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9
PERIODIC MAINTENANCE
DISASSEMBLY - AIR CYLINDER ASSEMBLY
Refer to the illustration on the next page and the drawings in the back of this manual for your exact model.
1. Turn off the air supply and disconnect the air lines.
2. Turn off the material supply and remove the material line from the Material Inlet (3).
3. Remove the valve from its mounting.
4. Remove the Screws (8) and pull the Wet Section away from the Air Cylinder Assembly. Unscrew the Spool (2
on the prior illustration) from the Piston Rod (5).
5. Unscrew the End Cap (2) from the Air Cylinder Body (1).
6. Remove and discard the O-ring (12).
7. Remove the Screw (11) and Lock Washer (15) from the Snuff-Back Adjustment Knob (3).
8. Remove the Piston (4) from the Air Cylinder Body (1).
9. Remove and discard the O-ring (13).
10. Remove and discard the O-rings (14).
The 715 Dispense Valve Air Cylinder Assembly is now ready for cleaning and assembly.
ASSEMBLY - AIR CYLINDER ASSEMBLY
Note: Clean all valve parts with an appropriate solvent prior to assembly. Always install new, lightly lubricated
o-rings and seals when assembling the valve. Use Krytox 203GPL (part number 84/0200-K3/11) for lubricating
valve parts including seals and o-rings. Lubricate the inside of the Air Cylinder Body (1) and the outside of the
Piston Rod (5) before assembly. Check the Piston Rod (5) for wear and if it is worn secure a replacement before
proceeding.
1. Install the lower O-ring (14) into the groove in the Air Cylinder Body (1). This is easiest if performed from the
top. Squeeze the O-ring to an oblong shape to get it started in the groove, then push it gradually into place
with a small, blunt tool.
2. Install the O-ring (13) around the Piston (4).
3. Insert the Piston (4) assembly carefully into the Air Cylinder Body (1) until the Piston Rod (5) passes through
the lower O-ring (14).
4. Install the upper O-ring (14) into the groove in the End Cap (2).
5. Install the Screw (11) through the Lock Washer (15) and upper O-ring (14) and into the Snuff-Back
Adjustment Knob (3). Make sure the Lock Washer (15) is fully compressed.
6. Install the O-ring (12) into the Air Cylinder Body (1).
7. Screw the End Cap (2) into the Air Cylinder Body (1).
8. Screw the Spool (2 on prior illustration) into the Piston Rod (5).
9. Slide the Wet Section over the Spool (2 on prior illustration) until it seats in the Air Cylinder Body (1) and
secure it with the Screws (8).
Perform the Dry System Checkout, Material Loading and Wet System Checkout procedures.
The 715 Dispense Valve is now ready to be placed back in service.