WD45 Lift Arms Stay Up

When quadrant lever is down the lever on side of pump should be down and it should quit pumping. If that's not happening,you got internal problems. It is NOT the unloader valve causing that.

Time to pull pump and polish spool valves. New check valve springs, orings, gaskets, and cleaning.       MACK

Thanks everyone for the suggestions.

As I was dreading I'm just going to pull the pump and tear it down. That way I'll know for sure what the issue is. It almost looks like the hydraulic lines were screwed into the pump before they installed it. That could be difficult.

Next question is does someone make a rebuild kit for these pumps? Or do you just clean it up and match up O-rings to work with it? Springs might be a challenge to find if they are broken.

The screw I'm referring to is screw "A".  If you don't check this out first, you could be removing the pump for no reason. Screw "A" must have the tip screwed into the dimple or pocket on the side of the pump to shut the pump OFF.

The only part of the pump you can remove in chassis is the hold valve on top. Two bolts. The rest has to be disassembled on a bench with a vise.

If you are not far from me, and you would like I could take a look at it. Can't say that would prove much. I grew up on a '53 WD, and sold it in '65.

Thanks all.

DrAllis - I took your advice. I think there is some progress.

Tractor not started. Lift arms were in the up position, pressure on them. I bled the pump to push the arms back down.

Started the tractor and screwed in the "D" screw as you said. I keep working the screw in and out until I finally got it all the way in. Arms still up while moving the quadrant lever up and down to see if it would do anything. I drove the tractor around for about a half our as I normally do just to run the tractor. Arms still staying up and cannot be pushed down.

The next day the arms were down. Overnight the pressure went away.

The current situation is the arms will raise very, very slowly when putting the quad lever up in lift mode. If I step on the lift arms while its trying to raise it too much weight and the arms do not lift. If I let it raise all the way with no load it will eventually go all the way up and stay up. And when I move the quad lever down the arms go down. So I think something in the pump is now freed up. The guy I bought the tractor from had it in the family for over 30 years. The last few years he drove it once a year just to run it. I dont think he moved the quad lever to use the lift so it needs a good workout.

Next thing I'm going to do is go through the linkage setup in the manual again on pages 30-31 to make sure that is all correct. At least now the arms can be dropped using the quad lever as it supposed to. Maybe this will cure itself with more use.

I'll keep you posted.

Thanks