Porter-Cable 7539 Instruction Manual page 13

OVERLOAD PROTECTION
MODEL 7538 is equipped with a thermal-
type circuit breaker (G) Fig. 10, located in
the top of the motor. This circuit breaker
will shut the motor "OFF" if the overload
is prolonged.
If the circuit breaker "trips", switch the
motor "OFF" and:
1. release the trigger switch (A) Fig. 9.
2. determine cause of the overload (i.e.
dull bit, low voltage, excessive feed
rate, etc.) and correct.
3. allow the router to cool for three
minutes.
reset the circuit breaker by pressing the "ON" end of circuit breaker.
4.
restart the router, using the instructions found in the section "TO START AND
5.
STOP ROUTER".
MODEL 7539 is equipped with an internal overload protector that will shut motor
"OFF" if the overload is prolonged.
If the motor stops during use:
1. release the trigger switch (A) Fig. 9.
2. determine the cause of the overload (i.e. dull bit, low voltage, excessive feed
rate, etc.) and correct.
3. allow the router to cool for three minutes.
4. restart the router, using the instructions found in the section "TO START AND
STOP ROUTER".
SOFT START
MODELS 7538 and 7539 have a "Soft Start" feature designed to minimize startup
reaction torque.
SPEED CONTROL (MODEL 7539 ONLY)
Five operating speeds from 10,000 RPM
to 21,000 RPM are available by moving
the speed selector knob (F) Fig. 11. Set
the speed prior to engaging the router
bit into work. To change the speed after
work has begun, stop the router, remove
the router from the workpiece, and adjust
the speed setting.
Confirm that the trigger switch is "OFF" before resetting the
circuit breaker to avoid accidental start-up.
MODEL 7538
F
13
G
Fig. 10
MODEL 7539
Fig. 11