3M -Matic 800asb Instructions And Parts List page 29

Maintenance
(Continued)
Figure 4-3 – Box Drive Assembly, Infeed End
4. Turn belt adjustment screws (G)
counterclockwise on both the upper and lower
tension assemblies until belt is loose. See
Figure 4-3.
5. Locate the belt lacing (joint) by turning the belt
manually. Remove the pin with pliers. Remove
and discard old belt.
6. Install the new belt around drive rollers and
insert new pin. Pin must not extend beyond
edge of belt.
Important – Before installing new drive belt,
check the belt inside surface for drive
direction arrows and install belt accordingly.
If no arrows are shown, the belt may be
installed either way.
Figure 4-4 – Box Drive Belt Tension Adjustment, Top View
7. To set drive belt tension, turn adjustment screws
(G) equally on both the upper and lower tension
assemblies. Turn the screws clockwise to
increase tension or counterclockwise to
decrease tension. See Figure 4-3.
Use a force gauge to pull the belt outward
25 mm [1 in] at midspan, as shown with a
moderate pulling force of 3.5 kg [7 lbs.].
See Figure 4-4.
8. Reverse procedures in Steps 1-3 (Figure 4-2) to
reassemble the drive belt assembly.
23