Grader Build Planning

[ironman]

You need something like this, kinda pricey though....
https://www.colemanracing.com/Steeri...Drive-Gear-Box

[Ambush]

I should clarify and probably add some confusion at the same time

When I said " pump rotation is from looking at the input end" I should have said for standard applications. In the case of these hydros, the shaft protruding from the "back" is actually the input for normal pumps.

So even though your "input" turns CCW (left hand) the lens plate inside is CW (right hand). If you want to change direction, you will need a CCW plate.

There are several videos online that will give you a very good idea of what is involved in a teardown and hardware inside, but each one contains a few things that are definitely not the correct procedure. But still very helpful from an understanding point of view.

Just google sundstrand U15 repair video


You could consider turning your engine and driving to the rear pump shaft. Looking AT the flywheel, it is turning CW. Placing the engine with the flywheel to the rear over the rear shaft of the hydro should give you the correct pump rotation.

It's early morning here and I'm only done half of my first coffee, so verify that.

[KMCub]

Originally Posted by ironman

You need something like this, kinda pricey though....
https://www.colemanracing.com/Steeri...Drive-Gear-Box

The price of that doesn't scare me away and conceptually that is what I need the only problem with that specific one is it would never handle continuous power, it is just made to reverse a steering shaft.

[KMCub]

Originally Posted by Ambush

I should clarify and probably add some confusion at the same time

When I said " pump rotation is from looking at the input end" I should have said for standard applications. In the case of these hydros, the shaft protruding from the "back" is actually the input for normal pumps.

So even though your "input" turns CCW (left hand) the lens plate inside is CW (right hand). If you want to change direction, you will need a CCW plate.

There are several videos online that will give you a very good idea of what is involved in a teardown and hardware inside, but each one contains a few things that are definitely not the correct procedure. But still very helpful from an understanding point of view.

Just google sundstrand U15 repair video


You could consider turning your engine and driving to the rear pump shaft. Looking AT the flywheel, it is turning CW. Placing the engine with the flywheel to the rear over the rear shaft of the hydro should give you the correct pump rotation.

It's early morning here and I'm only done half of my first coffee, so verify that.

I appreciate the info. I would simply rotate the engine if it would work with the sheet metal. I am using a 1250 with side panels and wanted to keep it all intact for asthetics, cool is expensive...

[Ambush]

Looking forward to seeing your build progress. Keep us updated.

Always interesting to watch innovation. Good luck!