Rear drive leaking gear oil on tire. 84 GL1200 Interstate


Information and questions on GL1200 Goldwings (1984-1987)
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peppilepew
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Rear drive leaking gear oil on tire. 84 GL1200 Interstate

Postby peppilepew » Thu Jun 09, 2011 7:01 pm



I just purchased a fixer upper. Sadly it sat for 4 years covered outside in New England weather. Many of you know what the story is here. The new rear tire has deterioration and softening from gear oil. The rear brakes don't work either. How much work is it to reseal the rear drive assy? Is it a 4 hour job?



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HALBUDD
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Re: Rear drive leaking gear oil on tire. 84 GL1200 Interstat

Postby HALBUDD » Thu Jun 09, 2011 10:08 pm

Not to hard but you will need to take rear wheel off,guess you will be putting new tire on anyway. Good time to molly it all up too due all the splines and check ujoint . I have had my rear drive off of my 85 aspey for a leek,found that there are two seals one on shaft and under the retaining ring you can still get them. If you look at service manual should be able to see them, Im not sure about seals on outer side towards wheel. Good Luck Hal P.S. look at how to at top of page look for how to remove your rear tire by WingAdmin its a little different but most of it will help.
A woman that can use tools is worth her weight in gold !!

peppilepew
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Re: Rear drive leaking gear oil on tire. 84 GL1200 Interstat

Postby peppilepew » Fri Jun 10, 2011 6:17 am

Parts breakdown shows 6 seals and 4 o-rings. It looks like a preference situation as to manufacturer of seal. Going to a dealer sometime today. The adventure begins.

peppilepew
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Re: Rear drive leaking gear oil on tire. 84 GL1200 Interstat

Postby peppilepew » Wed Jun 15, 2011 6:05 pm

I strapped the machine to a forklift today and pulled the rear tire, final drive and the clutch apart. This being the first motorcycle clutch I have dismantled it was quite an education. I was amazed at how easy the job is to do. Everything inside the housing was perfect. Spring is within tolerance along with the disc thickness. What I found was that the small vent hole in the clutch master was clogged thus preventing the release of pressure when releasing the lever. The slave was staying out preventing adequate apply pressure. Luckily the clutches were perfectly reusable. Tomorrow will be the final drive and rear brake work. I didn't need a basket to realign the clutches and steels. I aligned by eye and then adjusted with a blunt end chisel and a small hammer until full seating of the pack was attained.

peppilepew
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Re: Rear drive leaking gear oil on tire. 84 GL1200 Interstat

Postby peppilepew » Thu Jun 16, 2011 10:12 pm

Today was by far the most aggravating. I installed the new final drive seals without a problem. Getting the rear wheel back on was easy. Installing the shock mounting bolts brought me through more than just a few 4 letter words. There is little margin for error when aligning the shock bolts. I managed to get the rear brakes working with a simple bleed. I took her for a ride around the parking lot and think registration time has arrived. I want to put some miles on her before tweaking the carbs.

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Re: Rear drive leaking gear oil on tire. 84 GL1200 Interstat

Postby WingAdmin » Thu Jun 16, 2011 11:50 pm

Using a motorcycle lift makes lining up the shock bolts really simple. You might be able to do the same with a regular car jack on the back of the bike, and someone steadying the bike so it doesn't fall over, although a motorcycle lift is much safer. When the wheel is lifted off the ground, the swingarm drops and the bolts don't line up with the holes. When the wheel is on the ground, the swingarm lifts too far, and again, the bolts don't line up with the holes. So very slowly and gently with the lift (or jack), just lift the rear of the bike up, allowing the swingarm to drop, until the holes line up, and pop the bolts in. Doesn't take more than a couple of minutes.

peppilepew
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Re: Rear drive leaking gear oil on tire. 84 GL1200 Interstat

Postby peppilepew » Fri Jun 17, 2011 7:44 am

I have rebuilt many a Honda car transmissions. Honda cars are great for business. Honda's have easy to work on transmissions that generally last 100-140k. People get 200K + from the car so we see many a Honda cars for transmissions. After working on this 1200 I have furthered my love for their engineering. Everything is simple and straight forward. As for a lift I used an electric fork lift and heavy straps to lift the 800 pound beast to shoulder height. I lowered the machine as to apply upward pressure on the trailing arm to align the shock bolts. It was 90+ degrees in the shop that added to my frustration. There are times when it is better to pay labor. This wasn't one of them. This machine has been dumped a few times before I purchased it so cosmetics aren't a serious concern. The previous owners added lights and ran what looks like spaghetti wiring. Knowing the stator is a weak point today's task is to rewire everything through 1 switch and a fused relay. I wish to prevent a major short.

