Canon C5500 Series Troubleshooting Manual page 41

2) Remove the spacer [1] and the timing belt [2].
3) Remove the timing belt [1] and replace with the new type 30T/40T pulley [2]. For Buffer Path Unit-G1, follow the above steps
and replace the 2 pieces of 30T/40T pulley.
4) Attach the parts by reversing the procedure from the step 2).
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