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Maintenance
309909H 9
Maintenance
Preventive Maintenance
Schedule
Establish a preventive maintenance schedule, based on
the pump’s repair history.
Mix Manifold
See mix manifold manual 310654.
Dispense Valve
See dispense valve manual 310655.
Pump
See applicable pump manual 310671, 310672, or
310662.
Turbine Alternator
Replace bearings every 2000 hours. See page 19.
Air Filters
Check daily. Drain and clean as necessary. See page
15.
Pump Test/Meter Calibration
See ProMix Easy Operation manual. If pumps/meters
fail test, see Troubleshooting, page 10.
Wet Cup
Check pump and dispense valve wet-cups daily. Keep
filled with Graco Throat Seal Liquid (TSL), Part No.
206995.
Storage
Before storing the pump, always flush it, see ProMix
Easy Operation manual. Relieve the pressure, page 7.
Icing
If you experience icing at the pump air manifold:
• Reduce pump input air pressure below 80 psi (0.56
MPa, 5.6 bar), if required spray pressure allows.
• Reduce moisture in compressed air supply, or use
heated air.
If icing persists, see table below.
Problem Solution
Pump slows on both up
and down stroke.
Turn D port bleed screw 60° (1/6 turn) counter-
clockwise, to bleed 1 cfm air to melt ice.
Pump slows on down
stroke.
Turn D port bleed screw 60° (1/6 turn) counter-
clockwise, to bleed 1 cfm air to melt ice. If icing
continues, turn screw to 90° (1/4 turn) to increase
air flow to 2 cfm. If necessary, increase air flow to
3 cfm by turning screw to 270° (3/4 turn). Do not
exceed 3 cfm (3/4 turn maximum).
Pump slows on up stroke. Turn U port bleed screw 90° (1/4 turn) counter-
clockwise, to bleed 1 cfm air to melt ice. If icing
continues, turn screw to 120° (1/3 turn) to
increase air flow to 2 cfm. If necessary, increase
air flow to 3 cfm by turning screw to 180° (1/2
turn). Do not exceed 3 cfm (1/2 turn maximum).
TI5294a
U
D