jump starting from car to bigger vehicle i.e. tractor.

teednab-el

Hope this is relevent here to this forum. Apologies mods if not, feel free to move it.

As both vehicles have 12V batteries. Im just wondering what is the proper procedure for jump starting from a car to a dead tractor battery. Would I be correct in the following, (1)Connect the red lead from the positive (+) terminal of car to the (+) Positive terminal of the tractor. (2) Connect black lead from the negative (-) terminal of the tractor to the negative (-) terminal of the car? Do you need to connect the leads directly to the battery terminals. Someone told me before that you need to connect them without touching the nodes fully? Has anyone got pics or links to show the procedure?

Got a bad fright years back when I was young. I accidentely connected the wrong terminals to each other and caused a cloud of sparkes like fire works. Funny enough I never like the thought of jump starting a vehicle since.

Thank you.

mukki

your fine

its + to + and - to - alright

is the tractor normally hard to start when cold or is it airlocked


if so probably best to use a second tractor, as it might need a few mins of cranking

lifer_sean

Try leaving the car idling for a while (10-15 mins) with the leads connected so that the alternator on the car will charge the tractor battery some bit before trying to start. Saves trying to provide the full current for starting across the jump leads. This will work very well if your leads are fairly light and not heavy duty.

Re. connecting directly to poles on battery ... always put red lead directly from + on good battery to + on donor battery first. Some people will then tell you to put black lead from - on good battery to engine block of dead car. The reason for this is that if there is a spark when you connect the leads, the spark is not near a battery, and esp not a good battery. When a battery is charging it gives off an explosive gas, so you don't really want a spark near that !

Buford T Justice

mukki wrote: »

your fine

its + to + and - to - alright

is the tractor normally hard to start when cold or is it airlocked


if so probably best to use a second tractor, as it might need a few mins of cranking

I agree. It can take a fair load to swing a tractor, and it could be a fair auld strain on the car, and if the jumper cables would need to be good and heavy, not the cheap crap that you can get in Halfords. Best to use something equal in size to the Tractor, or leave the car hooked up to the tractor for a while before (leaving car running) to transfer some of the power accross.

fonecrusher1

This might help?

https://www.youtube.com/watch?v=cB3SnrgsycA

If the tractor still isnt starting with the leads connected rev the car engine a few times while someone else is trying to start the tractor's engine. Simultaneously if you know what i mean.

Avns1s

lifer_sean wrote: »

Try leaving the car idling for a while (10-15 mins) with the leads connected so that the alternator on the car will charge the tractor battery some bit before trying to start. Saves trying to provide the full current for starting across the jump leads. This will work very well if your leads are fairly light and not heavy duty.

Re. connecting directly to poles on battery ... always put red lead directly from + on good battery to + on donor battery first. Some people will then tell you to put black lead from - on good battery to engine block of dead car. The reason for this is that if there is a spark when you connect the leads, the spark is not near a battery, and esp not a good battery. When a battery is charging it gives off an explosive gas, so you don't really want a spark near that !

Pretty good advice there, but I would say keep the car revved at about 2000 rpm so that you are actively charging the tractor battery for the 10 mins. The car will be chaging at idle but very little and will be a long time having any significant input to the tractor battery.

As regards connecting the "-" to the engine or the battery, it is generally easier to get a good connection on the negative pole of the dead battery. Just connect the black cable to the "-" of the good battery first and then to the "-" of the dead battery. (As mentioned, you should have connected the Red lead to the "+" terminals on the respective batteries first!)

There is no way a battery for a petrol engine will jump start a tractor, unless it's a very very small engined tractor from years back. If the car is a diesel you may have a chance but the jump leads would want to be fairly heavy duty. They will get very very hot so be careful with them.

Out of interest what car are you using for this ?

teednab-el

RoverJames wrote: »

There is no way a battery for a petrol engine will jump start a tractor, unless it's a very very small engined tractor from years back. If the car is a diesel you may have a chance but the jump leads would want to be fairly heavy duty. They will get very very hot so be careful with them.

Out of interest what car are you using for this ?

