Piston and Rings
请参阅可重复利用零件指南, SEBF8049, "活塞"以及可重复利用零件指南, SEBF8051, "活塞销和挡圈"。
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图 1 | g00514913 |
安装到缸体中之前,用干净的发动机机油彻底润滑活塞外表面和活塞环。
(1) 活塞冠组件
(2) 活塞裙
(3) 活塞顶环
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安装顶环,带有 "UP-1" 标记的一侧朝向活塞顶部。
- 如果安装活塞环的缸套孔径为 137.16 mm (5.400 in),则活塞环开口之间的间隙数值如下。 ... 0.55 ± 0.15 mm (0.022 ± 0.006 in)
(4) 中间环
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安装中间环时让有 "UP-2" 标记的一侧朝向活塞顶部。
- 如果安装活塞环的缸套孔径为 137.16 mm (5.400 in),则活塞环开口之间的间隙数值如下。 ... 1.080 ± 0.190 mm (0.0425 ± 0.0075 in)
(5) 控油环
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装配时,控油环的弹簧端应与环两端缝隙成180 度。
- 新活塞上的控油环槽宽 ... 3.210 ± 0.010 mm (0.1264 ± 0.0004 in)
- 新的控油环厚度 ... 3.137 ± 0.013 mm (0.1235 ± 0.0005 in)
- 油环槽与新控油环的间隙 ... 0.073 ± 0.023 mm (0.0029 ± 0.0009 in)
- 油环槽与使用后的控油环的最大允许间隙 ... 0.15 mm (0.006 in)
- 如果安装控油环的缸套孔径为 137.16 mm (5.400 in),则活塞环开口之间的间隙数值如下。 ... 0.572 ± 0.190 mm (0.0225 ± 0.0075 in)
气缸套孔径每增加 0.03 mm (0.001 in),活塞环端部间隙就增加 0.08 mm (0.003 in)。
注: 定位活塞环时,应它们的缺口相互距离约 120 度。
(6) 活塞销孔
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组装前,用干净的发动机机油彻底润滑活塞销。
- 活塞冠轴承中的活塞销孔径 ... 55.047 ± 0.008 mm (2.1672 ± 0.0003 in)
- 活塞裙中的活塞销孔径 ... 55.013 ± 0.004 mm (2.1659 ± 0.0002 in)
- 新活塞销直径 ... 55.000 ± 0.005 mm (2.1654 ± 0.0002 in)
- 活塞销长度 ... 113.20 ± 0.15 mm (4.457 ± 0.006 in)
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