Engine Performance - Test - Engine Speed
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| 所需工具 | ||
|---|---|---|
| 零件号 | 说明 | 数量 |
| 9U-7400 | 多用转速表工具组件 | 1 |
- 将机器停放在水平地面上。
- 关闭发动机。
- 将 9U-7400 多用转速表工具总成 安装在发动机上。
- 起动发动机。
- 将液压油温度提高至 55°± 5°C (131°± 9°F)。
- 读取多用转速表上的发送机转速显示（rpm）。 有关所需发动机操作的发动机转速，请参阅表 2。
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| 项目 | 技术规格 | |||
|---|---|---|---|---|
| 新机 | 翻新 | 维修极限 | ||
| 空载高怠速 (1) | 1880 ± 50 rpm (2) | 1680 到 1930 rpm (2) | ||
| 1980 ± 50 rpm (3) | 1760 到 2010 rpm (3) | |||
| 空载低怠速 | 1000 ± 50 rpm | 1000 ± 100 rpm | ||
| 有负载最大转速 (4) | 1770 ± 50 rpm | 1670 rpm (5) | 1620 rpm (5) | |
| 空载转速 (6) | 1300 ± 50 rpm | 1300 ± 100 rpm | ||
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| ( 1 ) | AEC 开关处于断开位置 |
| ( 2 ) | 发动机转速旋钮置于位置 "10" 后三秒 |
| ( 3 ) | 发动机转速旋钮置于位置 "10" 后三秒内的发动机转速 |
| ( 4 ) | 两台泵的压力均已释放（失速情况）。 |
| ( 5 ) | 最低转速 |
| ( 6 ) | AEC 开关处于接通位置 |
注: 新机技术规范是新机器可预期的性能。 重装技术规范是重新安装系统组件后可预期的性能。 超出维修极限的性能表明了这些问题：不正确的保养或调整, 部件磨损 和 故障。
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