I dont think there is any difference between using a petrol or diesel car to be honest provided the car engine is running idle in the process. Its not as if a battery in a petrol car is any different to that of a battery in a diesel car. The car engine will be running when I do this. I am using a VW Passat Tdi to jump start it. My neighbour did it the other day to start a JD 6920 so it does work. He has done it also with a Renault diesel. He used heavy duty leads also.

cadaliac

RoverJames wrote: »

There is no way a battery for a petrol engine will jump start a tractor, unless it's a very very small engined tractor from years back. If the car is a diesel you may have a chance but the jump leads would want to be fairly heavy duty. They will get very very hot so be careful with them.

Out of interest what car are you using for this ?

+1 about the car battery charging a tractor battery. The battery on the tractor will be physically twice the size.
The jump leads will have to be comercial or heavy duty too.

teednab-el

cadaliac wrote: »

+1 about the car battery charging a tractor battery. The battery on the tractor will be physically twice the size.
The jump leads will have to be comercial or heavy duty too.

The battery would be physically bigger alright but as long as they are both 12V batteries and the car engine is running idle in the process why would that matter?

cadaliac

teednab-el wrote: »

The battery would be physically bigger alright but as long as they are both 12V batteries and the car engine is running idle in the process why would that matter?

12 v is voltage - but the current will be different. I'm not too sure to be honest how the current and voltage actually transfers to the power output of the battery.
I have heard of horror stories with the electrics in cars after jumping other cars but the electrics could have been dodgy in the first place.

OP you are completely in the dark, you don't have a clue. Batteries are rated in terms of cranking power, a small battery from a Clio or Fiesta will not start a car such as a diesel Passat etc. Why do you think they are all different sizes and prices ? Best of luck with the tractor, the Passat battery may start it but I doubt it. Also contradicting folks who give good advice is not particularly decent of you.

It's ironic the person who queried how to actually jump start a vehicle from another then becomes an expert and questions good advice.

tossy

the voltage of the battery isn't the only critical factor its all about the cranking amps,the tractor battery will have a much larger cranking requirement than the car battery,if you leave them connected for a while though you should get enough juice across to crank it,once it's not 6am and -1 out

I would fully agree on good quality jump leads though,the lidl/halford ones are utter crap,and would probably melt with the heat build up.I recently tried jump starting one petrol car to another with these and the couldn't even transfer enough power for that task.

teednab-el

RoverJames wrote: »

OP you are completely in the dark, you don't have a clue. Batteries are rated in terms of cranking power, a small battery from a Clio or Fiesta will not start a car such as a diesel Passat etc. Why do you think they are all different sizes and prices ? Best of luck with the tractor, the Passat battery may start it but I doubt it. Also contradicting folks who give good advice is not particularly decent of you.

It's ironic the person who queried how to actually jump start a vehicle from another then becomes an expert and questions good advice.

No need for that RoverJames. Thats just ignorant on your behalf. Im not going against anybody, and I never said I was an expert. Im sorry if my posts appear to be that way to you. I only wanted to query a few things as I am quite entitled to do on a discussion forum.

Now back to my point, I saw my neighbour starting it with the passat and Im not lieing to you. I was with him. The engine of the Passat was running for 5-10mins and charging tractor battery before he started it and the car was also running before he ever attached the jump leads from car to tractor, It started with no hassle. Like I said earlier he also did it with his Renault Megane Diesel. Thats why I was questioning your advice in the first place.

Fishtits

RoverJames wrote: »

OP you are completely in the dark, you don't have a clue. Batteries are rated in terms of cranking power, a small battery from a Clio or Fiesta will not start a car such as a diesel Passat etc. Why do you think they are all different sizes and prices ? Best of luck with the tractor, the Passat battery may start it but I doubt it. Also contradicting folks who give good advice is not particularly decent of you.

It's ironic the person who queried how to actually jump start a vehicle from another then becomes an expert and questions good advice.

Oh Dear... RJ, with the best of intentions,you're a little quick to jump in there, without a proper understanding of what actually happens when a vehicle is "jump started"

fishtits.... auto electrical engineer, lecturer, etc.

