Installation and Operation Manual
SA-07-11-87, Rev A
44
January 2019
Shimming
Shimming
Both configurations (Extended Shaft Motor & Bearing Box) of the LMV-803Lr require controlling the
clearance on the front and backside of the impeller. The tolerance of each clearance is
.060 +/- .010”
(1.5 0+/- .25 mm).
Fig. 10. Impeller Clearance and Shim Locations
Fig. 11. Back Clearance Measurement
Build the unit up to the installation of the impeller [Section 1.10 of Assembly (All Configurations)] but DO
NOT install o-rings at this time in the impeller and inducer. Measure with feeler gages the clearance
between the impeller and the upper cover at the outside diameter. Measure in multiple places and use the
lowest reading.
Clearance Back
Clearance Front
Measure
Cover Shim
SH06MK02
Impeller Shim
SH06MK01
