312D2 and 313D2 Excavators Machine Systems Caterpillar


Specifications

Usage:

312D2 GC BRW



图 1g03255423

卸压阀位置

(A) 主安全阀

(B) 动臂油缸管路(缸盖端)

(C) 动臂油缸管路(连杆端)

(D) 斗杆油缸管路(缸盖端)

(E) 斗杆油缸管路(连杆端)

(F) 铲斗油缸管路(缸盖端)

(G) 铲斗油缸管路(连杆端)

(H) 回转(左)

(J) 向前行驶用左行驶跨接管安全阀(上阀)

(K) 向后行驶用左行驶跨接管安全阀(下阀)

(L) 向前行驶用右行驶跨接管安全阀(上阀)

(M) 向后行驶用右行驶跨接管安全阀(下阀)

(N) 先导安全阀

(P) 先导滤清器

(R) 行驶马达(左)

(S) 回转马达

(T) 回转(右)

(U) 主控制阀

(V) 行驶马达(右)

(W) 驾驶室

(X) 动臂

表 1
312D2 - 313D2    
安全阀     技术规格     锁紧螺母扭矩    
新 (1)
重装 (2)
维修极限 (3)    
(A) 主安全阀     机具    
30500 + 500 - 1000 kPa (4424 + 73 - 145 psi)    

30500 + 500 - 2000 kPa (4424 + 73 - 290 psi)    

29.4 ± 2 N·m (22 ± 1 lb ft)    
行驶
35000 + 500 - 1000 kPa (5076 + 73 - 145 psi)    

35000 + 500 - 2000 kPa (5076 +73 - 290 psi)    
(B) 动臂油缸管路(缸盖端)    
32000 ± 500 kPa (4641 ± 73 psi)    

28300 kPa (4105 psi) (4)    

19.6 ± 2 N·m (14 ± 1 lb ft)    
(C) 动臂油缸管路(连杆端)    
(E) 斗杆油缸管路(连杆端)    
(D) 斗杆油缸管路(缸盖端)    
(H) 铲斗油缸管路(缸盖端)    
31300 ± 500 kPa (4540 ± 73 psi)    
(G) 铲斗油缸管路(连杆端)    
(T) 回转卸压压力(右)    
24500 + 1000 - 1500 kPa (3553 + 145 - 218 psi)    

24500 + 1000 - 2000 kPa (3553 + 145 - 290 psi)    

98 ± 9.8 N·m (70 ± 7 lb ft)    
(H) 回转卸压压力(左)    
(J) 向左行驶跨接安全阀(前进)    
37000 ± 500 kPa (5366 ± 73 psi)    

32800 kPa (4757 psi) (4)    

130 ± 13 N·m (95 ± 10 lb ft)    
(K) 向左行驶跨接安全阀(后退)    
(L) 向右行驶跨接安全阀(前进)    
(M) 向右行驶跨接安全阀(后退)    
(N) 先导安全阀    
4100 ± 200 kPa (595 ± 29 psi)    

49 ± 5 N·m (36 ± 4 lb ft)    
( 1 ) 新机技术规范是新机器可预期的性能。
( 2 ) 重装技术规范是重新安装系统组件后可预期的性能。
( 3 ) 超出使用极限的性能表明了这些问题:不正确的调整, 磨损, 安全阀损坏 和 泵损坏。
( 4 ) 最小

表 2
所需工具    
零件号     说明     数量    
9U-7400     多用转速表工具组件     1    
8T-0470     温度计总成     1    

表 3
安全阀     转一圈调整螺钉的压力变化    
主阀    
4430 kPa (650 psi)    
管路安全阀    
4230 kPa (625 psi)    
回转安全阀    
6000 kPa (875 psi)    
行驶跨接安全阀    
8850 kPa (1275 psi)    
先导安全阀    
620 kPa (90 psi)    
铲刀安全阀    
17640 kPa (2550 psi)    
铲刀管路安全阀    
15680 kPa (2250 psi)    

注: 表 3中的压力值是近似值。 利用压力表进行调整。

注: 进行压力调整需要发动机和泵正常工作。 如果压力调整的结果不正确,则应当检查发动机和泵的特性曲线。 泵的输出流速缓慢表示液压系统中有空气。 确保液压系统中不存在空气。 请参阅测试和调整, "主液压泵空气 - 清除"。

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