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Maintenance (Continued)
WARNING – Turn off electrical power and air supply and disconnect power cord from electrical
supply before beginning maintenance. If power cord is not disconnected, severe injury to
personnel could result.
Figure 4-3 – Upper Drive Belt Replacement
Figure 4-2 – Lower Drive Belt Replacement
Box Drive Belt Replacement
Note – 3M recommends the replacement of
drive belts in pairs, especially if belts are
unevenly worn.
LOWER DRIVE BELTS
Figure 4-2
1. Remove and retain center plates (A) and four
screws.
2. Remove and retain side cover (B) and fasteners.
3. Loosen, but do not remove lock nut (C).
4. Loosen tension screw (D) until all belt tension is
removed.
5. Pull belt splicing pin (E) out and remove belt.
6. Place new belt over pulleys with laced splice at
top. Insert splicing pin. Note – Pin must not
extend beyond edge of belt.
7. Adjust belt tension as explained in
"Adjustments – Box Drive Belt Tension", Page 25.
8. Replace side cover and center plates and
secure with original fasteners.
UPPER DRIVE BELTS
Figure 4-3
1. Remove and retain center plate (A) and four
screws and plain washers.
2. Loosen, but do not remove lock nut (B).
3. Loosen tension screw (C) until all tension is
removed from belt.
4. Remove 4 screws on side of belt guard (D) and
slide belt guard out to expose belt.
5. Pull belt splicing pin (E) out and remove belt.
6. Place new belt over pulleys with laced splice at
top. Insert splicing pin. Note – Pin must not
extend beyond edge of belt.
7. Adjust belt tension as explained in
"Adjustments – Box Drive Belt Tension", page 25.
8. Replace front cover and belt guard(s) and
secure with original fasteners.