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Graco 3004 Plunger Assembly with Ball Mount & Ball 300G

The Graco 3004 Plunger Assembly with Ball Mount & Ball 300G is an essential internal pump component designed to restore proper pressure and fluid control in Fire-Ball 300 series lubrication pumps.

  • Complete plunger assembly with ball mount and ball
  • Ensures correct fluid intake and discharge
  • Helps maintain consistent pressure during operation
  • Designed for Fire-Ball 300 series piston pumps

$66.81
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Compatible Machines

  • Graco Fire-Ball 300 Series Piston Pumps
  • Fire-Ball 300 50:1 Grease Pumps
  • Fire-Ball 300 Lubrication Pumps used for oil and grease dispensing

The Graco 3004 Plunger Assembly with Ball Mount & Ball 300G is a critical internal replacement part designed to restore proper pumping action in Fire-Ball 300 series lubrication pumps. It plays a key role in fluid intake and discharge by maintaining pressure and ensuring smooth piston movement.

What This Part Does

  • Forms the main piston / plunger mechanism inside the pump
  • Uses a ball and ball mount to control fluid flow direction
  • Helps maintain consistent pressure during grease or oil delivery
  • Replaces worn internal components to improve pump performance

Typical Applications

Application Area Usage
Automotive Service Shops Centralized grease and oil dispensing systems
Industrial Maintenance Machinery lubrication and fluid transfer
Fleet & Workshop Systems High-pressure piston pump lubrication setups

Frequently Asked Questions

The plunger assembly moves inside the pump cylinder to draw lubricant in and push it out under pressure. The ball and ball mount act as a check valve to control fluid direction.

Yes, this part includes the plunger along with the ball mount and ball, allowing for direct replacement without sourcing individual components.

Replacement is recommended if the pump loses pressure, fails to prime, or shows inconsistent grease or oil output due to internal wear.

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