cat 830mb scrapper tractor

hey guys, weve came across one of these big boys at a military auction, didn't come with blade nor bowl, just plain tractor. well we have a big pull behind forestry chopper. gonna pull it around with the 830,,, but we cant seem to figure out the hyd lines behind the cab, in the cab theres the 3 controls that worked the pull behind pan. theres 2 big lines,2 medium size lines an 2 small lines. though it was all self explained here (keep all of ech size together) but it didn't work that way... seems like everythings working against each other, removed control valve cover at joysticks an found that theres not 2 lines at every control valve (ya know one line over the other getting oil from spool) it seems all 3 joysticks are in line an all go into one big valve block, an theres 2 big lines comeing outta the top half of the valve were each joystick is an at the bottom middle area theres one of the middle size lines an the 2 small lines are plumbed outta the bottom front of the valve were the bowl lift an drop function is, it seems if ya pair all the same size lines up with each other they all kinda dead head. if I tie one of the big lines an one of the medium size lines together I can get a cylinder to move in an out all the way. we ve moved lines allday trying to figure this set up out. theres really no infor out there that we ve found yet nor any other 830 s around to compare tractors

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cat 830mb scrapper tractor