3003, 3013, 3014 and 3024 Engines for Caterpillar Built Machines Caterpillar


Fuel System Pressure - Test

Usage:

CB-214D 1TZ

------ WARNING! ------

渗漏或溅溢到热表面或电气部件上的燃油会引起失火。 为防止可能的伤害,当更换燃油滤清器或油水分离器滤芯时,要将起动开关断开。 应立即将溅溢的燃油清除干净。



注意

使用适当的容器来盛接可能溅出的燃油。 立即清理所有溅溢的燃油。



注意

不要让脏物进入燃油系统。 彻底清洁将要拆开的燃油系统部件的周围区域。 在拆开的燃油系统部件上安放适当的盖。


燃油输油泵位于发动机右侧。

压力测试测量输油泵的输出压力。



图 1g00730216
输油泵
(A) 进油口
(B) 出油口
(1) 输油泵
(2) O 形密封圈


图 2g00293196
1U-5470 发动机压力表总成

请参阅专门说明书, SEHS8907, "使用 1U-5470发动机压力表总成"。

  1. 断开输油泵的出口管 (B)。 加注燃油系统,以消除输油泵中的空气。 请参阅系统操作、测试和调整模块, "燃油系统 - 注油"主题,了解正确步骤。 将 1U-5470 发动机压力表总成连接到输油泵的出口。

  2. 断开燃油切断电磁阀连接的电线。 将燃油切断阀的操纵杆置于关闭位置。

  3. 盘车 10 秒。 记录最大压力。 压力表上的压力读数应在下列范围内:

    最高压力 ... 42 to 70 kPa (6 to 10 psi)

    最小压力 ... 31 kPa (4.5 psi)

  4. 如果压力小于最低压力或者高于最高压力,必须修理或更换输油泵。

  5. 观察盘车过程中记录的最高压力降低一半需要的时间。 如果时间少于 30 秒,必须更换或修理输油泵。

  6. 从输油泵上拆下压力表。 将出口管连接到输油泵上。 拧松喷油嘴上供油管的螺母。 操作燃油滤清器底座上的注油按钮 (3),直到不含空气的燃油流出接头。 拧紧喷油嘴上的螺母。 请参阅技术规格, "喷油管路",了解正确的扭矩。

  7. 连接燃油切断电磁阀的导线。

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