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我局两台多田野牌汽车起重机（ZL201型的最大起重量为20t、ZL252型的为25t），由于机龄较长，先后出现起吊无力、绞车马达输出轴油封频繁被冲坏的现象。经解体检查，发现柱塞孔严重磨损，最大间隙竟达0．65mm。上述两种机型均采用同一型号的斜盘式轴向柱塞马达（MSF－150型定量
Two TEDA truck cranes (20L for ZL201 model and 25t for ZL252 model) were used by our bureau. Due to the long machine age, there were successively lifting weakness and frequent occurrence of damage to the output shaft oil seal of the winch motor. After disintegration examination, found that the plunger hole severe wear, the maximum gap of up to 0.65mm. Both models use the same type of swash plate type axial piston motor (MSF-150 type quantitative