2004 Yamaha G28-AZ "UMAX MEDIUM DUTY II" (CARB) Service a...
At the beginning of the run, the medium-duty G28-AZ of 2004 was assigned code G28AZ. Its service manual is Yamaha LIT-19616-G2-70.
Nothing about that part number is specific to this one car. The factory wrote it to serve the UMAX family from 2004 to 2009, so the same pages also cover the G28-AA, G28-AC, G28-AE, G28-AF and G28-AG medium-duty cars and the light-duty G27 range in carbureted and 48-volt DC-motor form.
The manual is organised by system, and each system is taken through inspection, removal, overhaul and reassembly with the factory's own specifications attached. Electrical faults are worked through with full wiring diagrams and a defined test order instead of guesswork. Anyone keeping a twenty-year-old utility car in service will find the torque tables and service limits the most-used pages.