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Best battery cut off switch for semi?
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Old Pokey
Posted 8/11/2018 20:16 (#6924559)
Subject: Best battery cut off switch for semi?


 What would be a good heavy duty battery cut off switch for the high current applications like a semi ?

 I am looking at this one from Longacre. If I have two cables from the battery like the image in the ad shows, can I hitch two cables to the starter using the alternator pole as a second starter pole?

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hillfarmer
Posted 8/11/2018 20:41 (#6924619 - in reply to #6924559)
Subject: RE: Best battery cut off switch for semi?



Old Pokey - 8/11/2018 21:16

 What would be a good heavy duty battery cut off switch for the high current applications like a semi ?

 I am looking at this one from Longacre. If I have two cables from the battery like the image in the ad shows, can I hitch two cables to the starter using the alternator pole as a second starter pole?



I have been using this style
https://www.ebay.com/itm/Moroso-74100-Battery-Disconnect-Switch-/392...

pollock is another

https://www.ebay.com/itm/Pollak-500712-1967-1968-Master-Battery-Disc...

on the 895, I have a pair, one per battery
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SWND
Posted 8/11/2018 20:45 (#6924629 - in reply to #6924559)
Subject: RE: Best battery cut off switch for semi?



Southwest ND
https://www.ebay.com/itm/Master-Battery-Disconnect-Switch-kill-2post...

These have a high amp rating. I think 600amps.
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Sodbustr
Posted 8/11/2018 20:45 (#6924631 - in reply to #6924559)
Subject: RE: Best battery cut off switch for semi?


Western Iowa
https://www.amazon.com/WirthCo-20259-Battery-Heavy-Duty-Isolator/dp/...

I use this one. Rated at 250 amp continuous and 2500 amps surge.

I have had the first one for several years, holding up fine.



(51LGumyRoAL (full).jpg)



Attachments
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Attachments 51LGumyRoAL (full).jpg (54KB - 242 downloads)
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Trent2520
Posted 8/11/2018 22:37 (#6924859 - in reply to #6924559)
Subject: RE: Best battery cut off switch for semi?



Statesville, NC
I buy some electrical parts from Select Parts, Inc. in Sioux City Iowa. They don't have a website, but very helpful on the phone. All their products seem good quality. They have a switch that I think is rated 1800 amps, and I like it because it has 1/2" terminals. Their phone number: (712) 252-7972.
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tommyw-5088
Posted 8/12/2018 05:44 (#6924995 - in reply to #6924859)
Subject: RE: Best battery cut off switch for semi?


south Texas , York Rife Freemason
Flaming river makes the best / highest rated switches
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dvswia
Posted 8/12/2018 06:52 (#6925043 - in reply to #6924559)
Subject: RE: Best battery cut off switch for semi?


sw corner ia.
don, I got the one for my combine at napa. could also get one from any cat dealer.
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Ron..NE ILL..10/48
Posted 8/12/2018 07:19 (#6925085 - in reply to #6924995)
Subject: RE: Best battery cut off switch for semi?



Chebanse, IL.....

Here's the Flaming River product:

http://www.flamingriver.com/index.php/products/c0015

the JD disconnect for newer combines & tractors works great also. It WILL stand the amp load. Definitely weatherproof also.

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tedbear
Posted 8/12/2018 07:19 (#6925087 - in reply to #6924631)
Subject: RE: Best battery cut off switch for semi?


Southern Minnesota
I have installed the one above on my Eagle truck right in the battery box. I drilled a hole in the aluminum box with a hole saw and two other holes to mount the switch mostly to the outside with some spacers and long bolts. This works well on my truck since the battery box is on the left side. When I shut off the switch, I remove it so it is dangling by the chain to alert me next time before I crawl in. Deere uses this same switch on my 8310R tractor.

My switch breaks the ground connection. To do this the negative or ground posts were already connected together and I rerouted the last one to my switch. The other post of the switch connects to the truck frame. The truck had an electric tarp and third axle added which had gone directly to the batteries. I rerouted those grounds to the frame. With the switch off all ground connections are broken. I have had no battery draw down problems since installing and using this switch. The only downside is my AM/FM radio loses its presets and correct time.

