D6c oil cooler

Hi all

I am trying to find a oil cooler for a d6c 74a. My supplier told me that my 5S3413 changes up to a 2W 9978

It doesn't the flanges for the oil lines are different and it has a different bolt pattern and spacing.

have you tried a google search.

I have Googled and called. The part number updates to 7n0098 has 2 bolt flanges. .The images of that part number match mine. Trouble is the 7n0098 up dates to 2w9978 This one has 4 bolt flanges and the bolt spacing will not work with my oil lines.

I'm tempted to screw bolts into the oil cooler and re drill to the correct spacing. I am just concerned about the drill bit walking of center due to the different metals, cast iron and steel.

If you have enough room ( clearances) can you make an adapter (flange) to allow you to use existing holes in the components? Sometimes the simple "farmer's" fixes allow dis-similar units to be fitted without loss of function. -- cts

I don't think a adapter is a good idea as the other end of what bolts to the cooler is a pipe with a oring that press into a fitting.

Everything has to be reasonably close.

got some pictures. a pic says a thousand words

Have you tried a radiator shop?

Our local one will retube oil coolers.

Bob

are the fittings sae code 61.https://www.tompkinsind.ca/wp-content/uploads/2024/02/tompkins-technical-section-code-61-62-flanges.pdf

the older code 61 have 2 bolt clamps the modern day cat flanges are heavier. and require a spacer ring if using aftermarket hose ends with genuine clamps

Photos illustrate better than descriptions in many cases. Often with replacement parts, one has to make adjustments to fit the unit. If necessary, one can lengthen pipes, hoses, change mountings, etc. This is part of the trials and tribulations associated with working on equipment, modern or antique. Adapt and accept the challenges, fortunately, there are many sources and tools available today that were not in past times. -- cts