Air Filter - Replace
滤清器的更换周期为90天。 如果环境使然，应更频繁地更换滤清器。 以下所列为应环境要求更换滤清器的指导原则：
- 有过多的灰尘积聚
- 滤清器因阻塞气流而挠曲变形。
- 系统温度不断升高。
Caterpillar Information System:
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