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The GAST AF520A is a replacement head gasket designed for use with GAST 56 Frame piston air compressor pumps. The head gasket seals the cylinder head to the pump body, maintaining compression and preventing air leakage during pump operation. This is a direct OEM-style service part used during routine maintenance or repair of piston-type air compressor heads. Installation requires disassembly of the compressor head, making it a task typically performed by technicians servicing compressed air equipment in industrial, medical, or commercial environments.
This gasket is intended for GAST 56 Frame piston pump configurations. Piston pumps in this frame size are commonly found in light industrial compressors, vacuum systems, and equipment requiring oil-free compressed air. Replacing a worn or damaged head gasket restores proper sealing at the cylinder head interface, correcting issues such as pressure loss or abnormal noise during pump operation.
Designed for use with GAST 56 Frame piston air compressor pumps.
Head gasket replacement should be performed by a qualified technician experienced with piston-type compressed air equipment. Disconnect and de-energize the compressor and relieve all system pressure before disassembling the cylinder head. Ensure mating surfaces are clean and free of debris before seating the new gasket. Follow the equipment manufacturer's service documentation for proper reassembly sequence.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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