This is how to get all the air trucks moving to u
1. Go to options Display , Traffic. Then make the AIrport traffic is at very - low minimum. If its on Non at all u wont get the baggage truck etc.
2.Next turn off ur engings, then open the main door by holding Shift + e Together. Next press Shif + e Then after u do that qwickley press 2 to open the baggage door.
3.(A gree message at the top saying cargo door open DOSE NOT APPEAR SO CHEAK FOR UR SELF TO SEE IF ITS OPEN) and give it a few secs and u will have baggage truck ETC.
4.For the fuel truck hold Shift + F
Hope this helps all