John Deere AC-SP3GS - Manuel (Page 16)

16 Semi-Trash Pump Operator's Manual
Solutions
Solution 1: Remove debris in impeller. (Do not remove impeller)
Solution 2: Check suction hose. Most cases of lack of priming
or low water flow are caused by air leakage on the suction
side of the pump.
Suction test:
a. Remove suction hose
b. Start engine with water inside the pump.
c. Press the palm of your hand to cover the suction inlet,
hold and wait 30 seconds. If you feel suction on your
palm, the pump is working fine. Check suction hose
and connections.
d. Check if rubber seal is installed.
Note: In case of water leakage
between engine and pump,
usually the cause is damaged
mechanical seal. Please
ask shop for assistance and
replace mechanical seal.