345D MHPU and 349D MHPU Mobile Hydraulic Power Units Machine System Caterpillar


Pilot Valve (Boom Drift Reduction)

Usage:

349D L DKN



图 1g01595497

(1) 12 个螺塞组件的扭矩 ... 16 ± 1.5 N·m (140 ± 13 lb in)

(2) 在要密封的电磁阀和减压阀总成的 4 个 O 形密封圈上稍涂润滑剂。

(3) 安全阀总成的扭矩 ... 82 ± 7 N·m (60 ± 5 lb ft)

(4) 3 个螺塞组件的扭矩 ... 70 至 77 N·m (50 至 55 lb ft)

(5) 螺塞组件的扭矩 ... 34 至 37 N·m (25 至 27 lb ft)

(6) 两条螺栓的扭矩 ... 7 ± 1 N·m (60 ± 9 lb in)

(7) 2 只螺塞组件的扭矩 ... 35.0 到 38.5 N·m (26 到 28 lb ft)

(8) 6 只螺栓的扭矩 ... 55 ± 10 N·m (41 ± 7 lb ft)

(9) 4 只螺栓的扭矩 ... 100 ± 20 N·m (75 ± 15 lb ft)

(10) 两只螺塞的扭矩 ... 60 至 66 N·m (44 至 49 lb ft)




图 2g01595496

剖面 A-A

(11) 螺母的扭矩 ... 4.0 ± 0.5 N·m (35 ± 4 lb in)

(12) 螺塞的扭矩 ... 48 ± 5 N·m (35 ± 4 lb ft)

(13) 在要密封的 O 形密封圈上稍涂润滑剂。

(14) 底座的扭矩 ... 2.25 ± 0.25 N·m (20 ± 2 lb in)




图 3g01595495

剖面 B-B

(15) 必要时,使用下面的垫片:

310-0143 垫片
数量 ... 2
1 个垫片的厚度 ... 0.25 mm (0.010 in)
310-0142 垫片
数量 ... 1
垫片厚度 ... 0.5 mm (0.02 in)
310-0141 垫片
数量 ... 1
垫片厚度 ... 1.0 mm (0.04 in)

(16) 螺塞的扭矩 ... 345 ± 30 N·m (250 ± 22 lb ft)

(17) 在要密封的备用环上稍涂润滑剂。

(18) 在要密封的 O 形密封圈上稍涂润滑剂。

(19) 297-0350 弹簧

在试验力下的长度 ... 47.000 mm (1.8504 in)
试验力 ... 40.195 ± 2.010 N (9.0 ± 0.5 lb)
试验后的自由长度 ... 53.300 mm (2.0984 in)
外径 ... 18.000 mm (0.7087 in)

(20) 310-0140 弹簧

在试验力下的长度 ... 67.0 mm (2.64 in)
试验力 ... 557.8 ± 27.9 N (125.4 ± 6.3 lb)
试验后的自由长度 ... 75.3 mm (2.96 in)
外径 ... 36.0 mm (1.42 in)



图 4g01595494

剖面 C-C

(21) 297-0354 弹簧

在试验力下的长度 ... 80.500 mm (3.1693 in)
试验力 ... 27.222 ± 1.361 N (6.1 ± 0.3 lb)
试验后的自由长度 ... 105.500 mm (4.1535 in)
外径 ... 22.000 mm (0.8661 in)

(22) 在要密封的 O 形密封圈上稍涂润滑剂。

(23) 在要密封的备用环上稍涂润滑剂。

Caterpillar Information System:

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