Xylem IM191 R03 Marlow Series Prime Line Self-Priming Ce User Manual download pdf (Page 10)

WARNING

Hazardous voltage

can shock, burn or

cause death.

Troubleshooting

DISCONNECT AND LOCKOUT

ELECTRICAL POWER BEFORE

ATTEMPTING ANY MAINTENANCE.

FAILURE TO DO SO CAN CAUSE A

SHOCK, BURN OR DEATH.

NOTE: Before implementing any remedial action recommended in the following Troubleshooting guide, refer to

“Recommended Precautions” and “Warning” sections of this manual. The following are some common causes of

problems that may arise.

Symptoms Probable Cause Recommended Action

Will not prime No liquid in pump casing (1). Fill pump casing with liquid being

pumped.

Loose suction inlet (50). Tighten bolts.

Worn suction inlet gasket (49). Replace with new gaskets.

Loose drain plug (2). Tighten plug, use pipe dope or

Teﬂon tape.

Worn pump shaft seal assembly (17). Install new seal.

Leaky suction line. Fix leaky suction. Check all

gasketed surface.

Worn diffuser gasket (7). Replace diffuser gasket.

Suddenly stops pumping. Clogged suction line or suction Clean suction line and strainer

strainer (if used).

Stops pumping until motor is Collapsing suction hose lining. Replace suction line and strainer.

stopped and restarted.

Slowly stops pumping. Clogged impeller (6) or (91), Clean out debris from impeller eye

diffuser (46), check valve (51) or area, suction check valve, or from

suction line. diffuser vanes.

Excessive leakage around shaft. Work pump shaft seal (17). Replace seal assembly.

Will not hold prime. Dislodged or worn check valve (51). Clean or replace check valve. Clean

sealing surface.

Small leak in suction line. Check suction hose or piping for

leak.

Worn seal or packing. Replace seal or packing.

Poor performance Impeller (6) or (91), seal Install new impeller, seal or diffuser.

assembly (17) or diffuser (46).

Motor not up to speed: (a) larger lead wires required

(a) low voltage (b) worn bearings (b) replace bearings.

Noisy operation Worn motor bearings. Replace.

Low discharge head. Throttle discharge.

Impeller clogged. Remove and clean impeller.

Worn coupling or misalignment. Replace or realign coupling.

Units operating at extreme left or Adjust for best performance point

right end of performance curve of operation.

(capacity too high or too low).

Bearings running dry. Check oil level or grease –

add if required.

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 51 52

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Xylem IM191 R03 Marlow Series Prime Line Self-Priming Ce User Manual Page 10

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