Quincy Compressor QSI Series Instruction Manual page 110

Section VIII - Service Adjustments
Drive Coupling Alignment
QSI 245-750
These QSI units are direct coupled between the airend
and the drive motor through the use of a transition piece.
Realignment of the coupling is not necessary.
QSI 1000-1500
It is necessary to check and correct the coupling align-
ment between the compressor and the motor. This service
is vital to the life of the motor and compressor bearings
and must be performed after the unit has been installed
in its final location and prior to start-up. If the unit is
ever moved from its original site, the alignment must be
checked again. The QSI series compressors utilize a two
piece flexible element bolted to steel hubs on the com-
pressor motor shafts. The following steps will ensure a
properly aligned coupling:
108
1) Tag and lock out all power to the unit.
2) Remove coupling guard.
3) Unbolt and remove one-half (1/2) of the flexible ele-
ment. Leave the remaining half bolted to both steel
hubs.
4) Using one of the existing 3/8" bolt holes in the com-
pressor hub, attach a dial indicator mounting stud or
bolt in firmly.
5) Attach a dial indicator to the mount with the neces-
sary hardware to allow the indicator plunger to
contact the motor hub.
NOTICE!
Four viewpoints need to be checked. Angular
and parallel, as view from the top. Angular and
parallel, as viewed from the side.
Do not operate the unit without both coupling halves and
guards in place.
Quincy Compressor-QSI
®