BOOM GP 3631008 - Caterpillar

Illustration 1 g01779735
Rear axle housing (1) Inlet line (2) Pressure sensor (3) Filter bypass switch (4) Rear axle power train filter (5) Level switch for the rear axle (6) Outlet line
Illustration 2 g01779801
Section view of the rear axle power train filter (7) Bypass valve (8) Spring (9) Inlet passage (10) Outlet passage (11) Housing (12) ElementRear axle power train filter (4) is mounted to the back of the rear axle housing. Oil from the rear axle oil pump flows through inlet line (1) to rear axle power train filter (4). Oil then flows through outlet line (6) to final drive bypass manifold.Filter bypass switch (3) and level switch (5) for the rear axle send input signal to the panel for the Advisor. Pressure sensor (2) also sends an input signal to the Advisor.Oil from inlet line (1) flows into inlet passage (9). This oil fills the space that is between element (12) and the inside of housing (11). During normal operation, the oil flows through element (12). The oil then flows through outlet passage (10). Element (12) stops any debris that is in the oil.If the filter element becomes full of debris, the restriction to the flow of oil causes a pressure increase inside the filter. If the pressure of the oil achieves the bypass pressure, the pressure oil causes bypass valve (7) to move against the force of spring (8). The oil then goes through open bypass valve (7). This oil flows through the bypass passage and to the final drive bypass manifold. Filter bypass switch (3) notifies the VIMS of this occurrence. When the oil does not go through the filter element, the debris that is in the oil may cause damage to the other components in the system.Correct maintenance must be used to ensure that element (12) does not become full of debris and that the flow of clean oil is not stopped.