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Maintenance
Tightening Threaded Connections
Before each use, check all hoses for wear or damage.
Replace as necessary. Check that all threaded con-
nections are tight and leak-free.
NOTE: Periodically, re–torque fluid cover screws (38)
to 10 ft–lb (13.6 NSm).
Cleaning
Clean the outside of the equipment daily, using a soft
cloth and compatible solvent.
Clean the suction tube (L) and inlet strainer daily, using
a compatible solvent.
Clean the air filter (D) in your main air line at least
once a week.
Storage
Before storing the pump, always flush it and relieve
pressure.
Preventive Maintenance Schedule
Establish a preventive maintenance schedule, based
on the pump’s service history. This is especially impor-
tant for prevention of spills or leakage due to dia-
phragm failure.
Troubleshooting
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 11.
1. Relieve the pressure before checking or servicing
the equipment.
2. Check all possible problems and causes before
disassembling the pump.
PROBLEM CAUSE SOLUTION
Pump will not run.
Closed air line valve. Open valve.
Inadequate air supply, or clogged/
restricted air line.
Increase air supply. Do not exceed
maximum air inlet pressure.
Open or clear air line.
Clean air filter.
Clogged pump, fluid line, or spray
gun.
Clear, service. Flush regularly. Do
not allow fluid to set up in the pump
and lines.
Stuck or damaged pump air valve. Disassemble and clean air valve.
Replace worn parts. See page 18.
Use filtered air.
Ruptured diaphragm. Replace diaphragms. See page 17.
Air valve plate installed incorrectly. Align plate with center housing. See
page 19.