My 620 has the 45 loader with factory double-acting cylinders on the bucket. I have converted the boom cylinders to double-acting as well. The attached photo show the hydraulic connections. Pressure to the loader valve is from the lower breakaway coupling and return from the valve is into the top of the reservoir. The Remote Cylinder Operating Lever is all the way back for loader operation. This setup works great.
I am considering buying a backhoe attachment and will need to hook up a separate pair of lines. I can't find enough information in the 620 Operator's Manual or the 45 Loader Manual to tell me for sure how this will work. I am thinking the pressure out to the backhoe valves will come off the upper breakaway coupling, and the return from the backhoe valves will need to go into a T with the return from the loader valve.
I'm hoping someone can confirm this for me, or tell me what will work. Thanks.
I am considering buying a backhoe attachment and will need to hook up a separate pair of lines. I can't find enough information in the 620 Operator's Manual or the 45 Loader Manual to tell me for sure how this will work. I am thinking the pressure out to the backhoe valves will come off the upper breakaway coupling, and the return from the backhoe valves will need to go into a T with the return from the loader valve.
I'm hoping someone can confirm this for me, or tell me what will work. Thanks.