Castle TSM-21 Serial 61076 to 64233 (Parker) Operator Manual - Manual (Page 24)

Pilot Drill Bit
ƒ Open the rear door and unplug the drill motor.
ƒ Locate the black T-Knob to the left of the drill motor at the top of the carriage (Figure
23). The black T-Knob is threaded onto a set screw that secures the Drill Motor.
ƒ Unscrew and remove the T-knob. Slide the motor slightly to the right until the set screw
clears the mounting hole, then lift the motor out through the rear door and change the
tooling.
Figure 23
22
ƒ When re-installing, position the set screw through the mounting hole. Make sure that
the motor’s power cable is pointing toward the floor of the machine. Reinstall and
tighten the T-knob.