Installation
Model 3410 Installation, Operation, and Maintenance Manual
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Only use this method if the face and outside diameters of the coupling halves are square and
concentric with the coupling bores. If this condition does not exist or elastomeric couplings do
not make this method convenient, then use the dial indicator method.
1. Check for angular alignment by inserting the taper or feeler gauges between the coupling
faces at 90° intervals.
The unit is in angular alignment when these four measurements are the same or are within
recommended tolerances.
2. Check for parallel alignment by placing a straight edge across both coupling rims on all four
sides.
The unit is in parallel alignment when the straight edge rests evenly across both coupling
rims in all four positions.
1. Feeler gauge
Figure 10: Incorrect angular alignment
1. Straight edge
Figure 11: Incorrect parallel alignment
1. Straight edge
2. Feeler gauge
Figure 12: Correct alignment
Align the pump using a dial indicator
Before you begin, you must have a dial indicator with a mounting magnet and extension bars.
A dial indicator can provide more accurate alignment than a straight edge.
1. Fasten the indicator stand or magnetic base to the pump half of the coupling.
2. Adjust the assembly until the indicator button is resting on the periphery of the other
coupling half.
3. Set the dial to zero and use chalk to mark the coupling half where the button rests. Then
place a separator between the coupling halves so that the bearing slack does not affect the
readings.
Chalk and separators are not necessary on the elastomeric couplings that have not been
disconnected.
4. Rotate both shafts by the same amount.