Installation

Check for vertical alignment (parallelism) of coupled drive as follows:

1.Operate unit until normal temperature is reached (may require several hours).

2.Shut down motor and lock out switch.

3.Mount dial indicator as in Figure 2.

4.Rotate shaft, noting readings at 0°, 90°, 180°, and 270° (both sides, top, and bottom). If within 0.002 inch total indicator reading, or other limit specified by the factory, unit is satisfactory for operation.

5.If not within limits, add or remove shims as required to raise or lower motor.

6.If shims are changed for high temperature operation, repeat alignment procedure to extent necessary to assure proper alignment. Document readings for warranty information.

Figure 2. Check of Vertical Alignment

Vibration

The standard unfiltered housing vibration limits measured at no load, uncoupled, and with rigid mounting are as follows based on the requirements of NEMA MG1-7.8.

Speed

Velocity, inches/sec peak

1200 – 3600 RPM

0.120

1000 RPM

0.105

900 RPM

0.096

750 RPM

0.079

720 RPM

0.075

600 RPM

0.063

After alignment is complete and foot mounting bolts are tight, run motor at no load (or minimum possible). Check for vibration. If excessive vibration exists and the alignment is acceptable, check foot plane by loosening one drive end-mounting bolt at a time as detailed below. This is to be documented for warranty information. When resiliently mounted, allowed levels are 25% higher.

Base or foundation rigidity can also affect vibration; check for resonance in supporting structure.

Recheck alignment after any change in shims and document alignment readings for warranty information.

Completing Mechanical Installation

After controlling rotor end float and establishing accurate alignment, it is recommended to drill and ream the foundation plate and motor feet together for dowel pins. (See Doweling).

Recheck parallel and angular alignment before bolting the coupling together. Motor shaft should be level within 0.03 inch after alignment.

Doweling

Doweling the motor (and driven unit) accomplishes the following:

1.Restricts movement.

2.Eases realignment if motor is removed from base.

3.Temporarily restrains the motor, should mounting bolts loosen.

Inserting Dowel Pins

The following procedure is recommended:

a.Check the alignment after the unit has been in operation approximately one week. Correct as necessary.

b.Using pre-drilled dowel holes in motor feet as guides, drill into the mounting base.

c.Ream holes in the feet and base to the proper diameter for tapered dowel pins. Clean out the chips.

d.Insert dowel pins.

Force Feed Lubrication

If force feed lubrication is used, flush lubrication lines thoroughly to make sure the lines are clean before connecting lines to bearing housings. Be sure that bearing cavities are filled with oil to the proper level before starting. See motor outline drawing to determine proper oil level. Be sure that proper oil pressure and flow are provided by the supply system. Verify that the oil drain flow agrees with the factory requirements. The orientation and size of oil drain piping supplied with the motor must not be altered. Oil drain piping should be of the same size or larger from the motor piping to the oil sump. Piping must slope downward. Pressure build up in the drain line between the oil sump and the motor bearing housing can lead to oil leakage. Document readings for warranty information.

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