Problem with new 2072
 

I got some time to tinker with the new to me 2072 today.It came to me with no drive shaft and some stuff banged up as I said in another post it did not seem too serious. I got together the parts to replace the shaft and some hydro linkage and got it all hooked up.Well engine started and seems good that was a load off my mind but the hydro does not seem to build pressure.I ran it at a good speed and worked the shifter with the wheels off the ground but no movement.So far checked the fluid made sure it was full ,changed the filter with a new Cub one and all I get is the power steering seems to work but very hard and sluggish.Any ideas before I pull this rear out and switch it with the spare I have?

Thanks , Bob

If the shaft was out when you bought it, makes me wonder if someone installed the charge pump upside down? If it is that could be the problem, but steering shouldn't work either.?? Does the lift do anything?

Thanks for the reply,I get nothing from the lift and nothing as far as movement forward or reverse .The steering does work but not right,very hard and sluggish not like I know it should.Can the charge pump be flipped with out removing the rear from the tractor?

Bob

Yes, you just need to remove the driveshaft. There are some posts on here somewhere that tell you which way it goes. I can't seem to find them or remember which way it goes. Does it steer any easier at all with the engine running? It will steer(very stiff) with out the engine running for a while just from the fluid in the lines.

Maybe there is water in the system and it froze up.Is your garage heated?

Before disturbing the charge pump, take a really close look at it and try to see if the dirt/dust/rust on it has been disturbed or taken apart. If you see no "wrench marks" on the bolts, then it could be something else unless the wrenching on the charge pump was done a long time ago.

With the tunnel cover off, is the pump turning at engine speed? Does it have a driveline disconnect clutch?

Good point Frank, I should have said that ! :beer2:

Ok ,I just went and looked at it again then at a diagram on Parts Tree .The charge pump does look very clean on the outside like it may have been out.So it looks like just two bolts on the front into the case ,do I just remove it and turn it 180 ?I think it's worth a try I do have a spare super pump also that is not in a tractor but the splines on the input shaft are not great would it better to just change it out and how do you know it it's upside down.Sorry for all the questions I just have never had one apart they are so tough even the most rat faced ones seem to work just fine with new fluid and filters .Oh and Lew ,I do have heat so not thinking it is frozen but thanks for the heads up .I added a pic I think I am looking at the right thing .

Bob

It does look cleaner. I bet the PO put a seal in it and put it on 180 out. And, yes take the 2 bolt out and spin it 180. There is a little tab on one side of the pump you can look at and tell if it is on correctly. I just can't remember which side it is on tho. If no one else chimes in tonight, I will pull my tunnel cover for you in the morning and look. :beerchug:

Shrewcub,thanks for the offer to check yours for me I did some more searching on here found a post by Sam Mac. His post shows a flat spot on the charge pump cover that must be turned one way and I just looked mine is wrong.I hope to get a chance to work on it some more tomorrow and will report in .Once again thanks to all for the help and advice .
Bob

Thanks for searching, Bob!:beerchug: Glad to be of help!! And ya, I nailed that one!!!:biggrin2:

Ok,good news bad news I took out the drive shaft again popped off the cover on the charge pump and flipped it.Good news the rear wheels now spin and seem to work as they should but it's still jacked up with the wheels off the ground.Bad news is I still seem to have no power steering and the lift does not work either.Could it still be air bound? any ideas I only had about an hour to mess with it tonight and hope to have more time tomorrow.Thanks for the help so far and I hope to get it all working .It's hard to work on something you have no idea what has been messed with before.

Bob

Bob, it could be air. How long did you let it run?

If the drive is working, the pump is not air locked. Air in the steering and lift system will self purge when you use it. How much have you worked the hydraulic lever and tried to steer it? Did you change the fluid and filter?

Another thing to check is line routing. Seen more than once someone hooked up the lines incorrectly.

I admit I did not run it very long so could be just needs more time.I have replaced the filter with one from Cub Cadet and new fluid .When you said J-Mech about the lines being run wrong it rang a bell.I myself switched two on an 1872 and caused the same symptoms.Thanks again all and I will check everything carefully tomorrow.

Bob

Your charge pump is 180 off, flat side goes to the right side of the tractor. You owe me. :beerchug:

Jon you have to buy the beer for missing that one.

Sam Mac,I just flipped the charge pump and that gained me the drive at the wheels but so far no power steering and no lift.It was Shrewcub called it first then I searched the subject and found the post by you with that same pic.Everyone was a big help so far and I will get back to it tomorrow and hope to get it all up and running.

Bob

At least one of those beers is mine! :beerchug: :biggrin2:

Lift and PS should work now. I'm thinking maybe a bad pressure relief valve or some of the lines may be crossed up front. Lines at the pump look correct. You may need to get a set of gauges and do some trouble shooting per the manual.

I really hope it is a crossed line someplace like I wrote in an earlier post I have done it myself but right at the pump but hose are right.I don't own pressure gauges good excuse to buy more tools.I do have 2 or three pumps and could switch out a relief valve .I have zero experience inside the hydro unit so I have been studying the parts diagram.

Bob

I wouldn't worry too much about the "guts" of the pump..... they almost never fail. Weak charge pump is about as bad as you can expect.

I didn't miss it Sam, Travis had already pointed it out. :beerchug:

I was just busting you. :biggrin2:

Had the same problem with our 2072. I had good pressure at the pump but had no power steering or lift. After much hair tearing out and a bunch of cleaning on the bottom of the steering shaft to read the connections I found that the input line from the pump (output at the pump) was connected to the out connection on the steering box and the out line was connected to the in connector. We switched the two lines and everything worked as it was supposed to.

Well I checked the lines running to the front and everything was good but still no power steering or lift .I got looking closer at the hydro and not just the charge pump but the whole unit looked like maybe someone was into it.I had the parts 2072 sitting there and just said ok stop messing around and I swapped it out.I now have a running driving 2072 with power steering and the lift now works fine.At some point I may open that one up and see what was done but for now I'm just happy everything is working.Thanks again to all who took the time to help out.

Bob

Glad you got it going Bob! Parts tractors are nice. It usually takes me longer to convince myself to do something, than it does to JUST DO IT! :beerchug:

Great news. Glad you got it fixed. :beerchug:

I have one more question ,I have a complete Super hydro pump assembly with a worn input shaft.Would it be tough to swap out just the shaft that way I would have a spare complete rear.I have looked at the parts diagram but thought maybe someone that has done it could chime in.

Thanks , Bob

Pump needs to be dissembled. I guess it depends on what you consider tough. Take a look at the manual and you'll see what's involved.