TM 5-2410-241-23-1
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IMPLEMENT AND STEERING HYDRAULIC SYSTEM CONTINUED
Oil Filter (Case Drain)
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The case drain oil filter is located within the hydraulic oil tank and removes debris from the hydraulic oil that returns
through the case drain return port (Figure 9, Item 3).
Hydraulic oil flows through filter base (Figure 9, Item 4) and into a cavity (Figure 9, Item 7). The oil fills the space
between the inside of the filter element (Figure 9, Item 1). Oil flows through the filter element (Figure 9, Item 1) and
back to the hydraulic oil tank (Figure 9, Item 2). The filter element (Figure 9, Item 1) stops any debris that is in the
hydraulic oil.
If the filter element (Figure 9, Item 1) becomes full of debris, the restriction to the flow of oil causes a pressure
increase inside the filter element (Figure 9, Item 1). The pressure of the oil causes the filter bypass valve (Figure 9,
Item 5) to move against spring (Figure 9, Item 6). Unfiltered oil is allowed to pass through the bypass valve
(Figure 9, Item 5) and flow directly into the hydraulic oil tank (Figure 9, Item 2). Unfiltered oil can cause damage to
all components in the hydraulic system.
Correct maintenance procedures must be followed in order to ensure that the filter element does not become full of
debris, which will stop the flow of clean oil to the hydraulic tank.
Figure 9. Oil FIlter (Case Drain).
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