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YJ280系列液力变矩器是针对目前国内ZL15～ZL20轮式装载机配套用的液力变矩器性能指标偏低，结构可靠性差而研制开发的更新换代产品。国内采用液力传动的ZL15～ZL20型轮式装载机，其动力传动参数主要有如下三种（见表1）。从表1可见，ZL15～ZL20轮式装载机在动力传输系统的配套
YJ280 series torque converter is designed for the domestic ZL15 ~ ZL20 wheel loader supporting the torque converter with low performance indicators, poor reliability and research and development of the upgrading of products. Domestic use of hydraulic transmission ZL15 ~ ZL20 wheel loaders, the power transmission parameters are mainly the following three (see Table 1). Can be seen from Table 1, ZL15 ~ ZL20 wheel loader in the power transmission system