Question about 2006 Harley Davidson FLSTCI Heritage Softail Classic

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Replace a harley main drive seal

How to replace the main shaft quad seal and spacer that goes with this.

Posted by Anonymous on

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Hi Anonymous, for more information about your question please visit the websites below. Good luck and have nice day.
Harley Davidson Manuals Mark Workshop
HD Ultra Classic Primary Removal and Installation

Posted on Jun 25, 2015

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Posted on Jan 02, 2017

wd4ity
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SOURCE: when replacing the quad seal and main shaft seal

Yes, there is a small seal that goes inbetween the mainshaft and the final drive gear. If I were doing this job, I'd also replace the seal on the backside of the inner primary as well.

To replace the small final drive gear seal, you will need a special tool to remove the inner race of the primary bearing from the main shaft. Of course, I've seen lots of times when this seal was not replaced while in there with no consequences.

Also, check the splines on the inside of the front belt pulley. These are bad about wearing. I have seen therm wear to the point that they strip out and no longer drive the motorcycles. If allowed to wear too much, they'll start a wear on the final drive gear as well. You do not want that to happen as it will require the replacement of the final drive gear to repair this damage. High Dollars. Good Luck

Posted on Mar 03, 2010

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Fisher and Paykel GW712AU.I replaced the main shaft seal and bearings.Now the shaft with the wash bowl attached slides down through the seal,top bearing, spacer and lower bearing causing the motor to


Hi I just read your post.
It sounds like you have got the shaft upside down.
Large nut for the shaft goes on at bottom bearing & put your seal in last.Make sure you put enough grease on the lip of the seal.

Feb 07, 2013 | Fisher and Paykel GWL11 Top Load Washer

1 Answer

Does the quad seal go over the sprocket shaft spacer and sit inside the lips of the main seal


Hi Anonymous, call, take a ride or trailer your bike over to your local dealers service/parts department, I'm sure they will be happy to take your Harley Davidson for a test ride if necessary/possible and offer professional advice and assistance concerning your issue. Good luck have a nice day.

Jun 18, 2012 | Harley Davidson Motorcycles

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....

Aug 16, 2011 | 2000 Harley Davidson FLSTC Heritage...

1 Answer

Do 2007 touring models have inner primary seal leaks


Any machine that has oil in any gear case is subject to have oil leaks. The '07 touring models are no exception. There are several seals in that area and the possibility of a leak always exists but if you're asking if the 07 models are more suseptable to the leaks, the answer is no. In the early 1990's, they did have a problem with the front belt pulley wearing and getting loose. Then, the "quad seal" behind the pulley spacer would allow transmisison oil to seep out in the transmission final drive gear splines.

Good Luck
Steve

Aug 09, 2011 | Harley Davidson FLHRS - FLHRSI Road King...

1 Answer

Inner primary seal keeps leaking replaced three times all other seals replaced to rode another 1200 kms leaking out inner primary seal still which brand off equitment do you reccommend to use or why is it...


There are several places that could be leaking in this area. First let's talk about the seal that goes in the backside of the inner primary. I always use the James double lipped seal in this area. When you install the seal, put some sealant on the outside circumference of the seal. It must be installed to just below the surface of the primary and it must be straight. Before putting the inner primary back on, lubricate the inner bore of the seal as well as the surface the seal is going to seal against. If the engine starts up and seal has no lubrication on it, the friction will burn the delicate sealing lips and they will be damaged. Your leak could also be the large seal in the face of the transmission behind the front belt pulley. Everything I just said about the inner primary seal applies to this seal as well. The last thing is the pulley could be worn in the spline area in the center of the pulley. You didn't say what year model your bike was but over time, these splines wear and the pulley becomes loose. When this happens, the tension on the "quad seal" behind the spacer on the transmission main shaft fails. Transmission lubricant seeps down between the mainshaft and the spacer and out of the splined area of the front belt pulley. Take the lock plate off the front pulley and check to see if the large nut is tight. If it isn't tight, this could be the problem. The large nut has LEFT HANDED THREADS. Retorque the nut to 150 Foot Pounds. You'll need a special socket and sprocket locking tool to do this job. Take the pulley off and check the splines and replace the quad seal. Make sure you check all the areas whenever you have the inner primary off.

