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| Illustration 1 | g03653387 |
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(1) Oil flow from pump case drains
(2) Filter | |
The case drain oil filters remove debris from the hydraulic oil.
During normal operation, oil flows through the oil inlet passages to the oil outlet passages of the filters.
Correct maintenance recommendations must be followed in order to ensure that the filters do not become plugged with debris. If a filter is plugged, the flow of filtered oil to the system stops. However, unfiltered oil will flow past the bypass valve which is located inside the filter housing. When the oil does not flow through the filter element, the debris in the oil may damage components in the hydraulic system.
Hydraulic Oil Filter (Oil Cooler Return)
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| Illustration 2 | g03653386 |
The hydraulic oil filter removes debris from the hydraulic oil.
During normal operation, oil flows through the oil inlet passage to the oil outlet passage of the filter.
Correct maintenance recommendations must be followed in order to ensure that the filter does not become plugged with debris. If the filter is plugged, the flow of filtered oil to the system stops. However, unfiltered oil will flow past the bypass valve which is located inside the filter housing. When the oil does not flow through the filter element, the debris in the oil may damage components in the hydraulic system.
The filter bypass switch is monitored by the implement ECM. When the filter element is plugged, oil pressure in the filter housing increases. This pressure causes the filter bypass switch to move to the OPEN position.
The implement ECM will display a Warning Category 2. A Warning Category 2 indicates that the filter has been plugged for more than 30 seconds.
Note: The oil will also bypass the pilot filter element during cold start-up conditions when the oil is below
Hydraulic Oil Filter (Brake, Pilot, CEM Fan 836K Only)
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| Illustration 3 | g03653385 |
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(1) Hydraulic Oil Filter bypass switch (Brake, Pilot, CEM Fan)
(2) Hydraulic Oil Filter (Brake, Pilot, CEM Fan) | |
The hydraulic oil filter removes debris from the hydraulic oil.
During normal operation, oil flows through the oil inlet passage to the oil outlet passage of the filter.
Correct maintenance recommendations must be followed in order to ensure that the filter does not become plugged with debris. If the filter is plugged, the flow of filtered oil to the system stops. However, unfiltered oil will flow past the bypass valve which is located inside the filter housing. When the oil does not flow through the filter element, the debris in the oil may damage components in the hydraulic system.
The filter bypass switch is monitored by the implement ECM. When the filter element is plugged, oil pressure in the filter housing increases. This pressure causes the filter bypass switch to move to the OPEN position.
The implement ECM will display a Warning Category 2. A Warning Category 2 indicates that the filter has been plugged for more than 30 seconds.
Note: The oil will also bypass the pilot filter element during cold start-up conditions when the oil is cold. In this case, the graphical display will not display a warning. As the oil warms up, the bypass valve will move to the CLOSED position. With the bypass closed, oil flows through the pilot filter element unless the pilot filter element is plugged.