Xylem Bell&Gosset e-3530 Serie Manuel D'instructions page 5

5.2.4. Parallel misalignment - shafts with axis paral-
lel but not concentric. Place dial indicator
on one hub and rotate this hub 360 degrees
while taking readings on the outside diameter
of the other hub. Parallel alignment occurs
when Total Indicator Reading is .005", or less.
5.2.5. Angular misalignment - shafts with axis
concentric but not parallel. Place dial indi-
cator on one hub and rotate this hub 360
degrees while taking readings on the face of
the other hub. Angular alignment is achieved
when Total Indicator Reading is .005", or less.
5.2.6. Final alignment is achieved when parallel and
angular requirements are satisfied with motor
hold-down bolts tight.
Always recheck both alignments after
CAUTION
making any adjustment.
6. ROTATION:
6.1. Correct rotation is right-hand (clockwise when
viewed from the motor end). Switch power on and
off quickly. Observe shaft rotation. To change rota-
tion:
6.1.1. Single-phase motor: Non-reversible.
6.1.2. Three-phase motor: Interchange any two
power supply leads.
7. OPERATION:
7.1. Before starting, pump must be primed (free of air
and suction pipe full of liquid) and discharge valve
partially open.
Pumped liquid provides lubrication.
CAUTION
If pump is run dry, rotating parts will
seize and mechanical seal will be damaged. Do not
operate at or near zero flow. Energy imparted to the
liquid is converted into heat. Liquid may flash to va-
por. Rotating parts require liquid to prevent scoring
or seizing.
7.2. Make complete check after unit is run under op-
erating conditions and temperature has stabilized.
Check for expansion of piping. On frame-mounted
units coupling alignment may have changed due
to the temperature differential between pump and
motor. Recheck alignment.
8. MAINTENANCE:
8.1. Close-Coupled Unit. Ball bearings are located in
and are part of the motor. They are permanently
lubricated. No greasing required.
8.2. Frame-Mounted Units
8.2.1. Bearing frame should be regreased every
2,000 hours or 3 month interval, whichever
occurs first. Use a #2 sodium or lithium based
grease. Fill until grease comes out of relief fit-
tings, or lip seals, then wipe off excess.
8.2.2. Follow motor and coupling manufacturers'
lubrication instructions.
8.2.3. Alignment must be rechecked after any mainte-
nance work involving any disturbance of the unit.
All manuals and user guides at all-guides.com
9. DISASSEMBLY:
Complete disassembly of the unit will be described.
Proceed only as far as required to perform the mainte-
nance work needed.
9.1. Turn off power.
9.2. Drain system. Flush if necessary.
9.3. Close-Coupled Units: Remove motor hold-down
Frame-Mounted Units: Remove coupling, spacer, cou-
pling guard and frame hold-down bolts.
9.4. Disassembly of Liquid End
close-coupled units. Remove cap at opposite end
of motor. A screwdriver slot or a pair of flats will be
exposed. Using them will prevent impeller damage.
9.5. Disassembly of Bearing Frame
bolts.
9.4.1. Remove casing bolts (370).
9.4.2. Remove back pull-out assembly from casing
(100).
9.4.3. Remove impeller locknut (304).
Do not insert screwdriver between
CAUTION
impeller vanes to prevent rotation of
9.4.4. Remove impeller (101) by turning counter-
clockwise when looking at the front of the
pump. Protect hand with rag or glove.
Failure to remove the impeller in a
CAUTION
counter-clockwise direction may damage
threading on the impeller, shaft or both.
9.4.5. With two pry bars 180 degrees apart and
inserted between the seal housing (184) and
the motor adapter (108), carefully separate
the two parts. The mechanical seal rotary unit
(383) should come off the shaft with the seal
housing.
9.4.6. Push out the mechanical seal stationary seat
from the motor side of the seal housing.
9.5.1. Remove bearing cover (109).
9.5.2. Remove shaft assembly from frame (228).
9.5.3. Remove lip seals (138 and 139) from bear-
ing frame and bearing cover if worn and are
being replaced.
9.5.5. Use bearing puller or arbor press to remove
ball bearings (112 and 168).
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