Goulds Pumps VIT - IOM - Manual (Page 40)

Tube diameter in inches (millimeters) Weight in pounds (kilograms) per foot of length
5.00 (127.00) 20.78 (9.43)
6.00 (152.40) 28.57 (12.96)
Tension the enclosing tube using the direct pull method
This method requires the use of a dynamometer scale and an adapter fitting to grip the tube. A tube
tension adapter is available through the factory.
1. Use a hoist to pull the upper end of the tube in order to obtain the predetermined tension value.
2. With the tension plate installed manually but not tightened, thread the special fitting onto the top of
the tube to full engagement.
3. Attach the dynamometer scale to the fitting, and connect the upper end of the scale to the hoist hook.
4. Operate the hoist hook to apply the required tension.
This pulls the tension plate off the discharge head.
5. Manually thread the tension plate in order to reset it.
6. Release the tension from the hoist.
7. Remove the dynamometer scale and special fitting.
Tension the enclosing tube using the wrenching method
If a dynamometer scale is not available, you can tension the tube by wrenching the tube-tension plate.
1. Make up a spanner wrench to straddle the projecting threaded tube end and engage the tube-tension
plate capscrew holes by two lugs.
2. Torque the tension plate to take all the slack out of the shaft tubing and induce a reasonable amount
of tension by turning the tension plate counterclockwise.
For tubing 2.50 in. (63.50 mm) and larger, a man's full strength on a 3 ft. (0.9 m) lever arm is
sufficient. For smaller sizes, you must utilize less pull.
Do not turn the tension plate clockwise to align the holes in the tension plate and discharge head.
Install the tension nut
CAUTION:
Be sure that the top of the enclosing tube does not interfere with the tension nut.
1. Install the capscrews in the tension plate.
2. Pour one pint of oil down the oil tube.
3. Install the packing in the tension plate.
4. Thread the tension nut and tighten it firmly against the packing.
5. Perform these steps if a packed-type tension nut is used for water flush:
a) Install the packing and packing gland.
b) Secure the packing and the packing gland with a stud and nut and finger tighten.
c) Install the line assembly and connect it to the flush liquid supply.
6. If the top of the tube interferes with the tension nut, determine the distance:
If the tube is... Then...
Too short Replace the tube with a longer tube of the correct length.
Too long Cut the tube to the correct length and re-thread it.
7. Reinstall and re-level the pump.
Installation (Continued)
38 Model VIT Installation, Operation, and Maintenance