Edited by tedbear 8/12/2018 07:20
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Slugbait
Posted 8/12/2018 08:05 (#6925169 - in reply to #6924559)
Subject: RE: Best battery cut off switch for semi?



Pedee, Oregon
Flaming River. Put it on the ground side.
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IowaMark
Posted 8/12/2018 08:24 (#6925201 - in reply to #6925169)
Subject: RE: Best battery cut off switch for semi?



NW Iowa. / SW Arizona
Slugbait - 8/12/2018 08:05

Flaming River. Put it on the ground side.


I’ve never installed a battery cut off switch so have no experience installing them so am only asking. Why is it better to do the ground side? I would think it would be better to do the hot side of a battery, please correct me why my thinking is wrong. Just trying to learn more as I have a vehicle I want to put a battery disconnect on this winter. Thanks, Mark
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hillfarmer
Posted 8/12/2018 08:46 (#6925261 - in reply to #6925085)
Subject: RE: Best battery cut off switch for semi?



So if the $10 ones I have used for 15 to 20 years and replace once

Would I still not be ahead of the game

compared to one for $130

And I have some on Pos some on Neg

should look were the dozer factory one is on

plus or minus side, just good to have one on, to cut down on the fire hazard
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jedeka
Posted 8/12/2018 09:11 (#6925320 - in reply to #6925201)
Subject: RE: Best battery cut off switch for semi?


Boone, Iowa
The purpose of the disconnect is to interrupt the complete circuit from battery (+) to the powered accessories, to chassis ground and back to battery (-). It is usually easier to install a disconnect to the ground side, since you are working with less cables on the (-) side.
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Ron..NE ILL..10/48
Posted 8/12/2018 09:52 (#6925398 - in reply to #6925261)
Subject: RE: Best battery cut off switch for semi?



Chebanse, IL.....

The factory equipped JD tractors/combines/sprayers use battery disconnects on the GROUND cable.

If a $10 disconnect works for anyone, that's great. We melted a $30 disconnect on an IH Farmall a couple years ago. Not thru abuse either.

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IowaMark
Posted 8/12/2018 09:59 (#6925412 - in reply to #6925320)
Subject: RE: Best battery cut off switch for semi?



NW Iowa. / SW Arizona
I understand the purpose of the breaking of the circuit system hence the breaking of the negative side is usually easier. It must be the stupidity in me but it still looks like it’d be better to break the positive side of the circuit, sure not the first time I’ve been wrong in my thinking however :-(.
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hillfarmer
Posted 8/12/2018 10:11 (#6925437 - in reply to #6925398)
Subject: RE: Best battery cut off switch for semi?



Ron..NE ILL..10/48 - 8/12/2018 10:52

The factory equipped JD tractors/combines/sprayers use battery disconnects on the GROUND cable.

If a $10 disconnect works for anyone, that's great. We melted a $30 disconnect on an IH Farmall a couple years ago. Not thru abuse either.



was it a 6 volt system by chance ?
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Trent2520
Posted 8/12/2018 10:31 (#6925465 - in reply to #6925201)
Subject: RE: Best battery cut off switch for semi?



Statesville, NC
When replacing a battery and you have a wrench on the positive terminal, and you are in close quarters and hit any metal, there will be an arc, even if the disconnect is in the positive cable. If it's in the negative cable and the switch is off, you can't arc if you hit metal with the wrench on the positive side. The only way you can arc is to go between both battery posts with the wrench, when the disconnect is in the ground.
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dvswia
Posted 8/12/2018 10:31 (#6925467 - in reply to #6925412)
Subject: RE: Best battery cut off switch for semi?


sw corner ia.
the reason is the ground wire cannot get shorted to cause a fire.
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hydro70guy
Posted 8/12/2018 11:00 (#6925497 - in reply to #6924559)
Subject: RE: Best battery cut off switch for semi?


Swaledale, IA
To me the main and simplest reason to connect to the negative side is when connecting or disconnecting batteries I have always and always been told to disconnect negative side first,
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Ron..NE ILL..10/48
Posted 8/12/2018 16:38 (#6926090 - in reply to #6925437)
Subject: RE: Best battery cut off switch for semi?



Chebanse, IL.....

No, converted to 12v

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hillfarmer
Posted 8/12/2018 16:59 (#6926136 - in reply to #6926090)
Subject: RE: Best battery cut off switch for semi?