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Re: Rear drive leaking gear oil on tire. 84 GL1200 Interstat

Postby WingAdmin » Fri Jun 17, 2011 4:03 pm

When I got my bike I found the same spaghetti wiring - lots of abandoned circuits and wires that went nowhere, a bunch of stuff wired wrong - I gave up trying to fix it, ripped everything out and started over.

A hot garage always raises the frustration floor quite a bit. :)

peppilepew
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Re: Rear drive leaking gear oil on tire. 84 GL1200 Interstat

Postby peppilepew » Mon Jun 20, 2011 1:07 am

I grabbed the main feed for the added lights and immediately pulled the inline glass fuse. The fuse was so hot that I couldn't handle it. What amperage will a rectifier handle safely? Will the stator deliver an AC voltage relative to RPM's no matter what the load? I know a load will diminish potential, but how much is considered safe on a 84 gl1200?

peppilepew
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Re: Rear drive leaking gear oil on tire. 84 GL1200 Interstat

Postby peppilepew » Mon Jun 20, 2011 7:09 pm

I thought the clutch was 100%. When the machine gets hot the clutch slave won't disengage the clutch. My guess is there may still be some air left that is expanding with engine temp. One more attempt at bleeding and in goes a replacement clutch master. I registered and insured today. The permit was trickier than I expected. Even after driving 40 years I still missed 5 questions. 1 more miss and it would have been have a nice day old man. LOL I removed all the wiring added through the years and left the lights as reflectors.

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Re: Rear drive leaking gear oil on tire. 84 GL1200 Interstat

Postby WingAdmin » Mon Jun 20, 2011 9:44 pm

More likely you've got moisture in your clutch fluid. When it gets hot enough, the water boils, you get steam, which compresses instead of transferring the hydraulic pressure, and you're left without a clutch. Flush the clutch out with fresh fluid, bleed it, and you should be good to go.

peppilepew
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Re: Rear drive leaking gear oil on tire. 84 GL1200 Interstat

Postby peppilepew » Tue Jun 21, 2011 4:53 am

Moisture makes the most sense. I'll flush today with an air evacuation bleeder and most likely congratulate you on being correct. Thanks!

peppilepew
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2012 GL1800 Level 3

Re: Rear drive leaking gear oil on tire. 84 GL1200 Interstat

Postby peppilepew » Tue Jun 21, 2011 12:15 pm

Even easier than moisture. The fluid level even though better than half way in the sight glass was allowing air to enter the master. I bleed at the banjo fitting and filled her up. Time to ride. Thanks.
Cliff,

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Re: Rear drive leaking gear oil on tire. 84 GL1200 Interstat

Postby WingAdmin » Tue Jun 21, 2011 2:25 pm

If you haven't had the clutch line open for any reason lately, then you need to have a look at it. It's a closed system, and air should never be able to get into it. If air suddenly appears, then you should figure out how.

peppilepew
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2012 GL1800 Level 3

Re: Rear drive leaking gear oil on tire. 84 GL1200 Interstat

Postby peppilepew » Wed Jun 22, 2011 12:50 am

I had the master off for cleaning. We didn't fill it enough after bleeding. There was moisture in there the first time. All of the contaminated fluid was bleed off. The rubber seal under the master cover may need replacing. I believe the valve seals may have dried out from sitting so long. A good amount of smoke is generated on start up. Time to ride. Bike has hard a hard 58K miles.

peppilepew
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Re: Rear drive leaking gear oil on tire. 84 GL1200 Interstat

Postby peppilepew » Thu Jun 23, 2011 9:49 am

Everything seems to be working okay. I took her out for a little spin in the drizzle and was very happy with how it rides and handles. Rain forecast for the remainder of the week. :cry:




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