Box boom loader mechanism

A box boom loader mechanism for use on a construction machine having a frame with a pair of outer side wall portions, a central portion with a pair of inner side wall portions disposed between the outer side wall portions and spaced a predetermined distance therefrom, comprising:

• a box boom lift arm assembly having a pair of inner side walls extending a predetermined length, top and bottom walls extending a predetermined length substantially equal to the predetermined length of the pair of inner side walls and fixedly connected therewith to define a first end portion and a pair of outer side walls connected at a predetermined location along the predetermined length of the pair of inner side walls and extending outwardly therefrom a predetermined length with each outer side wall being fixedly connected to the top and bottom walls to define a bifurcated second end portion opposite the first end portion, the bifurcated second end portion sized to straddle the central portion of the frame and terminating at a frame pin joint pivotally connectable with the frame;
• a tilt linkage means pivotally connected to the box boom lift arm assembly;
• a lower pin boss fixedly connected to the box boom lift arm assembly at the first end portion and an upper pin boss fixedly connected to the tilt linkage means;
• a first hydraulic cylinder pivotally connectable to the frame at a first end and pivotally connected to the tilt linkage means at a second end;
• and
• a second hydraulic cylinder pivotally connectable to the frame at a first end and pivotally connected at a second end to the box boom lift arm assembly at a first pin joint adjacent the bottom wall.