How do I remove my hydraulic pump?

timcote42 · Dec 30, 2007

Success is MINE!!!

Well, gentlemen, I am pleased to say that I pulled the darn thing off. Here's how: fortunately there was enough excess mounting plate (3/8" steel, or thereabouts), to drill 3 half-inch holes around the edge. Through these I passed 1/2" threaded rod and put the far end on the PTO housing. I turned nuts and washers up against the pump mounting plate, then turned them with a wrench. Lo, and the angles sang....one little snap (thank God it wasn't my threaded rod punching through the PTO housing!), then many more turns and she came off. Inside shows the rust encasing I'd expected.

Still need to liberate the pump from the coupling, but that should be a piece of cake by comparison. For now, I will just bask in the glory of this small success....Thanks for all the encouragement!!!

Tim

timcote42 · Dec 30, 2007

Oh, and by the way I live in Silver Spring, MD. Just as soon as I figure out this profile thing, I'll put in more details. Tim

wedge40 · Dec 30, 2007

timcote42 said:
Success is MINE!!!

Well, gentlemen, I am pleased to say that I pulled the darn thing off. Here's how: fortunately there was enough excess mounting plate (3/8" steel, or thereabouts), to drill 3 half-inch holes around the edge. Through these I passed 1/2" threaded rod and put the far end on the PTO housing. I turned nuts and washers up against the pump mounting plate, then turned them with a wrench. Lo, and the angles sang....one little snap (thank God it wasn't my threaded rod punching through the PTO housing!), then many more turns and she came off. Inside shows the rust encasing I'd expected.

Still need to liberate the pump from the coupling, but that should be a piece of cake by comparison. For now, I will just bask in the glory of this small success....Thanks for all the encouragement!!!

Tim

I see this as a lesson for some people.. I always slap a little grease on the pto shaft before I put anything on it. I have to admit the threaded shaft was a nice idea.

Wedge

blueriver · Dec 30, 2007

wedge40 said:
I see this as a lesson for some people.. I always slap a little grease on the pto shaft before I put anything on it. I have to admit the threaded shaft was a nice idea.

Wedge

Yep a little grease goes a long way, I second the 1/2" threaded rod, nice idea.

Glad you got it off Tim, How long you suppose it had been on There?

timcote42 · Dec 30, 2007

I have no idea how long it had been there, but I can PROMISE you I'll grease my PTO before I put anything on it ever again. The tractor's an 82, and the backhoe was origional equit. I just bought it two months agao, so it's been there sometime between 2 months and 26 years. Closer to the latter than the former, I'm sure....

Set screws on the pump side are not drilling out very well, I'm going through loads of drill bits. I think they may be stainless, galling my tips. Perhaps I'll get to use that cutoff disk after all....

Tim

gemini5362 · Dec 30, 2007

Tim
Walmart sells PB blaster. It works a lot better than WD40 for removing rusted parts.

M_Brown · Jan 23, 2008

Timcote42 do you have any pictures of your backhoe and the model #. I'm very interested in getting one someday and it would help to know which one to look for. Thanks

California · Jan 23, 2008

timcote42 said:
Set screws on the pump side are not drilling out very well, I'm going through loads of drill bits. I think they may be stainless, galling my tips. Perhaps I'll get to use that cutoff disk after all....

Try a left handed bit. You might get lucky and when it seizes, it unscrews that set screw.

GCoco · Jan 13, 2019

I used an air hammer with a blunt bit and a slide hammer. Just work the coupling with the air hammer then use the slide hammer. At the beginning the pump came away from the coupling. I put it back on and tightened the set screw really good and didn稚 have another separation. Just keep repeating air hammer then slide hammer. If you have help work both at the same time.