Barnes 3SE-HD Serie Manual De Instalación página 8

CAUTION ! - Pressure builds up extremely fast, in-
crease pressure by "tapping" air nozzle. Too much
pressure will damage seal. DO NOT exceed 10 P.S.I.
in motor housing
F-2) Impeller and Volute Service:
F-2.1) Disassembly and Inspection:
To clean out volute (25), disconnect power, remove hex nuts
(19) and lockwashers (18), vertically lift motor and seal assem-
bly from volute (25). Clean out body if necessary. Clean and
examine impeller (27) for pitting or wear, replace if required.
Inspect gasket (37) and replace if cut or damaged. If impeller
(27) requires replacing, remove jam nut (33). By placing a fl at
screwdriver in the slot of the end of the shaft to hold the shaft
stationary while unscrewing the impeller (27). Once impeller
(27) is removed, remove pull washer (40) and exclusion seal
E
(41) if damaged or cut.
N
G
F-2.2) Reassembly:
L Position exclusion seal (41) on shaft until it seats against the
stationary portion of seal (38). Place pull washer (40) on shaft
I
until it seats against exclusion seal (41). To install impeller (27),
S
clean the threads with loctite cleaner and screw impeller (27)
H
onto the shaft hand tight. Apply thread locking compound (46)
to shaft threads and install jam nut (33). Torque to 40 ft. lbs.
Rotate impeller to check for binding. Position gasket (37) on
volute fl ange and position impeller and motor housing assembly
over studs and onto volute (25). Apply thread locking compound
(47) to each stud (23). Place lockwasher (18) and hex nut (19)
onto studs (23) and torque to 24 ft. lbs. Check for free rotation
of motor and impeller.
F-3) Motor, Bearing and Seal Service
F-3.1) Disassembly and Inspection:
To examine or replace the motor (1), bearing (39) and shaft seal
(38), disassemble volute and impeller as outlined in paragraph
F-2.1. Drain oil from motor as outlined in paragraph F-1.3.
Position unit upright, using blocks to avoid resting unit on shaft.
Seal Assembly (38)
FIGURE 3
Exclusion Seal (41)
After removal of cord grip plate (9) or optional cable and box
assembly (15), per paragraph F-1.3, from motor housing (2)
remove cable lead wires from motor lead wires and temperature
sensor wires ( if equipped) from control cable, by disconnecting
wire connectors (11) and (53). Also disconnect ground screw
(45) from motor (1). The wiring connections should be noted to
insure correct connections when reassembling.
Motor - Remove the motor bolts and lift motor stator from motor
rotor and seal plate (24). Unscrew conduit bushing (30) from
seal plate (24) and lift motor rotor, shaft, bearing (39), rotating
portion of seal (38b), washer (28) and conduit bushing (30) from
seal plate (24). Check motor capacitor (3, single phase units)
with an Ohm meter by fi rst grounding the capacitor by placing
a screwdriver across both terminals and then removing screw-
driver. Connect Ohm meter (set on high scale) to terminals. If
needle moves to infi nity (∞) then drifts back, the capacitor is
good. If needle does not move or moves to infi nity (∞) and does
not drift back, replace capacitor (3). To test the optional tem-
perature sensor (51, optional), check for continuity between the
black and white wires. If found to be defective, contact a motor
service station or Barnes Service department. Inspect motor
winding for shorts and check resistance values. Check rotor for
wear. If rotor or the stator windings are defective, the complete
motor must be replaced.
CAUTION ! - Handle seal parts with extreme care.
DO NOT scratch or mar lapped surfaces.
Seal - Remove rotating member (38a), spring (38c) and
retaining ring (38d) from shaft. (See Figure 3). Examine all
seal parts and especially contact faces. Inspect seal for signs
of wear such as uneven wear pattern on stationary members,
chips and scratches on either seal face. DO NOT interchange
seal components, replace the entire shaft seal (38). If replacing
seal, remove stationary (38a) from seal plate (24) by prying out
with fl at screwdriver.
MOTOR END
(Inboard End)
Retaining Ring (38d)
Spring (38c)
Rotating Member (38b)
Stationary (38a)
Pull Washer (40)
PUMP END
(Outboard End)
8
Conduit Bushing (30)
Washer (28)
Seal Plate (24)