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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.

Show Newest Photos First | Show Oldest Photos First234 Photos - Page : [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]

Make 2 new end brackets from chunks of 3 1/2 x 5" x 5/16" angle iron I had on hand. This is a little heavier than what I cut off but it has more work to do so all good. The distance from center to center of the mount holes (7/16") for the 3/8" gr. 8 cap screws is 28 3/4". To provide some horizontal movement for alignment purposes, I chose to make the 7/16" holes into 1" elongated slots with a 28-3/4" end to end center. BTW: vertical adjustability (if needed) will be done by adding washers as shims between the two rubber shock washers and the trans tail-housing. Note: with vertical adjustment in mind, it is imperative not to suspend/mount the trans too high from the outset, otherwise you'd have to put a shim between the chassis mount brackets and the new trans ears you just welded on. Does this make any sense?

Before I cut the two ends off the trans cross member (tcm) I marked R & L on them so they could be repositioned as templates to mark the original bolt-hole centers on the new angle pcs. BTW: I also measured the center to center/end to end @ 28 3/4" before I cut anything. As well, I measured the hole to hole centers across the flange from the front of coach leading edge towards the rear.

The center line is the 28-3/4" mark for the center of the 1" slot. IIRC, the lines above & below are just over 1/4" (+ 1/16")off the centerline. There I punched the four countersinks for the drill. My old drillpress ain't so hot so I started with a 1/4" hole then finished with the 7/16".

Had to figure a way to turn these holes into slots without bending-over for a machine shop.

This proved the answer.

If there's a will there's a way. These blades went through that 5/16" plate like nothin'. Flat bastard did the rest.

Ready to 'clamp-in-place' on the coach then tack-weld them exactly where they will live forevermore.

First, the TCM brackets get bolted in place. Starboard side here.

Port side here.

Before proceeding, double-check alignment. The big wood block the end of the trans is resting on is sitting on my motorcyle lift for vertical adjustment; meanwhile, the little ratchet strap in the upper right corner is wrapped around the tailshaft housing and served adequate for horizontal adjustment.

409-lbs as it hangs!
Show Newest Photos First | Show Oldest Photos First234 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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