793D Off-Highway Truck Hydraulic Fan System Caterpillar


Piston Pump (Hydraulic Fan)

Usage:

793D FDB



图 1g01208085

从泵的驱动端看,泵的转向为逆时针。

油泵类型 ... 可变排量活塞泵

压力切断 ... 32500 kPa (4714 psi)

泵排量 ... 190 cc (12 cu in)

(1) 215-6758 压力和流量补偿阀

注: 更多信息,请参阅"压力和流量补偿阀"。




图 2g01524151

剖面 A-A

(2) 两个锁紧螺母的扭矩 ... 170 N·m (125 lb ft)

(3) 4 只螺栓的扭矩 ... 215 N·m (159 lb ft)

(4) 256-3680 泵旋转总成

(5) 256-5000 泵盖总成




图 3g01524154

B-B 视图

剖面 C-C

截面 D-D

(6) 两只螺塞的扭矩 ... 198 N·m (146 lb ft)

(7) 四只螺塞的扭矩 ... 10 N·m (7 lb ft)

(8) 螺塞的扭矩 ... 25 N·m (18 lb ft)

(9) 4 只螺栓的扭矩 ... 620 N·m (457 lb ft)




图 4g01208113

256-3680 泵旋转总成 (4) 的视图

(10) 179-6916 弹簧

长度 ... 11.17 mm (0.440 in)
外径 ... 5.80 mm (0.228 in)

(11) 179-6914 垫片

(12) 179-6915 垫片

(13) 4 只螺栓的扭矩 ... 9 ± 2 N·m (6 ± 1 lb ft)

注: 安装前将 9S-3263 螺纹固定剂 涂抹在螺栓 (13) 螺纹上。

注: 使用垫片 (11) 和 (12) 以获得 146.10 - 0.25 mm (5.75 ± 0.010 in) 的尺寸 (E) 。




图 5g01190892

(14) 组装之前,先将 9S-3263 螺纹锁固胶 涂抹在螺纹上。

(15) 螺塞的扭矩 ... 5 N·m (44 lb in)

(16) 节流孔的扭矩 ... 3 N·m (26 lb in)

(17) 螺塞扭矩 ... 3 N·m (26 lb in)

(18) 螺塞的扭矩 ... 5 N·m (44 lb in)

压力与流量补偿阀




图 6g01207946

(19) 216-1397 排量电磁阀

(20) 117-7496 高压切断阀

(21) 117-7522 弹簧

自由长度 ... 16.75 mm (0.660 in)
外径 ... 2.6 mm (0.102 in)

(22) 216-0793 流量补偿阀

(23) 170-9822 弹簧

自由长度 ... 12.20 mm (0.480 in)
外径 ... 1.90 mm (0.075 in)

(24) 170-9821 弹簧

自由长度 ... 47 mm (1.850 in)
外径 ... 1.50 mm (0.059 in)

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