Dad's MH 44 used to eat the push button contacts they had to start them with

switched to 12 volt and thought it was going to switch off the armature it spun so fast

that was with a poor old battery I put in it

would have thought the cheap disconnects would carry a 5 second load of 200 amps
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tedbear
Posted 8/13/2018 08:13 (#6927212 - in reply to #6925497)
Subject: RE: Best battery cut off switch for semi?


Southern Minnesota
hydro70guy - 8/11/2018 23:00

To me the main and simplest reason to connect to the negative side is when connecting or disconnecting batteries I have always and always been told to disconnect negative side first,


Yes and reconnect the negative side last. As I mentioned in my post above be careful to move any direct grounds for add on accessories from the batteries. In my case an electric tarp and auxiliary axle control had been added on after the fact. The installers had wired them directly to the batteries. I needed to move the grounds for those devices to the frame or the frame side of the disconnect switch. If they were still connected directly to the battery they could possibly draw the batteries down which defeats the whole idea. Even worse with the battery disconnect off, if someone tried to start the truck the starter could try to "find" ground through the addon device and likely burn out the rather light ground wire to the add on device.

Some years ago a fellow AgTalker indicated that add on devices generally come with a fuse on their "hot" side. He also put a fuse in on the ground side. Sort of a double protection for situations where a large load item might try to use the light duty item for ground. Probably a good idea although I've never done it.
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hillfarmer
Posted 8/13/2018 10:20 (#6927425 - in reply to #6927212)
Subject: RE: Best battery cut off switch for semi?



the factory trimble harness has a ground on both sides

the ecm on a lot of trucks have fuses on both taps
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Rawleigh
Posted 8/13/2018 15:49 (#6927850 - in reply to #6924559)
Subject: RE: Best battery cut off switch for semi?



White Stone, Virginia
By far the best disconnect I have used. it is made for a boat so it is waterproof to jets of water (pressure washer) and can be mounted just about anywhere. 300 to 600 amps. I used the E series single circuit on a R688ST Mack with great results. I mounted a piece of vertical plate to the drivers side frame rail and screwed the switch to that. Rated 350 continuous amps, 1200 amps cranking (30 sec), 600 Intermittent (5 min.). Lifetime warranty. $38, but it won't melt down on you! It is a really nicely put together product you won't be disappointed in. I wired the positive battery cables through it. You can get the double circuit if you ever want to be able to isolate one set of batteries.

https://www.bluesea.com/products/category/11/Manual_Battery_Switches

https://www.defender.com/product3.jsp?id=183542

$75 for 600, 1750 and 900 amps:

https://www.defender.com/product3.jsp?id=341919

Edited by Rawleigh 8/13/2018 16:17
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jwhit
Posted 8/13/2018 21:40 (#6928520 - in reply to #6924559)
Subject: RE: Best battery cut off switch for semi?


central Iowa
Marking
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Ron..NE ILL..10/48
Posted 8/14/2018 05:26 (#6928754 - in reply to #6927212)
Subject: RE: Best battery cut off switch for semi?



Chebanse, IL.....

Everyone needs to verify that the vehicle (tractor/whatever) is in fact negative ground. Many of the older IHC equipment were positive ground. But, that itself needs to be confirmed because many restorations included updating from 6V positive ground to 12V negative ground. Though, they could be kept as 12V positive ground. Just note which battery terminal leads to chassis ground initially. If it is positive, then one could put the switch on the positive side.

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Ron..NE ILL..10/48
Posted 8/14/2018 05:36 (#6928760 - in reply to #6927850)
Subject: RE: Best battery cut off switch for semi?



Chebanse, IL.....

Rawleigh

What is the approximate physical size of this marine switch? I don't see that in the specs provided, unless I missed it.

Thanks
Ron

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braidy
Posted 8/14/2018 08:15 (#6928975 - in reply to #6928760)
Subject: RE: Best battery cut off switch for semi?


NW Minnesota

Ron..NE ILL..10/48 - 8/14/2018 04:36

Rawleigh

What is the approximate physical size of this marine switch? I don't see that in the specs provided, unless I missed it.

Thanks
Ron




Here you go..

https://www.waytekwire.com/datasheet/78403-Dimensions.jpg

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