Maintenance
12
3A2851A
Maintenance
Preventive Maintenance
Schedule
The operating conditions of your particular system
determine how often maintenance is required. Establish
a preventive maintenance schedule by recording when
and what kind of maintenance is needed, and then
determine a regular schedule for checking your system.
Wet-Cups
See F
IG
. 2. Check the packing nut (AC) daily. Keep the
wet-cup filled with Graco Throat Seal Liquid (TSL
™
) or
compatible solvent.
Adjust the packing nut weekly so it is just snug; do not
overtighten. Torque to 20-30 ft-lb (34-41 N•m).
Flushing
1.
, page 10.
2.
Remove spray tip and soak in solvent.
3.
Place siphon tube in grounded metal pail containing
cleaning fluid.
4.
Set pump to lowest possible fluid pressure, and start
pump.
5.
Hold a metal part of the gun firmly to a grounded
metal pail. Trigger the gun until clean solvent dis-
penses.
6.
Remove gun from hose. See gun manual to further
clean gun.
7.
, page 10, and
remove fluid filter and soak in solvent. Replace filter
cap.
Corrosion Protection
Always flush the pump before the fluid dries on the dis-
placement rod. Never leave water or water-based fluid in
the pump overnight. First, flush with water or a compati-
ble solvent, then with mineral spirits solvent (also called
white spirit). Relieve the pressure, but leave the mineral
spirits solvent (also called white spirit) in the pump to
protect the parts from corrosion.
•
Flush before changing colors, before fluid can
dry in the equipment, at the end of the day,
before storing, and before repairing equipment.
•
Flush at the lowest pressure possible. Check
connectors for leaks and tighten as necessary.
•
Flush with a fluid that is compatible with the
fluid being dispensed and the equipment wetted
parts.
