Maintenance
WARNING
COMPONENT RUPTURE HAZARD To reduce the risk of serious bodily inju-
ry, including fluid injection or splashing in the eyes or on the skin, always follow
the Pressure Relief Procedure on page 7 before adjusting, cleaning, repairing, or removing the regu- lator from the system.
Never pressurize the system with the fluid regula- tor adjusting knob removed.
Never completely remove the adjusting knob when system pressure is present.
Flushing
DFlush before changing colors, before fluid can dry in the equipment, at the end of the day, before storing, and before repairing equipment.
DFlush at the lowest pressure possible. Check connectors for leaks and tighten as necessary.
DFlush with a fluid that is compatible with the fluid being dispensed and the equipment wetted parts.
1.Record the pressure adjustment setting of the regulator before flushing.
2.Shut off the pump and relieve fluid pressure in the system by triggering the gun and opening the back pressure valve or other bypass valve.
3.Never exceed the maximum working pressure of the lowest rated system component.
4.Open the fluid regulator by turning the adjusting knob (6) fully clockwise.
5.Supply solvent to the system. Set pump to the lowest possible pressure, and start pump.
6.Flush until thoroughly clean.
7.Adjust the fluid regulator to return to the desired fluid pressure setting.
NOTE: Do not allow paint or solvent to set in the system for a long time. Fluid could dry on the piston, causing leakage at the piston packing. If leakage occurs, disassemble and clean the regulator.
Cleaning
When changing fluids or colors, the regulator should be disassembled and cleaned. Regular cleaning and inspection, and lubrication of the piston (15) and piston packing (10) are necessary to keep the fluid regulator working properly.
1.Relieve all the air and fluid pressure in the system.
2.Remove the regulator from the system.
3.Disassemble the regulator, referring to the Parts Drawing on page 9. Clean and inspect all parts.
CAUTION
Use special care when handling the hard carbide portions of the piston (13) and seat (12). Damage will cause poor operation and leakage.
Repairing
Normally, only the ball support (21), seat (20) and piston packing (10) will ever need replacement. Repair Kit 220139 is available to replace these parts. See page 9.
1.Lubricate the piston packing (10), piston (15), and spring locater (11) with lithium base grease.
2.Place the washer (19) over the pointed end of the piston (15).
3.Place the packing (10), with its lips facing down, over the pointed end of the piston (15) and against the washer (19).
4.Insert the piston (15) into the bottom of the cylin- der (7) and gently work it into place.
5.Reassemble the remaining parts in reverse order of disassembly. Torque the valve seat (20) into the housing to 175 to 200
