Transmission Lubrication Oil Pressure - Test
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图 1 | g02420546 |
770G 上的变速箱左侧视图 (1) 润滑安全阀 (2) 变速箱润滑油测压孔 |
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图 2 | g02420622 |
772G 上的变速箱左侧视图 (1) 润滑安全阀 (2) 变速箱润滑油测压孔 |
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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所需工具     | |||
项目     | 零件号     | 说明     | 数量     |
A     | 198-4240 (1)     | 数字压力指示器     | 1     |
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( 1 ) | 同时提供 1U-5481 压力表总成 。 |
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机器突然移动,会造成人员伤亡。 机器突然移动或释放气压或油压,可能对机器上或机器附近的人员造成伤害。 在测试和调整任何空气系统或液压系统之前,为防止可能的伤害,执行测试和调整, "概述"部分的程序。 |
该测试将检查变速箱润滑回路中的机油压力是否正常。
步骤
- 执行以下测试之前,请参考测试和调整, "一般信息"。
- 将工具 (A) 连接到测压口 (2) 上。
- 确保变速箱控制装置处于"停车"位置
- 起动发动机。
- 将变速箱操纵杆移入"空档"位置。 参考图表2 以取得正确的压力。
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表 2 变速箱润滑压力     发动机转速(RPM)     机油压力     700    
20.5 ± 14 kPa (3 ± 2 psi)    2200    
172 ± 34 kPa (25 ± 5 psi)    
- 当本测试完成后,关闭发动机,卸下测试设备。
问题
变速箱充油泵段的压力正确,但变速箱润滑油压力过低。
可能的原因
- 变速箱润滑安全阀开启。
- 变速箱润滑回路泄漏量过大。
问题
正常运行期间机油过热。
可能的原因
- 变速箱外壳中机油过多。 请参考动力传动系测试和调整, "变速箱故障排除"。
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