The GRACO 16W508 is a pump lower rebuild kit designed for the M680 series mortar pumps. It contains all necessary soft seals and hardened stainless steel check balls, intended for restoring or maintaining the performance of the pump lower assembly in heavy-duty material handling applications.

Key Features:

• Pump Lower Rebuild Kit
• M680, 680cc Pump Lower
• Soft parts plus hardened stainless steel balls
• 1000 psi (7 MPa, 69 bar) Maximum Fluid Working Pressure (for M680 pump lower)
• GRACO M680 series mortar pumps
• Includes all soft seals and check balls for complete rebuild
• Designed for heavy materials and professional use
• Stainless steel construction for durability
• Tri-clamp cylinder for easy disassembly and maintenance
• High-velocity flush for effective cleaning
• Pack-less pressure relief valve

Applications:
Used for rebuilding or maintaining the pump lower assembly in GRACO M680 mortar pumps, which are designed for handling heavy materials such as mortars, grouts, and other viscous fluids in construction and industrial settings.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, reliability, and safety of the equipment. Non-genuine parts may compromise pump integrity and void warranties.
• Follow all safety instructions and warnings in the GRACO manual before starting work.
• Hold onto assembly firmly when removing clamps to prevent parts from falling.
• Clean all components thoroughly before reassembly.
• Replace all soft seals and check balls included in the kit for a complete rebuild.
• Use proper tools (e.g., 5/8 in. wrench) for disassembly and reassembly.
• Ensure all o-rings and seals are properly seated to prevent leaks.
• Refer to the GRACO manual for detailed step-by-step instructions.