GL1000 final drive fluid overflowing?


Information and questions on GL1000 Goldwings (1975-1979)
  • Sponsored Links
Ducman
Posts: 7
Joined: Wed Mar 23, 2016 12:36 am
Location: Calgary AB
Motorcycle: 1976 GL-1000

GL1000 final drive fluid overflowing?

Postby Ducman » Thu Apr 07, 2016 10:49 pm



1976 GL1000. The previous owner said the only thing I should do is the final drive fluid. He didn't do it because he didn't ride much at all, which is true. First, I removed the fill bolt and very used black oil started overflowing out of the fill hole. Maybe 15-20ml overflowed out.
Then I removed the drain bolt and let it drain completely with some wheel rotation to remove what I could. I have only drained clean gear oil so it was different to me.
So what would cause overflowing out of the fill hole? Theoretically the level of the oil shouldn't be above the bottom of the fill hole... I doubt it was overfilled?
Maybe the metal gears/splines shed some metal and the volume of metal + gear oil was above the level of the fill hole?

What do you think happened here? Just a overfilling many miles ago with viscous gear oil on a cold Alberta winter night, and impatience to let it drain to the bottom of the fill hole?


You can read how specific I am below, if you care, for amusement.
After draining the old, used gear oil...
Then I fit the drain bolt finger tight, filled with Mobil1 90 weight gear oil, fit the fill bolt finger tight and rotated the wheel by hand for 2 minutes to rinse as much as possible. I then drained it, it was a bit dirty, so I refilled with more gear oil and rinsed it again. It drained clean, I shouldn't have drained this refill. Too late now, so I refilled with fresh gear oil until the oil level reached the bottom of the fill hole, torqued the bolts to spec and I'm done.



User avatar
Aussie81Interstate
Posts: 683
Joined: Thu Nov 27, 2014 2:34 am
Location: Penrith Australia
Motorcycle: 1982 CX500 Turbo (restoration project)
1981 GL1100 Interstate (sold)
1988 GL1500

Re: GL1000 final drive fluid overflowing?

Postby Aussie81Interstate » Thu Apr 07, 2016 11:20 pm

What you have done is fine, maybe the last person filled it up when it was freezing outside-- who will ever know.

When you drained it out - had the bike been running at all - running could have heated it up a bit causing a bit of expansion - then when the top filler bolt released there was a small overflow.

Personally I would have flushed with some kerosene twice after rotating for a few minutes each time - then put a small amount of gear oil in - a little bit of rotation - drain that out - then fill it up with new oil - done.

User avatar
ct1500
Posts: 813
Joined: Wed Nov 10, 2010 8:09 pm
Location: Glastonbury,CT
Motorcycle: 1988 GL1500
Contact:

Re: GL1000 final drive fluid overflowing?

Postby ct1500 » Fri Apr 08, 2016 2:50 am

The previous fill was likely done leaning over on the side stand instead of straight up.
This is what I do
Local and need repair help with your 1500, Valkyrie or ST please PM

User avatar
dingdong
Posts: 2864
Joined: Thu Apr 08, 2010 8:35 am
Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500
2004 NRX1800 Rune

Re: GL1000 final drive fluid overflowing?

Postby dingdong » Fri Apr 08, 2016 7:30 am

ct1500 wrote:The previous fill was likely done leaning over on the side stand instead of straight up.


I agree with side stand overfill.
Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

Ducman
Posts: 7
Joined: Wed Mar 23, 2016 12:36 am
Location: Calgary AB
Motorcycle: 1976 GL-1000

Re: GL1000 final drive fluid overflowing?

Postby Ducman » Fri Apr 08, 2016 10:46 am

Good thinking people, the side stand fill is the most logical explanation.
Thanks!




Return to “GL1000 Information & Questions”




Who is online

Users browsing this forum: No registered users and 2 guests