Graco 237-004 - Maintenance

11
306–694
Maintenance
WARNING
T o reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
Keep the packing nut/wet–cup (R) half filled with Graco
Throat Seal Liquid (TSL) or compatible solvent, to help
prolong
the packing life. Check the tightness of the pack -
ing nut weekly. Adjust the packing nut so it is just tight
enough to prevent leakage; do not overtighten. Always
relieve
the pressure before adjusting the packing nut.
Each day, check the lubricator and fill as needed, drain
the
air filter , and clean any fluid line filters. Always relieve
the
pressure first.
Check V alve Adjustment
To adjust the intake check valve, refer to the separate dis -
placement
pump manual 307–862.
Shutdown and Care of the Pump
WARNING
T o reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
For overnight shutdown relieve the pressure. Always
stop
the pump at the bottom of the stroke to prevent the
fluid from drying on the exposed displacement rod and
damaging
the throat packings.
Always flush the pump before the fluid dries on the dis-
placement
rod. If you do not flush a circulating system ev -
ery
day , be sure the fluid is circulated frequently enough
to prevent fluid from drying or settling during shutdowns.
Never leave water or water–based fluid in the pump over -
night.
First flush with water or a compatible solvent, then
with mineral spirits. Relieve the pressure after flushing,
but leave the mineral spirits in the pump to protect parts
from corrosion.