Oil Cooler and Bypass Valve
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| 图 1 | g01214842 |
(1) 油冷却器 (2) 机油冷却器（出口） (3) 机油冷却器旁通阀进口 | |
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| 图 2 | g01214843 |
机油冷却器旁通阀 (4) 机油冷却器出口 (5) 阀 (6) 弹簧 (7) 油箱出口 | |
机油冷却器旁通阀安装在位于液压油箱上的机具回油端口上。 当机具或转向回路启用时，回油流过旁通阀。 阀 (5) 和弹簧 (6) 导致大约 270 kPa (39 psi) 的背压。 背压导致部分回油通过出口 (4) 流向机油冷却器。 大部分回油通过出口 (7) 流向油箱。 旁通阀会快速打开，以缓解回油流量的增加（波动）。 旁通阀使来自机油冷却器的压力保持升高（峰值）。 机油冷却器流出的油液输送至机具泵壳体和转向马达壳体以润滑泵和马达。
Caterpillar Information System:
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2005/12/19 New Piston and Rod Group {1225}
2006/06/26 New Piston and Rod Group {1225}
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D6K Track-Type Tractor Circuit Breakers - Reset
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D6T Track-Type Tractor Transmission Oil - Change
D6T Track-Type Tractor Transmission Oil Filter - Replace
D6T Track-Type Tractor Transmission Oil Level - Check
D6T Track-Type Tractor Transmission Oil Sample - Obtain
D6K Track-Type Tractor Engine Oil Level - Check