Porter-Cable 4640 Troubleshooting, Maintenance, Driving Self-Drilling/Tapping Screws - Models

DRIVING SELF-DRILLING/TAPPING SCREWS – MODELS 4640

NOTE: Maximum size screws for use with this tool are #12 wood screws and 1/4" self-drilling/tapping screws.

These screws drill and tap their own hole as they are driven. This differs from self-tapping screws in that pre-drilled holes for tapping are not required. To drive these screws:

1.Install the proper nutsetter that fits the screw to the screwdriver.

2.Set the screwdriver for the correct rotation.

3.Start the screwdriver and insert the head of the screw in the nutsetter.

Do not exert pressure on the screw while performing this operation.

4.Place the end of the screw in the desired location and remove your fingers.

5.Apply forward pressure to drive screw until depth stop rests on the surface of the work. Adjust the depth stop so that the fastener head seats firmly on the work. Avoid seating the fastener too deep to prevent shearing off the head.

TO REMOVE SCREWS – ALL MODELS

1.Remove the Depth Stop Assembly.

2.Install a proper bit that fits the screw.

3.Set the screwdriver for reverse rotation.

4.Place the bit on the screw and apply forward pressure.

5.Start the screwdriver.

TROUBLESHOOTING

For assistance with your tool, visit our website at www.porter-cable.com for a list of service centers or call the Porter-Cable help line at 1-800-487-8665.

MAINTENANCE

CHECK CLUTCH CONDITION

DISCONNECT TOOL FROM POWER SOURCE.

Periodically, check the screwdriver clutch jaws for wear by removing the screwdriver mechanism housing (A) Fig. 5 from the power unit.

A

Fig. 5

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