Signode Little David LD16AE 2.0 Operator's Manual page 72

Maintenance:
 Application / Wipe roller replacement:
Roller replacement is a tool less procedure. Simply push down on
retaining pin and slide roller off the shaft. Install new roller by lining the
angular pin notch on the undercut side of the roller with the retaining pin.
Then push the roller onto the shaft all the way until the retaining pin
protrudes through other side of the roller and extends out to hold the
roller in place. Take caution to install replacement roller with undercut
facing toward arm away from retaining pin. Refer to figure 11.
Figure 11
Retaining pin
 Knife blade replacement:
Knife blade replacement is a tool less procedure. Simply push down on
release bar and pull knife blade out. Fold back the knife guard by first
rotating the front roller arm inward towards the rear wipe arm. Then