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I've been meaning to do this for a while for the 250 folks, and finally had a chance to. The genset at my work is 855 powered, and the engine tag rates it at 535hp. Here are a couple shots of it. Just seems like normal old school Big Cam stuff. PT pump and aftercooler. She sings. No...

Clutch housing showed up today. Cast iron piece, new and direct from Eaton, only $200 and free shipping. This is required to mount a Roadranger trans to an SAE #2 engine flywheel housing. I could have switched the engine flywheel housing to SAE #1, but I would have needed new rear mounts...

I'm leaving the window out through the swap just to drive you nuts.

I know, wishful thinking. I need 12 total. If I can do at least 6, then that will cover the basic truck needs. Then beg Simp to drag 6 to Findlay.

My personal opinion, I don't know why people charge. It mostly stems from one wanting to keep the original mil batteries for whatever reason. If they are 5 years old or more, they are shot anyway, even if they are able to start the truck. Go with 4 new semi-truck group 31's, make sure your...

A 12v battery reads 12.8v when fully charged. Any voltage over that is charging. Just double for a 24v system. Fully charged 24v system should be 25.6v with the engine not running. Takes more than 25.6v to push charge into the batteries. The higher the charge voltage, the more forceful it...

If you cut the rated duty cycle of a 12v winch down to 1/4 of its rating when using it on 24v, it will be fine. Ohm's law, V = I x R. R is fixed, and we are doubling V (voltage), so I (current) also doubles. W (watts) = I x V, so if it was initially a 3000W electric motor, it is now pulling...

Lowest confusion method is to just charge each battery by itself with an automatic 12v charger. Don't have to disco (disconnect) anything. Two will show a long charge time, and two will show short charge times. When charger is done, move to next battery. Nonetheless, this is the easiest...

Was informed ISL engine was removed from the RV today, awaiting pics. I fetch it this Friday. Bought 4 new trailer tires at lunch today to head down and get it with on my open deck car trailer, old tires had heavy side wall cracks from sun and oxygen rot. Ordered the above mentioned...

Good idea. Ants in my pants, could not wait. Ordered flywheel, hydraulic slave cylinder, newer shift knob and 13sp bezel for it, 13sp shift pattern dash card, updated range selector valve, gasket set, etc. Trying to hold out for the clutch until I actually get the engine, but may not be able...

12v HF off the first battery is lowest cost way. Running a 12v on 24v will only work for a short while till cooked. Why don't you guys pick up a used MileMarker 10k 2 speed hydraulic winch that some of these had on them? I bought one and it is strong as an OK. Runs off the power steering...

Once done, I'll condense key points down into a short recipe and post that as its own thread with needed items and lessons learned. No further updates until Friday afternoon when I pick up the ISL RV engine, that will be on the Power Surge thread. After that test runs on the ground OK, then...

Thanks Jason. I'm not sure it will work. It "should", and I am going to proceed until I hit a wall with it. More than a few have wanted their M939's to be manual trans, so I hope in the end, I can simply list the necessary items or part numbers used to do so, so others don't have to spend so...

If this works, I may be. Here's a teaser: https://m.youtube.com/watch?v=LpoS7cI4c64

The suction side of the M939 fuel delivery systems are one of the weakest areas of these trucks. Filter change as mentioned, and also dump out the old ones to look for water in them. If water, drain some of the tank to get it out. Make sure soft hoses on the suction side from tank to lift...

Good point to consider, I'll raise it 2" when I roll 16's.

Only open issue now seems to be that when using a hydraulic release, you are "supposed" to use a self-adjusting clutch. It does not appear mandatory though. It seems that if you stay up on clutch adjustments, it could be OK. Eaton does not say you "MUST" use a self-adjusting clutch, they just...

If I want the 14" 1400ft-lb rated unit (double disc?), then it seems I need a cup/pot type of flywheel. Cummins p/n for this is 3910542. Hydraulic slave is mostly pull-type release bearing only, so clutch needs to be pull type also, which the majority of the big league stuff seems to be...

Ugh! So there are 14" flat flywheels, 14" cup (pot) flywheels, and 15.5" flat flywheels of several inner bore diameters, I think. 14" and 15.5" being the clutch friction disc diameter. 14" is SAE #2 and 15.5" is SAE #1. On the 14" clutches, the clutch is designed for either a cup (pot) type...

More clutch confusion. There are flat plate and cup type flywheels. Each takes a specific clutch. Great. I definitely have more homework here to figure this out. My choices open up if I am able to use a 15.5" flywheel inside an SAE #2 clutch housing, which is not the norm from what I little...