Dynamark Upgrade.

This was my first tractor build from 13 years ago or so. It failed to sell at a yard sale so I got it free. I swapped the pulley, rode the snot out it and had a blast. It sat outside for a few years when I moved out and it got kind of rough. I ended up stripping it down last fall due to it being pretty well worn out. I pulled what you see in the photo out of the scrap pile a few days ago. I'm waiting on stuff for better projects, but I might throw this thing together with some junk just for old times sake.

I had to move the dynamark outside again to make room. I should have known that was going to happen. Added another project to the list.

Fancy stuff.


I think I found most of the major parts. Then I hammered the shifter plate back into shape and welded up a few small cracks. The shift pattern decals were uncovered using a bit of paint remover just for fun.

That was a real sharp tractor back in the day. Are you going to use the original axle? and what motor & tires?

I'm going to throw it together with whatever I can find laying around, so nothing is really set in stone yet. I have the peerless 3 speed transaxle which will do the job. I have a running 11hp flathead that I'll probably slap on there for now.

I managed to loose the bushing that the front axle rides on, it must have fallen out somewhere. Hopefully it'll turn up.

Looks like I might have jumped the gun with this one. I still haven't found that axle pivot bushing despite tearing the barn apart. To top things off I just picked up a sears gt project. I need to shuffle things around and maybe get rid of a few things. Maybe that will thin down the list of projects some.

So a few days after starting this thread a Sears GT18 project basically fell into my lap so this one is shelved for a while.

The old dynamark just got upgraded. I just picked up this Dynamark 18/42. I think it's the biggest dynamark they sold. It has a 4 speed cast iron housing trans with 1" axles and 5 lug hubs. I also got a pressure lubricated opposed 18hp to go on it. Don't expect a ton of updates right now, but hopefully I'll get a little time to work on it.

I can't read the tag but the rear end looks to be a peerless 2300. I got the engine bolt holes drilled out and robbed a few idler pulleys from the donor mower.

that thing should be pretty heavy duty with the 1" axles and oppy pressure lube lots of power being put to the ground

So I mounted the motor up and started trying to plan out the drive belt.

I took a double stack pulley, cut off the offset pto pulley and flipped it over until it sat over the old drive pulley.

The twisted drive belt is new to me, so we'll see how that works out.

I also cut off this deck hanger thing because it was annoying me.

I got some new tires for the front, plus two for the cub. For $6 each for a complete wheel it doesn't hurt to stock up. They aren't anything special, but they should be better than the smooth ribbed tread.

@Customrust wrote:

I got some new tires for the front, plus two for the cub. For $6 each for a complete wheel it doesn't hurt to stock up. They aren't anything special, but they should be better than the smooth ribbed tread.

same setup as on my MTD Ranch King, with the Oppy and 2300. absolutely no shortage of power. I use mine to plow and haul a fully loaded double jet ski trailer around. I'm running a 4" trans pulley and stock engine pulley. That's going to get upsized to 5" or so.

Terrible photo I know, but I got the belt and pulleys run. I'm not sure if they're right, but I think it'll work.

I didn't like the twisted belt setup on my old simplicity. Couldn't get it to work right. Maybe you'll have better luck.

Turns out I installed the clutch idler wrong. I moved it around but it still doesn't stop the belt when clutched. A 1/2 belt might help, but I kind of like the idea of keeping the larger belt.