Honda WT30XK4 Manual page 41

TROUBLESHOOTING
WATER PUMP TROUBLESHOOTING
PUMP WON'T PRIME
Perform vacuum test (page 10-7).
Low vacuum
Disassemble pump and inspect.
Impeller and / or volute worn.
•
Volute loose.
•
Damaged or missing pump housing O-rings.
•
Mechanical seal damaged.
•
Inlet port gasket / inlet valve damaged.
•
Cracked pump housing.
•
Leaking drain or fill plugs.
•
DISCHARGE VOLUME OR PRESSURE TOO LOW
Perform vacuum test (page 10-7).
Low vacuum
Disassemble pump and inspect.
Impeller and / or volute worn.
•
Volute loose.
•
Damaged or missing pump housing O-rings.
•
Mechanical seal damaged.
•
Inlet port gasket / inlet valve damaged.
•
• Cracked pump housing.
• Leaking drain or fill plugs.
NOISE OR VIBRATION (CAVITATION)
Noise or vibration (cavitation)
4-6
Vacuum normal
Vacuum normal
Strainer damaged or clogged.
Suction head too high.
Suction hose too small and/or too long.
Suction hose restricted (kinked, etc.)
Check customer's system and usage.
• Customer not filling pump housing with water
prior to starting.
• Air leak in suction hose and / or fitting.
• Suction head too high.
• Suction hose too long and / or restricted.
• Strainer clogged.
• Customer not positioning throttle in fast
position during priming.
Check customer's system and usage.
Air leak in suction hose and / or fitting.
•
Suction head too high.
•
Discharge head too high.
•
Suction and / or discharge hoses too long,
•
too small, or restricted (kinked, etc.)
Strainer clogged.
•
Customer not positioning throttle in fast
•
position.
Replace (page 10-3).
Correct.
Correct.
Correct.