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 02-13-2002, 08:24 Post: 35557
dh
2002-02-13 08:24:50
Post: 35557
 additional lights

I want to mount two additional lights on a TC25D. I have a rear facing light already installed and I am wondering if the alternator will handle the two additional forward facing lights. Any one have any experience with this?






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 02-14-2002, 04:59 Post: 35585
TomG

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 additional lights

Two 55W lights draw about 9 amps, while 2 35ís draw just under 6A @ 12V. I don't know the rating of the tractor's alternator but I'd be surprised if it was less than 25A. Two lights should be fine, but I would verify the alternator rating. Many Kubotas have a fused circuit and outlet (under the seat I think) that is useful for connecting aux lights. I don't recall if the circuit is fused at 10A or 15A. A 10-amp fuse is slightly small for a 9-amp load, but it should work OK. I ran my lighting circuit directly from the battery and used an in-line fuse holder.






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 02-14-2002, 05:07 Post: 35586
TomG

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 additional lights

Upps! Read thoroughly before commenting I guess. I missed that we're talking about three lights, which would draw just under 14A @ 12V. That load would blow a 10A circuit for sure and would be marginal for a 15. If you're running all three from an 15A aux circuit, a 14A load may occasionally blow a fuse, and I'd just try it and see what happens. Otherwise, it's easy enough to run an additional circuit from the battery, with due regards for alternator rating of course.






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 02-20-2002, 09:20 Post: 35748
dh
2002-02-20 00:00:00
Post: 35748
 additional lights

Thanks for the info.






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 02-20-2002, 14:48 Post: 35754
StephenR



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 additional lights

Since you have the "D" you have 4 lights up front 2 of those on the side. Do those actually help having them on the side? From the brochure, it looks like the loader arms would block any light coming from them?






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 02-20-2002, 19:08 Post: 35759
cutter



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 additional lights

I had the "D" as well. Those lights on the side help when mowing somewhat, but loader work at night is tough because your lighting is blocked due to the inherent nature of their positioning. I remember seeing rear fender mounted lights that were forward facing on the 55 series J/D's and always thought that was a better idea. They included two sealed beams on the front as well, I believe. Best setups I have seen lately are those high intensity driving lights the size of a half dollar mounted high on the roll bar. Inexpensive too!






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 03-20-2002, 11:25 Post: 36533
RHumphreys
2002-03-20 00:00:00
Post: 36533
 additional lights

I would suggest that you run a separate circuit for the lights with a relay and switch. This circuit should be fused slightly above the lighting amp draw. Run the circuit to your battery or fuse box main positive cable lead. The relay will prevent surges that could fry switches or worst yet you tractor wiring!






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 03-21-2002, 08:33 Post: 36572
TomG

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 additional lights

In a properly engineered circuit, fuse protection should be adequate to protect against surges. However, all components, including wire gauge and switches should be rated for the fuse protection, and slow-blow fuses shouldn't be used. Relays are often used when loads would require large fuses and correspondingly huge switches and heavy gauge wiring throughout a circuit. A bunch of lights could well be a load that could use a relay to advantage.

A misconception that's pretty easy to fall into is: 'Well it's only 12V so almost anything will be OK.' Switches are rated according to their power dissipating ability, as well as voltage. Power dissipation is solely due to the current flow and the internal resistance of the switch. 10A through a switch at 12V and 10A at 120V dissipate the same power.

The point is that lighting at 12V draws a lot of current. Four 55W lights at 12V draws just over 18A, not including an allowance for initial surge. An 18A 12V switch is bigger than somebody may want to put on their dash and wire with heavy gauge wire.

Another thing to consider is that many tractors have 25A rated alternators. Four 55W work lights plus other lighting and accessories on a tractor may exceed an alternator's capacity. With high loads, an alternator won't recharge the battery as fast or at all after using glow plugs and the starter. With loads that exceed an alternatorís output, the battery probably supports the load until the battery voltage declines. Iíd have to read up on regulators a bit, but I seem to recall that a regulator provides over-current protection for the alternator.






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 04-10-2002, 14:16 Post: 37253
dh
2002-04-10 00:00:00
Post: 37253
 additional lights

I think the TC25D has a 40 amp alternator.
Would this be enough to run the, I believe 4 head lights one 35 watt rear facing light and two additional 35 or 55 watt lights mounted on the rops?






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 04-11-2002, 06:33 Post: 37275
TomG

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 additional lights

If they are all 35W's, I count seven lights that would draw just over 20A if they were all on and about 24A if two were 55W. Sounds like the alternator would carry it, but the recharge times following pre-heat and starter use probably would be longer.






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