Piston and Rings - Four Ring Piston
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| 图 1 | g00520356 |
(1) 安装顶环时必须使黄色条朝向活塞环开口间隙右侧。 安装顶环时必须使 "UP-1" 朝上。 活塞环开口间隙必须与相邻活塞环开口间隙隔 120 ± 20 度。
(2) 中间环的绿色条必须安装在活塞环开口间隙的右边。 安装中间环时必须使 "UP-2" 朝上。 活塞环开口间隙必须与相邻活塞环开口间隙隔 120 ± 20 度。
(3) 第三环的红色条必须安装在活塞环开口间隙的右边。 安装时，使 "UP-3" 朝上。 活塞环开口间隙必须与相邻活塞环开口间隙隔 120 ± 20 度。
(4) 安装时，机油控制环和活塞环扩张器隔 180 度。 必须能够从机油控制环的间隙处看见活塞环扩张器的白色部分。
注: 表 1 为新活塞的技术规范。
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| 活塞和活塞环 | ||||
| (1) 顶环 | (2) 中间环 | (3) 第三环 | (4) 机油控制环 | |
| 新活塞的槽宽 | 5.160 ± 0.010 mm (0.2031 ± 0.0004 inch) |
5.160 ± 0.010 mm (0.2031 ± 0.0004 inch) |
5.050 ± 0.010 mm (0.1988 ± 0.0004 inch) |
8.050 ± 0.010 mm (0.3169 ± 0.0004 in) |
| 活塞环的宽度 | 4.9825 ± 0.0075 mm (0.1962 ± 0.0003 inch) |
4.9825 ± 0.0075 mm (0.1962 ± 0.0003 inch) |
4.915 ± 0.025 mm (0.1935 ± 0.0010 inch) |
7.925 ± 0.011 mm (0.3120 ± 0.0004 in) |
| 环槽和活塞环之间的间隙 | 0.1775 ± 0.0175 mm (0.0070 ± 0.0007 inch) |
0.1775 ± 0.0175 mm (0.0070 ± 0.0007 inch) |
0.135 ± 0.035 mm (0.0053 ± 0.0014 inch) |
0.125 ± 0.021 mm (0.0049 ± 0.0008 in) |
| 活塞环开口间隙 (1) |
1.05 ± 0.15 mm (0.0413 ± 0.0059 inch) |
1.40 ± 0.10 mm (0.0551 ± 0.0039 inch) |
1.35 ± 0.15 mm (0.0531 ± 0.0059 inch) |
1.10 ± 0.20 mm (0.043 ± 0.008 in) |
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| ( 1 ) | 给出的值适用于安装在孔 280 mm (11.024 in) 中的活塞环。 |
活塞销孔 ... 120.028 ± 0.008 mm (4.7255 ± 0.0003 in)
活塞销直径 ... 119.994 ± 0.006 mm (4.7242 ± 0.0002 in)
活塞销和活塞孔之间的间隙 ... 0.034 ± 0.014 mm (0.0013 ± 0.0006 in)
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