Bell & Gossett VTP2006 Series VTP – Vertical Turbine Pumps - Manual (Page 22)

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2. Using the lifting lugs on the motor, carefully lower
the motor onto to the motor stand of the thrust pot
(See Figure 18) and align the bolt holes.
3. Install the bolts finger tight.
4. Make temporary electrical connections according
to tagged leads or diagram attached to the motor.
Motor must rotate counter-clockwise when viewed
from the top. See arrow on pump name plate. If
motor does not rotate counter-clockwise, you can
change the rotation by interchanging any two leads.
Before beginning any alignment procedure,
make sure driver power is locked out.
Failure to lock out driver power will result in serious
physical injury.
ALIGNMENT OF FLEXIBLE COUPLING:
Alignment of the pump and motor is extreme importance
for trouble-free mechanical operation. Straight edge
alignment by an experienced installed proves adequate
for most installation.
1. Check for coupling alignment by laying a straight
edge across both coupling rims at four points 90
degree apart.
2. Move motor until straight edge rests evenly at each
position. Repeat procedure until correct alignment is
achieved.
3. Install flexible sleeve between the hubs per the
manufacture’s instructions.
4. Tighten all motor bolts.
NOTE: Be sure the relief fitting (#11 in Figure 18) is
clear of paint or any other obstructive material.
Otherwise it will cause premature failure of the
thrust pot and is not covered under warranty.
Figure 18 – Grease Lubricated Thrust Pot
INSTALLING THE OIL LUBRICATED THRUST POT
If the unit is supplied with a thrust pot (see Figure 19),
the thrust pot should be installed on top of the discharge
head or motor stand before installing the driver. The
driving mechanism of the thrust pot assembly is similar
to the hollow shaft motor. (See Figure 12)
1. Attach a sling to the thrust pot assembly through
the windows on the motor adapter and hoist the
assembly over the top of the discharge head.
2. Clean the mounting face of the discharge head
and the thrust pot. Lower the thrust pot assembly
and orient it so that the bolt hole on the base of
the thrust pot and the top flange of the discharge
head are line up. Install all the bolts to secure the
assembly to the discharge head.
3. Lower the drive shaft through the quill of the thrust
pot assembly to meet the shaft coupling. Apply a
thin film of oil to the head shaft thread and screw
into the shaft coupling.
4. For unit with mechanical seal and flanged coupling,
install the spacer flange coupling as instructed on
page 20.
5. Install the gib key (#16) into the drive shaft and the
hollow shaft clutch.
6. Install the adjusting nut (#17) to hand tight.
7. With shafting all the way down and the impellers
resting on their seats, turn the adjusting nut (#17)
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.
8. For enclosed impellers, if pump setting is 200 ft or
less, make another two turns on the adjusting nut
for the first 100 ft (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.
NOTE: 1.00” and 1.18” diameter shafts are 12 threads
per inch. All the larger sizes are 10 threads per
inch.
WARNING
ITEM DESCRIPTION
1 Motor stand
2 Head shaft
3 Bearing shell
4 Top seal
5 Snap ring
6 Lock nut
7 Lock washer
9 Lower seal
10 Grease lube fitting
11 Grease relief fitting
12 Hex tap bolt
13 Hex nut
14 Hex capscrew