Relief Valve (Brake Oil Cooler) - Test and Adjust
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所需工具 | ||
---|---|---|
零件号 | 说明 | 所需数量 |
198-4240 | 数字压力指示器 | 1 |
2J-5608 | 盖 | 1 |
4J-0527 | O 形密封圈 | 1 |
注: 在您进行任何压力测试之前,确保滤清器和滤网清洁。 在您进行本测试之前,确保油处于工作温度。
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图 1 | g00634123 |
(1) 举倾泵上的测压口 |
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图 2 | g01016391 |
(2) 管组件
(3) "制动器油冷却器安全阀" |
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图 3 | g00532762 |
"制动器油冷却器安全阀" (3) 的剖视图 (3) "制动器油冷却器安全阀" (4) 垫片 |
- 将 198-4240 数字压力指示器连接至测压口 (1).
- 将管组件 (2) 从"举倾机构控制阀"上拆下。
- 安装 2J-5608 盖,并在管组件 (2) 和"举倾机构控制阀"之间安装 4J-0527 O 形密封圈。
- 利用长螺栓安装管组件 (2)。
- 将"举倾机构操纵杆"移动到保持位置,并起动发动机。
注: 在低怠速下执行本测试
- 观察压力表。 压力读数应为
586 ± 14 kPa (85 ± 2 psi) 。注: 压力读数是以
38 L/min (10 US gpm) 流速对安全阀进行测试台测试的结果。 低怠速下的泵流速为167 L/min (44 US gpm) 。 结果压力可能比提高的值还高。 - 停止发动机。
- 拆下测试设备并在"举倾机构控制阀"内安装原来的螺栓。
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调节安全阀压力设定值的垫片 | ||
零件号 | 厚度 | 压力变化量 |
8B-4624 | |
|
问题:压力低于
可能的原因
- "制动器油冷却器安全阀" (3) 卡滞在打开位置。
- "制动器油冷却器安全阀" (3) 设定过低。 加装垫片 (4)。 参考表 2。
问题:压力高于
可能的原因
- "制动器油冷却器安全阀" (3) 设定过高。 卸下垫片 (4)。 参考表 2。
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