Case450 cold start question?

Mr. T. Minnesota · Dec 8, 2014

Forum Members,
Somehow missed the write up on crawler cold starts. Read through it this morning and found it to be very informative. I have been using a 12 volt battery to start a '41 R2 Cat gas crawler that has a 6 volt starter. It starts very well even in cold weather. I am using a 31 series battery with jump assist and tank heater on the HD3 Allis and it is a little tentative. Is using 24 volts on a 12 volt system the same as 12 volts on a 6 volt starter? I have a big 6 volt battery I could use in a series with the 31 series battery to get 18 volts in the starting cycle. What do you think? Any and all thoughts are welcome.
Mr. T. Minnesota

AJ. · Dec 8, 2014

Case450 wanted to be able to use his machine's without having to use ether or jumper cables,the 24V option is the most likely to enable him to do that,changing to 24v the charging has to be considered,the most straight forward way is to fit a 24v alternator,if there are cabs on the machines and they have heat,air,wipers,radio and lights etc they can be kept at 12 volts by altering the wiring,you going to 18v would probably be enough for your HD3,it was a generator and a regulator that was originally fitted,I am not sure if the regulator can be adjusted to put out 18v,the other option is change over to 24v or you may get an 18v alternator at an auto audio shop they use 18v for those high powered amps,24v would be my choice,make sure you push the stop control to the run position and put the throttle on full after you stop the engine.
AJ

Mr. T. Minnesota · Dec 8, 2014

AJ,
Thanks for the reply. My main concern is starting the HD3 in the middle of the winter so I can plow snow on the 3/8ths mile farm road in northern Minnesota. The 18 volts is only for winter starts. I will be at the cabin this week for a few days and plan to heat the cat building, plug in the tank heater and set up the 18 volt system (short term). Checked in with an electrical automotive shop today and they said the 18 volts should be used with care, do not over heat the system. Any other thoughts are welcome.
Mr. T. Minnesota

AJ. · Dec 8, 2014

If you machine is housed and has a block heater it should start on the 12V with out anything else,is all your connections clean and tight,is the battery good,maybe a trickle charger would keep the battery topped right up,if that fails just use the 18v for to start,you can buy all sorts of on/off timers nowerdays cheaply to turn the charger or heater on or off,make sure your antifreeze is up to strength,never depend on a tank/block heaters in case of a power cut.
AJ

JDemaris · Dec 9, 2014

I have several Case diesels - 188s and a 207. All will crank fine at 0 degrees F with the proper 12 volt battery. Will 24 volts work - yes. Is doing so the same as using 12 volts on a 6 volt starter? Probably not exactly. Most of old 6 volt starters were very heavy built and sustain over-volting very well. The newer 12 volt starters, depending on make, are not always all that overbuilt. Mine are Delcos.

Battery power drops to 1/2 at 0 degrees F. So whatever batteries work well for you in warm weather - you likely need twice as much in cold weather. If your Case cranks at 9 volts with a 12 volt battery, bringing that cranking voltage up to 10 volts can make a huge difference in cranking speed. That can be done with just a bigger, or more 12 volt batteries in parallel.

But it's your machine. If you like 24 volts for cranking, go for it. You can do that with a series-parallel starter switch and keep your 12 volt charging system if you want.

Case450 cold start question?

Mr. T. Minnesota

Member

AJ.

Well-known Member

Mr. T. Minnesota

Member

AJ.

Well-known Member

JDemaris

Well-known Member

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