Question about 2000 Harley Davidson FLSTC Heritage Softail Classic

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How to assemble oil pump 1995 Heritage - 2000 Harley Davidson FLSTC Heritage Softail Classic

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Assembling an oil pump is not that difficult provided you do a few things to insure that it works correctly. Now, you didn't tell me if the engine was in the frame or out. The difference is that the oil pump drive shaft will already be in the engine and the assembly will be different than if the shaft is out of the engine.

The first thing is that you want to make sure the oil seal is in the pump body and that it's installed in the correct direction. The lip of the seal must face the feed side of the pump. If you look at the gears and the pump body, you'll see that two gears are "thicker" than the other two. Also, the area that these gears go into are the same, one side it deeper than the other in the pump body. The "thin" gears are the feed gears that pump oil into the engine and the "thick" gears are the scavenge gears that pump the oil out of the engine. Once you get the seal installed correctly. You can start putting the gears and drive keys in.

Start by pulling the drive shaft out the back side to the engine as far as possible and installing the inner oil pump gasket. "Stick" the gasket to the engine case with a thin coating of grease. Slide the driven scavenge gear on the shaft with the drive key installed in the keyway of the shaft. The driven gear is the gear with the keyway cut in it. Lubricate the drive shaft and slide the pump body up to the gears making sure you don't go too far and knock the key out of the shaft.

Now put the drive key for the feed side of the pump in the keyway of the shaft and install the feed side driven gear. Make sure the key does not come out of the keyway. Once you get this installed, put the idle feed gear in the pump body. Then install the snap ring on the pump end of the shaft.

Now, carefully slide the pump towards the engine while holding the oil pump drive gear in place in the cam chest. Slide the pump body up to the engine and loosely install the two short bolts in the pump body holding it to the engine. Turn the pump drive shaft and the drive gear so that the keyways are aligned and use a pair of needle nose pliers to insert the key. Then install the snap ring on that end of the shaft.

Then, "stick" the outer oil pump gasket on the outer face of the oil pump body and install the outer cover of the oil pump. Install the four bolts and snug them up to the cover. Now you are ready to tighten the bolts. You should have the pinion gear and oil pump drive gear removed from the pinion gear of the pinion shaft of the flywheel. This will allow you to turn the oil pump while you torque the bolts.

The oil pump bolts torque to 90-110 INCH pounds. Torque the bolts in a criss cross pattern while turning the drive gear in the cam chest with your fingers. If the pump tightens up at any point, you must loosen and reposition the pump slightly and start tightening the pump again. The goal is to get the pump to final torque and still be able to turn the pump freely. Freely is the key word here. Not herky-jerky turning or having to force the gear to turn.

Good Luck

Posted on Nov 10, 2010

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