Serious wear and tear of hydraulic pump with oil pan, will make it high, low pressure chamber was breakdown. Light heat, power consumption, so that the aging seal, the oil temperature rise, shorten the life of the machine; severe cases will lead to the hydraulic system can not work. A very simple emergency repair method, although not using a dedicated high-precision surface grinder, but the repair effect is very satisfactory. Specific methods are as follows: 1 required material 80 mesh, 180 mesh alumina valve grinding sand each box, 120 #, 200 # of coarse, fine water emery cloth 10, about 2kg oil, a circular plane permanent magnet (available 100 watts A speaker of the speaker speaker), a steel plate (200mm × 200mm × 10mm), a flat glass (400mm × 400mm × 5mm), cleaning gasoline about 10kg, and brush, oil basin and so on. 2 operating methods (1) rough grinding. Select the 120 # coarse water sand cloth on the flat glass and add a little oil and 80 mesh grinding sand, and then with the flat oil pan flat on the ground water cloth. Flat grinding method is: grinding while turning, the track was "8" shape. The degree of flat grinding is basically to eliminate its large and deep grooves. (2) Fine grinding. In the same way as above, use a # 120 fine water emery cloth to ground the pan with the oil pan until it completely eliminates all of its grooves. (3) Grinding. With a permanent magnet will be equipped with oil pan sucked, then the permanent magnet sucked flat steel plate (at this time, with oil pan equivalent to a positioning platform, both to play the role of dynamic oil pan positioning, but also to move , With a fixed oil pan grinding, grinding and the requirements of the lax), 180 mesh grinding sand and oil mix thoroughly coated with oil pan, gently put on the oil pan (with the oil pan suction, to Careless), the hand can not be under pressure, full use of the suction force of the magnet with the match. Hand or edge grinding turn, the track was "8" shape. When the grinding to move, with no oil on the surface of the plate, and then coated with oil in the oil pan, and with the same method of grinding about 20min, the grinding work is completed. Finally, with a demagnetizer with remanent oil pan can be back. (4) test. Wash the oil pan with gasoline, apply a layer of butter on the flat glass, place the oil pan on a flat surface coated with butter (the butter prevents the oil from leaking between the oil pan and the glass plate) Gasoline into the oil pan with high and low pressure distribution hole to see with the oil pan and the high pressure chamber and the low pressure chamber whether the oil leakage, if there is no significant oil leakage, that is, meet the accuracy requirements.
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