5.13 Drill Motor Operation 21.40
The Drill Motor has its own power switch located on the motor body. This switch should always
be in the ON position. Drill motor operation is controlled by the Power Switch on the machine. If
your machine is equiped with a variable speed drill motor( Bosch PR20EVS), the variable speed
rotatory selector on the end of the router should be on the highest setting.
Warning: Do not run the motor for more than two hours at a time. The motor requires a ½ hour
cool down period after each two hour period.
The Drill Motor is attached to the Motor Carriage by a bolt that is secured with a black T-Knob.
This bolt may become loose due to vibration causing inconsistent pilot hole boring and/or
frequently broken drill bits.
5.13.1 TIGHTENING THE DRILL MOTOR:
1. Open the rear door.
2. The Drill Motor is mounted on top of the yellow Motor Carriage. See Fig 14.
Drill Motor
Drill T-Knob
Fig 14
3. Locate the Drill T-Knob on left side of the Motor Carriage.
4. Gently rock the Drill Motor as you tighten the T-Knob
TSM-21 Diagnostic Manual Parker/Humphrey Solenoids
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