789C Off-Highway Truck/Tractor Caterpillar


Gear Pump (Transmission)

Usage:

789C 2BW



图 1g00908875

从传动端看泵时,泵呈顺时针旋转。

油泵类型: 齿轮泵

操作前,请使用机油润滑齿轮泵。

台架测试要求: 开始测试之前,必须将 SAE 10W 油温稳定在 52 ± 3 摄氏度 (125 ± 5 华氏度)。

(A) 变速箱回油段

最小输出 ... 165 升/分 (44 美制加仑/分钟)
测试压力 ... 345 千帕 (50 磅/平方英寸)
油泵的测试速度 ... 900 转/分

(B) 变速箱润滑段

最小输出 ... 119 升/分 (31 美制加仑/分钟)
测试压力 ... 345 千帕 (50 磅/平方英寸)
油泵的测试速度 ... 1800 转/分

(C) 变速箱充油段

最小输出 ... 148 升/分 (39.1 美制加仑/分钟)
测试压力 ... 3100 千帕 (450 磅/平方英寸)
油泵的测试速度 ... 1800 转/分

(1) 新齿轮和新泵体的间隙 ... 0.168 ± 0.043 毫米 (0.0066 ± 0.0017 英寸)

(2) 新齿轮和新泵体的间隙 ... 0.104 ± 0.043 毫米 (0.0041 ± 0.0017 英寸)

(3) 新齿轮和新歧管的间隙 ... 0.081 ± 0.021 毫米 (0.0032 ± 0.0008 英寸)

(4) 新轴以及新泵体的尺寸

传动轴以及从动轴的直径 ... 31.742 ± 0.005 毫米 (1.2497 ± 0.0002 英寸)
泵筒的直径 ... 31.786 ± 0.008 毫米 (1.2514 ± 0.0003 英寸)



图 2g00909129

剖面图 A-A

(D) 轴承的深度 ... 1.575 毫米 (0.062 英寸)

(E) 轴承的连接位置 ... 与中心线呈 30 ± 15 度




图 3g00909131

剖面图 B-B

(F) 定位销的位置 ... 5.0 ± 0.5 毫米 (0.197 ± 0.0197 英寸)




图 4g00909132

剖面图 C-C

(G) 轴承的深度 ... 1.5 ± 0.25 毫米 (0.059 ± 0.0098 英寸)

(E) 轴承的连接位置 ... 与中心线呈 30 ± 15 度




图 5g00909133

剖面图 D-D

(H) 定位销的位置 ... 4.83 毫米 (0.19 英寸)




图 6g00909134

剖面图 E-E

(J) 轴承的深度 ... 1.6 毫米 (0.063 英寸)

(E) 轴承的连接位置 ... 与中心线呈 30 ± 15 度

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