See Figure 3-4. The oil pump has two gerotor gear sets driven by the crankshaft.
• The feed gerotor set distributes oil to the engine.
• The scavenge gerotor set draws oil from the cam and flywheel compartments and returns it to the oil pan.
Each gerotor gear set has an inner and outer gerotor. The inner and outer gerotors have fixed centers that are slightly offset to one another. Also, the inner gerotor has one less tooth.
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