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781Mini Series Spray Valve
15
Replacing a Valve Component (Full
Disassembly and Reassembly)
(continued)
CAUTION
Replacement parts for 0.01" and 0.03" valves are not
interchangeable:
• Use the correct replacement parts based on the size of the
valve.
• Do not attempt to convert a 0.01" valve to a 0.03" valve, or vice
versa.
Reassemble the Valve
Reassemble the valve in the reverse order of disassembly (refer
to “Disassemble the Valve” on page 14). Perform the following
actions as you reassemble the valve:
• Replace damaged or worn components.
• Always replace the needle-and-piston assembly and the nozzle
together if one of these components is damaged or worn.
• Lubricate O-rings with the supplied fluorocarbon grease
(P/N 7014917) only if the assembly fluid being dispensed is
compatible with it.
• If reinstalling the U-cup seal, lubricate it with the supplied
grease and ensure that it is in the correct orientation.
• Ensure that inlet fittings are connected to the correct inlet port.
Air and fluid symbols are provided on the fluid body. Refer
to “Reassemble the Wetted Parts” on page 12 for detailed
reassembly steps for the wetted parts.
• Recalibrate the stroke control knob if needed.
Correct orientation of the U-cup seal
Zero (0) and reference mark lined up,
indicating that the stroke control is
properly calibrated.
Correct installation location for the
fluid inlet fitting
Correct installation location for the
nozzle air fitting
