1+ Control valve  
2+ Roller and spring  
3+ Metal ball  
4+ Gearbox gasket and seal kit  
5+ Valve body spacer plate  
6+ Retaining ring  
7+ Accumulator piston  
8+ Oil seal  
9+ Accumulator piston spring  
10+ Governor pipe  
11+ Governor screen  
12+ Gearbox gasket and seal kit  
13+ Solenoid  

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.