Troubleshooting
Troubleshooting
Troubleshooting
• Follow the
Pressure Relief Procedure, page
before you check or service the surge
suppressor or remove the surge suppressor from
the system.
• Check all possible problems and causes before
disassembly.
• If you replace the diaphragm, do not attempt to
make a new one yourself. Use only genuine Graco
parts. Other materials may not stand up to the
pressures developed in the suppressor or to the
fluid being pumped. A ruptured diaphragm will
disable the surge suppressor.
Problem
Problem
Problem
Cause
Cause
Cause
Solution
Solution
Solution
The surge suppressor is undersized
for the application.
Reduce the working fluid pressure
and/or flow rate.
Install a larger surge suppressor
model.
Install a surge regulator (SR200)
Poor pulsation reduction.
Extended pump change-over time
due to worn or held open check
valves.
Repair the piston pump.
3A6103A
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