TractorRob
Silver Member
I have a grey market Mitsubishi MT3201D tractor that has a 4 speed PTO. I have not been able to find information on what speed the PTO settings were. I could tell when the PTO was somewhat close to 540 just from previous experience driving other tractors, but I wanted to be more accurate. I was trying to think of the easiest way to measure the PTO speed and wondered if I could trick a bicycle computer into displaying the PTO RPM. I knew from setting up bicycle computers before that you calibrate them by telling the computer how far the bicycle travels(in mm) for one revolution of the wheel. I did some calculations and determined that if you set this distance at 2682, then the MPH would be 1/10 the RPM of the wheel. Here is the Bike computer I used:
I installed it on my tractor yesterday and it works great! Now I can tell at a glance exactly how fast my PTO is turning(as an example, the 38.2 mph shown in the picture would be 382 RPM). I also get the added benefit of a clock. I haven't taken any pictures of the installation yet, but if anybody is interested I will post them after I do.
I installed it on my tractor yesterday and it works great! Now I can tell at a glance exactly how fast my PTO is turning(as an example, the 38.2 mph shown in the picture would be 382 RPM). I also get the added benefit of a clock. I haven't taken any pictures of the installation yet, but if anybody is interested I will post them after I do.