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| I have the same problems with an '89 7120. I replaced all the seals in the couplers and that was an improvement but not a fix. So I replaced both cartridges in one circuit. That was a complete fix but one of them was kicking out the next year. And just lately I have to move the lever forward for an instant to relieve the pressure before I pull the lever back otherwise the cylinder will just just move an inch or so. Pressure and volume from the pump is good because the loader works great. I hope somebody can spot the problem. To me it has to be the couplers but what do I do next? | |
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Magnum(7130) hydraulics
