Gast | ROA/RAA/SOA/SAA Service Kit | K757

The Gast K757 Service Kit is designed for maintenance and repair of compatible Gast rocking piston air compressors and vacuum pumps. This genuine Gast replacement parts kit contains the components needed to service one cylinder, helping restore pump performance to original factory specifications when installed as part of proper maintenance. The K757 kit includes a replacement piston cup (AH175), cylinder O-ring (AH179), valve plate assembly (AJ343A), and head gasket (AJ404A), along with the required screws. Gast recommends servicing applicable units approximately every two years. Each K757 kit services one cylinder, so pumps requiring maintenance on multiple cylinders may need additional kits. The Gast K757 repair kit is listed for select ROA, RAA, and SAA series rocking piston pumps, including pressure and vacuum configurations. Confirm your pump's complete model number before ordering to ensure the correct service kit is selected. See the compatible model list below for additional reference. TECO Technology is an authorized Gast distributor and repair facility. We offer genuine Gast replacement parts, service kits, and technical assistance to help keep your Gast air compressors and vacuum pumps operating reliably.