637305-X43 for general repair of 66300-XXX lower pump ends.

Completely clean parts, evaluate and inspect for wear.

Key areas for wear:

• Plunger
• Main material tube
• Balls
• Seats
• Packings
• Foot valve body parts

With the foot valve body parts, inspect the ball, seat, pin and the ball guides for wear and damage. Inspect the parts for scratches etc. Dirty and/or worn parts should not be returned to pump during assembly.