Owner`s manual

Owner’s Manual 13
Voltmaster Centrifugal Trash Pumps
4 Troubleshooting
4.1 Common problems
For troubleshooting, check and resolve the following issues as
needed. Contact the factory for assistance if necessary (see
Section 1.2, Where to obtain service, page 1).
If the pump fails to prime:
■ The priming chamber might be empty or not sufficiently full
■ Liquid in priming chamber might be overheated
■ The direction of rotation might be reversed
■ Rotation speed might be too slow
■ The impeller or volute might be worn or broken
■ Delivery line might be under pressure
■ There could be air leaks in the suction-line or at joints in the line,
loose screws at joints in the line, or broken hoses in the line
■ There could be an air leak through a damaged mechanical seal
■ Quick-coupling gaskets might be broken or improperly mounted
■ Hose clamps might be loose or broken
If capacity is low:
■ The suction strainer might be clogged
■ The suction or delivery line might be obstructed
■ There could be high-friction losses in the suction line, which may
require eliminating bends in the line or restrictions from valves
■ The suction lift could be too high
■ The rotation speed might be too slow
■ The impeller might be clogged