Reply To: Collab 2020: Modeling Heavy Equipment (Backhoe)
I have been looking up the interiors of CAT backhoes of 434E and familiar models, studying their layouts. 
Article: How Caterpillar Backhoe Loaders Work
Video: Backhoe General Controls
Video: Backhoe Starting and Travel
Video: How to: Operate a Wheel Loader
Video: CAT 420E Backhoe Tutorial