Generac 7126 Manuel Du Propriétaire page 15

PROBLEM
Pump not 1. Air leak in suction hose.
operating.
2. Suction and/or discharge hoses
3. End of suction hose not submerged.
4. Total head exceeds pump capacity.
Weak 1. Air leakage (intake) at suction side.
discharge
flow. 2. Reduced engine power output.
3. Damaged mechanical seal.
4. Suction lift too high.
5. Suction hose too long, or hose
6. Leaking discharge hose or
7. Damaged mechanical seal.*
8. Impeller obstructed.
9. Worn impeller.**
10. Engine throttle in SLOW position
Pump does 1. Air leakage (intake) at suction side.
not prime
water, or 2. Insufficient priming water inside
priming takes
a long time. 3. Water drain plug is loose.
4. Engine malfunction.
5. Damaged mechanical seal.
6. Incorrectly sized suction hose.
7. Suction hose is too long.
8. Excessive suction lift. ***
Pump loses 1. Water level drops below the end of
prime.
Pump shuts 1. No fuel.
down during 2. Low oil sensor shuts down unit.
operation.
Oil leakage Engine failure.
at muffler or
air cleaner.
Water Damaged mechanical seal.
leakage
between
engine and
pump.
* Mechanical seal damage may be caused by normal wear, overheating, or pumping
incompatible fluids.
** Excessive impeller wear is primarily due to cavitation. Causes include restricted suction and
excessive suction lift.
*** Total suction head should not exceed 26 ft (8 m).
Owner's Manual for Water Pump
CAUSE
blocked.
diameter too small.
connection.
pump casing.
the suction line.
Maintenance and Troubleshooting
CORRECTION
1. Check suction hose and connections
for leaks. Tighten or repair.
2. Check hoses and strainer. Clear
obstructions.
3. Increase suction hose length or
move pump closer to water.
4. Reduce total head or choose a
different pump for the task.
1. Check suction hose and connections
for leaks. Tighten or repair.
2. Contact Independent Authorized
Service Dealer.
3. Replace mechanical seal.
4. Lower suction lift.
5. Shorten suction hose, or increase
hose diameter.
6. Check discharge hose and
connection for leaks. Tighten or
repair.
7. Replace mechanical seal.
8. Clean impeller.
9. Replace impeller.
10. Increase throttle position.
1. Check suction hose and connections
for leaks. Tighten or repair.
2. Add priming water.
3. Tighten water drain plug.
4. Contact Independent Authorized
Service Dealer.
5. Replace mechanical seal.
6. Use correct suction hose.
7. Move pump closer to water.
8.
1. Increase length of suction line or
move the pump closer to the water
source.
1. Allow engine to cool for 2 minutes,
then fill fuel tank.
2. Make sure unit is on flat surface.
Check oil level and add more if
necessary.
Repair or replace.
Replace mechanical seal.
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