Jul 17, 2011 | Harley Davidson FXDL Dyna Low Rider...

1 Answer

Hello, I have a 2006 Night Train with an open primary and im getting a oil leak from the seal on the main output shaft. I have replaced it twice and I have replaced the same direction as the factory one...


The lip of the oil seal on the engine sprocket shaft faces towards the inside of the engine, metal side out. The lip always goes against the direction of oil flow. You should not be having to replace this seal that often. If something is wrong, I'd guess that it's either an improper installation or an oil leak around some spacer or something that the seal might run on. When you put the seal in, put some non-hardening Permatex sealant around the outside edge of the seal where it goes into the case. Very important, put some oil or some type of lubricant on the shaft and the lip of the seal where it rides on the engine output shaft. When you start the engine up, it will turn up 2000 RPMs or better. The friction created by a dry installation will destroy the delicate lip on the seal in a fraction of a second before the engine oil can get to it. I see this happen a lot when people replace the seal on the backside of the inner primary. They put the seal in dry and the lip on the seal is burned up in the first second of engine operation. Also check your engine crankcase breather to make sure that it isn't restricted.

Good Luck
Steve.

Jun 07, 2011 | Harley Davidson FXSTB - FXSTBI Night Train...

1 Answer

Engine oil leak out the left side of 1993 harley davidson evolution engine.i replaced the deal & it is still leaking.what else do i need to look for?


Ok, this is a lot better. I used to tell people that I couldn't fix a motorcycle over the phone and here I am trying to do it on a computer. My how times have changed.

Now, the seal that you're talking about is the engine sprocket shaft seal. I may not have been in backwards since I don't know what way it was in the case. If you look at a seal, the lip is pointed in one direction. The seal should be installed with the lip pointed AGAINST the oil flow, in this case towards the inside of the engine.

Another thing that most people make a mistake one when installing a new seal is that they put it up dry. By dry, I mean that they do not lubricate the lip of the seal, not the outside diameter. The reason, when the engine starts up, it goes to 1000-1500 RPM almost instantly. The result is friction burns the lip of the new seal up before oil has a chance to get to it.

Next, the spacer that goes onto the sprocket shaft should have had a larger diameter on one end of it. This larger diameter goes on the backside of the seal against the bearing in the case. This helps keep the oil away from the seal. Also, it helps to put a bead of RTV around the sprocket shaft where it comes out of the spacer. This prevents oil that might run down between the shaft and the seal from leaking out.

This is the best that I can tell you without actually seeing your setup. Someone may have changed the spacer with one that came with the belt drive kit and it's allowing the oil to leak. If you would like an "exploded" view of how your bottom end is assembled, send me an e-mail at wd4ity @ bellsouth.net. I'll scan the picture in a service manual and send it to you.

Good Luck
Steve Bentley

Apr 27, 2010 | 1993 Harley Davidson FLSTF Fat boy

1 Answer

When replacing the quad seal and main shaft seal are there any other seals that go in that general area.. on 1998 softtail 5 speed transmission??


Yes, there is a small seal that goes inbetween the mainshaft and the final drive gear. If I were doing this job, I'd also replace the seal on the backside of the inner primary as well.

To replace the small final drive gear seal, you will need a special tool to remove the inner race of the primary bearing from the main shaft. Of course, I've seen lots of times when this seal was not replaced while in there with no consequences.

Also, check the splines on the inside of the front belt pulley. These are bad about wearing. I have seen therm wear to the point that they strip out and no longer drive the motorcycles. If allowed to wear too much, they'll start a wear on the final drive gear as well. You do not want that to happen as it will require the replacement of the final drive gear to repair this damage. High Dollars. Good Luck

Mar 03, 2010 | 2000 Harley Davidson FXST Softail Standard

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

Sep 17, 2009 | 2004 Harley Davidson FLSTC - FLSTCI...

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