Tow Behind Sprayer Amps
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    Tow Behind Sprayer Amps

    I'm looking to buy the NorthStar sprayer for my X739. I'll be doing a direct to battery because it can draw up to 20amps (12v outlet is only rated for 15). Any issues going direct to battery?

    https://www.northerntool.com/shop/to...9533_200649533
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    AlKozak's Avatar
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    Quote Originally Posted by jobes View Post
    I'm looking to buy the NorthStar sprayer for my X739. I'll be doing a direct to battery because it can draw up to 20amps (12v outlet is only rated for 15). Any issues going direct to battery?

    https://www.northerntool.com/shop/to...9533_200649533
    No. Use at least a 20A inline fuse - preferably 30A - located close to the battery. Use 10AWG stranded wire to minimize voltage drop.

    Reading the manual, it looks like it comes with a wiring harness designed to be directly connected to the battery.

    Al
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    Since you are going to be temporarily routing the wire to the battery, be careful the wires doesn't get caught up in pulleys, belts, pedals, etc. You definitely don't want a dead short with it hooked right to the battery and if you smash the two wires or crush them together, it's going to require a good fuse.........and likely new sprayer harness.

    I ran my sprayer with the spring clip battery clamps for years and it worked fine. If you can get a wireless remote for turning the sprayer on and off, which are available very reasonably, it makes operating the sprayer that much easier........Or at a minimum, position the on off switch in the harness where it's in your hand while operating the sprayer and driving your tractor.

    The wireless controls are available through many of the sprayer companies or TSC for around $30 to $40 often......They are very handy to have.
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    Randog's Avatar
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    My 40 gal 3 point came with the AM135368 which is the battery harness with an inline fuse, quick connect near the battery, also one which would reach near to the operators station and has a cloth sheath over the power wires. Rocker switch in line to turn the sprayer on and off. A bit pricey at $92.30

    Maybe if you have more money than you are handy. LOL

    Click image for larger version. 

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    I think these pumps have an artificially high amp rating,,,

    I have a left rear light that is MIA,,



    At the risk of a fuse, I decided to connect the FIMCO sprayer to the connector that normally powers the missing light.

    The sprayer I did the test with was this sprayer,,



    The lighting circuit powered the pump just fine, no blown fuse,,

    Could it be the pumps are rated high, so that we think we are getting a powerful pump?
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    I have a Fimco 40 gallon sprayer which is somewhat the same sprayer. I know Northern says the pump can draw a "maximum" of 20 amps, although, there is no way this pump will draw 20 amps and operate continually at 20 amps. It would burn up in a short amount of time.

    I checked mine with an amp meter. It draws no more than 5 amps and normally not that. It spikes to about 5 amps when initially turned on.

    The wiring harness on the fimco sprayer is 16 gauge wire and has an inline fuse holder. This wiring and fuse holder isn't able to handle 20 continual amp draw. I have a 7.5 amp fuse in this fuse holder and have never blown a fuse.

    On my 1025R, there is a power outlet on the right fender which is also fused protected at 15 amps. I have plugged my sprayer into this outlet since I got it (3 years), and have used it a fair amount. Because my inline fuse is 7.5 amps, this fuse would blow first, and I have never blown this fuse.

    Get an accessory type plug and plug it into your accessory outlet. You will have no problems. There is absolutely no need to run wires to the battery to operate an accessory like this. If you want to you can, but you absolutely do not need to!

    Reality check.... this motor is probably a 1/3 HP motor. If the motor were to operate at maximum HP, which it cannot for any long period of time, then it would draw 20 amps.

    746 watts = 1 HP.

    12VDC x 20amps = 240 watts.

    240watts / 746 = .3 HP

    Attached Thumbnails Attached Thumbnails IMG_0663.jpg   IMG_0666.jpg   IMG_0665.jpg  
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    The 4105 is actually the 4th tractor I connected a sprayer to the lighting circuit,,,

    Right taillight was missing on this 1861 Cub Cadet,,,



    This is a 2284 Cub Cadet with a trailer plug connected to the lighting circuit,,




    This is a trailer plug added under the seat of an 1872 Cub Cadet,,,



    The 1872 pulled a DIY sprayer,,

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    Quote Originally Posted by CADplans View Post
    I think these pumps have an artificially high amp rating,,,
    I was wondering about that myself. I know Northern listed the specs as 20A but all I could think of was how is that little pump motor drawing 20 AMPS?
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    I have the 30 gallon sprayer from northern tool, max is listed at 8 amps. Intake/pump was plugged with fertilizer a few weeks ago. Burnt out a 15 amp inline fuse.

    Sent from my SM-N950U using Tapatalk
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    Quote Originally Posted by jgayman View Post
    I was wondering about that myself. I know Northern listed the specs as 20A but all I could think of was how is that little pump motor drawing 20 AMPS?
    I believe when they list amp draw, they list the maximum possible amp draw at rated HP, although, these small motors can not draw full amps for more that a very short amount of time or they would burn up. They are not 100% duty cycle motors because they are not intended to be used that way.

    The way they operate, these motors run at less than 50% HP and therefore at less than 50% amp draw.

    The Fimco sprayer motor parts list is shown below. You will see, they recommend a 7.5 amp fuse in the motor fuse holder which is what mine has in it and has never blown.

    Most quality motors will have a service factor amp (SFA) rating and then a full load amps (FLA) listed on the plate. The full load amps is what the motor is designed to work at. The SFA is the amount of amps the motor can draw for a limited amount of time.

    My air compressor motor tag is below. You will see the full load amps, 36 amps, is 89% of the service factor amps, 40.5 amps. So, this motor has a service factor of 1.125.

    Many motors made are not "quality" motors. They rate them at an advertised "maximum" HP rating but they cannot produce that HP for more than a few minutes intermittently.

    Getting back to the sprayer. The fuse that protects these motors must not be rated at a higher amperage than what the motor normally draws at its normal duty irrespective of what the maximum rated amperage is. If you install a 20 amp fuse in line with these sprayers, the motor will most likely burn up before the fuse blows.
    Attached Thumbnails Attached Thumbnails Motor Tag_1.jpg   Fimco Sprayer motor.jpg  
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