1     Back Bearing Housing  
2     Pump Casing       
3     Relief Valve   
4     Front Bearing Housing  
5     Driven Shaft                
6     Front Bearings             
7     Driving Shaft 
8     Mechanical Seals   
9     Screws                        
10    Mechanical Seals   
11    Bear Box       
12    Back Bearings
13    Timing Gears