RoverJames

RoverJames wrote: »

OP you are completely in the dark, you don't have a clue. Batteries are rated in terms of cranking power, a small battery from a Clio or Fiesta will not start a car such as a diesel Passat etc.
.

Rubbish,

I have jump started teleporters and a JD 6230 with a 1.3 petrol fiesta in the past. I have also jump started a diesel polo (1.9) same engine as the passat with the fiesta. I have many other experiences of starting a car with other much smaller cars.

johndaman66

RoverJames wrote: »

OP you are completely in the dark, you don't have a clue. Batteries are rated in terms of cranking power, a small battery from a Clio or Fiesta will not start a car such as a diesel Passat etc. Why do you think they are all different sizes and prices ?

I'd be inclined to generally agree with your sentiments RoverJames but for the most part you would get away with starting a vehicle with a bigger battery from a vehicle with a smaller one. I did jump start my 1.6 Vectra from a friend's 1.25 Fiesta once with no problems just for example. I do think that in general a meachnic will tell you that it is bad practice whether you get away with it or not How much of a difference in size would be acceptable or passable is another question I'm sure. I think only a lunatic would attempt to jump a Volvo BM from a Fiat seicento for example:eek:

teednab-el not sure if it has being mentioned but make sure you have the engine of the vehicle you are getting the jump from (i.e. passat in your case) running before you connect jump leads to battery of vehicle (tractor) you are jumping. Otherwise there is a risk you will flatten the battery in the passat I believe.

Fishtits

Fishtits wrote: »

Oh Dear... RJ, with the best of intentions,you're a little quick to jump in there, without a proper understanding of what actually happens when a vehicle is "jump started"

fishtits.... auto electrical engineer, lecturer, etc.

I have an excellent understanding of what happens Mr Fishtits.

I stated a battery for a small petrol car will not start the likes of a diesel Passat. If you don't believe me throw an 063 or similar battery into a diesel Passat and see how you get on. Also the OP did not mention in the opening post that a diesel Passat was to be used. Also as he stated the tractor battery was given time to charge up before cranking, had this not been done I doubt it would have started, again this was advice given by another poster.

Any breakdown worker can testify that when a battery is completely flat quite often nothing short of a booster pack will get the vehicle going.

Regarding the lecturer thing, plenty of lecturers are lacking in their field from a practical viewpoint. I once had a lecturer in electrical engineering ask me to put a battery in his car as he didn't know how.

Oh dear Fishtits

johndaman66

johndaman66 wrote: »

I'd be inclined to generally agree with your sentiments RoverJames but for the most part you would get away with starting a vehicle with a bigger battery from a vehicle with a smaller one. I did jump start my 1.6 Vectra from a friend's 1.25 Fiesta once with no problems just for example. .

Both were petrol engines so no issue If the Vectra was diesel you may have had trouble.

Baylee Most Taco

Baylee Most Taco wrote: »

Rubbish,

I have jump started teleporters and a JD 6230 with a 1.3 petrol fiesta in the past. I have also jump started a diesel polo (1.9) same engine as the passat with the fiesta. I have many other experiences of starting a car with other much smaller cars.

I would think none of those batteries were completely flat

jimmyw

Well yeah you need a fair amount of cranking amps to start a diesel because they have higher compression in the engine and you have to create more heat to get going so you would need a battery that's equal or bigger. You would probably get away with starting a bigger petrol engine with a smaller battery. Reminds me years ago (back in the eighties ) when we used to jump-start a hillman avenger from a Chrysler hunter with made up jump cables from strong household cables:eek:.Got a bit hot;) but done the job and the hunter engine was not even running. How we didn't blow ourselves up I don't know

Oh we even started a fordson dexta tractor with them from a car.

teednab-el

RoverJames wrote: »

I have an excellent understanding of what happens Mr Fishtits.

Also as he stated the tractor battery was given time to charge up before cranking, had this not been done I doubt it would have started, again this was advice given by another poster.

:rolleyes:

Well RJ with the limitied knowledge you said I had in this field, did you read any of my posts before you came on here? If you did read them and I know you didnt, you would have noticed that I have already stated that I was leaving the car engine running while jump starting the tractor, otherwise, anyone, (including myself), would know that both tractor and car wouldnt start.

