793D Off-Highway Truck Air System and Brakes Caterpillar


Relief Valve (Brake Oil Cooler) - Test and Adjust

Usage:

793D FDB



图 1g01205798

制动器机油冷却器安全阀位于液压油箱内。

(1) 前制动器机油冷却器安全阀

(2) 后制动器机油冷却器安全阀




图 2g01205838

(3) 测试口位于制动器机油冷却器安全阀的举倾控制阀上。

  1. 拆下测试口的螺塞。 在测试口上安装一个 2P-8421 O 形圈适配器 。

  1. 在适配器上安装一个 6V-3965 螺纹接头组件 。 将软管连接到螺纹接头上。

  1. 在软管上安装一个 8T-0854 压力表 (0 至 1000 kPa (0 至 145 psi))。

  1. 将举倾操纵杆移动到保持位置,关闭发动机。

  1. 检查压力表。 最大压力读数应为 790 ± 20 kPa (115 ± 3 psi)。



    图 3g01205812

    制动器机油冷却器安全阀

    (4) 8B-4624 垫片

    (5) 8B-4624 垫片

  1. 根据需要,调整垫片 (5) 的数量以获得正确的安全阀压力设定值。 请勿调整垫片 (4) 。 增加垫片将增加安全阀压力。 拆掉垫片将降低安全阀压力。

    表 1
    调整安全阀压力设定值用的垫片    
    零件号     厚度     压力变化量    
    8B-4624    
    0.81 mm (0.032 in)    

    30 kPa (4 psi)    
    8B-4624    
    0.81 mm (0.032 in)    
    请勿调整。    

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