GRACO 557875 - Dust Cap for Fill Stud, 1/4" NPT

Dust cap component for GRACO G3 Pro Grease and MSP Series Progressive lubrication systems. Essential protective component that prevents contamination of fill studs in automated lubrication applications, ensuring system reliability and performance.

Specifications

• Thread: 1/4 in NPT
• Connection Type: Quick fill stud compatible

Features

• Protects fill connections from contamination
• Compatible with quick fill stud systems
• Essential component for maintaining system cleanliness
• Protects fill stud from contamination
• Compatible with G3 Pro and MSP Series systems
• Essential component for system maintenance

Applications

• Progressive lubrication systems
• Industrial equipment lubrication
• Multi-point lubrication applications
• G3 Pro Grease systems
• MSP Series applications
• Industrial lubrication equipment

Compatible Equipment

• G3 Pro Grease pump systems
• MSP Series Progressive systems
• Triplex configurations
• Quick fill stud - 1/4 in NPT (557874 - Stud Fill 4ts5-21000)
• G3 Pro Grease systems
• Quintuplex pump configurations

Related Parts

• 557874 - Quick fill stud – 1/4 in NPT
• 96G147 - G3 Pro pump 12 V
• 96G149 - G3 Pro pump 24 V
• 563160 - 2500 psi relief
• 556420 - 1/4 NPT service tee
• 563061 - Check valve, double ball
• 555453 - 1/4 NPT street elbow
• 156971 - 1/4 NPT hex nipple
• 557874 - Stud Fill 4ts5-21000
• 96G161

This part appears in both 12V and 24V Triplex kit configurations, indicating it's a standard component across voltage variants. Used in conjunction with quick fill stud 557874 for maintenance access points. This dust cap is included as quantity 1 in both the 12V and 24V G3 Pro Grease/MSP Series Progressive Quintuplex Kits, working in conjunction with the quick fill stud (557874) to maintain system cleanliness. Included as single quantity in both 12 VDC and 24 VDC Triplex Kit configurations. Works in conjunction with quick fill stud part number 557874.

Reference Manuals

• 352295 (Page 4) Fracturing Equipment Selection Guide
• 312054 (Page 27) Grease Jockey Chassis Lubrication System
• 333508 (Page 75) Komatsu Wheel Loader Installation
• 333514 (Page 50) omatsu PC210/PC240/ PC290 and PC360/PC390/PC490 Excavator Installtion
• 334942 (Page 28) 26:1 Grease Single Stroke Pump