Graco 334135B important safety instructions Check Valve Rebuild Kit Installation

Repair

Check Valve Rebuild Kit

Installation

NOTE: See Pump Sub-Assembly, 24S053, page 50 for pump sub-assembly part references.

114.4 1

114.1 114.2

114.3

Chamfer

1 The side of the seat with an outside diameter chamfer must point away from the ball.

FIG. 13: Check Valve Rebuild Kit

Prepare Machine for Kit Installation

1.Relieve pressure. See Pressure Relief Procedure, page 33.

2.To prevent machine movement, press the Machine

Disable Mode key ().

3.Place a waste container below the dispense valve to catch any dispensed material.

4.Push the drive block forward until pistons are fully extended.

5.Move the waste container to below the check valve.

6.Disconnect the male hose fitting from the check valve housing by loosening the hose from the hous- ing. See Pump Sub-Assembly, 24S053, page 50.

7.Remove the check valve housing from the pump endcap by loosening the housing with a wrench.

8.Remove the existing check valve from the housing by inserting a screwdriver or dowel rod into the female threaded end of the check valve housing.

9.Place the new check valve ball guide (114.3) on a bench with the open end up. Install the check valve spring (114.2) into the guide.

10.Install the check valve ball (114.1) on top of the spring (114.2).

11.Place the seat (114.4) on top of the check valve ball (114.1) with the outside chamfered side of the seat facing away from the check valve ball.

12.Hold both ends of the assembled check valve assembly and install the check valve into the unthreaded end of the check valve housing with the ball end facing out.

13.Apply pressure to the valve to snugly fit the assem- bled check valve into the check valve housing. Fit the check valve seat (114.4) into the valve guide.

NOTE: Verify when the assembled check valve and housing are turned up-side down that the contents of the check valve stay in place.

14.Use a wrench to insert the new valve and valve housing into the pump end cap.

15.Install the material male hose fitting into the check valve housing using a wrench.

16.Before operating the machine, activate a few shots to purge any air present in the material hose lines.

17.Calibrate the machine if necessary. Perform Setup, page 26.

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