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|#846 - Cummins Swap|
|Author: andy1canada (Show all albums)|
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.
After much deliberation I decided to follow Lenny's lead and delegate space beneath the genset as the 'Cooler-corner'. The only change I'll make is to place the fan on top, pushing air downwards so as not to suck road-dust etc up into the engine house. Here you can see this cooler is going to take every inch of space to make it fit. Yes, tongue-in-cheek going forward.
On to the intercooler. I really went out on a limb with my choice to go with a Dodge 6.7 intercooler. It may or may not fit but will be close.
With test fit underway this where I discover my EMCM clearance was insufficient. I'll need to raise the engine about an inch as the power steering pump is almost resting on the mount. I failed to take into account the amount the engine would 'sag' downwards onto the rubber mount bushings. Nearly 1/2" it appears.
Back to updating the swap pics after my diff-diversion. Here the trans x-member and engine mount cross member (EMCM) are ready to go in ahead of the test-fit of the engine and trans. Again, I'm thinking I may beef-up the EMCM later.
Some good promotional info here from the original seller's of these diff's, the late great, Leslie Hoagland, of the former MCR RV service/repair/sales business in Illinois.
SORRY THESE ARE SUCH LARGE FILES AND HARD TO SEE ON HERE. DISINCLINED TO RE-DO ALL THIS SHIT OVER AGAIN. EASY TO 'SAVE AS' THEN OPEN WITH YOUR OWN VIEWER AND ZOOM-IN AND OUT AS YOU PLEASE. THIS SKETCH SHOWS AN APPROXIMATION OF THE 5-DEG PINION ANGLE ON THESE DIFF'S.
FIRST OF TWO SKETCHES OF THE RS-15120. I'VE CONFIRMED THE TWO PROP SHAFTS AND THE PINION SHAFT ARE THE SAME AS WHAT'S ON THE FMC'S F140 DIFFERENTIAL. IT SHOULD BOLT ON TO AN FMC, JUST LIKE CHRIS HOAGLAND STIPULATED. EACH OF THE 3 STUB SHAFTS TAKES A 1.25"-18 FLANGE NUT, PART #1227Z936
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