Troubleshooting - DARLEY 2BE6.5H Operator's Manual

TROUBLESHOOTING:

PROBLEM
PUMP FAILS TO PRIME
OR LOSES PRIME
PUMP FAILS TO PRIME OR
LOSES PRIME CONTINUOUSLY.
CAPACITY OF PUMP LOW.
PRESSURE OUTPUT OF PUMP
IS LOW.
WATER LEAKING BETWEEN THE
PUMP AND THE ENGINE.
ENGINE WILL NOT START
Prepared by: TED
Approved by: MCR
© W.S. Darley & Co.
CAUSES
AIR LEAKS
DISCHARGE CHECK VALVE
LEAKS.
SUCTION WHIRLPOOL.
HIGH POINT IN SUCTION
LINE.
TOO HIGH OF A SUCTION
LIFT.
SUCTION HOSE TOO SMALL.
DEFECTIVE SUCTION HOSE.
PLUGGED SUCTION SCREEN.
WORN IMPELLERS AND SEAL
RINGS.
ABOVE CAUSES OF LOW
CAPACITY.
TOO MUCH CAPACITY.
SHAFT SEAL DAMAGED
FUEL VALVE IS OFF
IGNITION SWITCH IS OFF
34
SUGGESTED CORRECTION
CLEAN AND TIGHTEN ALL SUCTION CONNECTIONS.
OF HOSES AND HOSE GASKETS.
RUN DRY VACUUM TEST AS FOLLOWS:
A) CONNECT SUCTION HOSE TO PUMP AND CAP END.
B) DRAIN PUMP.
C) OPERATE PRIMER AND DRAW A VACUUM, PREFER 20-22".
D) IF VACUUM DROPS MORE THAN 10" HG. IN 10 MINUTES,
EXCESSIVE LEAKAGE IS PRESENT.
LEAKS ARE SOMETIMES AUDIBLE.
REMOVE DISCHARGE CHECK VALVES AND REPAIR OR REPLACE.
CLEAN SEALING FACE OF PUMP CASING FLANGE
PUMPING LARGE VOLUMES WITH SUCTION HOSE TOO SHALLOW IN WATER
SUPPLY CAN CAUSE WHIRLPOOLS, ALLOWING AIR TO BE DRAWN INTO
THE PUMP, LOSING PRIME.
LESSEN VOLUME BEING PUMPED.
LAY A FLAT OBJECT, SUCH AS THE KIT CONTAINER COVER OVER THE
TOP OF THE SUCTION SCREEN WHEN PUMPING IN SHALLOW WATER.
LOWER SUCTION HOSE BELOW PUMP SUCTION, IF NOT POSSIBLE,
REPRIMING SEVERAL TIMES MAY BE NECESSARY TO REMOVE AIR LOCK.
SOMETIMES TOO HIGH OF A LIFT IS NOT OBTAINABLE.
THE LIFT AS LOW AS POSSIBLE.
USE THE PROPER SIZE SUCTION HOSE FOR THE RATING OF THE PUMP.
SUCTION HOSE LINER MAY BE COLLAPSING, RESTRICTING FLOW TO
PUMP. TRY DRAFTING WITH A DIFFERENT SUCTION HOSE.
SUCTION HOSE MAY BE PUNCTURED, OR DAMAGED.
WITH A DIFFERENT SUCTION HOSE.
CLEAN DEBRIS OUT OF SCREEN.
REPLACE WORN IMPELLERS AND SEAL RINGS TO MEET W. S. DARLEY
SPECIFICATIONS.
CHECK ALL OF THE ABOVE CAUSES OF LOW CAPACITY AS THEY CAN
ALSO AFFECT PUMP PRESSURE.
CAPACITY AND PRESSURE ARE DIRECTLY PROPORTIONAL.
TO PUMP A LARGE CAPACITY, PRESSURE WILL BE LIMITED.
INCREASING PUMP PRESSURE DOES NOT MEAN A VOLUME INCREASE IN
WATER PUMPED.
RUNNING A PUMP DRY (WITHOUT WATER) FOR LONG PERIODS OF TIME
CAN DAMAGE A SHAFT SEAL.
WATER. REPLACE SHAFT SEAL.
MOVE FUEL VALVE LEVER TO THE ON POSITION.
TURN ENGINE IGNITION SWITCH ON
Rev. #: 13
15May2006
1200569.doc
CHECK CONDITION
WITH ENGINE SHUT OFF, AIR
PLACE SUCTION HOSE DEEPER, OR
TRY DRAFTING
AVOID RUNNING A PUMP WITHOUT
TRY TO KEEP
IF TRYING
ALSO