5.13.2 REMOVING / INSTALLING THE DRILL MOTOR:
1. Disconnect power and air from the machine.
2. Unplug the motor.
3. With your left hand loosen the T-Knob until it releases the Drill Motor. Use your right
hand to lift the motor back and then out the rear door.
4. When re-installing, make sure the motor mounting bolt aligns with the mounting hole at
the top of the carriage. Make sure the drill’s power cable is pointing down.
5. Tighten the black T-Knob onto the mounting bolt.
6. Manually rock the Motor Carriage toward the front of the machine and make sure that the
Drill Bit cleanly fits through the hole on the face plate.
5.13.3 SERVICING THE DRILL MOTOR:
1. The motor is warranted for one year from the purchase of the machine.
2. Warranty replacement and parts purchases can be handled by your nearest Porter Cable/
Bosch dealer or service center, or Castle.
3. Follow the instructions found in your Porter Cable/Bosch manual on maintaining the
motor. This includes information on keeping the motor clean and free of dust, maintaining
the brushes and replacing the tooling.
4. The Drill Motor has two electrical brushes that should be periodically replaced.
Note: During assembly at Castle, the front housing of the drill motor is rotated 90 degrees
to orient the power cord straight down relative to the T-Knob bolt hole. Replacement
motors obtained through sources other than Castle may need to have the front
housing rotated similarly.
5.14 Drill Settings and Bit Depth 21.41
The TSM-21 is designed to handle many types and thicknesses of material. Depending on screw
type and length, and the thickness of the material, the drill collet setting may need to be
adjusted. If the drill bit appears blackened or burned it is spending too much time boring the Pilot
Hole and may overheat and loosen in its shank
TSM-21 Diagnostic Manual Parker/Humphrey Solenoids
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