On the
hyd's in a nutshell ag tractors have a cheaper open circuit design which means if the engine is running the hydraulic is flowing thru the valves and back to the tank (transmission cavity) Activating a valve lever blocks off some or all that continuous flow through the branch attached to the lever. The method of getting hydraulic flow from the first valve to the second etc is called power beyond. The dealer is simply attaching the backhoe to the 3pt valve output power beyond & a second hose to tank. Backhoe circuits are operated by its own valves. Either way power beyond or rear ports works if the rear port valve can be locked in an activated position. On my dozer the 2
hyd hoses must be connected when bh removed or the pump deadheads & stalls the engine.
On the tractor model comparisons there are basic price point leaders designed to compete with lesser known manufacturers and more deluxe models with more features at higher prices.
You need to do homework here as there are specific feature contents that may apply to your applications. Example: a cab option is a passenger seat on one model but not available another.
Deere is particularly bad at this making deluxe models without 3pt adjustable links. They are an extra cost option.
Pay particular attention to ballast as it applies to the backhoe option. You need ballast for traction but the bh may limit where & what you can do.
The devil is in the details.
