1+ Front pump  
2+ .Pump seal  
3+ Washer  
4+ .Cylindrical pin  
5+ .O-ring  
6+ Intermediate plate  
7+ Screw plug  
8+ Sealing ring  
9+ Screw plug  
10+ Sealing ring  
11+ Hexagon head screw  
12+ Special washer  

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.