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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.
Pacbrake part #C40127 MAX-FLOW 4". This bolts directly to the HX-35 after you remove the 3" stock outlet plate. She'll breath easier now with lower EGT's and improved power and fuel economy.
New Pacbrake installed. This little beauty killed 2-birds with one stone for me. Upgraded my turbo exhaust outlet to 4" and provided me with the best exhaust brake available (IMHO) which, if all goes according to plan, should reduce service brake use by about 80%.
Hot pressure wash/degrease and a couple of coats of engine paint and she's ready to go back in final.
Have to take a moment to praise my idea to use my 3-ton floor jack as my heavy-lift buddy on this work. The interchangeable lift-foot is mounted on a 2" dia. post that sticks up a few inches. I took a 2" forstner bit and bored it about 3" deep into this 6 by 6 block. Had one ready with a 2' by 2' pc of plywood screwed onto it also. Turned out to be real handy.
Fan belt: Gates K080680HD
This shows the re-routing of the belt from the standard Ram Cummins setup. NOTE: This is with NO - AC on the engine! Again: Thus far it seems to work with the couple of very short engine runs I've done. I still need to verify function with extended runtime.
Spacer & fan installed. Mind the torque specs on the fan bolts.
Fan pulley part #3943591. This unit is about 1" larger diameter than the stock one it replaced. It is the correct pilot and bolt circle size for the ACS fan. Installing this larger dia. fan will cause the fan belt to run against the upper water hose neck. My solution (as yet untested with significant run-time) was to route the fan belt on the outside of the tensioner. See pics following.
Fan spacer part #3910128 (Mottrol). You'll need one of these to mount the ACS fan, otherwise it don't have enough clearance behind it. The prices on line vary wildly on these so watch out. I got mine for around $30.00.
One of these babies will raise the fan hub about 4" on the front of the engine and bring it over the centerline of the crank. (Cummins Fan Support 6bt- 3913433/5263160). It will necessitate a slightly different routing of the fan belt, adding a new fan/pulley mount for the ACS fan and a 1" spacer to kick the new fan out yet another inch so it clears the front of the engine. See following pics.
Raising the fan on a 6-BT will require replacing the stock Ram truck fan-support with yet another option available for the Cummins. These engines were used for so many applications that this would not prove much trouble to deal with. This stock unit is about 2" off center to the right of the crank centerline and quite low on the front of the engine.
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