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Use of the product
9.5 Diagnostic help / Troubleshooting guide
Possible symptoms of faults / Causes of faults / Remedies to apply
Defaults
Leakage at the cup seals
The cup seals get rapidly
damaged
The pump is stopped
The motor seems to operate
but the pump does not
deliver product
The pump operates but
irregular flow
At stop, pump piston
continues to move on
going down
At stop, pump piston
continues to move on
going up
Possible causes
Insufficient tightening of the
packing nut
Incorrect assembly of seals
Damaged or worn seals
Incorrect selection of the
material of the joints
No lubricant in the cup
(pumped product drying on
the piston rod).
Product compatibility / seals
The fluid is polymerized,
hardened, dried in the pump.
The cup is too tightened.
Broken part(s) in the pump.
Internal parts of the motor
failing
Defective coupling.
Valve clogged on the seat,
incorrectly mounted or worn.
Air inlet in the suction circuit.
Valve worn or incorrectly
mounted
Plug or drain valve not
tightened
Head piston seals or upper
valve worn or incorrectly
mounted.
Plug
or
drain
valve
tightened
Remedies
Tighten the cup.
Check the assembly.
Replace them.
Check compatibility.
Clean, replace parts if necessary.
When stopping for a long time, stop
the pump with the piston in the low
position.
Check.
Clean the pump, change the parts if
necessary.
Loosen.
Remove, check, replace.
Check the operating of the motor.
Check coupling.
Check mounting, state of the parts,
tightening of parts and seals.
Check and replace parts.
Check and replace parts.
not
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