jump starting 24 volt equipment

[fixou812]

Bravo Nelson I wish you said that

 

[fixou812]

Greg you are right! But assuming they are good batteries you can unbound.them ground*) and charge them with the welder

 

[overworked]

If we have good batteries we disconect from machine, set welder at about 100 - 140 amp for a little bit to charge em up, then hook machine up and start, miller bobcats about 29 volts if i remember. We start welder with cables hooked up.

 

[powerjoke]

I have a little briggs&stratton motor with a handle on top of it and a belt running a 24v alternator, works like a charm and only takes a few minutes I also have a big 12/24v jump box on wheels that has 6 optima glassmat batteries in it but it cost about $1200 and weighs about 350lbs so most of the time we use the gas powered alternator that only weighs about 50#

Oh and btw if you have a 12v system for example on a peterbilt and you hit it with 24v the ole girls will start in the coldest weather and have NEVER damaged an ECU or anything elecetronic by doing so, just make sure you have a few batteries in the truck to help absorb some of the higher than normal voltage.

Or as others have said, I've done it off my pickup countless times, just hit one battery at a time or use 2 trucks.

The other day snapon stopped by with a fancy ass $500 battery pack and it wouldn't even make the starter hit hardly.

One other thing we carry on the trucks is homemade jump boxes, I use small-ish gel sell batteries (windmill power supply batteries) and put them in a PLASTIC ammo can with short cables, they work better than ANY factory made jump boxes that I've ever bought, I've seen 24v gel cell batts but have never taken time to build a 24v pack,,,,,, maybe someday


Pj

 

[steve15]

Hi Powerjoke,
would be interested in seeing a picture of your little homemade engine with the 24 volt alternator please?

need al the help i can get up here

 

[Shimmy1]

Oh and btw if you have a 12v system for example on a peterbilt and you hit it with 24v the ole girls will start in the coldest weather and have NEVER damaged an ECU or anything elecetronic by doing so, just make sure you have a few batteries in the truck to help absorb some of the higher than normal voltage.Pj

Now that would be a recipe for disaster. JMHO.

 

[roddyo]

A friend of mine used to sell between 300 and 400 big trucks a year. The 12/24 volt jump box was strapped on the back of a golf cart. I'm guessing he jumped thousands of trucks using 24 volt without a problem. I've probably jumped 50 that way myself.

It was a two person operation though. As soon as you hooked the cables someone was in the truck cranking.

Snap On used to sell a 12/24 volt gas powered booster like PJ built.

 

[SidewinderGlenn]

A friend of mine used to sell between 300 and 400 big trucks a year. The 12/24 volt jump box was strapped on the back of a golf cart. I'm guessing he jumped thousands of trucks using 24 volt without a problem. I've probably jumped 50 that way myself.

It was a two person operation though. As soon as you hooked the cables someone was in the truck cranking.

Snap On used to sell a 12/24 volt gas powered booster like PJ built.

Years ago a friend of mine had a factory built charging unit made out of a smallish Mac chainsaw (no bar or chain) that ran a v-belt to a one wire GM alternator. Was a sweet little light weight unit.

 

[steve15]

Interesting

A friend of mine used to sell between 300 and 400 big trucks a year. The 12/24 volt jump box was strapped on the back of a golf cart. I'm guessing he jumped thousands of trucks using 24 volt without a problem. I've probably jumped 50 that way myself.

It was a two person operation though. As soon as you hooked the cables someone was in the truck cranking.

Snap On used to sell a 12/24 volt gas powered booster like PJ built.

Yea I have heard that works great.

what's the trick when to letting off of the 24 volts?

I hear only do it while the starter is engaged this way it's only getting 17.5 volts.

I`m looking into purchasing 5 of these magnetic oil pan heaters and welding up an aluminum box and placing them in there some way and running them off of a 3000 watt inverter wired into my service truck to heat the oil up.

