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TROUBLESHOOTING
Symptom
Pump cycles once
Pump will not operate
Pump cycles and will not
prime or flow
Pump running
sluggish/stalling
Product leaking through
exhaust
Premature diaphragm
failure
Breaking and bending
shafts
Potential Cause(s)
1Incorrect pilot o-ring placement
2Inner diaphragm plate installed backwards
3Deadhead (system pressure meets or exceeds
air supply pressure)
4Air valve or center block gaskets installed incorrectly
1Pump is over lubricated
2Lack of air (line size, PSI, CFM)
3Worn o-rings
4Wrong type of lubrication (attack on o-rings)
5Debris in air valve
6Clogged manifolds
7Incorrect o-ring placement
8Deadhead (system pressure meets or exceeds
air supply pressure)
1Cavitation on suction side
2Valve ball(s) not seating properly or sticking
3Valve ball(s) missing (pushed into chamber)
4Valve ball(s)/seat(s) damaged or attacked by product
5Clogged suction line
1Over lubrication
2Icing
3Clogged manifolds
4Deadhead (system pressure meets or exceeds
air supply pressure)
5Cavitation on suction side
6Lack of air (line size, PSI, CFM)
1Diaphragm failure, or diaphragm plates loose
2Diaphragm stretched around center hole or bolt holes
3Excessive air supply pressure
1Cavitation
2Excessive flooded suction pressure
3Misapplication (chemical/physical incompatibility)
4Wrong type of lubrication (attack on air side)
5Incorrect diaphragm plates or plates on backwards
6Incorrect shaft with corresponding elastomer
7Start up at full air pressure
1Build up of solids in water chamber
2Loose diaphragm plates
Recommendation(s)
1Reinstall pilot o-rings in correct positions
2Reinstall inner diaphragm plate correctly
3Check system for pressure ratio to pump
4Install gaskets with holes properly aligned
1Set lubricator on lowest possible setting or remove
• Elima-Matic is designed for lube free operation
2Check the air line size and length, compressor
capacity (HP vs. cfm required)
3Replace o-rings
4Check compatibility of o-rings with lubrication
5Clean air valve/filter
6Clean suction or discharge manifolds/piping
7Reinstall o-rings in correct position
8Increase air supply pressure
1Check suction condition (move pump closer to product)
2Clean out around valve ball cage and valve seat area
• Replace valve ball or valve seat if damaged
• Use heavier valve ball material
3Worn valve ball or valve seat
• Worn fingers in valve ball cage (replace part)
4Check Chemical Resistance Guide for compatibility
5Clean suction manifold and/or piping
1Set lubricator on lowest possible setting or remove
• Elima-Matic is designed for lube free operation
2Clean or replace exhaust muffler
3Clean manifolds to allow proper air flow
4Check system to locate deadhead (equilibrium)
• Increase air supply pressure
5Check suction (move pump closer to product)
6Check the air line size, length, compressor capacity
1Replace diaphragms, check for damage and ensure
diaphragm plates are tight
2Check for excessive inlet pressure or air pressure
• Tighten bolts to recommended torque
3Check Operating Manual for recommendations
1Enlarge pipe diameter on suction side of pump
1,2 Move pump closer to product
• Raise pump/place pump on top of tank to reduce
inlet pressure
2Add accumulation tank or pulsation dampener
as close to the pump as possible
3,4 Consult Chemical Resistance Chart for compatibility
with products, cleaners, temperature limitations
and lubrication
5,6 Check Operating Manual to check for correct part
and installation
7Start up pump slowly (manually or with Smart Start)
1Flush pump, start pump slow
2Tighten diaphragm plates when replacing diaphragms