3126E and 3126B Commercial and Truck Engines Caterpillar


Belt - Inspect

Usage:

3126B 1AJ

检验

皮带张紧度应该在发动机运行的最初20至40小时之间作首次检查。

检查皮带张紧力。 关于正确的保养周期,请参阅操作和保养手册, "保养周期表"专题(保养部分)。

检查皮带张紧度时,应在两个皮带轮中间的地方施加 110 N (25 lb ft)的力。 经正确调整的皮带将会下垂 9 mm (0.35 inch)15 mm (0.59 inch)

为使发动机性能最大化,检查传动皮带是否磨损和断裂。 更换损坏或磨损的皮带。

对于需要多根传动皮带的应用,要更换相配的整组传动皮带。 只更换一组中的一条皮带,由于旧皮带已被拉伸,会使新皮带承受更多的负载。 额外负荷就会加到新皮带上,从而造成皮带断裂。

如果皮带过松,振动会引起皮带和皮带轮不必要的磨损。 松弛的皮带可能打滑而引起过热。

如果皮带太紧的话,就会在皮带轮和皮带上施加了不必要的应力。 这样就可能缩短部件的使用寿命。

拆下传动皮带护罩。 检查交流发电机和附属驱动皮带(如有配备)的状况和调整情况。

如果皮带不需要更换或调整,则安装皮带罩。 如果皮带需要调整或更换的话,应进行下述程序以便调整皮带张紧度。

  • 如果发动机配备了氟利昂压缩机(空调)的话,风扇驱动、交流发电机和附件的皮带将会装有一个自动皮带张紧装置。

  • 如果发动机没有配备氟利昂压缩机的话,则使用交流发电机来调整皮带张紧度。

调整

交流发电机皮带



图 1g01075759
(1) 调整螺栓
(2) 安装螺栓

  1. 稍微松动安装螺栓 (2)和调整螺栓 (1)。

  2. 移动皮带轮以调整皮带张紧度。

  3. 拧紧调整螺栓 (1)和安装螺栓 (2)。 关于正确的拧紧扭矩,请参阅规格手册, SENR3130, "扭矩规格"。

  4. 安装皮带护罩。

如果安装了新皮带的话,应在发动机在额定转速运转30分钟之后再次检查皮带张紧度。

水泵皮带



图 2g01075753
水泵皮带驱动总成的分解图。
(1) 安装螺栓
(2) 方孔
(3) 调整螺栓

  1. 稍微松动安装螺栓 (1)和调整螺栓 (3).

  2. 使用插入方孔 (2)内的方形驱动头来调整皮带张紧度。

  3. 拧紧调整螺栓 (3)和安装螺栓 (1)。 关于正确的拧紧扭矩,请参阅规格手册, SENR3130, "扭矩规格"。

  4. 安装皮带护罩。

如果安装了新皮带的话,应在发动机在额定转速运转30分钟之后再次检查皮带张紧度.

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