Goulds Pumps VIT - IOM - Manual (Page 22)

Install the threaded coupling
If you have a keyed coupling, see the Install the column section of this manual.
CAUTION:
Use Molykote Dow-Corning or an equivalent for all galling material such as 316 stainless steel.
Shaft threads are left hand.
1. Coat the threads with a light coat of oil for a non-galling material, or Molykote for galling material.
2. Install the threaded coupling onto the pump shaft by threading it on for one-half its length.
You can insert a fine wire in the drill hole at the center of the coupling that serves as a gauge in order
to determine when the coupling is correctly positioned on the pump shaft.
3. Remove the wire.
Column installation
This section describes how to install the two lineshaft options available for the column assembly:
• Open lineshaft
• Enclosed lineshaft
Install the open lineshaft
CAUTION:
Use Molykote Dow-Corning or an equivalent for all galling material such as 316 stainless steel.
The bearing retainer is integral with the column. The top flange of the column has a male register and the
bottom flange of the column has a female register.
1. Check the headshaft and lineshaft for straightness.
The average TIR should be less than 0.0005 in. (0.013 mm) per ft. (0.305 m) and not exceed 0.005 in.
(0.127 mm) for every 10 ft. (3 m).
2. Apply a thin film of oil to the lineshaft.
3. Install the coupling:
Shaft threads are left hand.
If your
lineshaft
coupling
is...
Then...
Threaded 1. Apply a thin film of oil to the coupling threads if it is a non-galling material. Use a
suitable anti-seize if the coupling is a galling material.
2. Manually start the thread until you feel resistance.
Use a fine wire inserted in the drill hole at the center of the coupling as a gauge to
determine when the coupling is correctly positioned on the shaft.
3. Remove the wire after you install the coupling.
4. Complete the joint using a pair of pipe wrenches, one on top of the pump shaft and
the other on the coupling.
5. Run the upper lineshaft into the coupling and hand-tighten.
Do not apply wrenches on the bearing journal surfaces.
For an illustration of the threaded coupling, see the VIT-FF product lube in the Parts List
chapter.
Installation (Continued)
20 Model VIT Installation, Operation, and Maintenance