D2 5j, 1941,, oil cooler lines,

Yes I am sure any hydraulic hose supply house could make something up for you fairly inexpensive and quickly just bring the old ends with you to make sure the new hose will be the same style fittings. You may need to adapt some fittings to make them hook up but those places usually have just about every fitting combo you can think up.

I'm trying to understand what you are after. From what I've seen, the majority of oil cooler lines have been looped because of leaking coolers. If you want to keep it original, then you could make lines that look N.O.S. or buy some used ones. If you don't care about keeping your machine original then you could keep the line looped. As I understand it, Caterpillar studied the oil temp situation & decided that a cooler was not needed. That is why they were eliminated sometimes in the 50's. At least on the NA engines, I think.

I read the first 2 words "I Had".
Anyways, did you get them bent exact to what?
Yours were cut and looped which means you don't have all the weird bends that CAT put in them to make then lay down on the side of the engine to clear whatever accessory that maybe added to that side.
Easier than explaining it is if you have the correct bends at the correct lengths is to look in them in the service and parts manuals to see exactly how the one lays with the other intertwining it.
I think that is where I first figured them out as I looked at 4 J's which all had them removed because as stated previously, it is found to not be necessary.
Also if they were rotted from dirt and moisture, I would not be surprised if you find the manifold and cooler lines inside the radiator that connect to the cooler is rotted out also.
If not an issue there, then the cooler will probably be leaking at the lower fin tubes due to moisture and trash.
Plus
If you are insistent on hooking it up, then yes single braid steel hydraulic hose is fine to use as a substitute.

Basically what I started off with was the 2 lines were cut in half,the 2 halves that were connected to the cooler were removed,then there was a hose clamped onto the 2 halves coming out of the oil filter housing,all of this was done by the previous owner, then my father decided to take off the the 2 lines coming out of the filter housing then handed them to me to get them made, so I had to figure out how the 4 pieces went together , they were made to what I came up with but I mainly need a pic of the lines when they are on the motor to see how I have to have these things lay , cuz I can't figure it out

Hi Team,
from my early 5J Parts Book.
Cheers,
Eddie B.

Hi Team,
from my early 5J Parts Book.
Cheers,
Eddie B.

Thank you for the photo , I didn't realize they crossed,will try tomorrow to put them on

See attached photo. It how mine came off and how they went back on.
Sjs

Forget the lines,,,,that's a sweet looking motor!!!!!