International 3514 w/ 2500 Constructall w/ Exteneded Boom

i just got a very nice working International 3514 with a 2500 Constructall Extend Arm Back hoe. The Person i got it from told me that when he got it the hoses for the back hoe with off, he sorta put it back together and couldn't get the backhoe to work at all. i purchased 4 manuals for my Tractor and Backhoe but neither one of the manuals showed my backhoe, the backhoe attachment has and extra valve for the extended boom arm. i got the other controls to work but for some odd reason i can net get them to work properly unless i engage valve number 7, with the 7th valve is engaged i can work the swing, bucket and the other controls except the Extended boom arm, according to the manuals the 7th valve is for the lift, so i switched the Lift for the Extended arm so i can use the Backhoe. my question is, is there anyone out there who has the 2500 constructall backhoe with the extended arm that has gotten it to work. if you have a photo to show me which valves go where, i mite be able to get it working, and yes i do have the divert-er engaged to work the backhoe but it works better if i engage the 7th valve. all the manuals I've gotten and looked through do not show me any 7 valve system, all they show me is a 6 valve system, any idea what he did to screw it up on me. again got backhoe to work as long as i engage the 7th valve.

I would start by checking the pressure at each port of each section with a proper guage and snubber to make sure the pressure relief settings are correct. The valve bank may have been off for repacking and all of the reliefs backed off except section seven which could be acting as a remote relief to create enough backpressure to make the other circuits work. Each section will have a different pressure depending upon its function. Lift, crowd, curl, swing, etc. I would start with a 3000 psi guage.

I've seen similar problems on many of the older IH hoes - with and without the extendable boom.
IH backhoes with the dual hydraulic systems are different from any other backhoe I've ever worked on.

I've got a 3414 right now, with a 3120 backhoe. When it gets hot, the boom won't raise unless I pull steady on the swing lever. They are supposed to be two totally separate systems each with their own pumps - yet holding onto the swing forces the boom to work.

I suspect your problem is not because of hoses hooked wrong (but they may be also). I suspect that one of your pumps is bad, and/or you've got a bad check-valve somewhere. 3514 tractor uses one pump just for the power steering AND swing/stabilizers on the hoe. The other pump runs the front loader and all other functions on the backhoe. If one pump is bad, or, a check-valve goes bad letting oil from the swing-stabilizer circuit leak into the boom-curl-bucket circuit, you get some very strange problems like you've described.