WD45 Hydraulic Pump

I've adjusted the hydraulic pump on my 1952 WD45 every way possible using the Screw A, Screw B, Screw D, etc. diagrams and recommendations but I still cannot get
my brush hog where I want it. My hydraulic control lever has my implements too low at the bottom position, but if I don't use a vise grips on the lever quadrant
the lever floats up and so does the implement. Does this mean it's time for a new hydraulic pump?

That's somewhat the nature of the system. They drifted when new. Best bet is a set of limiting chains to keep it from dropping too far, then just run the lever down.
AaronSEIA

(quoted from post at 13:04:05 12/06/22) I've adjusted the hydraulic pump on my 1952 WD45 every way possible using the Screw A, Screw B, Screw D, etc. diagrams and recommendations but I still cannot get
my brush hog where I want it. My hydraulic control lever has my implements too low at the bottom position, but if I don't use a vise grips on the lever quadrant
the lever floats up and so does the implement. Does this mean it's time for a new hydraulic pump?

Click to expand...

No, not hardly. Do you have a WD/WD45 Owners manual ??? Because there is a couple of pages in there telling you how to adjust the hydraulic pumps linkage. If you have this book, there is one sentence incorrectly worded. I can help you with that if you have the book. Those pumps work just fine IF, they are adjusted correctly AND the operator understands how to use them. You have a problem, in the sense that you apparently can't find the "HOLD" position. If you have screw "B" screwed outwards locking the two plates together, if they are in good working order, there is a "CLICK" or detent that secures them when the hydraulic lever is at about the half-way point on the quadrant. If the detent isn't working as intended, I can imagine you would have issues. There is also a spring on the hydraulic lever on the front side of the quadrant to keep pressure on the lever for friction. The throttle has this same spring. If this spring is broken (many are) again your hydraulic lever probably cannot stay in one place. I get a bit ticked off when people say these tractors don't work well in the hydraulic department. That simply isn't true. Raise is raise. Lower is lower. And HOLD is hold and it is capable of doing all three of these things well. If you have an inoperative hold detent or a broken lever friction pressure spring or a leaking hold valve or maladjusted linkage, the system will not work as intended and that's a fact.

This post was edited by DrAllis on 12/06/2022 at 04:02 pm.

thought WD45 did no come out till1953. Wd conversion takes MUCH more than cranksahaft

Crank pistons and carb are really all you need. Air cleaner helps too.
AaronSEIA