into intake chamber until it equalizes pressure and no more air will flow into the tank.Take the head bolts off and remove the head and inspect the gasket. If it is broken and you replace it be sure to re torque the head bolts after a couple of hours of use to prevent it from blowing out again.Hope that helps.Good luck.
Tinker

[jem]

thanx tinkerdave.the valve seat to head gasket was ok but had a very small pebble logged in the gasket.removed & cleaned.operating perfect now.this site has been saved to my favorites.