WD45 hyd pump ?

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   The lift arms on my WD45 lift and lower fine without a load on them, but with my 3 bottom SC plow it will barely lift the plow off the ground, I mean the bottoms are still skimming the ground. The pump is set the way it says in the plow manual and on the battery box decal, and it is full of oil. It used to lift this plow easily but I haven't had it on the tractor for a few years.
We tried lifting the plow with the forklift and the tractor tries to hold it up but the plow slowly falls to the position not quite on the ground. If you move the lever down the plow drops and when you put it back up it tries to lift  but it barely moves it.

I have a pump off of a WD that was working fine should I change the pump from the 45 or is there something else I should try first?

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Dave in il Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 22 Sep 2009 Location: Manville Il Points: 1748	Post Options Post Reply Quote Dave in il Report Post Thanks(0) Quote Reply Topic: WD45 hyd pump ? Posted: 16 Sep 2011 at 11:52pm
	The lift arms on my WD45 lift and lower fine without a load on them, but with my 3 bottom SC plow it will barely lift the plow off the ground, I mean the bottoms are still skimming the ground. The pump is set the way it says in the plow manual and on the battery box decal, and it is full of oil. It used to lift this plow easily but I haven't had it on the tractor for a few years. We tried lifting the plow with the forklift and the tractor tries to hold it up but the plow slowly falls to the position not quite on the ground. If you move the lever down the plow drops and when you put it back up it tries to lift but it barely moves it. I have a pump off of a WD that was working fine should I change the pump from the 45 or is there something else I should try first?

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MACK Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 17 Nov 2009 Points: 7664	Post Options Post Reply Quote MACK Report Post Thanks(0) Quote Reply Posted: 17 Sep 2011 at 7:53am
	Sounds like it needs some shims in unloading valve. While it is apart put new orings and check ball springs in. Put a 5000lb gauge in remote cuppler and check pressure. MACK