13-17-601 Page 58
8-2
·
After engaging each hub on the matching recesses of the coupling element, check that the gap
between the hub flats (see dimension
“E” on Figure 8-2) is no less than 1.10/1.18 inches (28/30
mm) A smaller gap will produce abnormal wear of the element by friction and excessive thermal
expansion
– the latter could cause compressor damage by axially displacing the input shaft.
Make sure that keys are in proper alignment with key-ways on hubs.
Figure 8-2 – COUPLING ELEMENT
·
Apply a thread-locking compound to the hub set screws (M8 size) and tighten to 88.5 lb-in
(10 N-m) of torque. Reinstall coupling guard with provided fasteners.
4.
For hub-to-shaft interference fit hubs, main drive motor removal is necessary.