MUTOH Rockhopper II series Maintenance Manual page 218

Step 2 :
If the tension of the steel belt is not within the range of regulated values, adjust the steel belt
tension screws.
1 = Steel belt
3 = CR slave pulley
Step 3 :
Move the CR cursor to the left and right once or twice. Adjust the CR driven pulley until the
upper and lower margins are identical.
Caution :
If the tension is not equivalent across the entire belt, it could snap during operation.
Rockhopper II series printers – Maintenance Manual
2 = Steel belt tension screw
219 AP-74065, Rev. 1.2, 27/09/04