Page 126 - Machinery Component Maintenance

Machinery Foundations and Grouting 109

removed and the holes degreased and filled with epoxy or sealant. The
jack screws are greased prior to installation to facilitate removal.
Baseplate leveling begins with the pump and driver removed, after
checking the pump suction and discharge flanges for proper location and
elevation. Piping should not be attached to the pump until the baseplate
has been leveled, grouted, and the driver/pump aligned. The piping
comes to the pump, not the pump to the piping. The use of a good ma-
chinist's level mounted on the machined surfaces for the driver is illus-
trated in Figures 3-24 and 3-25. The jack screws and anchor bolts are
adjusted until a level of 0.0005 in./ft is obtained in two directions 90"
apart. The machined surfaces for the pump receive the same treatment,
with a maximum elevation variation across the length of the baseplate of
0.010 in. A precision-ground bar should be used across the mounting sur-
faces to check for coplanarity. The mounting surfaces should be coplanar
within 0.002 in.
If the baseplate is long (over 15 ft), an optical level similar to the one
shown in Figure 3-26 might be used to speed up the leveling operation.
Once the baseplate is leveled, the grouting operations can begin. If epoxy
grouting is to be done during hot weather (above 90"F), it should be

Figure 3-24. A precision-ground square steel bar and a Starrett 98 machinist's level are
used to obtain a baseplate level of 0.0005 in./ft in the axial direction.