Xylem IMVIC R01 Model VIC Vertical Industrial Turbine Can Pumps User Manual

Page 16

IMPELLER ADJUSTMENT FOR ALL HOLLOW

SHAFT DRIVES
NOTE: Shaft adjustment up or down is accomplished by

turning the adjusting nut (604) Figure 8.

NOTE: There are five holes in the adjusting nut and

only four in the motor coupling. See Figure 8.

1. With shafting all the

way down and the

impellers resting on

their seats, turn the

adjusting nut (604)

in counter-clockwise

direction, thus lifting

the shaft, until the

impellers just clear their

seats and the shaft/

motor turns free by

hand. This removes

all deflection from the

shaft.

2. For enclosed impellers,

make another two turns

on the adjusting nut.

(3 turns for 12 thread/

inch shaft) Line-up

one of the holes in

the adjusting nut

with the nearest

hole in the driver

coupling. Insert

the capscrew

in the hole and

tighten it.

Figure 8

NOTE: 1.00” and 1.18” diameter shafts are 12 thread

per inch (tpi), 1.50" through 2.44" are 10 tpi, all

larger sizes are 8 tpi.

3. For Open Impellers, Align hole “A” in the adjusting

nut (604) and hole “C” in the driver coupling

(See Figure 8) or whatever similar holes are in like

position. If care is exercised, this will give an initial

impeller clearance of 0.001” to 0.003” depending

on shaft size or the pitch of the thread.

4. Insert capscrew into hole “B” provided these are

the nearest matching holes for counter-clockwise

rotation of adjusting nut, turn adjusting nut counter-

clockwise until holes “B” and “D” line up. This

gives 1/20 of a turn which is 0.004” on 12 tpi shaft

or 0.005” on 10 tpi shaft.

5. Normal impeller clearance for the open impeller is

considered to be 0.015” for the first 10 feet of the

column length and 0.010” additional clearance for

each 10 ft of length thereafter. This can be reduced

in some instances where is necessary, but should

not be attempted without consulting the factory or

factory serviceman is present.

INSTALLATION OF A SOLID SHAFT DRIVER
NOTE: When pump is supplied with a thrust pot, do

not secure driver to discharge head until after

the thrust pot and flexible coupling are installed.

Do not work under a heavy suspended

object unless there is a positive support

and safe guard which will protect personnel should a

hoist or sling fail.

The coupling between the driveshaft and the head shaft

may be a non-spacer type (see Figure 9), or a spacer type

(see Figure 10). The latter is used on pumps furnished

with a mechanical seal to permit servicing of the seal

without removal of the driver.

1. Attach a sling to the lifting lugs of driver, hoist

motor, inspect the mounting surface, register, and

shaft extension, and clean these surfaces thoroughly.

If any burrs are found, remove burrs with a smooth

mill file, cleaning thoroughly afterward.

2. Orient the motor conduit box in the required

position. Align the motor mounting holes with the

mating tapped holes on the discharge head. Lower

the motor until the registers engage and the motor

rests on the discharge head. Secure motor with

capscrews provided.

3. On drivers having a nonreverse ratchet or pins,

manually turn the driver shaft clockwise viewed

from the top until the nonreverse ratchet or pins

fully engage.

4. Lubricate motor bearings in accordance with

instructions given on lubrication plate attached to

the motor case.

NOTE: Please read and follow the motor manufacturer’s

instructions before lubricating the motor

bearings. Too much lubricant can cause the

bearings to overheat prematurely.

The motor must not be tested for direction

of rotation when coupled to the pump.

If pump should rotate in the wrong direction, serious

damage to the pump and motor would result. Also

serious injury to personnel could result.

5. Make temporary electrical connections according

to tagged leads or diagram attached to the motor.

Motor must rotate counterclockwise when viewed

from the top. See arrow on pump name plate. If

motor does not rotate counterclockwise, you can

change the rotation by interchanging any two leads.

6. Motor shaft end play adjustment: if required,

motor shaft end play shall be checked with a dial

indicator prior to connecting the pump coupling to

the solid shaft motor. Consult the applicable motor

manufacturers instruction manual for detailed

information on motor shaft end play.

(604) ADJUSTING NUT

LOWER IMPELLER

RAISE IMPELLER

MOTOR COUPLING

ROTATION

WARNING