And for the proof, I had to do it today myself and hey presto it worked without any hassle.

teednab-el

teednab-el wrote: »

:rolleyes:

Well RJ with the limitied knowledge you said I had in this field, did you read any of my posts before you came on here? If you did read them and I know you didnt, you would have noticed that I have already stated that I was leaving the car engine running while jump starting the tractor, otherwise, anyone, (including myself), would know that both tractor and car wouldnt start.

And for the proof, I had to do it today myself and hey presto it worked without any hassle.

You did not say any of that before I posted :rolleyes:
This is your first post

teednab-el wrote: »

Hope this is relevent here to this forum. Apologies mods if not, feel free to move it.

As both vehicles have 12V batteries. Im just wondering what is the proper procedure for jump starting from a car to a dead tractor battery. Would I be correct in the following, (1)Connect the red lead from the positive (+) terminal of car to the (+) Positive terminal of the tractor. (2) Connect black lead from the negative (-) terminal of the tractor to the negative (-) terminal of the car? Do you need to connect the leads directly to the battery terminals. Someone told me before that you need to connect them without touching the nodes fully? Has anyone got pics or links to show the procedure?

Got a bad fright years back when I was young. I accidentely connected the wrong terminals to each other and caused a cloud of sparkes like fire works. Funny enough I never like the thought of jump starting a vehicle since.

Thank you.

teednab-el

:rolleyes:

read post #8. It was in reply to your first post #7. I said everything there. Obviously you didnt see it.

groupb

What a pointless arguement. Look up what "amperhour rating" means and then continue.

tossy

Pointless argument as the OP has suceeded in doing what he wanted to do i.e jump start the tractor.

I've never said this before,but time to lock it up

Fishtits

RoverJames wrote: »

There is no way a battery for a petrol engine will jump start a tractor,

"I stated a battery for a small petrol car will not start the likes of a diesel Passat"

Make your mind up.

Jump starting a vehicle from a smaller vehicle and replacing a large battery (UK ref 110, 80 A/Hr 640 CCA Moll in the case of a diesel Passat btw) with a smaller battery are two different scenarios.

I'm not going into the theory other than state that most booster packs contain a battery no larger than a house alarm...:cool:

The former will most likely work, as testified by teednab-el, the latter probably not.

And don't be so quick to diss lecturers, some of us earn our crust in the real world, joining the leather elbow patch brigade for the evenings...

PS anyone help on how you do the multiple quote thingy?

Avns1s

I agree tossy. A case here of people knowing the theory but not the practicality methinks!!

Theory says you shouldn't or even can't start a tractor off a car battery, but in reality, it's done every day of the week.

guil

Fishtits wrote: »

PS anyone help on how you do the multiple quote thingy?

see the button after the quote button, click that on every post ya want to quote and click reply or else just clcik quote on the last one and they will be in the reply aswell

Fishtits

Avns1s wrote: »

Theory says you shouldn't or even can't start a tractor off a car battery, but in reality, it's done every day of the week.

Theory states its possible, hence it happens... every day of the week.

Fishtits

guil wrote: »

see the button after the quote button, click that on every post ya want to quote and click reply or else just clcik quote on the last one and they will be in the reply aswell

Thank you sir.

PS sorry for the drift.

Avns1s

Fishtits wrote: »

Theory states its possible, hence it happens... every day of the week.

OK well I stand corrected then. Important point is your second one imo, it happens every day of the week. OP asked how to do it, and those of us who have done it regularly tried to explain and very surprisingly, it worked!!

Gents I'd like to point out that in my initial post I did say that there would be a chance of jump starting a tractor if the car was diesel. I still maintain a petrol car wouldn't do it unless as I also said the tractor was an ancient thing with a tiny battery.

Booster pack batteried are strong enough to supply enough current to start diesel cars with fully discharged batteries, a petrol car won't unless the dead battery is allowed to charge for a period before cranking.

Cookie_Monster

I've seen a micra jump a transit before. Not quite same scale but I reckon it probably do-able