Sundyne LMV-313, Instruction And Operation Manual

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Instruction and Operation Manual
59
Situation/Symptom Possible Cause Investigative/Corrective Action
Chemical attack of seal faces, seal parts or
o-rings. Investigate fluid properties and determine
suitable materials for replacement.
Excessive radial high speed shaft movement.
Bent high speed shaft or severe out-of-balance. Check high speed shaft journal bearings and
replace if necessary.
Check if damage exists on impeller and/or
inducer which will indicate that a large particle
went through the pump.
Deposits on the impeller/inducer causing
unbalance.
Damage to mechanical seal secondary seal
(Teflon® wedge or U-cup or elastomer o-ring). Check for erosion and/or corrosion attack.
Install seal flush or double seal arrangement.
Loose stack-up of high-speed shaft attaching
components. Check for correct impeller bolt/inducer torque.
Check for cold flow of Teflon® o-rings.