My Yanmar SA425 with 4WD Indicator LED

[Razzmatazz]

My wife and son gifted me with a Yanmar SA425. The tractor is awesome, but I wanted a few additions.

First up was a hydraulic top link. The SA425 includes rear hydraulics, so this was an easy install.

Secondly was a grapple and third function. This was financed by the sale of my YM1700B.

Next, my grandson pointed out that this tractor didn't have a horn. And I had already noticed a lack of work lights.

I then caught myself driving down the paved driveway (more than once) in four-wheel drive.

From the electrical standpoint, my planned improvements would overwhelm the 10-amp OEM auxiliary circuit under the seat. So I planned on including relay(s), to manage the current draw.

I was lucky enough to have the help of my brother for this project. Some of what we did might be overkill, but better safe than sorry. All the wiring is wrapped in wire loom.

First, we mounted a relay-controlled fuse block under the seat. We ran 8-gauge cable from the battery to the fuse block. The OEM auxiliary circuit is controlled by the ignition switch, so this triggers the fuse block.

The horn is mounted beneath the factory grill guard. The switch is mounted in the factory cut-out in the fender below the PTO selector. The horn is powered through the fuse block with a 5-amp fuse.

The light bars are mounted to the ROPS with stainless steel u-bolts. The lights are wired to the fuse block with 12-gauge wire. The switches are mounted in the switch box.

The switch box is mounted above the storage cubby and is behind the FEL joystick. The USB Charger/voltmeter is also mounted in the switch box.

The most challenging part of the project, was the FWD indicator. The LED is mounted in the dash above the headlight control. The arm of the limit switch is bent at a 90 degree angle. The switch is wired in a normally closed configuration. The switch is mounted so the arm is displaced against the FWD control lever. When the control lever is moved down to the FWD position, the arm descends to the closed position, powering on the LED. The LED is very visible even in the southern Alabama sunshine.

https://a.co/d/5iEJzlY Horn

https://a.co/d/9KTKDqs Fuse Block

https://a.co/d/8IgEQlJ Switch Box

https://a.co/d/7TbzTg7 Light Switches

https://a.co/d/4GVNvdE Horn Switch

https://a.co/d/1r7iUxW USB Charger

https://a.co/d/gjpPUb6 Green LED

https://a.co/d/9OKz23Q Lever Arm Momentary Contact Limit Switch

https://a.co/d/fDR2Z28 7-inch Light Bar

https://a.co/d/2jo2h2C 20-inch Light Bar

 

[bmaverick]

I hope the fuse box and the USB ports have a cover or are outdoor weather proof.

There are various fuse box designs out there in the 3D printed sites too.

I like our horn button.

 

[Razzmatazz]

Thanks Bmaverick. The fuse box is mounted under the seat. It is advertised as weather proof. The fuse box has 6 circuits, all individually fused and all only powered when the ignition is in the run position.

The USB/Voltmeter is advertised as weather proof with a rubber seal in place when the ports are not in use.

I think the next project will be mirroring the FWD indicator for the parking brake. The same type switch should work and just use a different color LED.

My wife says I am "pimping" my Yanmar.

 

[Yander]

My Yanmar has a 4wd indicator, yours does too. It's called look down before you take it on the road for fk sake.

It's a tractor.

 

[Razzmatazz]

My Yanmar has a 4wd indicator, yours does too. It's called look down before you take it on the road for fk sake.

It's a tractor.

Thank you for your contribution. Feel free to outfit your tractor as you see fit.