Graco 3A0420T Mix Manifold Assembly, Fluid Circulation Manifold with Over Pressure Relief Valves

Models: 3A0420T

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Repair

Mix Manifold Assembly

1.Follow Pressure Relief Procedure, page 22.

2.Disconnect the fluid hose (25) and the flush hose from the mix manifold (36).

3.Loosen the union fittings (306) that connect to the mix manifold adapter fittings.

4.Remove the mix manifold assembly (36).

5.See mix manifold manual for service and repair instructions.

306

36

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Fluid Circulation Manifold with Over Pressure Relief Valves

1

35

37

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FIG. 11: Fluid Circulation Manifold

Replace Over Pressure Relief Valves

1.Flush before repairing equipment, if possible. See

Empty and Flush Entire System (new system or end of job), page 29.

2.Follow Pressure Relief Procedure, page 22.

3.Ensure handle (312) is in the down position. Remove the screws (313), jam nut (304), handles (311), handle rod (312), clips (318), and springs (320).

311

312 313

302

See FIG. 11.

1. Flush before repairing equipment, if possible. See

Empty and Flush Entire System (new system or

304

318 320

311

313

302

 

end of job), page 29.

2.

Follow Pressure Relief Procedure, page 22.

3.

Disconnect all fluid hoses from the fluid circulation

 

manifold (35).

4.

Remove the mix manifold if it is assembled to the

 

fluid circulation manifold. See Mix Manifold

 

Assembly for instructions.

5.

Loosen the two screws (37) that secure the manifold

 

(35) to the cart (1).

6.

Remove the two screws (37) and fluid circulation

 

manifold (35) from the cart (1).

302

304

320

318

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4.Unscrew both over pressure relief valves (302) from the manifold.

NOTE: The correct over pressure relief valve must be used on all systems. Choose the correct color coded valve from the chart on page 39.

5.Apply blue threadlock to new over pressure relief valves (302) and install in the manifold. Torque to 28-32 ft-lb (38-43 N•m).

6.Place a spring (320) over each valve stem. Place a clip (318) in each valve stem groove to retain the springs.

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3A0420T

Page 38
Image 38
Graco 3A0420T Mix Manifold Assembly, Fluid Circulation Manifold with Over Pressure Relief Valves