Inspection & Replacement of Control Valve, Ball & Seat
1.Use a wrench to unscrew the control valve with ring seal.
2.Make sure that the control valve knob turns freely and that its stem is not worn unevenly, mushroomed or otherwise damaged.
3.Remove TC guide, verify that it is unbroken, clean and notch side is up.
4.Remove control ball. Inspect for any cuts, scratches, chips, rust or other damage.
5.Use a 7/16” allen wrench to unscrew the control seat from the valve body. Clean seat and inspect bevel edge for damage. Also ensure that the gasket on the underside of the seat is intact.
6.If no obvious damage to the control ball and seat, place ball into seat and fill with water. If water leaks out between ball and seat, they must be replaced.
7.Replace control valve, ball, seat and/or TC guide as necessary.
8.Clean and inspect valve body opening, where the control seat was installed.
9.Grease valve body opening with multipurpose grease.
10.Screw control seat into valve body and torque to 85
11.Place TC guide into control seat with notched side up.
12.Drop control ball into TC guide.
13.Screw control valve with ring seal into pump head. Torque to 15
14.If a new control valve, ball or seat is installed, complete the Pressure Calibration Procedure.
A repair kit with the control ball and seat is available as
Pressure Control Calibration
DO NOT USE THIS PROCEDURE WITHOUT A TEST GAUGE!
1.Install a gun, flexible airless hose and Airlessco part #
2.Prime unit.
3.Turn the control valve knob fully clockwise (maximum pressure setting).
4.Read the gauge, it should be approximently 2500 PSI.
5.If maximum pressure is incorrect, remove the black plastic cap from the control valve knob. Insert a 3/16” allen wrench into the control valve knob set screw, turn clockwise to increase pressure and
6.NEVER set the maximum pressure above 2500 PSI.
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