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#846 - Cummins Swap
Author: andy1canada (Show all albums)

Howdy Folks!

Going to give this another try as my first attempt didn't go so well on the 'Diner-conversion' thread (Will update/edit that soon).

Started my Cummins swap by pulling off the bumper; only took better part of an hour. That sucker is HEAVY! Better part of a 100 lbs I bet. Will be looking to knock substantial weight off that baby while still retaining a 5000 lb towing standard.

This will take a while as it will unfold as time and resources permit, so please be patient.

More pics and hopefully some videos (FMC-TV) to follow.

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Included this to show the repositioning of the lower heavy angle bracket. You can see the four holes just above it where it was originally. Ground off the inside heads of the four heavy iron rivets that held it then pried it off from the outside with a cold chisel & hammer. Also, the big bracket above it with the round hole is not needed and could have been taken off. You can just see the 1/2" bolt above it sticking out at the top of the rad and this is where I decided to attach the angle support struts from the original set up.

Done. The fan will sit almost exactly 1/2 the blade depth into the shroud. Note: the SS sheet metal is over 3/4" above the rad core face, so there's room for the fan air-flow to reach most all of it.

Tin snips on some aluminum flashing then a few more rivets and boom...

On to the shroud. Found this chunk of 16ga. SS sheet metal I had kicking around that was tailor made for this job. Stuff was pretty hard though. Went through about 5 jigsaw blades to cut this 80" circumference. Added 1 1/2" to the fan circumference for 3/4" blade to shroud clearance. Found some 1" angle brackets I had on hand and had-at-it with some 3/16" rivets. Yee-ha!


Seriously, who could not re-use a thing-of-beauty such as this 1/2" lock-nut? Can't buy stuff like this any more.

Adhering to my mantra of 'keeping it as stock as possible' throughout this swap, I decided to re-use the OEM rad struts. Here's the parts ready for reassembly.

Here you can see one of the two heavy side mount brackets I decided to use to carry the primary weight of the rad on each side. This one needed to be lowered about 5" or so then welded back on at the same height as the support just beneath it.

This proved a good way to assure the rad was held parallel to the fan without damaging the rad fins.

Plumb and square to the prop with standoff shimmed with 1" styrofoam pads.

Rad jacked into place then rear apron installed to confirm clearance and fit.

On to rad install. Note: here's the two side frames you'll need to source to use this Spectra aluminum rad, should you choose to do so. They are designed specifically for this specific model/size of rad (in both aluminum & plastic tank versions) used on a wide variety of Freightliners and other med/heavy duty OTR trucks. With this frame set up the rad install became much easier. It is designed to allow the aluminum radiator to expand/contract inside the two metal side frames, greatly extending durability and service life (I hope). The Spectra tech (Canada) advised that these frames can be hard-mounted directly to the frame of the vehicle as they provide ample shock and expansion accommodations. However, the frames did require minor modifications to work in this application.
Show Newest Photos First | Show Oldest Photos First237 Photos - Page : [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]

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