am having problems finding the right shop manual for my 70s International 2500 A backhoe. I have hydraulic problems that changing filters 2 times dd not help much if at all... looking at online parts catalog does not have everything...first of all... is the 2500A underneath basically a 574 tractor or other? so it came with a 3050 loader and a 3141 backhoe. has mcv pump side mounted of left side and believe a Thompson side mounted pump on right side of tractor. has 2nd hyd oil flter on right side under foot plate. looks like m going to need a manual for the complete hydraulics but cant seem to find what i need ...any one know where can get that info...there is alot of hyd valves and diverters, ect.. that can go bad...need a manual that gives me all that , and inside the rear end and both pumps...Tried Jensales but Im not sure they have the hyd secton I need in the chassis manual..thanks