Figure 4: Sub-base, top view
Figure 5: Sub-base, side view
1.
The sub-base should be supported on rectangular metal blocks or on metal wedges having a slight
taper. There should be support blocks or wedges on both sides of each foundation bolt. A gap of
about 19mm | 3/4" to 38mm | 1-1/2" should be allowed between the sub-base and the foundation for
grouting, see Figure titled
Sub-base, side view
.
2.
Adjust the metal supports or wedges until the shafts of the pump and driver and sub-base are level.
Check the coupling faces, as well as the suction and discharge flanges of the pump, for horizontal
and vertical position by means of a level. Check also for any internal rubbing in the pump. Correct, if
necessary, by adjusting the supports or wedges under the sub-base as required. In most cases, fac-
tory alignment will be regained by shimming under the sub-base alone. Provisions must be made to
support the discharge piping independently from the pump to prevent excessive loads and maintain
pump-driver alignment.
3.
The sub-base should be level to within 3 mm | 0.125" over the length of the base and 1.5 mm |
0.0875" over the width of the base. Bases anchored with conventional foundation bolts use shims
on both sides of the anchor bolts to level the base. The bolts which secure the pump sub-base to
the foundation should be 3mm | 1/8" to 6mm | 1/4" less in diameter than the holes in the sub-base
(hole size is shown on the certified installation drawing).
4.
Clean outside areas of sub-base that will contact grout. Do not use oil-based cleaners because
grout will not bond to it. Refer to grout manufacturer's instructions.
5.
Build a dam around foundation and thoroughly wet the foundation.
4.1 Preinstallation
18
Model AF (42"/1200mm/54"/60"/66") LM/LMR Bearings Installation, Operation, and Maintenance Manual