1. Remove the collector cover.
NOTE:
Follow the steps below when removing the collector cover.
(1) Pull up the two points at the rear (A).
(2) Pull up the two points at the front (B) while moving them forward.
2. Remove the reservoir tank. 
3. Remove the vacuum hose.
4. Remove the vacuum pump.
NOTE:
The vacuum pump cannot be disassembled.
5. Remove the O-ring from the chain cover.
