Semi-Trash Pump Troubleshooting
18
PROBLEM
SOLUTION
Pump overheats
• Incorrect or not enough lubrication.
• Lubricate using recommended oil or grease according to
directions.
• Worn parts.
• Have qualified technician inspect internal mechanism and
replace parts as needed.
Unit stalls
• Low engine speed.
• Qualified technician should increase no load speed to
3,800±100 RPM by adjusting pressure switch.
• Severely clogged air filter.
• Replace air filter.
• Improper lubrication.
• Check for proper oil level.
Pump does not pump water
• Pump is not primed.
• Prime pump.
• Intake strainer clogged.
• Clean intake strainer or replace if damaged.
• Air leak at intake connector.
• Replace coupling gasket or tighten clamp.
• Hose leaks.
• Replace hose.
• Suction hose has collapsing wall.
• Use hose with non-collapsible wall.
• Hose has too small diameter.
• Use hose with diameter 2” or greater.
• Pump is too high above water surface.
• Locate pump at a lower level so it doesn’t have to work so
hard to lift the water.
Low Pump Output
• Suction hose collapsed, damaged,
• Replace or adjust suction hose.
too long or diameter is too small.
• Air leak at connector.
• Replace coupling gasket or tighten clamp.
• Strainer clogged.
• Clean strainer.
• Discharge hose damaged,
• Replace or adjust discharge hose.
too long or diameter too small.