Want Ballast Box Size Recommendations

[Usta]

How much weight should I plan on putting on the 3PH as counter weight ballast for loader work? Thinking of welding up a combination weight/tool box and wondering what size box to build.
Moving dirt with my Kubota BX2660 48" FEL bucket. With a full bucket, the rear wheels are a bit light. Especially noticable going down steep hills.

 

[kennyd]

Your manual should list required weights for ballasting.

 

[Usta]

I found nothing in the tractor manual on ballast box weight but after your post I thought of looking in the loader manual.
There it was, ballast box approx. 420 pounds. I am assuming this is in addition to my calcium loaded tires.

Wonder why the tractor manual states
max. box blade weight of 375 pounds
max. rotary tiller weight 375 pounds
max. disc harrow weight 300 pounds