2009 Yamaha G28-AG "UMAX MEDIUM DUTY II" (CARB) Service a...
2009 closes out this generation of the medium-duty UMAX. The G28-AG carries code G28AG and is documented in LIT-19616-G2-70, the same volume Yamaha used from the start of the run.
Six model years sit in the book, 2004 through 2009, along with the earlier G28 variants and the light-duty G27 cars on both carburetion and 48-volt DC power. If you are servicing a late car with earlier ones in the same fleet, that single reference saves cross-checking.
- Factory disassembly and reassembly order
- Torque, clearance and service-limit figures
- Complete wiring diagrams
- Symptom-based troubleshooting charts
Check the plate reads G28AG, quote LIT-19616-G2-70, and you are working from the correct book. The engine, drivetrain, brake, steering and electrical chapters each take a system from inspection through overhaul to reassembly, and the specification you need is stated at the step where it applies rather than buried in an appendix at the back.