The GRACO 188839 is an air cover for diaphragm pumps, specifically designed for the 1040 series. It is constructed from aluminum and serves as a protective and structural component for the air valve assembly in GRACO air-operated diaphragm pumps.

Key Features:

• Air Cover
• 1040 Series
• Aluminum
• GRACO 1040 series air-operated diaphragm pumps
• Durable aluminum construction
• Protects air valve assembly
• Facilitates easy access for maintenance
• Designed for reliable operation in industrial environments

Applications:
Used in GRACO 1040 series air-operated diaphragm pumps for various industrial, mining, and agricultural applications where reliable fluid transfer is required.

Installation Notes:

• Using genuine GRACO parts ensures proper fit, function, and longevity of the pump assembly.
• Align the air cover so the pilot pin fits in the middle hole of the three small holes near the center of the cover.
• Apply medium-strength (blue) Loctite or equivalent to the threads of the screws.
• Install screws hand tight, then torque oppositely and evenly to 120–150 in-lb (14–17 N·m) using a 10 mm socket wrench.
• Ensure the air valve cover, air inlet, and fluid ports remain accessible for ease of operation and service.