2008 Yamaha Rhino YXR70FX Factory Service Manual, Page 99Get this manual
CHANGING THE ENGINE OIL CLEANING THE AIR FILTER ELEMENT
13.Check: engine (for engine oil leaks) 14.Check: engine oil level Refer to "CHECKING THE ENGINE OIL LEVEL"
15.Check: engine oil pressure
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aSlightly loosen the oil check bolt 1bStart the engine and keep it idling until engine oil starts to seep from the oil check boltIf no engine oil comes out after one minute, turn the engine off so that it will not seizecCheck the engine oil passages, the oil filter cartridge and the oil pump for damage or leakageRefer to "CRANKSHAFT AND OIL PUMP" in chapter 4dStart the engine after solving the problem(s) and check the engine oil pressure againeTighten the oil check bolt to specificationOil check bolt 10 Nm (1.0 kg, 7.2 ft lb)