C7 Engines for Caterpillar Built Machines Caterpillar


Unit Injector Hydraulic Pump

Usage:

325D L A3R



图 1g01155729

(1) 单体喷油器液压泵

(2) 将机油进口处的接头拧紧至以下值。 ... 40 + 4 N·m (30 + 3 lb ft)

(3) 输油泵

(4) 泵齿轮螺母

使用以下步骤拧紧泵齿轮螺母。

  1. 将螺栓拧紧至 50 ± 5 N·m (37 ± 4 lb ft)。

  1. 将螺母再转动 35.5 ± 2.0 度。

  1. 确认螺母的扭矩是 80 ± 4 N·m (59 ± 3 lb ft)。

(A) 定位销伸出泵壳体前表面的距离值如下。 ... 5.0 ± 0.5 mm (0.20 ± 0.02 in)




图 2g01155730

单体喷油器液压泵和输油泵视图

(5) 将机油出口处的接头拧紧至以下值。 ... 48 ± 5 N·m (35 ± 4 lb ft)

注: 当安装高压机油管路时,将接头螺母拧紧至 40 + 4 N·m (30 + 3 lb ft)。

(6) 将燃油出口处的接头拧紧至以下值。 ... 27 ± 3 N·m (20 ± 2 lb ft)

(7) 使用以下步骤拧紧泵壳体系紧螺栓。

  1. 将螺栓拧紧至 17 ± 2 N·m (13 ± 1 lb ft)。

  1. 再转动螺栓 35 ± 2 度。

  1. 确认螺栓的扭矩是 33 ± 5 N·m (24 ± 4 lb ft)。

(8) 将燃料进口处的接头拧紧至以下值。 ... 27 ± 3 N·m (20 ± 2 lb ft)

泵性能。

额定泵转速 ... 3300 RPM
26 MPa (3770 psi)时的最小流量 ... 30.0 L/min (8 US gpm)
泄压阀的整个旁通压力 ... 38 MPa (5511 psi)
泄压阀的开口压力 ... 31 MPa (4500 psi)

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