Goulds Pumps VIT - IOM - Manual (Page 49)

Hold the hub in this position.
5. Insert the alignment ring into the register in the pump hub.
6. Slide the driver hub towards the pump hub until the driveshaft threaded ring is fully seated in the
register in the driver hub.
7. Insert all the coupling hub capscrews and hex nuts and hand-tighten only.
8. Measure the gap between the coupling hub faces.
In a properly assembled coupling, the gap will be between 0.014 in. and 0.026 in. (0.35 mm and 0.66
mm). This ensures that the threaded rings are properly clamped.
If the gap is not correct:
a) Disassemble the coupling.
b) Check that all parts are clean and free of foreign matter.
c) Reassemble the coupling.
The alignment ring will be compressed between the coupling hubs.
9. Tighten all coupling hub capscrews.
Complete the hollow-shaft driver installation
CAUTION:
Never check the motor rotation with the drive coupling in place. The bore clearance between the drive
coupling and the pump shaft OD is close enough that if the motor spins while this shaft is stationary, then
galling and locking together is likely to occur.
1. Remove the sling and see if the drive shaft centers inside the driver quill within 0.010 in. (0.25 mm).
If it does not, this indicates misalignment. Perform these steps:
a) Check to see if you have a bent drive shaft, burrs, or foreign matter between the shaft ends or any
of the mounting flanges:
• Driver-to-driver support
• Driver support to discharge head
• Discharge head to sub-base or foundation
b) Check to see if the sub-base and discharge head are level.
If it is not, shim between the sub-base and the discharge head in order to correct the problem.
c) Check the concentricity of the motor-to-motor stand to discharge head.
2. Connect the electricity and check that the motor rotation is counterclockwise when viewed from the
top.
See the arrow on the pump nameplate. If the motor does not rotate counterclockwise and you have a
three-phase motor, change the rotation by interchanging any two leads. For single-phase motors, refer
to the instructions from the motor manufacturer.
3. Install the motor-drive coupling:
a) Insert ratchet pins if you are using a non-reverse ratchet.
b) Match the coupling lugs with the corresponding holes in the motor.
c) Pull down the hold-down bolts evenly.
d) Make sure that the drive coupling is properly seated in the register fit.
4. Fit the gib key into the keyway so that there is a snug, but sliding, fit.
Make sure that you can remove the key with gentle leverage using a screwdriver.
5. Make sure that the gib key is not so high that it prevents the adjusting nut from seating on the drive
coupling.
6. Install the adjusting nut and hand tighten.
Installation (Continued)
Model VIT Installation, Operation, and Maintenance 47