690's are all deere machines except for the cab, 490's, 790's, 890's are the deere-hitachi thing.
Deere built the e series wheel loaders and the 450,550 and 650 G dozers for hitachi. In return hitachi built the excavators for deere.
If memory is correct, the deere-hitachi excavators were assembled in South Carolina, the 690,s were all made and assembled in Iowa, except for the cab, that is a Hitachi component.
The 344e and 444e loaders are hitachi.
All deere machines use their own engine, the machines that deere built for hitachi went to hitachi without a engine.
Deere pump and valve electronic components (sensors, psi switches,etc...)
will usually cross over to a Hitachi number and vice versa. One exception to the rule is the pump and engine electronic control boxes, located behind the seat.
you can put a 790 e pump and engine controller in a ex 200-3 and it will run but machine will act funny, (slow arm for example) Just did this while troubleshooting a hitachi. I had good used deere controllers and thought that I had faulty hitachi controllers. Ended up being faulty wiring harness and pump controller in the hitachi.
ok, back to the 690, it is a deere only machine and a breed of its own, a very good and durable machine as well as the rest of the deere-hitachi joint venture lineup.