Question about 2001 Harley Davidson FLHRCI Road King Classic

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Leaking primary - 2001 Harley Davidson FLHRCI Road King Classic

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If the primary is leaking on the backside, you must pull the entire primary drive to gain access to the backside.

Start by draining the primary. Disconnect the battery, remove the outer primary cover, jackshaft for the starter, the engine sprocket nut, remove the circlip and remove the clutch rod adjuster, remove the mainshaft nut to get the clutch off (left-handed threads), primary chain adjuster.

From the right side of the bike, remove the exhaust system to gain access to the starter. Remove the starter.

Go back to the left side and remove the bolts that secure the inner primary to the engine and transmission. Once you have all the bolts out, the primary cover should come off easily. If it doesn't, look for a bolt that you may have missed including on the backside.

Now that you have the inner primary cover off, you can replace the seal on the backside of the cover. Install the seal but before you put the cover back on, you must lubricate the inner lips of the seal where it rides on the mainshaft. Many people don't do this and they destroy the seal in the first five seconds of running. Without lubrication, the mainshaft turns so fast that friction will build up heat and damage the seal within the first few seconds of operation before oil can get to the seal. Lubricate that seal.

Now , Since you've got the inner primary off, there are some seals in the transmission that should be replaced as well. I always replace every seal back there everytime I go into that area. Replace the large final drive gear seal as the thin seal between the mainshaft and the final drive gear. I also replace the Quad Seal behind the spacer behind the belt pulley. This will require the special tools necessary to remove the pulley. If you have those, I'd recommend doing this job as well.

As you can see, this is not a job for the faint of heart. It's a complicated job and a lenthy job. This is why the dealer charges so much to do the job. Now, my experience on doing this job is on the earlier Evo and Shovelhead models but the Twin Cam can't be that much different. I'll help as much as I can via this medium but I must recommend that you purchase a service manual. This medium does have it's limitations.

Good Luck
Steve

Posted on Aug 05, 2010

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2 Answers

I have leak from what seems to be from behind the primary case.


sometimes the mainshaft leaks.. ****** ..or I have seen where shifter exits the ****** behind the primary that seal leaks ,, look under & from above ..anyway youll pull the primary..to fix good luck..check out our info at harleytalking.com....

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Changed starter gear and now have a oil leak on the bottom side off my primary


Hi Robertandshe, try torquing your primary cover bolts to 10 ft lbs.If it still leaks replace primary gasket with Gasket Cinch. Good luck.

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Piamary leaking oil vary bad but its tray oil


I assume that your primary is leaking oil and by "tray oil", I think you mean "Grey oil". Oil in the primary that has been in there for about 5000 miles will be gray. It contains clutch debris and metal shavings from the primary chain and sprockets.

Now, the oil is coming from behind the inner primary cover, the inner will have to be pulled off meaning you'll have to take the engine sprocket, clutch assembly, and starter off. To get the starter off, you'll probably have to pull the exhaust system as well. That's a pretty good job.

But, if the oil is simply leaking out from the seam of the inner and outer primary or the derby cover, simply replace the gaskets there. If your outer primary is designed to use an O-ring on the derby cover, use the O-ring and a solid gasket as well. This works well.

Good Luck
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1 Answer

Oil leaking from the back of primary case


There are several things behind the inner primary case that could be leaking. There is a seal behind the inner primary where the transmission mainshaft goes into the primary. This seal sometimes starts to leak. Also, there are seals in the transmission in that area. The final drive gear seal is the big seal right behind the front final drive belt pulley. Somethimes this pulley wears on the splines of the final drive gear and it loses tension on the "quad seal" on the final drive gearshaft.

You'll nee some special tools to get to this area. You'll need sockets to fit the compensator sprocket nut and the clucth nut. You'll need an airwrench, a primary locking bar, and a torque wrench that will pull 150-165 ft. lbs. torque in forward direction, 68-80 ft. lbs. LEFT-HANDED on the clutch nut, a primary locking bar, a final drive sprocket locking device, a mainshaft nut removal tool, and some seal pullers and installers. Good Luck.

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1 Answer

Severe transmission oil leak on a 04 softail. Leaked out on left side


Two places could be leaking. Primary cover leak on either side. Outside gaskets are not very difficult to replace. There is a oil seal on the backside that requires the removal of the inner primary. This is a difficult job for the amateur hobbist mechanic but it can be done. You'll need a lot of tool including a torque wrench that will torque a left hand threaded nut and one that will torque to 150 foot pounds. You'll also need a primary locking bar.

So, as you can see, if it's anything other than an outer primary cover, inspection cover, or derby cover leak, it's probably best to take it to a shop. If you do this, have them pull and inspect the front belt drive pulley while they're in there. Also, replace the transmission main shaft seal (small one) the final drive gear seal (the big one) and the "quad seal" behind the spacer for the pulley (like an o-ring). And replace the oil seal on the backside of the inner primary cover. Good Luck

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1 Answer

2006 1200 sportstsr leaking oil


If I understand you, the leak is coming from the inspection cover for the primary chain. There should be an O ring on that plate. If the cover is leaking when the bike is off you have way to much oil in the primary. The primary only takes 1 quart of gear lube, I use Mobile 1.

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1 Answer

Have devolped a small leak on 2005 road king. drips from bottom of primary cover at drain bolt. running down from above. back of primary cover has slight oil dampness around transmission and starter shaft...


Spray it off at the car wash to remove all the oil , then spray Right Guard (Yes, that Right Guard) on the area of the leak. It will show up, but you may not be able to see exactly where. There are a couple spots where it can leak. The jackshaft oil seal, as you said, transmission output shaft (clutch shaft) on the trans itself, the inner primary seal where the trans shaft runs thru, the engine sprocket shaft oil seal, inner primary O-ring, the bolts that hold the inner primary to the engine/trans, the primary chaincase gasket and the drain plug. Hopefully when you get it apart, you will see which seal is leaking. If not, replace them all. Still want to fix the leak? LOL

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1 Answer

Oil/Water mixing and leaking


you need to rebuild your engine sounds like you have a gasket leaking or you warped your primary

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2 Answers

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Most inner primary leaks come from the alternator o-ring the best thing to do is put on a new one and put clear silicone on the primary and the engine case.

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