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Cat specced a pair of group 31 batteries for the equipment that uses these engines. Thats about 100AH of battery and is usually paired with a 50-75A@24v alt. There are literally millions of vehicles motoring down the highway with a similar configuration… A 75A@24(~28v) alt Is good for...

Ok, I was getting confused with all the thread drift:) wanted to confirm I was sending you the right starter circuit info. It is a bit different for the A1R…

And that was on an A0/3116 right?

Ok, so what problem are you still having and on what truck are you having it?

The problem is, you don’t really have a 100A alternator. It is more like a 60/40A alternator. The inlet air heater is automatically controlled by the ECU,

Ok, thats not too bad, 160-170AH maybe in a series parallel config. Thats way easier on the alt than jthe original 240AH bank… But they will still pull a bit of current when they are thirsty, 50A maybe…

Orange lights indicate low voltage, the heater and batts were probably overloading it. What are you running for batts?

The alternator doesn't come online until after you get 15PSI of oil pressure(idiot light goes out), which it most likely does after you are done cranking. this is the same circuit that disables the start circuit to keep you from engaging the starter/cranking a running engine it was probably...

Well there are I believe 12v and 24v versions of these starters, the solenoid might not have been the 24v version… Jumping across the large terminals of the aux start relay on the drivers frame should bypass everything above. If that didn't crank, and you still see 24v on the starter + and -...

My low pinion DS is currently setting at 61” or 155.25CM, but I have no weight on a bare chassis right now so my suspension is extended a bit:) high pinion being 1/3 the angle(~3 deg?) and a few inches shorter(less mass) would definitely reduce the longitudinal forces. Under 5.5 degrees would...

you want the input and output pinions very close to/at the same angle, so the only reason you would use shims is to put the two pinions at the same angle. The only way to reduce driveshaft angle is to raise or lower something… you could put a high pinion axle in the rear end(raises the rear...

I am not sure what the rear shaft angle is on the trucks with a raised pinion, but Yes, steeper angle of the lower pinion axles, coupled with the ~3350 driveshaft RPM at 60MPH. At ~9 degrees on the older 4x4 trucks, highway RPM is double what the engineers say a driveshaft should be spun at...

As you increase the driveshaft angle you increase the longitudinal vibration. This has nothing to do with the balance of the driveshaft, and a perfectly balanced driveshaft will experience it. It is a physical phenomenon brought on by changing the plane of a driveshaft operation(angle) using...

That and operating them well outside the max RPM vs operating angle spec...