REPLACING THE DRIVING BLADE
The driving blade is sold separately or supplied as a complete
subassembly with the piston.
• Follow steps [1] & [2] of the section 'Disassembling the tool'
to remove the head assembly. Pull the cylinder out of the
main body if necessary. It is usually not necessary to
disassemble the head assembly.
• Pull-out the piston assembly.
• Remove any debris and assess condition of cylinder. If
marked or grouged, use a fine sand paper to smooth out
walls. The piston must be allowed to move without
restriction.
• Lock the piston in a vise, using a rag to prevent scoring.
Always use the top and bottom faces to secure the piston in
place.
• Remove the broken driver using a 1/2" closed-end wrench.
• Put one drop of medium strength adhesive sealant onto the
threads of the piston.
• Insert the P-622C lock washer and screw the new driving
blade onto the piston. Tighten very hard (140 lb
A
in minimum).
Make sure that the lock washer P-622C is completely
flattened.
Note: select the appropriate driving blade:
- use P-423 driving blade for the "L" or "T" nailers
- use P-237 driving blade for staplers
• Remove the bumper, inspect & remove debris.
• Reassemble tool following instructions in previous section.
