Goulds Pumps NM3171 - IOM - Manual (Page 23)

DISASSEMBLY & REASSEMBLY
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Inspection And Parts Replacement Guidelines . . . . . . . . . . . . . . . . . . . . . . 18
REASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Impeller Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
DISASSEMBLY
1. Lock out power supply to motor.
s
! WARNING
Lockout driver power ro prevent accidental
start up and physical injury.
2. Shut off valves controlling flow from pump.
3. Disconnect coupling.
4. Disconnect motor and remove from motor
support (240).
5. Remove coupling hub.
6. Remove motor support (240) from adapter (106)
by removing screws (371 S).
7. Disconnect discharge pipe at the discharge
flange (195C).
8. Dismantle flow controls (when furnished).
9. Loosen and remove mounting plate to pump
support structure screws or bolts.
10. Disconnect flush lines (190).
11. Lift pump from sump and if possible,
disassemble in vertical position. If not, lay
horizontally on proper supports.
s
! WARNING
Operator must be aware of pump and safety
precautions to prevent physical injury.
s
! WARNING
Pump components can be heavy. Proper
methods of lifting must be employed to avoid
physical injury and/or equipment damage.
Steel toed shoes must he worn at all times.
SAVE ALL BOLTS, NUTS, SCREWS AND
MISCELLANEOUS HARDWARE.
THEY ARE OF ALLOY CONSTRUCTION FOR
CORROSION RESISTANCE.
12. Loosen pipe collar set screws (222J).
13. Remove casing/discharge pipe assembly
screws (371H).
14. Remove casing/discharge gasket (351A).
15. Remove casing/suction tail pipe assembly
screws (372A).
16. Remove suction tail pipe assembly (161) and
gasket (36OY).
17. Remove casing stud nuts (425).
18. Remove casing (100). It may be necessary to
GENTLY tap or pry casing loose from pump
cover (160).
19. Remove pump cover O-ring (4122).
20. Unscrew impeller (101) from shaft (122).
NOTE: Model NM 3171 impellers are threaded
onto the pump shaft and removal can be
difficult unless some means is used to hold
the shaft from turning.
21. Remove impeller O-ring (412A).
22. Remove and discard anti-rotation pin (445A).
23. Disconnect any column bearing flush tubing.
24. Unscrew impeller adjustment bolts (370D) and
bearing end cover to bearing housing screws
(37OC).
25. Remove bearing end cover (109) and O-ring
(496).
NM 3171 IOM 5/08
17