1+ Breather hose  
2+ Hose clip  
3+ Worm drive hose clip  
4+ Breather hose  
5+ Hose clip  
6+ Clip  
7+ Hose clip  
8+ Water hose  
9+ Water hose  
10+ Breather adaptor  
11+ Flange head screw  
12+ Pin  

The part numbers in the assembly image below relate to the product number in the table. Clicking on the part number will open up the relevant part details.