21 Operation and Maintenance Manual
MQ-150 Ballscrew Feed Unit
6.
For plain bore (non-bushing) style pulleys with a key drive, loosen set screw
above keyway on pulley. Slide off pulley.
7.
For plain bore pulleys with friction/bushing type coupling #12-856-1 (see
spindle pulley), loosen hex on friction coupling and remove pulley. When
replacing this coupling, use proper torque specs as shown on drawing 749-
901.
8.
For bushing style pulleys, loosen and remove (3) hex head screws in bushing.
Replace same screws into jackscrew holes in bushing and by tightening each
one a small amount in succession, the bushing will “pop” out of the pulley.
The pulley can then be removed. When replacing pulleys, make certain to
properly align pulleys and engage key properly in slot.
Replacing feed pulley and belt
1.
Follow steps 1 & 2 of
Removing motors
and steps 1 & 2 of
Removing quill
and ball screw assembly.
2.
Feed belt can be removed at this point.