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<blockquote data-quote="onyxtour" data-source="post: 5028" data-attributes="member: 740"><p>I'm having a problem with my left side tires moving forward and/or backwards. All hydraulics work, the bucket and arms and the right side moves forward and backwards perfectly; to the point that I can even spin out...or in circles now, since the left side completely stopped moving. This problem began shortly after adding a premium hydraulic fluid that subsequently turned the rest of my fluid a milky white. The first noticeable symptom, no noises, was that the left side tires started jerking...work then stop, work then stop, with the hydraulic charge light coming on when I pushed the control arm forward or pulled it backwards. I changed both hydraulic filters. Cleaned the filter/screen in the canister next to the two hydraulic pumps. I pulled the rear pump (the one for the left side) and after pulling it apart found nothing wrong, other than a couple of cracking o-rings. I replaced the rings, put the pump back together and reinstalled the same. Still, however, the left side does not move forwards or backwards. Note though, when I lifted the left side wheels off the ground, and worked the control arm, both wheels responded immediately. Both forward and in reverse. They may not have matched the rpm of the right side but they would rotate. I guess what I'm saying is that the rotation was weaker than normal and that when I grabbed a wheel while it was rotating I could stop it even though the control arm was pushed all the way forward. In reading several threads I saw mention of a hydrostatic pump, could this be the problem and if so where can I find it on my machine and what does it look like? I also saw that a milky looking hydraulic fluid implies that water is in the fluid and should be changed out. Could this be the problem, and if so why would all my other hydraulic devices be operating so well but not the left side wheels? Should I change out my fluid? I then read that a gage can be used to test the pressure coming out of the rear pump (left side wheels). Should I try this and if so what is this gage called and where can I obtain one? Do you know what the pressure is supposed to be? Or, and I suppose this is the worst case scenario, is the problem my left side drive motor (if that is what it is called)? If it is do you have any information on how to take the motor out and check/test it? Finally, I have found the NH part number for the left side drive motor (632483), if it has to be replaced does anyone know where a good used, if appropriate, motor can be purchased around the NC area?</p></blockquote><p></p>
[QUOTE="onyxtour, post: 5028, member: 740"] I'm having a problem with my left side tires moving forward and/or backwards. All hydraulics work, the bucket and arms and the right side moves forward and backwards perfectly; to the point that I can even spin out...or in circles now, since the left side completely stopped moving. This problem began shortly after adding a premium hydraulic fluid that subsequently turned the rest of my fluid a milky white. The first noticeable symptom, no noises, was that the left side tires started jerking...work then stop, work then stop, with the hydraulic charge light coming on when I pushed the control arm forward or pulled it backwards. I changed both hydraulic filters. Cleaned the filter/screen in the canister next to the two hydraulic pumps. I pulled the rear pump (the one for the left side) and after pulling it apart found nothing wrong, other than a couple of cracking o-rings. I replaced the rings, put the pump back together and reinstalled the same. Still, however, the left side does not move forwards or backwards. Note though, when I lifted the left side wheels off the ground, and worked the control arm, both wheels responded immediately. Both forward and in reverse. They may not have matched the rpm of the right side but they would rotate. I guess what I'm saying is that the rotation was weaker than normal and that when I grabbed a wheel while it was rotating I could stop it even though the control arm was pushed all the way forward. In reading several threads I saw mention of a hydrostatic pump, could this be the problem and if so where can I find it on my machine and what does it look like? I also saw that a milky looking hydraulic fluid implies that water is in the fluid and should be changed out. Could this be the problem, and if so why would all my other hydraulic devices be operating so well but not the left side wheels? Should I change out my fluid? I then read that a gage can be used to test the pressure coming out of the rear pump (left side wheels). Should I try this and if so what is this gage called and where can I obtain one? Do you know what the pressure is supposed to be? Or, and I suppose this is the worst case scenario, is the problem my left side drive motor (if that is what it is called)? If it is do you have any information on how to take the motor out and check/test it? Finally, I have found the NH part number for the left side drive motor (632483), if it has to be replaced does anyone know where a good used, if appropriate, motor can be purchased around the NC area? [/QUOTE]
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