Question about 1982 Honda CX 500 B

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Final drive oil seal replacement - 1982 Honda CX 500 B

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  • drneo May 11, 2010

    Are you talking about the drive itself or where the output shaft comes out from the engine?

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The problem is that the engine, or swing arm should be removed in order to make his job easy . Make sure that the bearing behind the seal doesn't have play side to side . I don't think you could get enought room to slip the new seal over the shaft by removing the final drive unit at the rear wheel, the locking bolt under the rubber boot behind the seal,and sliding the drive shaft assembly back into the swing arm cup . If you have to pull the swing arm off, it would be a good time to re-pack the bearings with moly grease . The old seal just prys out, and the new seal must be tapped in evenly . Do not distort the seal . Try to find something round that fits the seal to tap opon . I have used plastic pipe . J

Posted on Nov 29, 2009

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1 Answer

Where can I find/purchase a final drive bearing oil seal. And, any suggestions on how to fix it in the meantime.


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You have a final drive leak that is accumulating in the "accordion". You need to replace the output seal on the FD. There should be no oil in the "accordion"

May 08, 2014 | 2005 BMW R 1100 S

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Just changed primary gaskets and all seals on this side i have oil dripping never been in gear just started up could it be crank breather problem


Did you change the seals behind the front belt drive pulley? The front pulley is made of cast iron and the final drive gear is made of hardened steel. It's specifically made this way so that the pulley wears instead of the expensive and difficult to replace final drive gear. When the splines in the pulley wear, the pulley loosens up and the tension on the "quad" seal behind the spacer is lost. This allows transmission oil to run down the splines of the final drive gear. Check the oil level in your transmission and see if it's low. When you start the engine or ride the bike, it'll leak a spot about the size of a half dollar. If you wipe that up, it will not leak anymore unless you start the engine or ride the bike. You'll have to pull the front pulley off to check the splines for wear. If they are worn, Harley makes a kit to repair this with.

Now, it could still be the seal in the backside of the primary. A lot of people make the mistake of putting this seal in and assembling the primary with the seal left dry. When the engine starts, the mainshaft starts to turn and the friction burns the lip of the seal up before oil can get to it. The seal is destroyed in the first ten seconds or shorter. When you replace the seal, always put a gasket sealer around the outside of the seal and put some oil or light grease on the lips of the seal before you assemble it.

It's not your crankcase breather as that is at the top of the heads. The two large bolts that hold the air filter backing plate on are hollow and the crankcase breathes through these bolts into the air cleaner.

Good Luck
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Apr 02, 2011 | 2003 Harley Davidson FXDWG Dyna Wide Glide

1 Answer

I noticed what appeared to be oil leaking from the housing where the drive shaft connects to the rear wheel. I have a 2006 Honda Shadow Aero.


The first thing to do is determine if the oil is motor oil or gear oil. If the oil is leaking from the final drive end( gear oil ) it will have to be removed and inspected for bearing wear and have the seal replaced. If the oil is leaking from the motor and then running down the swingarm, the final drive and swingarm will have to be removed to replace the output shaft seal.
Thanks and I hope that this helps.
Steve

Jan 05, 2011 | 2006 Honda VT 750 Shadow

1 Answer

I have a 2004 Duece FXSTD. Drops of oil was found on the floor under clutch area of the primary. After some inspection, I found that it was streaming from the inner primary.Got a seal set from Motor...


Did you check your front belt pulley? These pulleys are made of relatively soft cast iron as compared to the final drive gear. This is so that the easily replaced and relatively inexpensive front pulley wears before the difficult to replace and expensive final drive gear wears. The pulley will wear in the splined inner bore and will get loose on the final drive gear. Then transmission oil will run out of the pulley and down the inner primary. This is because of the lose of pressure on the "Quad" ring behind the pulley spacer. This may be your problem.

Another mistake a LOT of people make when replacing any seal is putting the seal up dry. On the inner primary seal, you want to put a bit sealer compound around the outer edge of the seal where it goes into the case. Although there are a lot new sealants out there, I still prefer good Permatex non-hardening. Once you get the seal in and straight, oil the inner seal surfaces and the bearing race. If you put the seal up dry, you start the engine, the mainshaft turns about 1000 rpm. This will burn up the delicate rubber lips on the seal almost instantly because of friction before the oil can get to the seal. You MUST lubricate the seal or it WILL burn up before you can blink an eye.

Also check the position of the inner primary bearing race. It must be 0.100" from the final drive gear. If it's way out of position, the seal may not be riding properly on it.

If you are in doubt about whether the transmission is leaking or the primary, refill the primary with a quart of automatic transmission fluid, the red stuff. It will work long enough for you to determine whether it's the transmission leaking or the primary leaking. If it's the transmission, check the front belt drive pulley for wear, You'll usually find that the large nut that holds it on is loose.

Good Luck
Steve

Dec 27, 2010 | 2004 Harley Davidson FXSTD - FXSTDI...

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How to renewe oil seals in final drive on r100


Hi, Roystonpayne sorry you can't find the first and best tool you ever bought for your BMW but despair not for a mere $0 you can download another one. For more information about your issue and free downloads that you need please visit the websites below. Good luck and have a nice day.
R100GS PD Final Drive Pinion Oil Seal part 1
R100GS PD Final Drive Pinion Oil Seal part 2
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BMW Motorcycle Parts Fiche OEM BMW Motorcycle Parts online 1970 present BMW
http://www.bmw-motorrad.com/us/en/index.html?content=http://www.bmw-motorrad.com/us/en/services/manuals/manuals_main.html¬rack=1

Oct 29, 2010 | 1983 BMW R 100

1 Answer

Oil leaking from final drive. Seems to be coming from around the axle.


Depending on which side is leaking, it could indicate a simple seal replacement or something more serious like a failing bearing.

Leaking on RHS, is probably just a seal replacement. Leaking on LHS by the brake rotor and wheel may indicate a bearing about to fail. Put bike on center stand and get down beside the wheel. Hold wheel (with trans. in neutral) at 12 and 6 O'clock position try to move wheel by pulling and pushing towards yourself and away from yourself. There should be a barely discernable amount of play in the final drive bearing. Now, rotate wheel and feel/listen for grinding or other vibration that might indicate a bearing problem. If you have mechanical skills, you can drain the oil from the final drive an check for excessive metal particles.

Let us know what you find out!

Sep 22, 2010 | 2006 BMW R 1200 GS Adventure

1 Answer

Gear oil is leaking from the seal in rear drive behind the wheel is this difficult to repar


While it is not difficult to replace the seal, this usually indicates that the main bearing in the final drive has failed and pushed out/damaged the seal causing the leak.

Put bike on center stand and hold rear wheel with both hands and 12 and 6 O'clock positions. Try to move wheel by pushing towards the side of the bike in each direction. If wheel moves more than 1-2mm then you need to have final drive repaired. You can also remove drain plug at the bottom of the final drive and see if any metal particles drain out with the oil. Use a small drain pan to catch the oil.

Sorry, but likely not an easy seal replacement to fix this problem.

Sep 11, 2010 | 2002 BMW R 1150 RT (ABS)

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.

Apr 22, 2010 | 2004 Harley Davidson FLTRI Road Glide

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