WDM GE Series, Руководство по эксплуатации

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27
GS Pumps.
7. Reassembly of pumps.
•
Before reassembly, all parts should be thoroughly cleaned.
•
To identify required replacement items refer to the parts list.
When ordering the parts, have the pump serial or catalog
number available.
•
To reassemble follow the reverse of the disassembly
instructions.
•
If all mechanical seal components are not in good condition,
leakage may occur. In order to prevent leakage, completely
replace the seal..
•
New shaft sleeves are installed by bonding to shaft with
hydraulic setting Locktite.
8. Trouble shooting.
Symptom Possible cause(s) Possible solution(s)
Pump does not start Motor not connected
Revise that motor connections
have been properly done.
Little or no discharge and unit
will not prime.
1. Casing not filled with water.
1. Fill pump casing. Using a foot
valve will extend pump life and
facilitate immediate priming.
2. Total head too high. 2. Shorten suction head.
3. Suction head higher than
pump designed for. 3. Lower suction head, install
foot-valve and prime.
4. Impeller partially or
completely plugged. 4. Disassemble pump and clean
out impeller.
5. Hole or leak in suction line. 5. Repair or replace suction line.
6. Foot-valve too small.
6. Match foot-valve to piping or
install one size larger foot-valve.
7. Impeller damaged.
7. Disassemble pump and
replace impeller.
8. Foot-valve or suction line
not submerged deep enough
in water; pulling air.
8. Submerge lower in water.
9. Insufficient inlet pressure or
suction head.
9. Increase inlet pressure by
adding more water to tank or in-
creasing back pressure by turning
gate valve on discharge line to
partially closed position.