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| Illustration 1 | g00510256 |
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(1) Parking brake release hydraulic filter
(2) Bypass switch | |
Parking brake release hydraulic filter (1) is fastened to the left side of the main frame behind the front wheel.
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| Illustration 2 | g00331996 |
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Components of parking brake release hydraulic filter (4) Bypass valve (5) Spring (6) Outlet passage (7) Base (8) Inlet passage (9) Element (10) Housing | |
Oil from the hydraulic tank flows to the torque converter and parking brake release gear pump. The parking brake release section of the pump sends oil to parking brake release hydraulic filter (1).
Oil flows through inlet passage (8). The oil fills the space between the inside of housing (10) and element (9). During normal operation, the oil flows through element (9) and out outlet passage (6) to the remainder of the hydraulic system. Element (9) stops any debris that is in the oil.
If filter element (9) becomes full of debris, the restriction to the flow of oil causes a pressure increase inside the filter. The pressure oil causes bypass valve (4) to move against the force of spring (5). Also, the bypass switch (2) will be activated and an alarm will be registered in the cab.
The oil then flows past the open bypass valve and to the remainder of the hydraulic system. When the oil does not flow through the filter element, the debris in the oil will cause damage to other components in the hydraulic system.
Use correct maintenance in order to make sure that element (9) does not become full of debris. If element (9) is full of debris, the flow of clean oil to the hydraulic system is stopped.