b-rad said:
I'm new to this forum and exctied to find it. I am in the process of purchasing a cucv ambulance. I had a few questions I hoped could be answered.
Right now the thing dosn't hold a charge. Is the easiest fix to just take out the 24v system and repalce it with a 12V?
I plan to convert it to a camper, are they reliable on long trips, say cross country?
It only has 13000 original miles and the body is imaculate. Other than the charging problem it runs great. It sounds like a good buy to me.
I would say you should first figure out if the problem is that the alternators are not charging, or if it is the "classic" M1010 charging system issue. To be sure, you will need a pair of good, fully charged batteries and a voltmeter. Basically, to fix the problem, switch the orange and red wires on the DUVAC box on the inside of the left front fender. This will run the top alternator in 12V mode all of the time, so you will no longer get 200 amps of 24V power. You will still have 100 amps of 24V from the lower alternator and about 70 amps of 12V power from the top alternator. Additionally, never, never leave the master power switch on for several days without running the truck. I was not able to pinpoint the drain before I sold my truck, but there is a 12V drain somewhere, and it will kill the front battery. If you drain the front, charge it up fully before starting the truck. Otherwise, the rear battery will overcharge the entire time that the front battery is getting fully charged by the truck's top alternator.
Here's the boring details of the charging system problem for those who care:
http://www.toadmail.com/~cucvfan/200AmpCharge.html
I would not be too concerned with the reliability of these trucks on a long trip, because if they are maintained well, they last a long time and have no different problems than their civilian equivalent. However, 4.56 gears and the lack of over-drive will certainly make you think twice about driving accross the country, unless you have plenty of time (and hearing protection) or, if you like running your engines flat-out on the governor all the time.
Although you did not mention price, it sounds like a decent truck. Go for it!