Any Thoughts on if this might work?

http://www.oreillyauto.com/site/c/d....oap?ck=Search_N0653_-1_-1&pt=N0653&ppt=C0076

 

[steve15]

any pics of that briggs&stratton motor ??

 

[Jonas302]

I dont quite see your idea are you trying to heat up your bulk tank oil or?

 

[roddyo]

Yea I have heard that works great.

what's the trick when to letting off of the 24 volts?

I hear only do it while the starter is engaged this way it's only getting 17.5 volts.

I`m looking into purchasing 5 of these magnetic oil pan heaters and welding up an aluminum box and placing them in there some way and running them off of a 3000 watt inverter wired into my service truck to heat the oil up.

Any Thoughts on if this might work?

http://www.oreillyauto.com/site/c/d....oap?ck=Search_N0653_-1_-1&pt=N0653&ppt=C0076

As soon as you quit cranking unhook the cables.

 

[lantraxco]

We had a battery cart with two 8D's you could hook up series or parallel, had a big solenoid contactor on it with a wired remote so you could turn the key in the truck or piece of equipment then hit the remote button to bring in the jumpers. No sparks or shorts that way, and you could bring in 24V on a balky 12V unit. This was before the computers came in though, I wouldn't want to chance it with today's rigs.

 

[steve15]

I dont quite see your idea are you trying to heat up your bulk tank oil or?

Yea trying to heat up the oil to help the pistons move a little bit.

 

[Delmer]

I`m looking into purchasing 5 of these magnetic oil pan heaters and welding up an aluminum box and placing them in there some way and running them off of a 3000 watt inverter wired into my service truck to heat the oil up.

Would you stick the box against an engines oil pan? Why use a box?

5 heaters at 300 watts each = 1,500 watts. IF 1,000 watts gets into the oil then that would heat 10 gallons of oil 50 degrees F in about 10-15 minutes. That rough guestimation will be most accurate at the beginning when the oil is at the same temp as the surroundings, and much less accurate as the oil starts losing more heat as it gets hotter than the surroundings.

 

[steve15]

sounds like it might work hey?

was just going to mount them in a box so i`m not fighting vs cables etc when its - 40 C

need every bit of help when I get a service calls from a truckers that turn off there truck and plug it in overnight and don't bother checking if the cord is any good.

real challenges here trying to get these frozen diesels started.

 

[Jonas302]

Ok I've played with those oil pan heaters and it is akin to peeing in the wind they are more like leave on overnight and it might keep some temp in as your engine cools down When I did those jobs here in MN we would bring out a good sized genset get the truck plugged in fix cord ect build a little shelter around the truck with cardboard and plywood shoot a torpedo heater under the truck heating the oil pan and engine bay another torpedo heater on the fuel tank 3 or four large chargers one on each battery wait an hour or two go do some other jump starts or pick up filters and some 911 so when it stalls on there #2 summer blend they put in in texas you can change filters write a bill for 600 dollars and wait for the next -40 day when the same dopy truck driver calls

 

[dieseldog5.9]

I don't jump start anything off my truck as a rule, I carry a few jumper boxes and use more than one if needed. If I need more juice a buddy of mine has a gas powered jump starter that does 12 or 24 volt and propane heaters with directional heaters.

Years ago I worked with an old timer who jump started with his welder all the time, the company bought his welder and he had no problems, I bought mine and figured a jumper box was cheaper than my Miller trailblazer.

 

[Queenslander]

any pics of that briggs&stratton motor ??

Not a B&S, but there are several of these Honda powered alternators on the market here.
24v, 40amp continuous output.

 

[steve15]

Thanks for the picture queenslander.

been doing some googling this morning and looks like you can get those in 200 plus amps from different manufacturers.
Have a 200 amp alternator on my rig but hate putting so much of a load on it.




looks like these guys make some 320 amp ones to?

http://www.americanpowerinc.com/DC Gen.htm