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Can you provide a reference? I'd like to understand the purpose. It will be a learning moment for me.

Welcome to the forum. Your #2 requirement to clean up the bottoms is best done with a crawler machine not a rubber tire machine. Tractors are not meant for that kind of work (especially a tractor with a cab) and you have some big trees there. Some might suggest a track hoe also but my...

A learning moment. There is no "throttle plate" on a diesel engine. Power is controlled by fuel flow

Never heard of this before. When you cut back on the fuel, the engine should return to idle. I wonder if you idle setting is too low? If so, that's easy to correct by turn the idle screw against it's stop to increase the idle speed. The pumpguy, another poster on this forum, may have a better...

What does the operator's manual say?

Any good GL #2 grease should work I use Lucas heavy duty on my snow blower. Remember it's a snow blower not an F-35.

Before you replace the starter, make sure the battery cables and especially the grounds are tight and bright.

"Ran for a good day of work..... " Define work.

Talk to the parts department at your Kubota dealer. They can tell you the prefered location for the block heater. On our M4500, the core plug is removed and an interference fit steel fitting is driven into the block and the block heater screws into that.

Welcome to the forum. How hard have you worked this machine since you got it? When engines sit unused or barely used, condensate can form in the crankcase. Combustion products also contain water vapor. When you bring the engine to operating temperature, water vapor will be seen with any blow by...

Is your coolant level dropping? Are there bubbles in the radiator? How's the compression? It could be as simple as a leaking head gasket or as bad as a cracked head.

"I added fuel right after starting. Took almost five gallons, so while sitting outside in the hot sun I’m guessing most of the diesel fuel must have evaporated?" Did you run it out of fuel? You may have to bleed the fuel delivery system to get it started. Look in your owner's manual for the...

To develop power, the engine needs fuel at the right time, air to oxidize the fuel and compression to ignite the fuel. When is the last time you changed the fuel filter? Do you have a lift pump and is it working? Is your air filter clear? Engines that ran at low load and then quit under high...

You need to get a diesel compression tester and if your compression is less than about 350 psig, you'll need to find out why. Valve adjustment, burned valve(s), bad rings, burned piston crown, blown head gasket, etc

Glow plugs?

So you have fuel with no air bubbles at the injectors, your glow plugs are working, and the new battery really spins the starter and still no start. I'd do a compression check. If you have a compression relief on your engine, make sure that it closes when you crank.

When you have the fuel filter bled, you will have no bubbles coming out of the bleeder screw. You can still clog the head of the filter assembly so check for fuel on the discharge side of the filter. If that checks out, go to the next component. Do you have a lift pump? Do you have flow on the...

You realize that you can damage the engine with the use of starting fluid, don't you? If you do that, you'll spend a lot to get this machine running again. Find the root cause of the problem and fix that. You appear to have fuel to the injectors but you claim the glow plugs are bad. If your glow...

First of all, don't use starting fluid to try to get your engine going. It's a good way to break piston rings and damage the engine. I'm going to assume that you have full fuel flow from the tank to the fuel filter. If you don't, you'll have to make sure you do. t will not start if the tank...

If this were my tractor, I would not run the tractor until I drained the fuel filter of all that crap and corruption. Collect it in a clear container and I'll be willing to bet it's condensed water from sitting around with a partially filled fuel tank. Drain the filter and refill it by opening...