Changing Fluid on GL1500 Air Shock


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Richman2000
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Changing Fluid on GL1500 Air Shock

Postby Richman2000 » Mon Aug 19, 2013 1:07 pm



I’ve been reading about changing the fluid on the GL1500 Air Shock. It’s the only fluid on the wing that I haven’t replaced. You can refill it with Honda Suspension fluid, or ATF. I chose to use 140ml of ATF.
Remove the right luggage compartment, along with all the other nearby Tupperware and seat.

Remove the airline from the top of the shock

Compress the spring and remove by sliding it down. Be careful to keep the open hole facing upward to reduce a chance of spillage.
After removing the shock, hold it over a container with the hole facing down, then extend and compress the shock several times. The fluid will spray out of the shock. It can be messy if your not careful. This was the “fluid” that came out of the shock. Only about 90ml.

I used regular ATF to fill the shock. The measuring cup, and fill bottle came from the dollar store. After measuring out 140ml of ATF, I poured it into the bottle.

I secured one end of the shock so that I could extend and compress the other end of shock. This is also a very good time to replace the shock boot it it’s in the condition mine is. That’s another part I need to pick up.


Place the tip of the bottle into the hole, and squeeze the bottle while extending the shock. It will suck the fluid inside. Sorry for the fuzzy pic.

After filling the shock, compress it again and replace it into its original location. I took it for a short ride, didn’t really feel a difference, but time will tell.
Ride Safe,
Rich



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minimac
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Re: Changing Fluid on GL1500 Air Shock

Postby minimac » Mon Aug 19, 2013 3:31 pm

As long as guys don't confuse using ATF in the shock for fork oil in the forks. As always, nice write up and pics!

Richman2000
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Re: Changing Fluid on GL1500 Air Shock

Postby Richman2000 » Thu Aug 22, 2013 10:20 am

Minimac, Thanks for the good words. When I was writing this up, I was figuring on peoples common sense. Now that I think about it, "DO NOT USE ATF IN YOUR FORKS".

Ride Safe,
Rich

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keith3po
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Re: Changing Fluid on GL1500 Air Shock

Postby keith3po » Thu Sep 05, 2013 10:08 am

Got my rear shocks off at the moment and there isn't any oil in the air shock and I can't find any reference to it in my Haynes manual.
Is it for lubrication or does it work the suspension?
You put 140ml in is it the same for all models?
Thanks for the write up I didn't know it had oil in it. :(
GL1500L 1990 ST1100W 1998

Richman2000
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Re: Changing Fluid on GL1500 Air Shock

Postby Richman2000 » Thu Sep 05, 2013 1:44 pm

It should be the same. When you removed the air line from the shock, did you try pumping it? It compresses and expands easily. If no oil came out, then I think you where 140ml low on oil. Try filling it and see what happens. I don't know the function of the fluid.

Ride Safe,
Rich

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keith3po
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Re: Changing Fluid on GL1500 Air Shock

Postby keith3po » Thu Sep 05, 2013 1:51 pm

Richman2000 wrote:It should be the same. When you removed the air line from the shock, did you try pumping it? It compresses and expands easily. If no oil came out, then I think you where 140ml low on oil. Try filling it and see what happens. I don't know the function of the fluid.

Ride Safe,
Rich

Yep it pumps really easy and definitely no oil in there i'll put some in when I rebuild the bike thanks again. :D
GL1500L 1990 ST1100W 1998

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keith3po
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Re: Changing Fluid on GL1500 Air Shock

Postby keith3po » Wed Sep 25, 2013 9:52 am

Thanks again for this, worked a treat. :D
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drebudrebu
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Re: Changing Fluid on GL1500 Air Shock

Postby drebudrebu » Wed Apr 30, 2014 8:49 am

Where can you find the shock boot? I have been on multiple sites and all I can find is the whole assembly for over $200, not the boot by itselft.

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bjatwood
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Re: Changing Fluid on GL1500 Air Shock

Postby bjatwood » Wed Apr 30, 2014 2:32 pm

I got a shock boot from O'Rielly's Auto parts. Had to shorten the boot a bit, but the boot was less than 10 bucks. ;)

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Re: Changing Fluid on GL1500 Air Shock

Postby Dogsled » Sat Aug 09, 2014 1:12 pm

bjatwood
You wouldn't happen to have the number for the O'reillys boot you bought in your records by chance???
"Fight until hell freezes over, then fight on the ice"

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Re: Changing Fluid on GL1500 Air Shock

Postby bjatwood » Sat Aug 09, 2014 7:33 pm

Try RS1927. It's like 5.00 bucks and you can shorten it if you need too.

