Xylem SP Serie Manual De Instrucciones página 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
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.
5.
6.
7.
8.
9.
10. Remove and replace the "o" ring (10) on the motor
11. Locate the diffuser on the motor adapter with the stop
12. Locate the diffuser seal ring on the machined nose
13. Install motor and rotating assembly into casing, check
14. Check impeller for binding by rotating the motor
15. Place suction flange bolts through holes and locate
16. Replace motor foot bolts.
17. Check for free rotation after assembly is complete.
18. Replace all drain plugs, using teflon tape on male
#262 on the same
®
19. Prime according to instructions in the "OPERATION"
Reinstall the motor adapter on the motor, making
sure that the motor shaft does not dislocate or
damage the stationary seal seat.
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.
Install impeller key in shaft keyway. Mount impeller on
shaft and push until it bottoms.
Install new impeller washer.
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).
Remove any burrs caused by screwdriver on the
impeller waterway passages.
adapter. Lubricate lightly with Parker "O" ring lube or
equivalent.
piece in the 12 o'clock position.
of the diffuser and make sure it's pushed firmly into
place.
the position of the seal ring, tighten casing bolts
alternately and evenly. Torque to 37 lbs-ft (50 N•M).
shaft. If binding occurs, loosen bolts, readjust diffuser
until impeller hub turns freely. Tighten bolts again.
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.
threads.
section of the manual.
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