OM
The serial # on by hydraulic unit is 9W8304.

Ed

Hi Ed,
I show 9W8304 as being a single valve 25 gpm unit correct for the D2
The 1J2382 seal is required (same as National #412523 or CR #11223)
The "speedy sleeve" if required is a #SS99112.

The big cover gasket is available from Cat.
The shaft is no longer available.
The bushings are steel that appears to be hardened and seldom wear out but need to be checked when your in there.

Also some units have enough seal cavity to actually stack two seals as the replacements are not as thick as originals. The sleeve is only wide enough for one.

Come back when you get into it and more details are required.

You are a fountain of knowledge.
I'm not much of a mechanic so a couple of questions please.
What is a "speedy shaft".
Is the number you reference for the "speedy shaft" a Cat number.
There is considerable (1/16") movement in the control lever shaft, is that due to the seal failure? Failure of the hardened bushing?

Thanks again,
Ed

Oops.

I am referring to a "speedy sleeve" when speaking of a "speedy shaft" in my earlier post.

Ed

Hi Ed,
The "speedy sleeve" is a CR product (Chicago Rawhide)
It is a thin stainless steel sleeve that is pressed on the shaft and used to repair worn seal areas (grooves and pits) on a shaft. Much cheaper (although they are not cheap) then replacing the shaft and makes a fix that will last forever (almost).

Is the 1/16 shaft movement up and down or horizontal? That is a little excessive in either direction. May be a combination of bushing and horizontal wear if horizontal.

OM
I just checked again, the play is in both directions and the vertical movement is even greater, about 1/8".

Hi Ed,
There is some room for vertical adjustment.....shiming might be required. It is important that the internal lever align with the roller/detent bracket internally.
You will have to get it apart to check bushing and shaft wear.....they never were real tight

Thanks, OM
I have enough information to probably get myself into some trouble.
I'll be back at you if/when I get into the unit.

Ed

This is the first I've heard about a valve with a float position on the 44 hydraulics. I have a D2 with said animal, SN 4W326 which is only 3 positions. How practical/hard would it be to find the 4 position valve with float? I'm trying to push rocks off a pasture and am getting nowhere. I've been thinking I need a rock/root rake to keep the blade off the ground. Any advice?
Jim

You'd have to find a later 4W or 7V unit that has the float valve or an early one that has been upgraded.......I think it would be pretty hard to find. You would have a better chance at finding a complete 6W, 7W, 8W or 9W later unit. (keep in mind you need a 25 gpm unit for the D2. The D4 dozer applications use a 37 gpm pump.)
The float feature is handy when brushing or back dragging the blade otherwise I hardly make use of mine. Seems a root/rock rake would be pretty handy for what you are doing.