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Re: Changing Fluid on GL1500 Air Shock

Postby Dogsled » Sun Aug 10, 2014 9:23 am

thanks, I got a used one coming with the boot torn.
"Fight until hell freezes over, then fight on the ice"

GBKid
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Re: Changing Fluid on GL1500 Air Shock

Postby GBKid » Sat Jul 04, 2015 3:28 pm

can you use Moly 60 paste to lightly lubricate the smooth portion of the lower air shock mounting bolt?
Last edited by GBKid on Sat Jul 04, 2015 7:10 pm, edited 1 time in total.

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Re: Changing Fluid on GL1500 Air Shock

Postby GBKid » Sat Jul 04, 2015 7:05 pm

What are the torque specs for the upper and lower air shock mounting bolts?

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Re: Changing Fluid on GL1500 Air Shock

Postby WingAdmin » Mon Jul 06, 2015 10:20 am

GBKid wrote:can you use Moly 60 paste to lightly lubricate the smooth portion of the lower air shock mounting bolt?


Grease or Moly 60 paste will work fine for this application.

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Re: Changing Fluid on GL1500 Air Shock

Postby WingAdmin » Mon Jul 06, 2015 10:20 am

GBKid wrote:What are the torque specs for the upper and lower air shock mounting bolts?


Left side:
Upper bolt: 17 ft-lb
Lower bolt: 51 ft-lb

Right side:
Upper and lower bolts: 17 ft-lb

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Re: Changing Fluid on GL1500 Air Shock

Postby millerized » Mon Mar 07, 2016 8:48 am

I see here you say never to use ATF in the front forks....and yet in the "How to rebuild your forks" DIY page (viewtopic.php?f=14&t=16118 Step #45) it states it is an acceptable substitute for fork oil.
Not that I can't afford either one, but....just a bit of clarification across the board.

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Re: Changing Fluid on GL1500 Air Shock

Postby WingAdmin » Mon Mar 07, 2016 1:46 pm

ATF is perfectly fine to use as fork oil, it is equivalent to about 10 weight fork oil. Fork oil itself is often just relabeled hydraulic oil.

In fact, up until the GL1200, Honda service manuals specified ATF for use in the forks. For the GL1500 onward, they clued into the fact that they could do better by specifying the use of "Pro-Honda Suspension Fluid SS-8 or Equivalent", and then sell their overpriced hydraulic fluid and make a few bucks. :)

Incidentally, the ""Pro-Honda Suspension Fluid SS-8" fluid is 10-weight hydraulic fluid - the same as ATF.

Last time I did my forks I put 15 weight oil in them to firm them up a bit. I think next time I'll go back to 10 weight oil.

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Re: Changing Fluid on GL1500 Air Shock

Postby millerized » Mon Mar 07, 2016 1:48 pm

WingAdmin wrote:ATF is perfectly fine to use as fork oil, it is equivalent to about 10 weight fork oil. Fork oil itself is often just relabeled hydraulic oil.

In fact, up until the GL1200, Honda service manuals specified ATF for use in the forks. For the GL1500 onward, they clued into the fact that they could do better by specifying the use of "Pro-Honda Suspension Fluid SS-8 or Equivalent", and then sell their overpriced hydraulic fluid and make a few bucks. :)

Incidentally, the ""Pro-Honda Suspension Fluid SS-8" fluid is 10-weight hydraulic fluid - the same as ATF.

Last time I did my forks I put 15 weight oil in them to firm them up a bit. I think next time I'll go back to 10 weight oil.

Figured you had it right, since it was YOUR bike that was draining ;)

I've mixed viscosities before, when 15 was too harsh and 10 wasn't enough.

Honda doing something like that to make money? Nawh, never happen. Next time you'll tell me HD doesn't rebrand Chinese stuff and resell it :roll:


:lol: :lol:

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Re: Changing Fluid on GL1500 Air Shock

Postby nightprowl3r » Sun Oct 02, 2016 10:38 am

Advance auto #sa1997 shockmate $8.09 needs cut to size and fits nice and tight

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Re: Changing Fluid on GL1500 Air Shock

Postby guitarzan » Thu Nov 03, 2016 6:38 pm

Just any kind of Transmission Fluid will do?

Thanks
Frank

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Re: Changing Fluid on GL1500 Air Shock

Postby WingAdmin » Fri Nov 04, 2016 9:01 am

guitarzan wrote:Just any kind of Transmission Fluid will do?

Thanks
Frank


Basically any quality ATF, which itself is just hydraulic fluid.

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Re: Changing Fluid on GL1500 Air Shock

Postby guitarzan » Fri Nov 04, 2016 2:37 pm

I was looking and there seemed to be so many different types I just wanted to make sure I wasn't going to mess anything up.

Thank you.

Frank




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