 Reset Master Cylinder Warning Piston? |
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| bkrantz |
 Mar 30 2022, 08:46 PM
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#1
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914 Guru  Group: Members Posts: 7,835 Joined: 3-August 19 From: SW Colorado Member No.: 23,343 Region Association: Rocky Mountains 
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Seems like the small diameter piston that triggers the brake fluid pressure warning light in my new MC is not centered, so the small diameter segment is not aligned with the hole for the switch plunger. This photo shows the piston removed from my old MC.
Does anyone know how to reset or recenter the piston in the MC? (not reset the plunger on the switch) |
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| bkrantz |
Apr 2 2022, 10:01 PM
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#2
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914 Guru Group: Members Posts: 7,835 Joined: 3-August 19 From: SW Colorado Member No.: 23,343 Region Association: Rocky Mountains
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The second problem is that the distance from the internal bore to the warning switch mounting face is about .04" less on the new one. This means that even with the piston centered, the pumper on the warning switch is depressed enough to close the switch and turn on the warning light.
Not happy with this bargain MC. Attached thumbnail(s) 
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Posts in this topic
bkrantz Reset Master Cylinder Warning Piston? Mar 30 2022, 08:46 PM
bkrantz Bump.
Eric @Eric_Shea , do you have any suggesti... Mar 31 2022, 03:53 PM PatMc
Seems like the small diameter piston that trigger... Mar 31 2022, 05:41 PM bkrantz Thanks. I tried prying, and then pressing on the ... Apr 1 2022, 07:27 PM GregAmy There's springs on either side to center it...... Apr 1 2022, 08:14 PM bkrantz See my build thread for more details, but I ended ... Apr 2 2022, 09:57 PM robkammer Can I could jump in the middle here with a questio... Apr 3 2022, 12:34 PM
GregAmy
Remember, this is a brand new MC.
Not good.
My ... Apr 3 2022, 02:08 PM robkammer
Remember, this is a brand new MC.
Not good.
My... Apr 3 2022, 05:02 PM bkrantz That's right. There should be no brake fluid ... Apr 3 2022, 06:58 PM robkammer Mark called me back yesterday and feels it may be ... Apr 5 2022, 09:18 AM |
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