Xylem IM191 R03 Marlow Series Prime Line Self-Priming Ce User Manual download pdf (Page 7)

Check drive coupling alignment. (Refer to Coupling

Alignment section for instructions.)

Check motor wiring.

1. All electrical work must be done

by a licensed electrician.

2. Before working on pump and/or

motor be certain the electrical power

is off at the main junction box.

3. Disconnect the fuse or circuit breaker

and have the main switch tagged

“DO NOT ENERGIZE THIS

SWITCH, PERSONNEL WORKING

ON EQUIPMENT.”

4. Some motors are equipped with built-in thermal

overloads to shut off the motors in the event the

temperature becomes excessive (as a result of

mechanical or electrical problems, such as low

voltage, poor ventilation, overloaded lines, etc.).

These motors will restart automatically as the motor

cools down. For safety sake, DO NOT work on any

motor without shutting off the electricity.

5. Never operate an electric motor driven pump

without properly grounding the motor frame. Serious

injury or death by electrocution could result.

6. Drain pump casing completely before taking pump

apart. It is advisable to ﬂush the inside of the casing

with water before taking pump apart.

7. Never start pump before putting

back all necessary guards such as

coupling guard.

• After stabilizing the system at normal operating conditions,

check the piping. If necessary, adjust the pipe supports.

• On frame-mounted units, coupling alignment may have

changed due to the temperature differential between pump

and motor. Recheck alignment following procedures and

hazard warnings in “COUPLING ALIGNMENT” section of

this manual.

SEASONAL SERVICE

• To REMOVE pump from service, remove drain plug and

drain all unprotected piping.

• To RETURN pump to service, replace drain plug using

Teﬂon™ tape or equivalent on male threads.

• Reconnect suction line if removed, examine union and repair

if necessary.

• Refer to OPERATION section of manual.

Disassembly

• Follow ALL warnings and instructions in the “MAINTE-

NANCE” section of this manual.

• Close-coupled units: Remove motor hold-down bolts.

• Frame-mounted units: Remove coupling guard, spacer, cou-

pling and frame hold-down bolts.

LIQUID END

1. Remove casing bolts (47).

2. Remove back pull-out assembly from casing (1).

Discard gasket (8).

3. Remove diffuser and o-ring.

NOTICE: DO NOT INSERT SCREWDRIVER BETWEEN

IMPELLER VANES TO PREVENT ROTATION.

4. On close-coupled units, remove motor end plug or cover

to expose screwdriver slot or ﬂats on end of motor shaft.

5. While restraining shaft with an appropriate tool (close-

coupled units) or with a strap wrench (frame-mounted

units) remove impeller bolt/nut (4). Impeller bolt/nut may

need to be heated with torch to remove. Discard.

NOTICE: EXERCISE CAUTION WHEN HANDLING

HOT IMPELLER BOLT/NUT.

6. Remove impeller washer (5).

7. Insert two pry bars, 180° apart, between impeller and

seal housing (10). CAREFULLY pry off impeller.

8. Remove impeller key (37).

9. Remove seal housing bolts (33) and seal housing (10)

pulling with it the mechanical seal assembly. Discard seal

assembly.

10. Inspect shaft sleeve (24). If badly scored, remove by

heating with torch. Discard.

11. Push out the mechanical seal stationary seat from the

seal housing. Discard.

NOTE: Check impeller and diffuser for any broken vanes or

wear. Replace it if necessary. Also check diffuser o-ring (7).

Replace if damaged.

DISASSEMBLY OF BEARING FRAME (P-SERIES)

1. Remove deﬂector (63) from shaft.

2. Remove bearing cover (80).

3. Remove shaft assembly from frame.

4. Remove lip seals (69, 81) from bearing frame (70) and

bearing cover (80) if worn. Discard.

5. Remove retaining ring (71).

6. Use bearing puller or arbor press to remove ball

bearings (74, 78).

DISASSEMBLY OF BEARING FRAME (4E AND 6E)

1. Drain bearing housing oil cavity by removing drain plug

(28) for oil lubrication bearing housing.

2. Remove capscrews (33) to disassemble bearing housing

(31) from bracket (67).

NOTE: Check gasket (8) if worn, replace it.

3. Remove the shaft assembly with bearings and bearing

carrier (110) out of the bearing housing (31).

4. Check both lip seals (42), replace if necessary.

5. Remove the snap ring (108) from the shaft (38).

6. Check the bearings. If they feel rough when turning by

hand, replace the bearings.

Reassembly

• All parts should be cleaned before assembly.

NOTICE: O-RING SHOULD BE REPLACED AFTER ANY

DISASSEMBLY OF UNIT.

WARNING

Hazardous voltage

can shock, burn or

cause death.

Hazardous Machinery

WARNING

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Xylem IM191 R03 Marlow Series Prime Line Self-Priming Ce User Manual Page 7

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