Instruction 2111-801C
01-04
10
REPAIRS
IF PUMP REQUIRES CLEANING:
Removable hand hole covers are provided on the pump Volute (28). To clean pump, disengage disconnect
switch, lock out, close all valves, drain the pump, remove cleanout cover (51) and remove any solids.
DISASSEMBLY PROCEDURES:
Refer to Cross Section Drawing, page 11.
CAUTION-PRIOR TO DISASSEMBLING UNIT, LOCK OUT MOTOR AND DISCONNECT MOTOR LEADS.
TO REMOVE MOTOR:
Pedestal Mounted Pumps:
1.A Remove cap screws, nuts and washers (49). Lift motor with motor support (43) off of bearing housing (10).
Coupling halves will separate and coupling insert can be removed. Motor half of coupling can be taken off
of motor shaft by removing coupling set screw(s) (not shown). To separate motor from motor support (43)
remove cap screws and washers.
Horizontal Pumps:
1.B Disconnect flexible coupling and motor leads, remove bolts from motor feet, and remove motor from base
plate.
NOTE:
It may be necessary to use a sling and hoist to aid in disassembling a horizontal unit. Be careful to
keep unit balanced when removing bearing housing/ impeller from volute.
Line Shaft Driven Pumps:
1.C Removal of motor is not necessary. Disconnect shafting flange at pump and swing shafting out of the way.
NOTE
: Additional protection must be provided in order to eliminate the possibility of drive shaft coming
apart at the spline connection (slip joint). The slip joint can be supported by using a rope to tie both
sections of the shafting together.
BEARING FRAME DISASSEMBLY:
2.
Remove cap screws and washers (19). Using a pry bar, break the joint between casing cover (23) and
volute (28) at gasket (24). Lift complete upper assembly including impeller (27) from volute (28). Place
entire assembly on blocks with shaft horizontal and with impeller and pump half of coupling overhanging.
Remove coupling half by removing set screw(s) (not shown).
3.
Inspect suction wear ring (80) if provided, by viewing through volute (28). If replacement is necessary, re-
move screws (81) to extract wear ring (80). Impeller wear ring (54) can be visually inspected while
bearing frame assembly is on blocks. Impeller wear ring (54) can be removed by taking out screws. It may
be necessary to apply heat to screws to facilitate removal.
4.A (#4 Frames) Remove impeller locknut and washer (20) off stud. Because of the tapered shaft fit, impeller
(27) can be easily removed by placing a wedge between the impeller (27) and casing cover (23) and
"popping" impeller off of shaft (1). Remove key (25).
WARNING: IMPELLER MUST BE INDEPENDENTLY SUPPORTED PRIOR TO ITS REMOVAL.
4.B (#5 & 6 Frames-Figures 2). Remove impeller set screw (26) and remove locknut (20) off of threaded shaft
end. Proceed as 4A above.
PACKING DISASSEMBLY:
5.A Back off gland nuts (17) and remove stuffing box gland halves (16). Remove nuts and washers (125) from
studs and pull stuffing box (120) off shaft. Packing rings (31) and seal ring (32) may then be removed
from stuffing box. If the shaft area surrounding the water slinger (13) is corroded, polish with a fine emery
cloth before sliding water slinger (13) off shaft. Polish and oil remainder of shaft in this area to prevent
damage to grease seal (12) when shaft is pulled through.
