Article [13] ST1300 - Brake Maintenance - Replacing the Secondary Master Cylinder (SMC)

[jfheath]

The fluid should escape by itself to the rear master cylinder. Worth checking that the rear reservoir isn't full beyond the max line. Otherwise that SMC is chief suspect.

 

[Esti1300]

use the lipstick paste type version.

+1 on this.

 

[Igofar]

I removed the caliper and that bushing is in nice shape. Very shiny and smooth, and pushes in and out and rotates smoothly. The SMC piston will not move at all. Maybe because of the brake line fluid pressure. Should I perform the test of opening the bleeder on the PCV and see if that frees it up, or does this pretty much point me to ordering a new SMC?

You may want to give the white courtesy phone a call before you start ordering stuff.
You may need more parts than you think, and paying shipping twice sucks.
Also, just verifying that the piston in not frozen, does not assure that the rear cartridge and screen is not blocked.
The call is free.

 

[Andrew Shadow]

I cannot find anywhere that tells me what ALOC stands for.

ALOC fasteners are very common in the aviation world. They are thread-less 1/4 turn fasteners commonly used to hold fuselage panels in place.

I know that the above is NOT what Honda is referring to when they use the tem ALOC. I have never found a description of what they mean either, so if ever you do let us know.

 

[Igofar]

Add Locktite Or Crash

 

[Wes]

You may want to give the white courtesy phone a call before you start ordering stuff.
You may need more parts than you think, and paying shipping twice sucks.
Also, just verifying that the piston in not frozen, does not assure that the rear cartridge and screen is not blocked.
The call is free.

Very grateful to Larry for his time and help on the white courtesy phone helping diagnose any other related issues to the SMC issue, helping me create a parts list, then once those arrived, guided me through the removal and replacement of the SMC, the rear brake caliper bracket, and then bleedings the brakes! So nice having the bike back on the road AND stopping better than ever! Many rich and abundant blessings to you good sir for your time, patience, and thoroughness!!!

 

[ST1100Y]

I cannot find anywhere that tells me what ALOC stands for.

"locking compound already applied"
Honda ones mostly come with red "wax" applied...

... most people - incuding me - will clean up the old bolt threads and apply loctite. But there are types of bolt that must never be re-used. I don't know if this is one. The manual says to fit new.

Inspect them very carefully prior any intended reuse...
Bolts stress and stretch, thus can fail, especially when undergoing several installation routines over the years...
In the past I caught some in time...
like the ones holding the caliper on the RHS fork bottom (NT700 and ST1100) showing signs of stretching (you sense that they're feeling kinda "elastic" upon loosen or torque them...)
Or the ones holding the locking plate/cover of the hub dampers, you might reuse them 4, maybe 5 times, and then they simply snap way before the given torque rating...
So there reasons when the Honda manual says [R] on such items...

I use the lipstick paste type version.

Like Loctite 248

Loctite Medium Strength Threadlocker (Blue) : Amazon.de: DIY & Tools

Loctite Medium Strength Threadlocker (Blue) : Amazon.de: DIY & Tools

www.amazon.de