is an unusual occurrence, but it does happen.
If you have a belt
driven pump it will be quite obvious if the pulleys are not turning.
If this is the case check for a broken shaft of missing key on each
pulley. It's not so clear if you have a direct
driven pump. The key is what holds the motor shaft and pump shaft
together. If this slips out of place, or shears off, your motor will run but the
pump will not turn.
shafts are not damaged, replace the key and you should be good to go.
It is always a good idea to inspect the pump and motor keyway for
damage. Keys should fit snuggly in the keyway. If there is wiggle
room then you have a more serious problem.
Shaft keyways can be fixed
but this is risky, based on the cost to do it, if unsuccessful. A fixed
keyway on an engine shaft could take out the shaft of a pump if it
fails. Now, you have an engine, and a pump with a broken
on engines and pumps can be replaced but it can be very expensive.
You may need a new
engine and or new
pump if shaft damage is severe.
SOME OF THESE OPERATIONS CAN BE
EXTREMELY DANGEROUS. IF YOU DO NOT HAVE SUFFICIENT TRAINING IN THESE PROCEDURES, WE RECOMMEND YOU
SEEK ASSISTANCE FROM A