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  1. #11
    Gold Member Winmac's Avatar
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    Dec 2011
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    Landini 6860

    Default

    On the trailers I've seen most had a 5 amp thermal resetting circuit breaker inline on the bat + charge wire.
    If the battery draws more than 5 amps the current constantly switches on and off, not a good way to charge a battery.

  2. #12
    Super Member schmism's Avatar
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    Jul 2006
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    5,093
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    Peoria IL
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    New holland TC(33)

    Default Re: Charging a dump trailer battery

    whats short haul mean? Loading it with some industrial sized machine that takes 1/2 bucket to fill your trailer then down the road 2 miles dump, and return? If so your cycle time would be less than 5 min.

    If you load for 10 min (like with a bobcat or CUT) then short haul...(down the road 1/2 mile) dump and return that still is a 15 min cycle. If you leave the tow vehicle running that entire time It should be long enough to recharge the battery on the trailer if wired correctly.

    I have mine setup with a 10ga wire running from my vehicle battery with a 20amp circuit breaker.
    Steve - TC33D 4x4 FEL, dual rear remotes with toys

  3. #13
    Veteran Member
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    Feb 2012
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    Northern Michigan
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    KIOTI DK50 HST

    Default Re: Charging a dump trailer battery

    You left the vehicle running when you were loading and unloading right? I quit letting anyone borrow my dump trailer because even if they had a charge circuit [most didn't] they would shut the vehicle off to "save money on gas" So the battery would get drained [and damaged] by somebody being cheap. Now that I quit being nice I have never had a issue with the standard 20 amp charging system on my 3 trucks keeping up in any situation. CJ
    Edit previous post covered it also.
    Kioti DK50HST Cab
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  4. #14
    Elite Member 4shorts's Avatar
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    Jul 2008
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    3,222
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    Bay Roberts, Newfoundland
    Tractor
    Kubota 5740,BX25D

    Default Re: Charging a dump trailer battery

    Yup. Short trips can take a dump trailer battery down fast. Now if your trailers dump is also powered down then the battery can't keep up. I keep mine on a trickle automatic charger whenever it's not hooked up to the truck. That way I know I'm heading out with a fully charged battery.
    Attached Thumbnails Attached Thumbnails Charging a dump trailer battery-image-jpg  
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  5. #15
    Bronze Member
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    Oct 2012
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    50
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    Western PA
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    Cub Cadet 147, Ford 80, 4610

    Default

    Thanks all.

    My car, a 2005 Durango, sends 12v to the trailer even with the ignition off.

    I let the car idle, it still only made 9 dumps, power up and down.



    On Saturday, I bought a brand new Sure-Trac 5x10 dump trailer. The salesman said most of these are good for 8-10 dumps before recharging, and I should use a different charger when I park it. He said the trucks charge it too slow to help much, and that seems right to me. The Durango only has a 10 amp fuse and light gauge wire to the trailer charging circuit. I am not inclined to pull heavier wire when my battery charger will do the job. I have one at home and at the farm, no problem.

    Now that I own a trailer, I won't need to push as many consecutive trips, since I can load any weekend.

  6. #16
    Veteran Member KiotiKowboy's Avatar
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    Northeastern Oklahoma
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    Kioti DK50SE HST Cub Cadet UTV Swisher RC17552BS NRA_Life

    Default Re: Charging a dump trailer battery

    8 - 10 dumps on a charge? That's nonsense. I ran dozens of loads on my 6x10 dump before recharging the deep-cycle battery.

  7. #17
    Super Member George2615's Avatar
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    Feb 2005
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    Central Square, NY
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    LS XR3037HC

    Default Re: Charging a dump trailer battery

    Quote Originally Posted by bja105 View Post
    Thanks all.

    My car, a 2005 Durango, sends 12v to the trailer even with the ignition off.

    I let the car idle, it still only made 9 dumps, power up and down.



    On Saturday, I bought a brand new Sure-Trac 5x10 dump trailer. The salesman said most of these are good for 8-10 dumps before recharging, and I should use a different charger when I park it. He said the trucks charge it too slow to help much, and that seems right to me. The Durango only has a 10 amp fuse and light gauge wire to the trailer charging circuit. I am not inclined to pull heavier wire when my battery charger will do the job. I have one at home and at the farm, no problem.

    Now that I own a trailer, I won't need to push as many consecutive trips, since I can load any weekend.
    Have you checked for power to the plug since your use. You may have blown the charge fuse. If you do have voltage it should be over 13V with the engine running. Check it at the plug then at the trailer battery.

    On my dump trailer I had to add a ground wire from the battery to the trailer frame. The factory ran the battery cables directly to the hyd. pump body and relay which is mounted in a plastic tongue box. The pump worked off the trailer battery because the hot and ground were connected directly but my truck plug couldn't charge the battery because the trailer battery wasn't grounded to the frame to complete the circuit.
    So, double check to see if the charge wire from the truck does feed the trailer battery and make sure the trailer battery ground connects to the frame.

  8. #18
    Platinum Member The Fred's Avatar
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    Jun 2013
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    hOOterville
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    Couple of Orange Clunkers

    Default Re: Charging a dump trailer battery

    Takes a good 24 hour period to properly charge a battery at 14.4 volts. That thing will draw a good amp or two up until it's just about done.
    Open circuit voltage of a fully charged battery is 12.6 volts.

    Fred

    Charging Information For Lead Acid Batteries
    If you can't fixit trade it....

  9. #19
    Veteran Member
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    Feb 2012
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    Northern Michigan
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    KIOTI DK50 HST

    Default Re: Charging a dump trailer battery

    I can only get 2 complete cycles then half way through the third it dies. I know 100% the battery is good and it is from a full charge. I also have meters that tell me the condition of the battery and it is still above it's rating so it is NOT a bad battery. When this trailer is hooked up to any of my trucks it never has a problem. CJ
    Kioti DK50HST Cab
    401 FEL
    Saws, 338xp,346xp mod,372xp mod, 390xp, Stihl combi 130 trimmer.

  10. #20
    Veteran Member David_Kb7uns's Avatar
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    Willamette Valley Oregon
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    Kubota X 4

    Default Re: Charging a dump trailer battery

    Had interstate battery in my Load Trail dump trailer that would not go a full dump cycle but passed a Midtronics tester and a carbon pile test.

    The Interstate dealer did one last test with a hydrometer and one cell was bad, so battery faults are not always picked up by modern testers. Even blew the charge fuse on the truck when dumping because battery voltage dipped so far solved that by putting thermal circuit breaker 5 amp less rating then truck charge fuse.

    Also have 2 small 5 watt panels with charge control to maintain and plug in if possible for a bulk charge or use small generator if needed.

    David Kb7uns
    Grand L3130GST LA723 Loader, ATI grapple, ATI grapple bucket, WR Long front remote, Kubota rear remotes, Bradco 408 Backhoe with thumb, 60"KK brush hog, 60" RM Finish Mower, Speeco Post Auger, 72" KK rear blade, 60" box blade
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