Goulds Pumps ANSI FAMILY IOM (ATEX Compliant) - IOM - Manual (Page 56)

TROUBLESHOOTING
54
ANSIFAM IOM - 5/08
Problem Probable Cause Remedy
No liquid delivered.
Pump not primed.
Reprime pump, check that pump and suction line
are full of liquid.
Suction line clogged. Remove obstructions.
Impeller clogged with foreign material. Back flush pump to clean impeller.
Wrong direction of rotation.
Change rotation to concur with direction
indicated by arrow on bearing housing or pump
casing.
Foot valve or suction pipe opening not
submerged enough. Consult factory for proper depth. Use baffle to
eliminate vortices.
Suction lift too high. Shorten suction pipe.
No liquid delivered (3796) Vent line not connected. Pipe in vent line to expel air.
Pump not producing rated flow or head.
Air leak thru gasket. Replace gasket.
Air leak thru stuffing box Replace or readjust packing/mechanical seal.
Impeller partly clogged. Back flush pump to clean impeller.
Excessive impeller-to-casing clearance. Adjust impeller clearance.
Insufficient suction head.
Ensure that suction line shutoff valve is fully open
and line is unobstructed.
Worn or broken impeller. Inspect and replace if necessary.
Pump starts then stops pumping.
Improperly primed pump. Reprime pump.
Air or vapor pockets in suction line. Rearrange piping to eliminate air pockets.
Air leak in suction line. Repair (plug) leak.
Bearings run hot.
Improper alignment. Realign pump and driver.
Improper lubrication. Check lubricant for suitability and level.
Lube cooling. Check cooling system.
Pump is noisy or vibrates.
Improper pump/driver alignment. Align shafts.
Partly clogged impeller causing imbalance. Back-flush pump to clean impeller.
Broken or bent impeller or shaft. Replace as required.
Foundation not rigid.
Tighten hold down bolts of pump and motor or
adjust stilts.
Worn bearings. Replace.
Suction or discharge piping not anchored or
properly supported. Anchor per Hydraulic Institute Standards Manual
recommendations
Pump is cavitating. Locate and correct system problem.
Excessive leakage from stuffing box.
Packing gland improperly adjusted. Tighten gland nuts.
Stuffing box improperly packed. Check packing and repack box.
Worn mechanical seal parts. Replace worn parts.
Overheating mechanical seal. Check lubrication and cooling lines.
Shaft sleeve scored. Remachine or replace as required.
Motor requires excessive power.
Head lower than rating. Pumps too much liquid.
Consult factory. Install throttle valve,
trim impeller diameter.
Liquid heavier than expected. Check specific gravity and viscosity.
Stuffing box packing too tight. Readjust packing. Replace if worn.
Rotating parts bind.
Check internal wearing parts for proper
clearances.