Another NT-254 hydraulic question.

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    • March 10, 2013 at 10:46 am #35820
      Tinbender
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        Correct , or  you're low on fluid.

      • March 10, 2013 at 2:00 pm #35822
        cn8cg
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          Next question is:  Is it much of a job to replace the hydraulic pump?

        • March 10, 2013 at 2:33 pm #35823
          RichWaugh
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            Why replace the pump?  It is sucking air on the intake side, which is probably happening in the sump, not at the pump itself.

          • March 10, 2013 at 4:31 pm #35824
            cn8cg
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              Latest development is that nothing is happening now.  No sucking nor any foaming.  Just nothing.  What else can I do except get a new pump???

            • March 10, 2013 at 5:18 pm #35826
              RichWaugh
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                Have you checked the hydraulic fluid level in the sump?

                The starting point is always to diagnose the issue.  Check the fluid level, also check the level of oil in the engine sump – there are times when a hydraulic pump blows a seal and dumps the hydraulic fluid into the engine sump.  Something to check.

                If you have a FEL, and it is equipped with quick disconnect fittings on the hoses, disconnect the FEL hoses and then reconnect the hoses from the pump to each other.  Also connect the hoses from the FEL to each other to prevent losing fluid.  Absolutely do NOT run the tractor with the hoses disconnected or you will blowup the pump!  Once the FEL is removed from the circuit and the fluid level is correct, try things out again and let us know what the story is then.

                Always look for the least dramatic cause of a problem, don't start by replacing a $350 pump yo may not need.

              • March 11, 2013 at 9:42 am #35833
                cn8cg
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                  My pump is dead.  If it died from the gears disintegrating, can I expect metal in my hydraulic system?  I'm ordering a pump and can anyone tell me if the pump exchange is difficult?  Any cautions?  Must the pump be primed somehow?

                • March 11, 2013 at 10:01 am #35834
                  Tinbender
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                    The gears don't disintegrate. Most likely a seal blew out, that would explain the foam.

                  • March 11, 2013 at 10:10 am #35835
                    cn8cg
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                      Would that be a seal inside the pump?  Hey my friend, I really appreciate you help.

                    • March 11, 2013 at 10:13 am #35836
                      Affordable
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                        The seal is on the end where the shaft comes out of the pump, Let us know if we can help you with the new pump or a rebuild kit for yours

                        The pump has a total of 4- bolts, only 2- of those bolts hold the pump on the tractor the other 2- hold the pump together

                         

                        Tommy

                        Affordable Tractor Sales

                        “Your Jinma Parts Superstore”

                        http://www.affordabletractorsalesco.com

                      • March 13, 2013 at 7:20 pm #35840
                        cn8cg
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                          Thanks Tommy.  Jerry told me it might be a good idea to put hydraulic oil in the inlet pipe so that the pump doesn't run dry or for the least amount of time.  I intend to do this.  I heard a pump can burn up in less than 30 seconds of dry run. 

                        • March 16, 2013 at 10:59 pm #35843
                          cn8cg
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                            My last question on this thread is, could an air leak in the intake line to the pump cause it to fail?

                             

                            Jules

                          • March 18, 2013 at 7:18 am #35858
                            cn8cg
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                              And now someone told me it was probably caused by the wrong hydraulic oil.  I use “General Purpose” hydraulic oil from Tractor Supply.  What is everyone using for hydraulic oil????

                            • March 18, 2013 at 6:10 pm #35866
                              Bob Rooks
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                                 “General Purpose”?? What does that mean?

                                What is the ISO rating?

                                Most everyone uses ISO AW 32 or ISO AW 46 HYDRAULIC OIL.

                                Not machine oil, R&O oil, or ATF. Universal Tractor Fluid (UTF) is not recommended for straight hydraulic systems. nor is Marvel Mystery Oil. vomit

                                But to answer your question; Yes, but it would have to be a leak of such magnitude that other symptoms would prevent operation of the system first. These are very inexpensive pumps, and as such are not very forgiving.

                                Account deleted.

                              • March 25, 2013 at 6:44 pm #35898
                                smokey44
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                                  I had a little air getting into my system near the hydraulic

                                  screen (filter). I pulled the screen out to check it and noticed

                                  the stem was not screwed up tight against the O ring on the

                                  cap. This screen is located under the left side of the seat. If

                                  you follow the suction line from your hydraulic pump to

                                  under the seat, you see the line attached to a cap with 3

                                  bolts on top of your hydraulic tank. Your screen is under

                                  this cap. Anyway, tightening the stem up took care of my

                                  problem. Smokey

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