1+ Auxiliary shaft and sprocket  
2+ Housing  
3+ .Bush  
4+ Auxiliary shaft bearing gasket  
5+ Cap screw  
6+ Thrust washer  
7+ Circlip  
8+ Oil seal  
9+ Auxiliary shaft driving dog  
10+ Spirol pin  
11+ Setscrew  
12+ Auxiliary shaft kit  
13+ .Driving gear  
14+ .Steering pump coupling  

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.