Powerhorse 750126, Руководство пользователя, Страница: 21 / 34

Troubleshooting
21
WARNING
Before troubleshooting or attempting to service, read the following safety rules.
Before attempting to service the water pump :
1. Review
troubleshooting
table
Review the Troubleshooting Table below for the type of problem you are
experiencing.
However, DO NOT attempt to repair until the steps listed below are
followed.
2. Flush the pump
Pump pure water briefly to clean out the pump.
3. Drain the water
pump
Drain the water pump completely of water using the water pump drain plug, to
prevent freezing.
4. Disconnect
power
Switch off the engine and unplug the spark plug wire.
5. Perform repairs Follow the directions provided in the troubleshooting table to repair the water
pump.
PROBLEM CAUSE SOLUTION
Pump doesn’t revolve
1. Engine will not turn over See engine section of this manual
2. Rusting/Sticking of impeller Disassemble and clean
Pump fails to prime
1. Priming chamber not full enough Add more water to priming chamber
2. Air leaks on suction line joints Check for loose screws or broken hoses
3. Quick coupling gaskets worn Replace gaskets
4. Loose or broken hose clamps Tighten or replace hose clamps
5. Priming chamber is over heated Pour cold water in chamber or let cool
6. Engine speed is too slow Increase engine speed
7. Worn or broken volute or impeller Replace worn or broken component
8. Worn or broken mechanical seal Replace mechanical seal
9. Worn or broken check valve Replace check valve
Low capacity
1. Clogged suction hose Clear obstruction
2. Dirty suction strainer Clear suction strainer
3. Flow restriction due to hose kinks Straighten suction and discharge hoses
4. Suction lift too high Move pump closer to water surface
5. Engine speed too low Increase engine speed
6. Worn or broken mechanical seal Replace mechanical seal
7. Reduced engine performance See engine section of this manual
8. Clogged impeller Remove clog
9. Worn impeller Replace impeller