Finding Top Center Position for No. 1 Piston
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| 图 1 | g00569371 |
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正时齿轮 (A) 喷油泵油泵驱动齿轮 (B) 惰轮 (C) 凸轮轴齿轮 (D) 曲轴齿轮 | |
- 发动机正时齿轮的每个齿轮上均具有参考标记。 当这些标记对准后，1 号缸位于上止点位置。
注: 此发动机不通过销钉正时，而是采用具有奇数轮齿的惰轮。 如果拆下了喷油泵，不要转动发动机。 前壳体拆下后，必须利用正时标记对准齿轮。 用画笔标记轮齿。 通过啮合带有对应标记的轮齿重新安装喷油泵。
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图 2 g01412325 喷油泵正时标记
(1) 正时标记
(2) 正时标记 - 喷油泵上的正时记号 (1) 和 (2) 指示泵与正时齿轮的相对位置。 标尺上的每个标记表示正时改变六度。
- 转动曲轴，直到 1 号活塞位于压缩冲程上的大约 60 度 BTC 为止。
注: 在 1 号气缸位于上止点位置的情况下检查气门间隙。 这样可确保气缸位于压缩冲程，而并非位于排气冲程上。
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图 3 g00565561 曲轴皮带轮正时标记 - 曲轴皮带轮有一个标尺，范围是 0 至 40 度。 标尺上的每个刻度代表 5 度的曲轴转角。
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