1+ Air pump and clutch  
2+ .Air pump  
3+ .Clutch  
4+ .Outer circlip  
5+ .Circlip  
6+ .Nut  
7+ Vent cover  
8+ Hose  
9+ Hose  
10+ Worm drive hose clip  

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.