Drive Blade and Disassembly of the Model 45 & 45R Powernailer.
| Place the nailer in a padded vise. |  |
| Using pliers, straighten the cotter pin on the tapered side of the #5 roller pin. |  |
| Remove the cotter pin by tapping it out.
Save the cotter pin for reinstallation. |
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| Tap and drive out the #5 roller pin. |  |
| Remove the plunger head, plunger spring and plunger spring pin by lifting straight out of the body. |  |
| Slide off the rubber blade retainer, drive blade and plunger spring. |  |
| To install a new drive blade, look for the milled T-slot on the plunger head. |  |
| Driving blade is stamped "FRONT". Insert the new driving blade with the stamped face upward. |  |
| Locate the label on the rubber retainer. Writing will be facing down towards the nailer body. |  |
| Slide the rubber blade retainer over the new drive blade. Push it flush to the underside of the plunger head. |  |
| Add the plunger spring and spring pin to the plunger. |  |
| Line up the slot on the spring pin with the drive blade which will face the front of the nailer. |  |
| Slide all components into the top of the nailer body. |  |
| Slide the #5 roller pin into the nailer while holding the plunger down. |  |
| Slide the cotter pin through the tapered end of
the #5 roller pin. Wrap the cotter pin legs to secure it in place. |
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