C15 and C18 Engines for Caterpillar Built Machines Caterpillar


Piston and Rings

Usage:

745 3F6
请参阅再使用和修补指南, SEBF8049, "活塞的目视检查"和再使用和修补指南, SEBF8051, "活塞销的检查和测量步骤"。


图 1g01516394

活塞和连杆

(1) 活塞冠组件

(5) 活塞裙

安装到缸体中之前,用干净的发动机机油彻底润滑整个活塞外表面和活塞环。

顶活塞环(2)

安装活塞环,并且标有 "UP-1" 字样的一侧朝向活塞顶部。 蓝色条纹和黄色条纹必须在活塞环端隙的右边。

新顶活塞环的厚度 ... 3.83 mm (0.151 in)

137.16 mm (5.400 in) 的缸套孔中的活塞环的两端之间的间隙 ... 0.35 ± 0.05 mm (0.014 ± 0.002 in)

缸套孔每增加 0.03 mm (0.001 in) 活塞环两端之间间隙增加的量 ... 0.08 mm (0.003 in)

中间活塞环(3)

安装活塞环,并且标有 "UP-2" 字样的一侧朝向活塞顶部。 紫色条纹必须在活塞环端隙的右边。

新活塞上的活塞中间环槽宽 ... 3.070 ± 0.010 mm (0.1209 ± 0.0004 in)

新中间活塞环的厚度 ... 3.005 ± 0.015 mm (0.1183 ± 0.0006 in)

137.16 mm (5.400 in) 的缸套孔中的活塞环的两端之间的间隙 ... 0.70 ± 0.10 mm (0.028± 0.004 in)

缸套孔每增加 0.03 mm (0.001 in) 活塞环两端之间间隙增加的量 ... 0.08 mm (0.003 in)

控油环(4)

组装时,活塞环的弹簧端应与活塞环端隙隔 180 度。 蓝色条纹可以位于活塞环端隙的右边或左边。

新活塞上的活塞控油环槽宽 ... 4.03 ± 0.01 mm (0.159 ± 0.001 in)

新活塞控油环的厚度 ... 3.98 ± 0.01 mm (0.157 ± 0.001 in)

油环槽与新活塞控油环的间隙 ... 0.05 ± 0.02 mm (0.002 ± 0.001 in)

137.16 mm (5.400 in) 的缸套孔中的活塞环的两端之间的间隙 ... 0.45 ± 0.15 mm (0.018 ± 0.006 in)

缸套孔每增加 0.03 mm (0.001 in) 活塞环两端之间间隙增加的量 ... 0.08 mm (0.003 in)

注: 安装好所有活塞环后,旋转活塞环,使开口间隙分隔 120 度。

活塞销(6)

新活塞销直径 ... 59.975 ± 0.005 mm (2.3612 ± 0.0002 in)

活塞销长度 ... 89.80 ± 0.15 mm (3.535 ± 0.006 in)

活塞体中的活塞销孔径 ... 60.0925 ± 0.0075 mm (2.36580 ± 0.00030 in)

注: 组装前,用清洁发动机机油彻底润滑活塞销。

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