3524B Engines for 797 and 797B Off-Highway Trucks Caterpillar


Radiator and Cooling System - Test

Usage:

3524B 1AW

表 1
所需工具  数量 
9S-8140 加压泵 


图 1g00286371
典型压力安全阀系统
(1) 压力安全阀
(2) 加注口盖螺栓

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

蒸汽或热冷却液可能导致严重灼伤。

不要松动热发动机的加注口盖。

拆下加注口盖盖之前,让发动机冷却下来。


使用以下程序来检查冷却系统的压力:

  1. 发动机冷却后,缓慢拧松加注口盖,让冷却系统释放压力。 然后从散热器上取下加注口盖。

  2. 仔细检查加注口盖。 查看密封或被其密封的表面是否损坏。 必须清除盖上所有的异物或沉积物。 必须清除密封上所有的异物或沉积物。 必须清除被密封的表面上所有的异物或沉积物。

  3. 确保冷却液液位高于散热器芯的顶端。

  4. 安装加注口盖。 拧紧加注口盖。


    图 2g00286374
    9S-8140 加压泵
    (3) 分离阀
    (4) 齿座
    (5) 软管

  5. 从适配器 (4) 上拆下软管 (5)。

  6. 拆下散热器顶部水箱的压力测试螺塞。


    图 3g00286375

  7. 将软管 (5) 的一端安装在压力测试螺塞孔内。

  8. 操作加压泵直到压力表的指针不再增加。 压力表的最高示数就是安全阀的开启压力点。 开启压力大约为 124 kPa (18 psi)

  9. 如果安全阀在压力技术规格范围内没有开启,就有必要更换安全阀。

  10. 如果安全阀的开启压力处于技术规格范围内,则检查散热器有无外部渗漏。

  11. 检查冷却系统的所有接头和软管有无外部渗漏。

  12. 如果以下情况存在,散热器和冷却系统没有泄漏。 没有发生外部渗漏。 五分钟后,压力表上的压力读数保持不变。 如果压力表上的读数下降且没有看到外部泄漏,则冷却系统内部有泄漏。 进行必要的修理。

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

    溢出的带压液体可能导致人身伤害。

    如果压力表上显示有压力值,从散热器上拆卸任何软管之前,应先按压放气阀来释放压力。


  13. 从散热器压力测试点取下软管 (5)。

  14. 将螺塞装回压力测试点。

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