Graco 249065 Pump Service, Servicing Valves, Discharge Valves Disassembly, Assembly, 309828

Pump Service

Repair kits are available. See the Parts Lists (page 21). For the best results, use all parts in the kits.

Perform Pressure Relief Procedure (page 7).

Servicing Valves

Discharge Valves:

Disassembly

1.Remove valve cap.

2.Inspect valve cap o–ring for damage. Replace if necessary.

3.Using a needle nose pliers, remove valve.

4.Use a small probe to move the poppet up and down to assure it is functioning properly.

5.Inspect for any debris that may be lodged between poppet and seal.

6.Remove valve seat o–ring and inspect for damage.

Assembly

1.Install valve seat o–ring squarely into bottom of manifold.

2.Insert valve assembly squarely into port, pushing it into o–ring.

3.Install valve cap and torque to 443 in.–lbs (37 ft–lbs).

Inlet Valves

Disassembly

1.Remove manifold.

2.Remove low–pressure seals by inserting a flat screwdriver under seal lip and lifting up.

3.Using a reversible pliers, carefully remove packing retainers (plunger guides).

Note: Packing retainers can be reused if not worn.

4.Remove high–pressure packing by pulling straight out with your finger.

5.Pull out valve cage/head ring assembly, valve poppet, spring and o–ring.

6.Inspect for debris and/or damage.

7.Remove valve o–ring.

Assembly

1.Install valve seat o–ring squarely into bottom of manifold.

2.Insert valve assembly and push squarely into o–ring.

3.Install high–pressure packing by placing it into cylinder at an angle and then pushing into place.

Note: The point of the “v” or flat side of packing is pointed at you.

4.Lubricate packing retainer o–ring with a light film of oil and install it into cylinder.

5.Push it completely into place.

Note: O–ring will seat just inside manifold and you will hear a slight pop.

6.Insert low–pressure seal by placing it into cylinder at an angle and pushing it into place.

7.Put a thin coat of oil on plungers and packings.

8.Carefully install manifold and torque bolt to 443 in.–lbs (37 ft–lbs).

Note: Valve life is dependant on many variables. Hard water, cavitation, corrosion, chemicals and equipment care. The valves are a wear item and need periodic replacement. Worn o–rings or damaged valves will cause pressure loss and pulsations.

309828 19