10
307622
Maintenance
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure
on page 8.
Check the tightness of the packing nut weekly. Always
relieve the pressure
before adjusting. The packing
nut should be tight enough to stop leakage, but no
tighter. Overtightening compresses and damages the
packings and results in pump leaking.
Carefully monitor the fluid supply. If the pump empties
the supply container, air is sucked into the pump,
causing it to run too fast and to be damaged. If the
pump runs too fast, shut it off immediately. Fill the
supply container and prime the pump to remove all air,
or flush the pump.
Always flush the pump before any fluid dries in it.
Always stop the pump at the bottom of its stroke to
prevent the fluid from drying on the displacement rod
and damaging the throat packings.
Check Valve Adjustment
The fluid piston valve is factory set for low volume
pumping of light viscosity fluids. For heavier fluids or
more volume, increase the ball travel by moving the
pin (S) to a high set of holes. See Fig. 3.
Fig. 3
S