966M XE and 972M XE Wheel Loaders Power Train, Steering, Braking, Hydraulic, and Machine Systems Caterpillar

Illustration 1	g03693562
Location of components Right side view of machine (1) Bypass manifold (2) Oil filter - transmission kidney loop (3) Oil filter - hydraulic oil (4) Oil filter - transmission full flow (5) Bypass switch

The power train oil filters (2) and (4) are mounted on the right side of the machine frame under the platform.

The externally mounted oil filters have bypass valves. If there is a restriction in the oil filter or if the oil viscosity is high, the bypass valve will open. The full flow filter bypass is located in bypass manifold (1) with the oil cooler bypass.

If the inlet pressure to the oil filter is 345 ± 21 kPa (50 ± 3 psi) greater than the outlet pressure, the bypass valve will open. When the oil does not flow through the filter element, the debris in the oil could damage other components in the hydraulic system.

Correct maintenance recommendations must be followed in order to ensure that the element does not fill with debris. If the element is full of debris, the flow of clean oil to the hydraulic system stops.

Both filters are equipped with a filter bypass switch (5) that send a signal to the Power Train ECM. The Power Train ECM then sends that information to the message display. The message display shows a warning when the transmission oil filter needs to be serviced.