改进后的4135型柴油机油路,见图1。拧下喷油泵上的一个放气螺栓(M 6),装上放油开关(图2),将塑料管接至柴油滤清器回油阀接头处,在接头上钻一φ8毫米孔,焊上φ8×30毫米的铜管,其上接塑料管。改进后的油路中如有空气,可先按压手油泵,待感觉到压力时,旋松放油开关,空气和柴油即可经回油 Improved 4135 diesel engine oil circuit, see Figure 1. Unscrew the bleed bolt (M 6) on the fuel pump, install the drain switch (Figure 2), connect the plastic pipe to the diesel filter return valve connector, drill a φ8 mm hole in the connector, solder On the φ8 × 30 mm copper tube, the plastic tube connected to it. If there is air in the improved oil circuit, press the hand pump first. When the pressure is felt, loosen the oil drain switch, air and diesel oil can be returned to the oil