Xylem IM181 R01 Prime Line SP - Manual (Page 5)

5
DISASSEMBLY
• Follow ALL warnings and instructions in the
“MAINTENANCE” section of this manual.
1. Remove motor hold down bolts.
2. Remove suction flange bolts (16).
3. Remove suction flange (17).
4. Remove check valve assembly (15).
5. Remove casing bolts (12).
6. Remove back pull-out assembly from casing (1).
7. Remove diffuser (4) and diffuser seal ring (3).
Discard ring.
8. Insert a screwdriver into one of the impeller waterways to
restrain motor shaft from rotation and remove impeller
bolt (6). Discard.
9. Remove impeller washer (7), impeller (8) and impeller
key (14). If the impeller is difficult to remove, insert two
pry bars between impeller and adapter, 180º apart and
CAREFULLY pry off impeller.
10. Remove motor adapter bolts (12) and adapter from motor
pulling with it the mechanical seal (9).
11. Push stationary seat of mechanical seal out of the motor
adapter and discard.
12. Inspect shaft sleeve (13). If damaged or badly scored,
remove by heating with a torch. Discard.
NOTICE: EXERCISE CARE IN HANDLING HOT SHAFT
SLEEVE.
REASSEMBLY
• All parts should be cleaned before reassembly.
• Refer to parts list for description of replacement items.
Specify pump order number when ordering parts.
1. Inspect shaft, removing any debris or burrs.
2. When replacing shaft sleeve, apply new shaft sleeve’s bore
with LOCQUIC ® Primer N, or equivalent. Let parts dry
and then apply LOCTITE ® #262 on the same surfaces.
Slide new sleeve over shaft with a twisting motion, wipe off
excess. Let cure according to instructions.
NOTICE: MECHANICAL SEAL MUST BE REPLACED
WHENEVER SEAL HAS BEEN REMOVED.
FOLLOW SEAL MANUFACTURER’S
INSTRUCTIONS CAREFULLY.
3. If necessary, seat ring may be lubricated with water or
glycerin to aid in installation. DO NOT contaminate the
seal face. Fully and squarely install the stationary seat into
the adapter. With a clean cloth, CAREFULLY wipe the
seat face clean of debris. DO NOT damage the seal
seat face.
4. Reinstall the motor adapter on the motor, making sure that
the motor shaft does not dislocate or damage the stationary
seal seat.
5. Fully and squarely install the seal rotary assembly against
the stationary seat. Be sure rotating seal face does not drop
out of the holding collar and DO NOT damage seal face.
6. Install impeller key in shaft keyway. Mount impeller on
shaft and push until it bottoms.
7. Install new impeller washer.
8. Insert a screwdriver in a waterway passage of the impeller
holding it against rotation and install the new impeller bolt.
Torque to 20 lbs-ft (27 N•M).
9. Remove any burrs caused by screwdriver on the impeller
waterway passages.
10. Remove and replace the “o” ring (10) on the motor
adapter. Lubricate lightly with Parker “O” ring lube or
equivalent.
11. Locate the diffuser on the motor adapter with the stop
piece in the 12 o'clock position.
12. Locate the diffuser seal ring on the machined nose of the
diffuser and make sure it's pushed firmly into place.
13. Install motor and rotating assembly into casing, check the
position of the seall ring, tighten casing bolts alternately
and evenly. Torque to 37 lbs-ft (50 N•M).
14. Check impeller for binding by rotating the motor shaft.
If binding occurs, loosen bolts, readjust diffuser until
impeller hub turns freely. Tighten bolts again.
15. Place suction flange bolts through holes and locate check
valve assembly (replace if damaged) over bolts. Carefully
bolt suction flange on casing making sure check valve
assembly is positioned so that the rubber face is against the
angled face of the suction flange.
16. Replace motor foot bolts.
17. Check for free rotation after assembly is complete.
18. Replace all drain plugs, using teflon tape on male threads.
19. Prime according to instructions in the “OPERATION”
section of the manual.
DISASSEMBLY
REASSEMBLY