789C Off-Highway Truck Steering System Caterpillar


Piston Pump (Steering)

Usage:

789C 2BW



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从驱动端可以看到油泵呈逆时针转动。

油泵类型: 变量柱塞泵

台架测试要求:

油 ... SAE 10W
稳定油温 ... 65°C (19°F)
额定发动机转速 ... 1750 转/分
流量 ... 115 ± 12 升/分钟 (30 ± 3 美制加仑/分钟)
输送压力 ... 15000 千帕 (2175 磅/平方英寸)

注: 通过台架测试准确设置压差。

压差设定值 ... 2068 ± 103 千帕 (300 ± 15 磅/平方英寸)

注: 在卡车上安装转向泵时应测量备用压力。

备用压力 ... 2068 至 3619 千帕 (300 至 525 磅/平方英寸)

零流量下的断开压力 ... 20000 ± 350 千帕 (2900.8 ± 50.7 磅/平方英寸)

全速下测试

输出 ... 220 升/分钟 (58 美制加仑/分钟)
测试压力 ... 690 千帕 (100 磅/平方英寸)
油泵测试速度 ... 1838 转/分
发动机测试速度 ... 1750 转/分
输出 ... 209 升/分钟 (55 美制加仑/分钟)
测试压力 ... 6900 千帕 (1000 磅/平方英寸)
油泵测试速度 ... 1838 转/分
发动机测试速度 ... 1750 转/分

半速下测试

输出 ... 110 升/分钟 (29 美制加仑/分钟)
测试压力 ... 690 千帕 (100 磅/平方英寸)
油泵测试速度 ... 919 转/分
发动机测试速度 ... 875 转/分
输出 ... 105 升/分钟 (28 美制加仑/分钟)
测试压力 ... 6900 千帕 (1000 磅/平方英寸)
油泵测试速度 ... 919 转/分
发动机测试速度 ... 875 转/分

(1) 螺塞的扭矩 ... 101.5 ± 4.5 牛米 (75 ± 3 磅英尺)

(2) 3 只螺栓的扭矩 ... 8.5 ± 1.0 牛米 (75 ± 9 磅英寸)

(3) 2 颗螺钉的扭矩 ... 4.0 ± 0.4 牛米 (35 ± 4 磅英寸)

(4) 9T-1699 弹簧

施加测试力时的长度 ... 11.10 毫米 (0.437 英寸)
测试力 ... 32.60 ± 3.11 牛顿 (7.33 ± 0.70 磅)
测试后的自由长度 ... 17.17 毫米 (0.676 英寸)
外径 ... 24.892 毫米 (0.9800 英寸)

(5) 4 只螺栓的扭矩 ... 115 ± 12 牛米 (85 ± 9 磅英尺)

(6) 4 只螺栓的扭矩 ... 34 ± 3 牛米 (25 ± 2 磅英尺)

(7) 压力和流量补偿阀

(8) 2 只螺栓的扭矩 ... 286 ± 29 牛米 (211 ± 21 磅英尺)

(9) 活塞套件

活塞杆的扭矩 ... 79 ± 4 牛米 (58 ± 3 磅英尺)

注: 组装前,先将 9C-3263 螺纹锁固剂 涂抹在活塞杆的螺纹上。

(10) 油泵旋转总成

(11) 2 只螺塞的扭矩 ... 12.85 ± 0.15 牛米 (9.478 ± 0.111 磅英尺)

(12) 103-6282 填隙片组

根据需要,使用填隙片获得正确的轴向间隙。
轴向间隙 ... 0.010 至 0.100 毫米 (0.0004 至 0.0039 英寸)

(13) 活塞套件

活塞杆的扭矩 ... 79 ± 4 牛米 (58 ± 3 磅英尺)

注: 组装前,先将 9C-3263 螺纹锁固剂 涂抹在活塞杆的螺纹上。

(14) 螺塞的扭矩 ... 79 ± 4 牛米 (58 ± 3 磅英尺)

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