Magnum MCP5538, Operating And Maintenance Manual

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5538(ce)-6538(ce) Gas
9
T roubleshooting Guide:
Problem Possible Reason
Pump does not prime AND/OR
Pump does not operate properly .
1. Pump may be too high above or too far away from the
water source.
2. There may be leaks in the suction hose or hose
connection.
3. Valves may not be sealing properly due to
accumulation of residue. Pour water into the suction
chamber to seal the valves.
4. Valves may not seal due to distortion. Adjust the
tightness of the suction and discharge connection
mounting bolts.
5. Check diaphragm for breaks and/or leaks.
6. Ensure that the end of the suction line is in position to
allow water to enter. The suction line may be buried
or blocked.
7. Do not allow any point of the suction hose to be
higher than the suction connection on the pump. A
trapped air pocket can form and prevent priming.
8. The pump will not operate properly under a positive
suction head condition.
Reduced Capacity .
1. The discharge line may be too small, too high or too
long causing:
a. Excessive bulging of diaphragm on the down
stroke.
b. Valves closing with a loud snap.
c. Overall rough operation.
d. Engine overloads and then slows down.
*Diaphragm pumps will handle fluids containing a
considerable amount of solids, however, if the mixture is too
heavy to be pumped, liquid must be added until the mixture
becomes sufficiently fluid for pumping.