Repair gear pump, the assembly must pay attention to the following matters: ①. Deburring method to remove the burr of each part, the gear sharp edge with cream stone down dull, but can not be turned into a fillet, the flat grinding parts to be demagnetized, all Parts must be cleaned carefully with kerosene before assembly; ②.CB-B type gear pump axial intermittent direct control by the gear and pump body thickness generally thicker than the teeth 0.02-0.03mm, generally not in the pump body and before and after Between the cover plus paper pad, resulting in an intermittent axial too large, volumetric efficiency is reduced. Intermittent too small and easy to heat, mechanical efficiency; ③.CB-B gear pump front cover mounted on the long axis of the oil seal, the outer end face Should be flush with the flange, can not penetrate too deep, so as not to block the leak channel, resulting in trapped oil, leading to leakage at the seal; ④.CB-B-type gear pump two locating pin hole, hydraulic parts factory as a general processing technology used. Gear pump in the maintenance of assembly, if the pump body before and after the three parts into the positioning pins, and then tighten the six compression screws, often appear fixed gear problem.The correct way is to first diagonally cross-tighten the six A compression screw, hand rotating the long axis, if not the severity, rotation After living, with the hinge pin hole, into the positioning pin; ⑤ .CB-B-type gear pump easy to install the anti, you must pay special attention, or not to suck the oil, easy to seal overedged; ⑥. Needle roller bearings Needle diameter tolerance can not exceed 0.003mm, the length tolerance of 0.1mm, needle roller to be filled with the bearing race; (7) gear pump assembly, according to JB / JQ20104-88 and JB / JQ20102-88 gear pump Test method〗 project to test.
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