4.1.3.5 Install the pump, driver, and coupling
1.
Mount the driver on the . Use applicable bolts and hand tighten.
2.
Install the coupling.
See the installation instructions from the coupling manufacturer.
4.1.3.6 Alignment checks
When to perform alignment checks
You must perform alignment checks under these circumstances:
•
The process temperature changes.
•
The piping changes.
•
The pump has been serviced.
Types of alignment checks
Type of check
When it is used
Initial alignment (cold alignment)
check
Prior to operation when the pump and the driver are at ambient temperature.
Final alignment (hot alignment) check After operation when the pump and the driver are at operating temperature.
Initial alignment (cold alignment) checks
When
Why
Before you
This ensures that alignment can be accomplished.
After you
This ensures that no changes have occurred during the .
After you connect the piping
This ensures that pipe strains have not altered the alignment.
Final alignment (hot alignment) checks
When
Why
After the first run
This ensures correct alignment when both the pump and the driver are at op-
erating temperature.
Periodically
This follows the plant operating procedures.
4.1.3.7 Alignment measurement guidelines
Guideline
Explanation
Rotate the pump coupling half and the driver coupling half together
so that the indicator rods have contact with the same points on the
driver coupling half.
This prevents incorrect measurement.
Move or shim only the driver in order to make adjustments.
This prevents strain on the piping installations.
Make sure that the hold-down bolts for the driver are tight when
you take indicator measurements.
This keeps the driver stationary since move-
ment causes incorrect measurement.
Make sure that the hold-down bolts for the driver are loose before
you make alignment corrections.
This makes it possible to move the driver when
you make alignment corrections.
Check the alignment again after any mechanical adjustments.
This corrects any misalignments that an adjust-
ment may have caused.
4.1.3.8 Attach the dial indicators for alignment
You must have two dial indicators in order to complete this procedure.
4.1 Pre-installation
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Model Trash Hog II Installation, Operation, and Maintenance Manual
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