Graymills Diaphragm One Inch Kit Check Ball and Seat Owner's manual

Hello! I've reviewed the provided Graymills document, which outlines the installation instructions for Seat Kit 784-92404 and Check Ball Kits 784-92405 and 784-92406. The document includes a comprehensive guide on how to disassemble and reassemble the pump and its components, including the proper seating of check balls and torque specifications. I'm ready to assist you with any questions you may have about this procedure.
What should I do before starting disassembly?

What tools are needed to remove the outlet manifold fasteners?

What should I pay attention to when reassembling the pump?

Graymills Corporation 3705 N. Lincoln Ave. Chicago, IL 60613 USA 773-248-6825 [email protected] www.graymills.com

795-92404_0514

KIT INSTALLATION INSTRUCTIONS

SEAT KIT #784-92404

CHECK BALL KITS #784-92405 AND #784-92406

Kit Contents

784-92404 SEAT KIT

QTY ITEM DESCRIPTION

4 10 Polypropylene Seats

8 12 PTFE O-Rings

784-92405 CHECK BALL KIT

784-92406 CHECK BALL KIT

QTY ITEM DESCRIPTION

4 11 PTFE Balls

8 12 PTFE O-Rings

NOTE: To ensure proper seating of the check balls,

always replace the seats and o-rings when replacing the

balls. Also, on models with manifold o-rings, replace the

o-rings.

Disassembly

1. Follow the Pressure Relief Procedure. Disconnect all

hoses.

2. Remove the pump from its mounting.

NOTE: For plastic pumps, use hand tools only until

thread-locking adhesive patch releases.

3. Use a 10 mm socket wrench to remove the outlet

manifold fasteners (6).

4. Remove the o-rings (12), seats (10), and balls (11).

5. Turn the pump over and remove the inlet manifold.

Remove the o-rings (12), seats (10), and balls (11).

Reassembly

1. Clean all parts and inspect for wear or damage.

Replace parts as needed.

2. Reassemble in the reverse order. Be sure the ball

checks (10-12) and manifolds (4, 5) are assembled

exactly as shown. The arrows (A) on the ﬂuid covers

must point toward the outlet manifold (4).

Important Safety Instructions

Read all warnings and instructions in the Operation

Manual that was provided with your pump. If you have

questions, call Graymills Customer Service at

773-248-6825.