Need opinions about fan and generator changes

Dodgeit

Member
Leave the fan, or delete fan and add electric fan in it's place.

Generator or Alternator?

Looking for which options would be less drag on engine.
 
Taking the mechanical fan off the engine will certainly lighten the load, but probably not enough to notice. The nice thing about electric fans is they are efficient and safe (simply cannot get fingers near the blades). That being said, most electric fans draw enough current that you will need an alternator to keep up with it. A typical one wire 12V GM style alternator will put out 63 amps max, where as a generator usually puts out around 8 amps. A 14in or 16in electric fan will likely draw over 10 amps. The alternator will not only charge the battery faster and run your electric fan, but will also have capacity to run other electrical equipment such as fuel pumps, water pumps, lights, etc. if you wish.

Zack
 
If you use a one wire alternator, you can install a simple toggle switch to deactivate it AND the electric fan while pulling and then at the flip of a switch, the alternator and electric fan comes back on to charge and cool while you go back to the pits. we have used this method for many years in dragracing and it works great.
 
I run a one wire alternator on my G with toggle to shut off while
pulling have been kicking around idea if running aluminum rad
with electric fan.. How would u run the alternator without a fan
in a jd tho?
 
Hi
definatly take the fan off you might be surprised
how much power you gain. I ran Detriot 60 series
engine tandem grain trucks for a guy about 400 hp
I think, when running at 4 mile an hour down the
side of the combine if the fan kicked in it would
drop the truck back a few mph.
Then go back up when it kicked out so power was
going some where!.
I put a 510 perkins in a pull tractor took the
fan off and fitted electric, freed the motor 300
rpms and had to shut revs back for tech . I never
used a thermostat switch just my eye on the gauge
and flicked the switch if needed after a pull. I
would recommend fitting a thermo switch to guard
against operator error. Maybe set it so the
tractor runs a little hot to help keep bores from
glazing and the motor will probably work better
for it.
Most motors like hard work and getting warmed up
good from my experience. Alternators fans and
water pumps all sap power. A guy in the u.k that
pulled a ford major took it all off and used
electric instead of mechanical , then just re
charged the battery in the pits with a generator
and booster after the run.
Regards Robert
 
I run an A with no fan shaft and the alternator is run off of the flywheel. It has a pulley bolted in the holes just outside the crankshaft and the alternator sits between the flywheel and the brake. It works nicely and is not in the way.
 
I pull a MM diesel, with NO charging system at all. I have a 14" electric fan, and electric water temp guage and tachometer, and an LED under dash light that are all on one main switch, meaning they"re all on at once, including the back lights for the guages. I have an over ride (on) to turn the fan on any time, and it"s also on a thermal switch. All that being said, I have a large truck battery on it, and make sure it"s fully charged before I leave the house. It makes it through a full day of pulling, normally 2 hooks with plenty of battery left when I get home to start it on the trailer to unload. At a 2 hook pull that"s usually 3 or 4 starts. I always turn my fan on just before I take off down the track, and it runs until I"m back to the pits every time, I just let the thermal switch take over then. It"s not uncommon for my fan to run almost 5 minutes after I park. I had trouble only twice this summer. Once when I was done pulling and walked away from the tractor and forgot to turn the fan override switch off, and the second was due to not having the charger on long enough after that one, so the next pull the battery was low. I did always make sure to park the tractor in such a way that I could hook my jumper cables either to my truck or other tractor if I needed to. Hope this helps...I don"t own any gas tractors, so I don"t know how much juice you need for ignition LOL!
 
run a single wire alt. and run a electric fan that runs off temp sensor and relay so it only kicks on when you need it......also look into running a electric water pump and get rid of belt or gear driven one to while your removing extra parts.... not shure how jd are hooked up? just an idea?
kelly
 
(quoted from post at 15:57:30 11/02/12) I just bought this one for my A and it fits pretty nicely with some bracket modifications
one wire alternator

That's a nice set up. I ordered one from Brillman. They supposedly charge at a lower rpm. A JD "A" is running flat out at the rpms most alternators start putting out juice.
 

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