detail hereinafter the central equipment mounting assembly 14 best seen in fig1 and 6 of the drawings has a pair of vertically spaced transverse frame members 17 and 18 with reinforcing plates 19 and 20 extending therebetween in abutting relationship to said respective vertical bucket arm sections 15 a and 15 b openings are provided for hydraulic fluid lines l which extend along the respective outside surfaces s of the arm supports 12 and 13 to the aforedescribed piston and cylinder assemblies 16 a and 16 b thereon it will be noted that each of the extending arm portions 12 a and 13 b have an area of reduced cross sectional dimension at 19 a to provide mounting space for the piston and cylinder assemblies 16 a and 16 b which are pivotally secured to the respective arm portions 12 a and 13 a at the reduced transition vertical dimension point tp referring now to fig1 2 and 4 of the drawings a material load bucket 20 can be seen pivotally attached to the hereinbefore described arm portions 12 a and 12 b of the main support frame 11 the bucket 20 has oppositely disposed spaced parallel sidewalls 21 and 22 interconnected with a back wall 23 and reinforcing top plate 24 thereacross each of the sidewalls 21 and 22 has an elongated frame receiving pocket channel 25 extending from a base bucket bottom plate 26 interconnecting the respective sidewalls 21 and 22 and back wall 23.