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Field Alignment Section 2


A. Pump

1. Set pump on pump mounting pads. Insert pump hold-down bolts but do not tighten.

a. If there is existing piping, line up pump flanges with pipe flanges. DO NOT CONNECT THE PIPING AT THIS POINT.

2. Level the pump off of the shaft extension. Do not level off of the pump casing flanges. Remember, the piping must come to the pump. You are aligning the pump shaft and the driver shaft. Shafts are the datum, not flanges.

a. Use a STARRET No.135 level to level the shaft.

b. Leveling the pump should be accomplished by shimming under the bearing frame toot.

B. Motor

1. Set the motor on the baseplate.

2. Using a straight edge, approximate the shaft alignment.

a. This will require setting shims of the same thickness under the motor feet; you are just trying to get dose so you can use the dial indicators. Get the rough alignment within 0.0625".

b. If the motor is higher, there is something wrong or it is a special case. This situation must be inspected. Do not shim the pump. The pump is connected to the piping and it will present difficulties with future work on the Installation.

c. Make sure you have the proper shaft separation.

3. Remove soft toot.

C. Alignment. (Reverse indicator Method)

1. Install reverse dial indicator tooling on shafts.

2. Measure and record the following dimensions on a worksheet, SA, Al, 10. These parameters are defined as follows:

a. SA = Distance between the dial indicators which are located at the respective planes of correction.

b. Al Distance between the adjustable plane of correction and the inboard foot of the adjustable machine.

c. 10 = Distance between the inboard foot and outboard foot of the adjustable machine.

2. Correct for dial indicator sag.

a. Remove dial indicator tooling from the unit.

b. Install reverse dial indicator tooling on a pipe or piece of round bar stock in the exact configuration that you removed it from the unit that is being aligned. The dial indicators must be set to the SA distance,

c. Zero the dial indicator while they are in the vertical up position.

d. Rotate the entire set-up 180o and record dial indicator readings. This is the sag, the correction will be made when you take the alignment readings.

3. Reinstall the reverse dial indicator tooling back to the configuration it was in Step 1.

a. The SA dimension must be held.