Shimano bleed screw thread on new levers

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dtwolfen
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Joined: Wed Feb 15, 2017 9:05 pm

by dtwolfen

I had the old r785 levers and just got the new 8070 levers. I would like to ride tomorrow but no adaptor. Anybody know the thread on the adaptor? I have a plumber who can bring pieces for beer but will not bring the truck with the pieces (good man knows his limits). If I can find it I can bleed and ride. Thank you

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Klaster_1
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Location: Russia

by Klaster_1

The thread outer diameter is 6.9mm, distance between four threads is 2.2mm. I think it's a M7x0.5. Total threaded part length is 4.82mm. The rubber O-ring is 1.2mm thick. No idea how Shimano decides when to include an adapter, but my set of ST-R9120 had one and left ST-R9170 had zero, both in fancy DA packaging. The adapter is annoying to use to be honest, since you can't put the funnel into stand anymore and it will leak more oil afterwards because there's more volume below the plunger.
Last edited by Klaster_1 on Wed May 29, 2019 5:47 am, edited 1 time in total.

by Weenie


dtwolfen
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by dtwolfen

Great, thank you, I'll give it a try.

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jlok
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by jlok

Plus the hex is super easy to strip... make sure your hex key is of top quality.
Litespeed T1sl Disc / BMC TM02 < Giant Propel Advanced SL Disc 1 < Propel Adv < TCR Adv SL Disc < KTM Revelator Sky < CAAD 12 Disc < Domane S Disc < Alize < CAAD 10

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Klaster_1
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by Klaster_1

jlok wrote:
Wed May 29, 2019 6:13 am
Plus the hex is super easy to strip... make sure your hex key is of top quality.
It's more of a tolerances issue, among several hex wrench sets I have, the worst, most annoying to use fit best.

dtwolfen
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Joined: Wed Feb 15, 2017 9:05 pm

by dtwolfen

No worries on getting the hex out. They was easy. Just wanting to fill it up is frustrating with a different adaptor needed.

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dtwolfen
Posts: 41
Joined: Wed Feb 15, 2017 9:05 pm

by dtwolfen

So no go with plumbing supply fitting found one that seemed to loosely fit but fluid just dribbled out. Waiting a few days for the post to arrive. Need to ride back up bike now. How hard would it have been to keep the same threads and use an extension.

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Klaster_1
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by Klaster_1

dtwolfen wrote:
Wed May 29, 2019 2:24 pm
How hard would it have been to keep the same threads and use an extension.
I think Shimano decided for bigger thread size not because of recess (ST-R9120 bleed nipple is on top) but because of different lever body material: ST-R785 and ST-RS685 had aluminium alloy body and 8000/9100 levers are some sort of plastic. Same reason for bigger thread on hose bolt.

by Weenie


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