Porter-Cable 7539 Instruction Manual page 10

INSTALLING AND REMOVING THE BIT
accidental starting which could result in injury.
1. Place the router upside down on its
motor cap (see Fig. 1).
2. Clean and insert the shank of the
bit into the collet at least 3/4". If the
shank "bottoms" in the router, back it
out approximately 1/16" to allow for
proper tightening.
3. Place one wrench on the flats on the
chuck and one wrench on the collet
nut (see Fig. 1). Tighten firmly.
4. To remove the bit, reverse the
procedure. If the bit is difficult to
remove easily, tap the collet nut with
the wrench.
ADJUSTING PLUNGE DEPTH
1. Loosen the depth rod locking knob (K) Fig. 3, and the depth indicator knob
(J), allowing the depth rod (L) to contact one of the turret stops (M). Normally,
the deepest desired cut is set with the depth rod resting on the shortest turret
stop (see Fig. 4). The other two fixed stops (S) Fig. 6 provide reduced cutting
depths of 1/4" and 1/2" respectively. You can position the three adjustable
stops (R) Fig. 4 to any height and can use any combination of fixed and/or
adjustable stops to achieve the desired depths required.
2. Release the plunge mechanism by pulling the locking lever (C) Fig. 2 to the
left, and lower the plunge mechanism until the router bit touches the work
surface. Release the lever and push it to the right to lock the mechanism in
position.
3. Tighten the depth-rod locking knob (K) Fig. 3.4. Position the depth indicator
(H) Fig. 3 at the "O" position and tighten the knob.
5. Loosen the depth rod locking knob (K) Fig. 3, and raise the depth rod until
the indicator aligns with the graduation representing the desired depth of
plunge (The example in Fig. 5 shows setting for 1" plunge.) Tighten the depth
rod locking knob.
6. To limit the upward travel of the plunge mechanism: (1) release the plunge
lock by moving the plunge locking lever (C) Fig. 2 to the left, and move the
motor to the desired maximum height; (2) release and push the locking lever
to the right to secure the motor in this position; (3) use two 9/16" open-end
wrenches (not furnished) to move the travel-limiting nuts (O) Fig. 6 against the
top of the motor housing boss (T) Fig. 6. "Jam" the nuts together to lock.
Confirm that the power switch is in the "OFF" position and
that the tool is disconnected from the power source to avoid
Do not allow the wrenches to contact the columns (A) Fig. 1. If
the columns are damaged, the plunge action will be restricted.
Do not tighten the collet nut without a bit inserted to prevent
collet damage.
Disconnect tool from power source.
Set the travel limiting nuts so that bit can be retracted into base
of router, clear of work.
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