The GRACO 16W490 is a repair kit containing 10 o-rings specifically designed for the cylinder end of GRACO pumps. The o-rings are typically made from solvent-resistant elastomer materials, intended to provide a reliable seal and prevent leaks in the cylinder assembly of GRACO spray equipment.

Key Features:

• Repair kit (o-ring set)
• 16W490 (10-pack)
• Solvent-resistant elastomer (typical for GRACO o-rings)
• Designed for GRACO pump cylinder ends; compatible with models such as ToughTek M680a CS Mortar Sprayer and similar GRACO equipment
• Ease of maintenance: Quick replacement of worn o-rings
• Reliability: High-quality elastomer for long service life
• Duty cycle: Suitable for regular maintenance cycles

Applications:
Used for sealing the cylinder end in GRACO spray pumps, ensuring leak-free operation and maintaining pump efficiency. Commonly applied in construction, industrial, and agricultural spray equipment.

Installation Notes:

• Using genuine GRACO o-rings ensures proper fit, seal integrity, and equipment longevity.
• Clean the cylinder and mating surfaces before installation
• Lubricate o-rings with compatible lubricant if recommended
• Ensure o-ring is seated properly in the groove before assembly
• Follow manufacturer’s torque specifications for cylinder clamp or packing nut
• Inspect o-rings regularly for wear or damage
• Replace o-rings during routine maintenance or at first sign of leakage
• Use only GRACO-approved replacement parts for optimal performance