CAT 586C


My favorite constructions vehicles are feller bunchers. The wheeled ones. So I am naturally inclined to make them. I built a small one; I built a large one. I wanted to build a medium one, but I figured I should get out of the box. At least this time.

The full gallery may be seen here, and instructions may be found here.

CAT 586C

The CAT 586C is a site prep tractor. Forgive me for simplifying the work done by the engineers, but the tractor is basically a 573C with a new implement for site preparation, rather than felling. As always, I stared with scaling the full tractor from CAT’s website, and finding a size that would work well with tires, features, and aesthetics. Then I started building.

CAT 586C Rear

I started with the chassis, to get a sense of the size and the layout. I had a good idea of all the features I would want, and I knew some planning would be required. I then finished the mulcher (implement), which is basically a rotating drum with lots of teeth on it. I used a bunch of 24 tooth gears, and connected them to a rotating driveshaft. The chassis was built with four wheel drive, and was connected to the mulcher driveshaft through a series of gears to increase the speed of the drum.

CAT 586C Underside

Then on to the back of the tractor. Feller bunchers and site prep tractors all have their engines in the back; pretty normal for large tractors with large front implements. But to get the weight as far back as possible, the engine is mounted transversely. This presented a couple of challenges for me. I mounted a I-3 engine on the left in the rear with simple gearbox geared up to connect it to the drivetrain. Just in front of the motor are the two cooling fans, which are also driven by the drivetrain. These are also geared up. For those of you keeping score at home, the drivetrain gears up three separate functions, so rolling the MOC on the floor causes a nice whizzing sound.

CAT 586C Driveline

I added some additional features that mirror the real tractor. First, over the mulcher there is a guide bar that allows the tractor to push trees and shrubs down toward the mulcher. In my MOC this is accomplished by a simple worm gear mechanism. Second, I added a small winch on the rear to get the tractor out of sticky situations. Finally, a small mulching door was installed to allow for more or less entry to the mulcher, again just like the real tractor.

CAT 586C Mulcher

The tractor worked well. Functions were smooth, and required no maintenance during play. The many controls on the front were a little dense, and this caused some finger congestion. The number of rotational features connected to the drivetrain made rolling on the floor a little strained. Thought, this kept the MOC from rolling off the table into a lot of pieces. Everything worked well enough, so maybe it is time to make another feller in this scale. Not today, I still have a lot of other projects to complete first.

Happy Building.

Advertisements

Thirdwiggville


About a year ago, Mr., Mrs., and Jr. Thirdwigg packed up some boxes and left Chicago for Grand Rapids. Along with many other changes, this relocation provided myself a room devoted to LEGO; well at least until it will be commandeered (shared?) as a family play room.

LEGO Room

It is not too fancy, but it works well. The room is in the attic of the house without heating or cooling; the summers get a little hot, but the winters are fine. I have two little tables on which I do my building, and four organizing shelves that keep many of the high use parts close at hand. Tires, books, and empty bricklink packages are strewn about, at least until I can muster up the gumption to put them away.

LEGO Table

Organization is always a work in progress, and as you can see, some things need to be put away. Careful eyes can see some projects from The Queue that are getting close to completion.

LEGO Shelf

The room has some nice build in shelves on both sides of the room. As you can see, I keep a lot of infrequently used parts in bags off to the sides, and some of the larger Wheels and Tires. I also keep an large box on the floor for when small children want to come over and play in Uncle Thirdwigg’s LEGO room.

Happy building. More MOCs will be finished soon.