Z3050 rocker drill hydraulic system headstock gear pump failure and maintenance:
(1) The stuck valve spool will increase the pressure of the hydraulic system, and the excess oil will not overflow back to the tank, thus damaging the oil pump and hydraulic components. The oil pump should be removed and cleaned with kerosene. The valve core should not be damaged, burred or oily. Clean and reassemble.
(2) When the oil pump pressure exceeds the normal pressure, the nylon tube of the hydraulic system will explode. When checking the oil pressure with a pressure gauge, adjust the tension of the spool Spring of the relief valve on the oil pump to reach the normal pressure.
(3) The noise level of the oil pump is related to the assembly quality of the oil pump itself, and also related to the assembly quality of the oil pump and the clutch shaft. The oil pump drive gear shaft and the clutch shaft have different damage to the oil pump, and the noise generated is also large. The reloading should be removed.
(4) The oil pump valve head falls off, the pressure oil flows back from the valve head hole to the oil tank, and the system pressure drops, so that the hydraulic pressure cannot work normally. A valve head should be reworked to tighten the hole in the pump body.
(5) The oil pump oil circuit is blocked by foreign matter, so that the oil pump gear can not rotate normally, so that the oil pump is damaged, and the oil passage is blocked, which will reduce the oil flow. The oil pump should be cleaned and reassembled.
(6) Leakage of the oil pump oil suction hole will increase the pressure of the oil pump oil hole, and the noise is too large to make the hydraulic components work normally. The oil suction hole screws, seals and gaskets should be carefully inspected and retightened.
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