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Pre−Installation Checks
and installation practices.
Caution:
Sleeve bearing motors are shipped without oil. To avoid motor damage, do not rotate the shaft
until you have filled the oil reservoirs to the proper level with recommended lubricant.
Sleeve bearing motors are shipped without oil. Fill the oil reservoirs to the proper level before rotating the
shaft. Failure to observe this precaution could result in damage to or destruction of the equipment.
Before shipment, every motor is given a running test to check operation. Although complete factory tests
have been made, motors should be checked for any change resulting from improper handling during
shipment, storage, installation or by an unsatisfactory foundation. Failure to check or do the necessary
work as mentioned above, could cause misalignment resulting in vibration and premature bearing failure.
Before the motor is checked for alignment, remove all shipping blocks and supports installed at the
factory. The shaft should turn over freely. The degree of accuracy required in the alignment depends on
the rated speed of the machine. The greater the speed, the greater the care and accuracy necessary in
the alignment.
The motor must be level to maintain the proper oil level. Check the driven equipment to make sure that
the motor will be coupled to a level shaft. If necessary, level it up before coupling.
Grouting
A good quality commercial non−shrinking type of grouting compound should be used between foundation
concrete and all sole poles.
Doweling & Bolting
foundation. This will maintain the correct motor position should motor removal be required. (Baldor motors
are designed for doweling.)
1.
Drill dowel holes in diagonally opposite motor feet in the locations provided.
2.
Drill corresponding holes in the foundation.
3.
Ream all holes.
4.
Install proper fitting dowels.
5.
Mounting bolts must be carefully tightened to prevent changes in alignment. Use a flat washer and
lock washer under each nut or bolt head to hold the motor feet secure. Flanged nuts or bolts may be
used as an alternative to washers.
Coupling
Caution:
Do not use the coupling to compensate for poor alignment. This can result in vibration, noise,
coupling wear, overloaded bearings and early failure.
1.
In preparation for making the coupling alignment, wash off the rust−protective compound on the
motor shaft and factory−installed couplings with solvent.
2.
Fill oil sumps with the recommended oil to the proper level before mounting the coupling.
3.
The couplings should be heated for proper mounting. Do not press or drive couplings onto the shaft.
Coupling Alignment
There are a number of different procedures in alignment of the motor to the driven equipment. The end
result depends upon the accuracy of the parts in roundness, flatness, runout of the reference surfaces,
rigidity of the mounting and the skill of the set−up−person. The motor base surfaces must be flat and
parallel to the shafts. Make allowance for inserting shims under the motor to make the elevation
adjustment. The size of the shims' should be the full length of the motor foot pad, they should be flat, and
free of any burrs. Insert the shims carefully to maintain the foot plane and to avoid bending or twisting the
motor frame. For a poor mounting surface, it may be necessary to machine a shim to compensate for the
slope or surface irregularity. To minimize soft stacking and sponginess associated with excessive layers,
use the thickest shim stock combination with the fewest shims.
Refer to accepted procedures for coupling alignment such as double−dial indicator or laser alignment.
Coupling alignment shall be within the following limits:
S
MAXIMUM PERMISSIBLE ANGULAR MISALIGNMENT = .001 inch per inch of coupling hub diameter.
S
MAXIMUM PERMISSIBLE PARALLEL MISALIGNMENT = .002 inch TIR (Total Indicated Runout).
2-2 Installation & Operation
This Manual:http://www.manuallib.com/baldor/mn409-large-ac-motors-handbook.html
The assurance of successful start−up depends upon the use of good handling, inspection,
After proper alignment is verified, dowel pins should be inserted through the motor feet into the
MN409
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