Re: Working D19, questions
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1. The whole purpose of the of the power director is to provide a live PTO and to be able to shift up and down a gear while moving whether under load or not. So, yes you can shift the power director while under load...that's what it is for. Putting it in neutral in the middle position stops the wheels while letting the PTO run.
2. The traction booster is used with fully mounted or semimounted implements hooked with the snap coupler system (a few late D19's had three point hitch..same deal though). The traction booster system is an automatic weight transfer system that transfers implement weight to the rear wheels of the tractor. If your tractor has the snap coupler hitch, look under the middle of the tractor in front of the bell shaped housing and you'll see a large spring. As the implement pulls harder, this spring stretches. Linkage to the hydraulic pump then tells the pump how hard the pull is. When properly set up, the traction booster system doesn't actually lift the implement but transfers some of the weight. Think of it this way. You can grab on to a 100# weight and pull hard enough to transfer 99# to your feet, but the weight won't come off the ground. This system eliminated the need to have large weights on tractors all the time using up fuel. They got weight for traction when needed. Modern tractors built to this day use a similar system. But again you need to be using mounted implememts and have something that pulls hard like a plow or diec.
3. The electrical system was originally 12v positive ground.
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