Npv Reassembly; Shv Disassembly; Shv Reassembly - Xylem GOULDS SHV Manuel D'utilisation

NOTICE: EXERCISE CAUTION IN HANDLING
HOT SHAFT EXTENSION.
NOTICE: INSPECT BUSHING, PUMP BEARING
AND SHAFT EXTENSION FOR EXCESSIVE
WEAR. REPLACE AS NECESSARY.
13. Remove motor bolts (8) and remove motor plate
from motor.
14. Remove U-cup seal (23) from motor plate and
discard.
NPV SERIES REASSEMBLY
All parts should be cleaned before assembly.
NOTICE: ALL O-RINGS SHOULD BE REPLACED
AFTER ANY DISASSEMBLY OF UNIT.
1. Check motor shaft for run out. Maximum
permissible is .002" TIR.
2. Install new U-cup seal in motor plate and install
motor plate on motor, torquing bolts to 15 lbs. ft.
3. Restrain motor shaft with appropriate tool. Apply
Loctite 7649 to shaft threads and allow to dry. Apply
LOCTITE #243 to motor shaft threads and install
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shaft extension by turning CLOCKWISE.
4. Apply LOCTITE #243 to support tube threads.
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Attach support tube to motor plate turning
COUNTER-CLOCKWISE.
5. Replace pump bearing, bushing and snap ring in
pump plate. Use LOCTITE
bushing in pump plate.
6. Install pump plate to support tube turning
COUNTER-CLOCKWISE.
7. While holding shaft from rotation with a
install impeller by turning it CLOCKWISE, insuring
that the impeller seats securely against the shaft.
8. Apply LOCTITE #243 to end of shaft and install
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impeller nut, turning CLOCKWISE.
9. Install guidevane and guidevane O-ring on SL models
only.
NOTICE: DO NOT LUBRICATE GUIDEVANE
O-RING. ENSURE IT IS NOT PINCHED BY THE
IMPELLER ON REASSEMBLY.
10. Install new casing O-ring and casing, torquing casing
bolts to 50 lbs. in.
11. Check reassembled unit for binding. If binding oc-
curs, realign casing over impeller eye.
12. Assembly is complete.
SHV SERIES DISASSEMBLY
Follow ALL warnings and instructions in the
"MAINTENANCE" section of this manual.
While complete disassembly of the unit will be described,
it is recommended that you proceed only as far as
required to perform the maintenance needed.
Remove mounting plate bolts from tank top.
Lift pump out of the tank with an adequately sized nylon
lifting strap or chain attached to the motor.
Remove the mounting plate and motor leg from pump
and motor.
#243 when installing
®
⁄ " wrench,
9
16
LIQUID END:
NOTE: PRIOR TO DISASSEMBLY PLEASE NOTE RE-
LATIONSHIP OF PUMP CASING, PUMP PLATE,
MOTOR PLATE AND SUPPORT TUBE. WHEN
PUMP IS REASSEMBLED THE BOLT CIRCLES
WILL HAVE TO BE LINED UP IN THE SAME
WAY TO INSURE THE CASING DISCHARGE
IS DIRECTLY OPPOSITE THE MOTOR FEET.
IT MAY BE HELPFUL TO MARK A LINE ON
THESE PARTS PRIOR TO DISASSEMBLY.
1. Remove casing (22) and casing O-ring (21) from
pump mounting plate (12).
2. While restraining impeller from rotating remove im-
peller bolt (20) and impeller washer (19) by turning
C.C.W .
3. Remove impeller (18) and key (17) from shaft.
4. Remove the three bolts which connect the tube
support (10) to the pump mounting plate (12).
5. Grasp the pump mounting plate and carefully slide it
out from the tube support and set it aside.
6. Remove snap ring (15) from pump mounting plate
and pull out bushing (14).
7. Carefully press out pump bearing (13A, 13B) with a
bearing or arbor press.
8. Remove shaft sleeve (16) from shaft extension (9).
9. Remove the three bolts (11) that connect the tube
support to the motor plate and then remove the tube
support from the motor plate.
10. Using (2) 1½ inch open end wrenches on the flats of
the shaft extension and the coupling (6), remove the
shaft by turning it C.C.W .
11. Remove coupling bolt (8) and coupling washer from
the motor shaft with a socket and extension.
12. Remove coupling and key (5) from the motor shaft.
13. Remove motor bolts (11) from motor mounting plate
(3).
14. Remove motor mounting plate from motor.
15. Remove U-cup seal (2) from motor mounting plate.
NOTICE: INSPECT BUSHING, PUMP BEARING
AND SHAFT SLEEVE FOR EXCESSIVE WEAR.
REPLACE AS NECESSARY.
SHV SERIES REASSEMBLY
All parts should be cleaned before assembly.
NOTICE: ALL O-RINGS SHOULD BE REPLACED
AFTER ANY DISASSEMBLY OF UNIT.
1. Check motor shaft to the following dimensions.
Reference NEMA standards for proper measurement
methods.
2. Maximum shaft runout - .002 inches.
3. Maximum eccentricity of mounting rabbet - .004
inches.
4. Maximum face runout - .004 inches.
5. Install new U-cup seal in motor mounting plate and
then install motor plate on motor with 4 bolts.
6. Place key in motor shaft and slide coupling on motor
shaft. Install bolt with washer and torque to 17 ft. lbs.
5