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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 First210 Photos - Page : [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18]

Air spring trailing arm mounts completed. As I cobbled these together from some gifted steel, they're rather patchworked together. They're about 36" long and the 6" round lower disc is tilted about 10 degrees upwards off the plane of the beam. If they prove not able to do the job, I'll simply make new ones out of heavier box channel steel.

Included this pic to illustrate the close proximity of the bottom shock-mount to the edge of the air-spring mount beam. Got to thinking it might be a good idea to fab a simple bracket to provide an additional support-connection between the trailing arm and the air-bag arm while still providing the shock mount in the same position. Plan to look closer at this.

Now... to make it all out of steel!

Good 4" or so clearance from bag to tire.

Some simple brake-line re-routing will be in order here to keep stuff away from chaffing the bag.

Again, good access for another weld along the entire bottom edge.

This pic shows that with the 3 1/2" x 5" angle mount bracket in play, there actually may be enough room to get at it with a mig to weld it to the trailing arm.

Here ya' go Lenny! I actually took your advise and did a mock-up out of some crap plywood I had kicking around. Used a laser under the coach to spec out the sketch to make sure all clearances were considered and accounted for. The primary material will be 3 1/2" X 5" X 5/16" angle iron. Most of the 3-ft. main-beam section and the 12" long mount section that will be welded to the trailing arm will be made from this; additionally, this mount will be bored for three 1/2" bolts so the main beam can be bolted to it and easily removed if required. So far it's looking good but I've yet to confirm the correct angle to mount/weld the mounting plate at.

I'm running with these Goodyear #2B9-252 airsprings. They're used on heavy trucks and trailers and the specs tell me they are a tad on the large side for this application; but, I scored them for a song so - they are going to fit!

Air-spring trailing arm mount sketch. 3-pcs: 12" x 3 1/2" x 5" angle iron mount, welded to forward flat section perpendicular to torsion bar; 3-ft section main beam; upper bag mount welded to coach chassis. Dimensions to be verified.

When I saw Rico's pic of how he blocked up his coach, I liked it right away. Much safer than the way I had it before. The wheels are sitting over a foot off the ground now.

Mondo Inverter 2,000,000/watts!
Show Newest Photos First | Show Oldest Photos First210 Photos - Page : [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18]

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