3408E and 3412E Engines for Caterpillar Built Machines Caterpillar


Piston and Rings

Usage:

769C 01X



图 1g01377415

注: 关于活塞、活塞销和挡圈更多信息,请参阅再使用零件指南。

注: 组装到缸体前,先用清洁发动机机油润滑活塞体组件的周围区域 (A) 和活塞体组件的顶端。

顶部活塞环

1U-6431 活塞环槽量规总成 可用来检查梯形设计活塞的活塞环槽。 请参阅随活塞环槽量规一起提供专门说明书。

(1) 顶部活塞环

安装顶部活塞环,并使带有 "UP-1" 标记的一侧朝向活塞顶部。

顶部活塞环端部存在间隙。 当顶部活塞环安装到内径为 137.16 mm (5.400 in) 的缸套上时,间隙应为以下值。 ... 0.55 ± 0.15 mm (0.022 ± 0.006 in)

缸套内径每增大 0.030 mm (0.0012 in) ,顶部活塞环端部间隙就会产生一个增量。 提高 ... 0.08 mm (0.003 in)

中间活塞环

1U-6431 活塞环槽量规总成 可用来检查梯形设计活塞的活塞环槽。 请参考随活塞环槽量规一起提供专门说明书。

(2) 中间活塞环

安装中间活塞环,并使带有 "UP-2" 标记的一侧朝向活塞顶部。

中间活塞环端部存在间隙。 当活塞环安装到内径为 137.16 mm (5.400 in) 的缸套上时,间隙应为以下值。 ... 1.080 ± 0.190 mm (0.0425 ± 0.0075 in)

缸套内径每增大 0.030 mm (0.0012 in) ,活塞环端部间隙就会产生一个增量。 提高 ... 0.08 mm (0.003 in)

活塞机油控制环

(3) 活塞机油控制环

注: 组装时,活塞机油控制环的弹簧端应与环末端开口成 180 度。

5P-3519 活塞环槽量规总成 可用来检查带直边的活塞环槽。 请参考再使用零件指南以了解有关使用活塞环槽量规的说明。

新活塞上的活塞机油控制环槽宽 ... 3.190 ± 0.010 mm (0.1256 ± 0.0004 in)

新活塞机油控制环的厚度 ... 3.137 ± 0.013 mm (0.1235 ± 0.0005 in)

活塞机油控制环端部存在间隙。 当活塞机油控制环安装到内径为 137.16 mm (5.400 in) 的缸套上时,间隙应为以下值。 ... 0.57 ± 0.19 mm (0.022 ± 0.008 in)

缸套内径每增大 0.030 mm (0.0012 in) ,活塞机油控制环端部间隙就会产生一个增量。 提高 ... 0.08 mm (0.003 in)

活塞销

注: 组装前,用清洁发动机机油润滑活塞销。

(4) 活塞销

活塞中安装活塞销的孔径 ... 50.800 ± 0.005 mm (2.0000 ± 0.0002 in)
新活塞销直径 ... 50.795 ± 0.005 mm (1.9998 ± 0.0002 in)

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