Alternator JFZ29018  Detail specifications:
System Voltage: 28 Volts
The largest ouput ampere: 12V/300A   24V/170A
Regulated voltage: 28±0.2V
Maximum RPM: 8000
Rotation:  Reversible
Weight: Approx. 50 kg
Enviromental Temperature:  -40° C--121° C 
Application :  CAT C9 C12; Commins L10 M11 & CSL series