Rotation; Operation; Maintenance; Disassembly - Xylem 3530 Serie Manual De Instruccion

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 con-
centric but not parallel. Place dial indicator
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. If
CAUTION
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 vapor. Rotating
parts require liquid to prevent scoring or seizing.
7.2. Make complete check after unit is run under operat-
ing 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 lubri-
cated. 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 fittings, 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.

9. DISASSEMBLY:

Complete disassembly of the unit will be described. Pro-
ceed only as far as required to perform the maintenance
work needed.
9.1. Turn off power.
9.2. Drain system. Flush if necessary.
9.3. Close-Coupled Units: Remove motor hold-down
bolts.
Frame-Mounted Units: Remove coupling, spacer, cou-
pling guard and frame hold-down bolts.
9.4. Disassembly of Liquid End
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 impel-
CAUTION
ler vanes to prevent rotation of 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.
9.4.4. 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. Disassembly of Bearing Frame
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 bearing
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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