0+ (Unillustrated Parts)  
1+ Vacuum tank  
2+ Non return valve  
3+ Stepped hose  
4+ Tube connector  
5+ Breather hose  
6+ Hexagonal nut  
7+ Spring washer  
8+ Spacer  

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.