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9307906
Troubleshooting
Problem Cause Solution
Pump does not run. There is no fluid demand. In a closed-end system the pump runs only when
there is demand for fluid.
Air supply is insufficient. Check air supply. Increase air pressure or volume.
Fluid outlet line or intake valve is
clogged.
Relieve the pressure. Check and clear obstructions.
Air motor parts are worn or
damaged.
Check the piston o-rings (15a*, 15b*) and exhaust
plate (15c*) for swelling. Replace if necessary. See
page 10.
Check the piston assembly (15). Be sure its screws
are properly torqued (10 to 14 in-lb [1.3 to 1.6 N-m])
and that the assembly is hand-tightened onto the
piston rod.
Check the springs (8, 17) for wear or damage, and
replace as needed.
Pump speeds up or runs
erratically.
Material viscosity is too high. Reduce viscosity. Reduce pump speed when running
viscous materials.
Pump throat packings, piston or
piston packings, or intake valve is
worn.
Relieve the pressure. Check and repair. See pages
10 and 11.
Pump slows down or runs
erratically.
Air motor is icing. Shut off pump and allow to warm up. Run pump at a
lower air pressure.
Pump runs, but output is low on
up or down stroke.
Pump piston and/or intake valve is
worn.
Relieve the pressure. Check and repair. See pages
10 and 11.
Pump runs, but output is low on
both strokes.
Air supply is insufficient. Check air supply. Increase air pressure or volume.
Fluid outlet line, intake valve, or
dispense valve is clogged.
Relieve the pressure. Check and clear obstructions.
WARNING
To reduce the r isk of s e rious injury whenever y ou
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.