Xylem IM016S Series 3656SP - Manuel (Page 4)

4
Disassembly
• Follow ALL warnings and instructions in the
“MAINTENANCE” section of this manual.
1. Remove motor hold down bolts.
2. Remove casing bolts (371A).
3. Remove back pull-out assembly from casing (100).
4. Remove guidevane seal ring (349) and discard.
5. Remove casing/adapter gasket (351) and discard.
6. Remove guidevane screws (459) and guidevane (347) from
adapter.
6.1 Remove wear ring from guidevane (5 HP “H” only) if
excessively worn.
7. Insert a screwdriver into one of the impeller waterways to
restrain motor shaft from rotation and remove impeller
bolt (198). Discard.
8. Remove impeller washer (199), impeller (101), and
impeller key (178). If impeller is difficult to remove, insert
two pry bars between impeller and adapter, 180
° apart,
and CAREFULLY pry off impeller.
9. Remove motor adapter bolts (371) and adapter (108) from
motor, pulling with it the mechanical seal (383).
10. Push stationary seat of mechanical seal out of the motor
adapter and discard.
11. Inspect shaft sleeve (126), 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 index 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.
9. Remove any burrs caused by screwdriver on the periphery
of impeller in waterway passages.
10. Replace wear ring in guidevane (5 HP “H” only) if
removed. Replace guidevane, being sure that impeller hub
is not binding, tightening screws alternately and evenly.
Check impeller for binding by rotating the motor shaft by
use of a screwdriver slot or flats on the end of the motor
shaft (removal of the motor end plug or cover will be
necessary). If binding occurs, loosen screws, readjust
guidevane until impeller hub turns freely. Tighten screws.
11. Install new guidevane seal ring.
12. Install new casing/adapter gasket.
NOTICE: ENSURE CASING/ADAPTER GASKET
SURFACES ARE FREE OF DEBRIS OR
LEAKING WILL RESULT.
13. Install motor and rotaing assembly into casing, tighten
casing bolts alternately and evenly.
14. Replace foot bolts and motor end plug or cover.
15. Check for free rotation after assembly is complete.
16. Replace all drain plugs, using Teflon™ tape on male
threads.
17. Prime according to instructions in the “OPERATION”
section of the manual.