Mini Motor Grader build

[Ambush]

A flange mount has the bolts in the same plane as the shaft.

[Ambush]

Like this.

[DRohacek]

Originally Posted by sawdustdad

That's exactly what I have, a bearing in a two bolt housing that allows for some shaft misalignment. Was thinking about drilling and tapping the boss on the back of the forward axle, then shimming the pillow block bearing as needed. Only down side is I need to disconnect the shaft at the forward hydro to put a new belt on, so that's one more thing to deal with.

I am using a pillow block as well. I wanted to bolt it to the top of the front hydro but the pillow block was a little to tall. I'm using a heavy cast one that is self aligning. I ended up just bolting it to a piece of angle and welding the angle to the frame. I am only planning on using a single belt so I am concerned about that now. Have you sorted out why the belt shred happened? The issue with the rear hydro did you find out why it wasn't driving? (maybe I missed something in the posts)

[DRohacek]

Originally Posted by DRohacek

I am using a pillow block as well. I wanted to bolt it to the top of the front hydro but the pillow block was a little to tall. I'm using a heavy cast one that is self aligning. I ended up just bolting it to a piece of angle and welding the angle to the frame. I am only planning on using a single belt so I am concerned about that now. Have you sorted out why the belt shred happened? The issue with the rear hydro did you find out why it wasn't driving? (maybe I missed something in the posts)

The front rear was already tapped with bolts in it but the pillow block was too tall. I used 6 inch pulleys to have a little more surface area for the belt. Using a B belt as well.

[sawdustdad]

Due to geometry of my engine/rear axle, my lower pulley is directly over the hydro's filter, so my pulley is limited to 3.5 inch dia. With your larger pulleys and a fatter belt, you may be fine. My belt shredded (I think) when the hydro seized momentarily.

[sawdustdad]

Some video of build details posted on youtube

https://youtu.be/DAbLif92Uhs

[Ambush]

Well that is one impressive build! You can always tell when you've done a great job when people comment, " I didn't know they made such a thing" meaning it looks factory built and not home made. Not much you can't tackle after this project!

I'm guessing you have the donor hydro in place, since it's all buttoned up?

[guido]

Totally Awesome!

[DRohacek]

Excellent video Frank. The build is superb! Excellent all the way through!

[Farmall450]

Originally Posted by sawdustdad

Yes, the tires spin freely in opposite directions with little to no resistance. If you roll them both in the same direction, there is some resistance, same as the front axle, indicating that they are coupled to the hydro--which has auto release valves, new a year ago.

When I had the hydro apart, I did not remove the cylinder blocks from the shafts, but they both turned with the shafts as you'd expect. I suppose the spline(s) could be stripped and my spinning the shafts by hand did not reveal that situation. There was no debris or evidence of metal pieces anywhere inside the unit. The pinion out the back of the motor block looks good and is coupled to the motor block shaft.

Yes, removing the rear cover is next.

The rear axle has been working up to this point fine, and was working just a couple weeks ago when I had both axles off the floor to sync them better. Engine running, both axles worked as expected.

It's got to be something simple. Hope it's the filter. Will replace that tomorrow. Also need to check the suction tube to make sure it's not plugged somehow. Should have checked that when I had it apart...

Let us know. That is puzzling.