Quick view Add to Wishlist Blackmer Gear Rotor Assembly (D1) for Viking PN. 3-570-552-312-37 for Viking Pump Model K & KK Viking OEM. No. 3-570-552-312-37 Envirogear G Series Rotor Assembly for Viking Internal Gear Pump Model K & KK Material: Cast Iron, ASTM A48, Class 35B Item No. D1 Fits Viking K & KK / EnviroGear -G1-24 & G1-32 EnviroGear... MSRP: $586.00 Add to Cart The item has been added Compare