Jump starting a 24 volt MCI 9

johns4104s · August 30, 2009, 09:14:54 PM

How do you go about jump starting a 24 volt MCI 9?
Also are there very many other coaches with a 24 volt system? Does Prevost or Van Hool have 12 or 24volt systems?

Thanks

John

luvrbus · August 30, 2009, 09:26:50 PM

John
both have 24 volt for the main system.

good luck

johns4104s · August 30, 2009, 09:29:31 PM

Luvrbus,

What does your Eagle use?

John

luvrbus · August 30, 2009, 09:35:42 PM

12 volt, John how many batteries do have if just 2 find the low one and jump it with 12 volt just don't try and jump 2 together

good luck

Jeremy · August 31, 2009, 01:21:20 AM

Quote from: luvrbus on August 30, 2009, 09:35:42 PM
just don't try and jump 2 together

Why not?

As it happens my bus has four 6v batteries so I couldn't just jump one anyway, but I cannot think of any reason why you shouldn't jump the whole lot using two batteries

Jeremy

NewbeeMC9 · August 31, 2009, 03:43:24 AM

I jump mine from the house batteries, Just turn the switch to the BOTH position.

John316 · August 31, 2009, 05:13:01 AM

Ours is 24 volt. If I needed to jumpstart ours, I would disconnect the batteries, and charge them at 12V. After they were done, I would hook them back up.

God bless,

John

luvrbus · August 31, 2009, 05:58:17 AM

guys I was telling him how to jump his 24 v with a 12v if you connect to one battery you are ok but if connect with all the batteries at the 24v end not ok 12v and 24 v don't mix but one 12v at a time in the group is ok and most of the time jumping one will start the bus.

good luck

buswarrior · August 31, 2009, 06:19:24 AM

two inexpensive battery chargers are a valuable addition to the busnut arsenal.

attach each one to a battery in the traditional manner, simply focus on one battery at a time,

one extension cord will run them both.

start bus in a few hours, or in the morning.

No need to disconnect anything with tools, just pull the battery switch in order to maximize your efforts.

happy coaching!
buswarrior

John316 · August 31, 2009, 06:56:12 AM

I see, Clifford. Makes sense.

God bless,

John

TomC · August 31, 2009, 08:41:45 AM

You need two jumper cables and two separate batteries. Then hook up to the bus batteries separately, like they are wired, and you have 24v available for jumping. Even on my 12v truck, it has 24v series/parallel switch that you also need to hook up two sets of batteries with two jumper cables to get the 24v. My '79 Olds Diesel was wonderful for this since it has two starting batteries. Good Luck, TomC

Jerry32 · August 31, 2009, 08:45:01 AM

I found a 24 charger with a built in timer that works for me quite well. I can charge house and coach batteries at the same time or just the house batteries alone. I can also use the inverter charger the same way. I would just aaaaaaaaaaaaaaaaaaaaaaaaamake up a 24 battery and use a set of jumpers to connect. Jerry

johns4104s · August 31, 2009, 06:59:42 PM

So you would take the two batteries out of the circuit and jump two in making sure to include the pos to neg jumper, Correct? So its not possible to add anything to the original low batteries, Right?

Thanks

John

Don4107 · August 31, 2009, 08:59:39 PM

If you have two donor rigs and two good sets of jumper cables you can hook one to each battery. Make no connection between rigs and be sure the bodies are not touching. As with any jump, let the donor rigs charge for a while at fast idle.