Jump Starting Question - Steel Soldiers::Military Vehicles Supersite

motorolanut · 01-25-2008, 03:07

My 813 has low batteries and don't wanna hold a charge. So prior to installing new ones.. Is it possible to use one of those portable battery jump starters to Help jump start a M800 series? and If so how do you hook it up? Or will the 12 vs 24 not work?

cranetruck · 01-25-2008, 03:15

Relace the bad batteries.
Don't jump a 24 volt system with 12 volts, the minimum needed on your starting motor is 20 volts or you'll burn up the motor....

motorolanut · 01-25-2008, 03:30

Okie Dokie...THX....

Mike_Pop · 01-25-2008, 09:24

I've tried jump starting with a 12v system and sometimes it works but most of the time it doesn't. I've had better luck using another 24v vehicle and jumping from both batteries. I really need to get a slave cable adapter!

mangus580 · 01-25-2008, 09:26

The only time 12v jumping works... is on CUCV's really. Most the time with them, when your batts go dead, its the front batt only (leaving lights on or something stupid like that).

Now... if you had 2 jumper packs.... or a jumper pack, and a 12v vehicle... you could do it!

Mike_Pop · 01-25-2008, 09:29

Quote:

The only time 12v jumping works... is on CUCV's really. Most the time with them, when your batts go dead, its the front batt only (leaving lights on or something stupid like that). Now... if you had 2 jumper packs.... or a jumper pack, and a 12v vehicle... you could do it!

I've tried it with a vehicle and a jumper pack. If the batteries are really dead, it won't work. But you are correct, putting juice to the front battery does help and can get you started.

ida34 · 01-25-2008, 09:30

You have to have two of the jump starters. One for one battery and one for the other. I have done it before. I have seen some 24 volt jumpers but two 12 volt models hooked up right will have twice the capacity of the one 24 volt jumper. I assume you know how the batteries are set up. Two each batteries in series with the two sets connected in parallel. If you do not understand what I am saying then don't attempt it.

Mackfire68 · 01-25-2008, 09:33

If this is the dual battery settup, disconect the cable between the two batteries and charge them up individually with a 12 volt charger. Its hard to start a 24 volt system with 12 volts. This is what I do when my batteries get low until I buy a 24 volt charger. Check your batteries to make sur they hold a charge, it may be time to replace them. Also if they will be sitting for an extemded period of time , disconnect them.

citizensoldier · 01-25-2008, 09:51

Kind of dumb question but I am just not sure? Is it bad or will you spike the alternator/generator if you jump a truck , leave it running and pull the batteries out? Or jump it with a 24volt jumper and there are no batteries even in the truck? I have been told that there is nowhere for the charge to go while running and it will fry things? Is this true? Must you have at least some old dead batteries hooked up for the power output from the alternator or generator to go? This would be on a deuce or 5 ton truck..

ida34 · 01-25-2008, 10:10

Yes. Keep the batteries in the truck. Even dead batteries.