950M and 962M Wheel Loaders Power Train, Steering, Braking, Hydraulic, and Machine Systems Oil Filter (Power Train) Caterpillar


Oil Filter (Power Train)
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1.1. Filter Location
2.2. Filter Capacity
3.2. Filter Bypass

Filter Location



Illustration 1g03716274
(1) Oil filter (power train)

The power train oil filter (1) is mounted on the right side within the hydraulic service center compartment.

Power train oil acquires wear metals and contaminants from friction materials, loaded gears, and bearings.

Filter Capacity

Filter capacity is a measure of the mass of contaminants that can be trapped by the filter media. Filter capacity is dependent on the media type and the amount of the media.

When filters reach capacity, the filters start to plug. The filtration system is designed with a warning signal to indicate to the operator that the filter is plugged. The warning signal operates by measuring the pressure difference across the filter. If the designated pressure is exceeded, the signal is triggered.

Filter Bypass

When a fluid filter is full of contaminants to the designed capacity, the filter is called plugged and dirty lubricant will bypass the filter. The dirty lubricant will flow through the system without cleaning. If there is a restriction in the oil filter or if the oil viscosity is high, the bypass valve in the filter housing will open. The cracking pressure for the bypass valve is 517 ± 55 kPa (75 ± 8 psi). An alarm is triggered when the filter plugs. Bypass is designed into filter base so that transmission components are not starved of lubricant. Lubricant starvation can cause catastrophic failures of transmission components. The damage done by limited flow of dirty fluids can outweigh the catastrophic failure of lubricant starvation.

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