Question about 1979 Harley Davidson XLH 1000 Sportster

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Oil pump removal oil pressure - 1979 Harley Davidson XLH 1000 Sportster

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I need to know what year model Sportster you're working on. I know the book says you can change the oil pump without removal of the engine from the frame but it ain't that easy. Let me know exactly what year model you're working on. You may NOT have to pull the pump.

Are you certain you have no oil pressure? Pull the spark plugs and remove the oil filter. Spin the engine with the starter and see if oil pumps out of the oil pump adaptor. If it does, you have oil pressure and the oil pressure switch is lying to you. If your bike is equipped with an Evolution engine, 1986 or later, it will have hydraulic tappets. If you indeed do not have any oil pressure, the tappest will rattle badly.

Good Luck
Steve

Posted on Oct 24, 2010

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Fig. 16 Oil Pump & Housing 42162079

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Fig. 18 Oil Pump Outer Gear Diameter Clearance Inspection 42162081

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Fig. 19 Oil Pump Gear End Clearance Inspection 42162082

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The lubrication system is a full flow filtration system pressure feed type. Oil from the oil pan is pumped by an internal gear type oil pump directly coupled to the crankshaft. Its pressure is regulated by a relief valve located in the timing chain case cover. The oil is pumped through an oil filter and feeds a main oil gallery. This oil gallery feeds oil under pressure to the main and rod bearings and the camshaft bearings. Passages in the cylinder block feed oil to the hydraulic lifters and rocker shaft brackets which feeds the rocker arm pivots.
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  3. Raise and safely support the vehicle.
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  2. Install the pump cover and tighten the fasteners to 9 ft. lbs. (12 Nm).
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