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safari1234's avatar
safari1234
Explorer
Apr 06, 2014

Starting problems 1992 Safari Ivory Diesel

Hello,
I have owned this coach for approx. 2 years. When I acquired it it had no batteries at all in it, the owner had removed them the spring before the he passed away. I had no idea of what type 12v 6v 24v anyways a friend worked on it for about a day and best guess figured out which cable was pos and neg. for the starting batteries as they are both black and about 5/8ths of an inch in diameter. we later found a general owners manual in one of the cupboards which told us it was a 12 volt system. Two deepcycle 650 cca for the house batteries and two 12v 1000 cca for the chassis in parallel. The coach started fine for about a month but never seemed to turn over easily it really is not used very much, I just try to start it every month or so but the last while even though the batteries are full it won't turn over fast enough, negative cable gets extremely hot actually melted the lead a bit. When I use the battery boost it makes no difference. Not sure if it is the starter or what I really would like to be able to start this thing. So I can start to use it.

Thanks for any help,

Steve
  • Common electric starting systems for diesel engines;
    12volt - one or more 12v batteries wired in parallel,
    24volt - two 12v batteries wired in series,
    Series-parallel - two 12v batteries are connected in parallel to give 12v for normal running. The batteries are switched to series for 24v starting. The batteries are switched back to parallel once the engine starts.

    I believe that 12v is the standard for on highway in North America. 24v is very common in other parts of the world. Series-parallel doesn't seem to be used much any more.

    Some installations may have two 6v batteries instead of a 12v battery.
  • Sorry, this is mis-information.

    Yes, most DP's have two starting batteries, but they are two 12 VDC batteries WIRED IN PARALLEL (still 12 VDC, but more amps).

    Yes, there are some OTR buses that are 24 VDC.
  • It takes 18 volts to start an auto diesel engine. Ford and Chevys run 2 12 volt bats, Dodge runs 1 24 volt bat.
  • wolfe10 wrote:
    I am not aware of any Safari coach with a 24 VDC system.

    But, very easy to determine-- voltage should be easy to read on the alternator.


    Wrong!

    It will charge and have a 12 volt operating system. If it is indeed a 24 volt starting system, there will be a series/parallel switch in there somewhere. You can start a 24 volt starter on 12 volt, but it will not turn over as fast as it should. The brand of the coach has nothing to do with the chassis, the chassis comes to the coach builder already assembled for them to build on. Different chassis manufacturers will have different engine/transmission/suspension/axles/etc.. depending on what is speced and available.
  • I am not aware of any Safari coach with a 24 VDC system.

    But, very easy to determine-- voltage should be easy to read on the alternator.
  • May have a 24 volt starting system. Without any real information, couldn't be sure. Large diesel engines require a tremendous amount of power to turn over. Your batteries may be too small of not enough of them. Best thing to do, is to take it to a large truck facility or find a mobile mechanic that works on large truck. They will be familiar with the engine and chassis set up and will be able to get any needed information.
  • Correct. Heat= resistance. Clean if a terminal, replace if a wire or at least remove the section that is hot.
  • Sounds like it could be a faulty earth. High resistance generally displays itself as high heat.
    Check all of your connections in both positive and negative leads, and check the motor earth to the chassis.
    Could be it.