Dell 3130cn Color Laser Printer - Manual (Page 226)

4. Hold both sides of the belt unit with both hands and pull up the right side of the unit until the peg on the right side
comes out of the groove. Then, shift the belt unit to the right and remove the unit from the printer.
Installing a New Belt Unit
1. Unpack a new belt unit.
2. Insert the left peg into the corresponding left side belt unit hole, then align the right peg with the groove, and then
push down on the right side of the belt unit to seat into place.
3. Close the belt unit by pulling it down until it clicks.