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东方红-75拖拉机和东方红-60/70T推土机均采用CB46齿轮油泵。东方红-802/802K拖拉机和东方红-802KT推土机采用CBN-E450或CBT1-E550型齿轮油泵,该油泵流量大、可靠性好。其液压系统冬季用HC-8或HC-11号机油,夏季用HC-14号机油。液压油泵应和所匹配的分配器一起使用。由于拖拉机是在相对稳定负荷工况下工作,采用FP_175A型分配器,安全阀开启压力为12.74+0.5兆帕。而推土机是在变负荷工况下工作,采用FP_175B型分配器,安全阀开启压力
Dongfanghong -75 tractors and Dongfanghong -60 / 70T bulldozers are used CB46 gear pump. Dongfanghong -802 / 802K tractors and Dongfanghong -802KT bulldozers using CBN-E450 or CBT1-E550 gear pump, the flow of the pump, and good reliability. Its hydraulic system uses HC-8 or HC-11 oil in winter and HC-14 oil in summer. The hydraulic pump should be used with the assigned distributor. As the tractor is working under a relatively steady load condition, the FP_175A distributor is used and the relief valve opening pressure is 12.74 + 0.5 MPa. The bulldozer is working under variable load conditions, the use of FP_175B-type distributor, safety valve opening pressure