Piston and Rings - Three Ring Piston
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| 图 1 | g01038789 |
(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) 安装第二道活塞环时必须使绿色条朝向活塞环开口间隙右侧。 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) 安装油控环和油环弹簧，使各环的开口相隔 180 度。 从油控环开口间隙中必须能够看见油环弹簧的白色部分。 活塞环开口间隙必须与相邻活塞环开口间隙隔 120 ± 20 度。
注: 表 1 为新活塞的技术规范。
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| 活塞和活塞环 | ||||
| 项目 | (1) 顶环 | (2) 第二道环 | (3) 油控环 | |
| 新活塞的槽宽 | 6.185 ± 0.015 mm (0.2435 ± 0.0006 in) |
6.155 ± 0.015 mm (0.24232 ± 0.00059 in) |
8.050 ± 0.010 mm (0.3169 ± 0.0004 in) |
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| 活塞环的宽度 | 5.9825 ± 0.0075 mm (0.2355 ± 0.0003 in) |
5.9825 ± 0.0075 mm (0.2355 ± 0.0003 in) |
7.976 ± 0.011 mm (0.3140 ± 0.0004 in) |
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| 环槽和活塞环之间的间隙 | 0.2025 ± 0.0225 mm (0.0080 ± 0.0009 in) |
0.1725 ± 0.0225 mm (0.0068 ± 0.0009 in) |
0.074 ± 0.021 mm (0.0029 ± 0.0008 in) |
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| 活塞环开口间隙 (1) |
1.15 ± 0.15 mm (0.0453 ± 0.0059 in) |
1.95 ± 0.15 mm (0.0768 ± 0.0059 in) |
1.1 ± 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 ... 120.025 ± 0.010 mm (4.7254 ± 0.0004 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冷态间隙 ... 0.031 ± 0.016 mm (0.0012 ± 0.0006 in)
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