0+ (Unillustrated Parts)  
1+ O-ring  
2+ Sump adaptor  
3+ Setscrew  
4+ Plain washer  
5+ Serrated washer  
6+ Engine oil dipstick  
7+ Engine dipstick tube  
8+ Dipstick location tube  

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.