Starting and Charging Systems Caterpillar


Coolant Switch Test Description

Usage:

768C 02X


图 1g01276763

技术参数

该测试测量冷却液开关两端的电压降。 测量测试点 (11) 和测试点 (7) 两端的电压降。 测试点 (11) 为正极触点而测试点 (7) 为负极触点。

电压降将导致冷却液指示灯点亮。 电压降必须大于 1.30 ± 0.15 伏。 灯点亮是了为说明有缺陷。

该故障可能的原因如下:

  • 常开开关

  • 带过高电压降的闭合开关

  • 带焊接触点的开关

其他回路的信息

当发动机冷却液温度达到 38°C(100°F)时,冷却液开关断开。

该开关可阻止暖态发动机中起动辅助的使用。 暖态发动机中起动辅助的使用可能导致可能的损坏。

发动机冷却液必须低于温度 38°C(100°F),以使该测试有效。 必须先将暖态发动机冷却至温度 27°C(80°F),以闭合冷却液开关。

Caterpillar Information System:

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