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Maintenance
Fill the wet-cup (P) 1/2 full of Graco Throat Seal Liquid
(TSL) or compatible solvent and keep it 1/2 full to keep
fluid from drying on the displacement rod and damag-
ing pump throat packings. See Fig. 5.
Lubricate the throat packings frequently when you are
pumping a non-lubricating fluid, or are shutting down
for more than a few days. Some pumps have a grease
fitting (DD) for this purpose. See Fig. 5.
The accessory air line lubricator (C) provides automat-
ic air motor lubrication. To manually lubricate the mo-
tor, disconnect the air line at the air motor inlet, put
about 15 drops of lightweight oil in the inlet, reconnect
the air line and turn on the air to blow oil into the motor.
Never allow the pump to run dry of fluid being pumped.
A dry pump will quickly accelerate to a high speed,
possibly damaging itself. If your pump accelerates
quickly, or is running too fast, stop it immediately and
check the fluid supply. If the supply container is empty
and air has been pumped into the lines, prime the
pump and lines with fluid, or flush and leave filled with
compatible solvent. Be sure to eliminate all air from the
fluid system.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
WARNING
Do not attempt to adjust the packing nut with the
pump operating.
Periodically, check the tightness of the packing nut (P).
Relieve the pressure, then tighten enough to prevent
leakage; no tighter. See Fig. 5. If the leakage can not
be stopped, change the packings to prevent exposure
to the fluid being pumped.
Fig. 5
P
H
DD
K
J
L
03764B