Porter-Cable 557 Instruction Manual page 13

A
Fig. 10
8. Continue to hold spindle lock button while using the hex wrench
(furnished with tool), to tighten blade retaining bolt securely, (by rotating
clockwise).
9. Rotate the "quick set" depth adjusting turret (A) Fig. 12, to the "FF"
position.
10. Lift safety lever (A) Fig. 13, fully retract the plunge mechanism, and
reposition the safety lever as shown in Fig. 14. Slowly release pressure
on plunge mechanism.
11. Reposition blade cover plate to tool, and secure in place with the four
retaining screws (removed in step 1).
DO NOT OPERATE TOOL WITHOUT BLADE COVER INSTALLED.
A
Fig. 13
B
A
Fig. 12
13
Fig. 11
A
Fig. 14