Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

dual piston zeno caliper

Old 04-21-19, 03:25 PM
  #1  
Troul
:D
Thread Starter
 
Troul's Avatar
 
Join Date: Oct 2013
Location: Mich
Posts: 1,471
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 3 Times in 2 Posts
dual piston zeno caliper

Had an interesting failure with a mechanical dual piston zeno caliper.
The roll pin that goes into the brake caliper pulling lever lost its set screw & the roll pin slid out from the lever during a stopping event.
That roll pin serves as a multifunction part; it clamps the cable in place & engages the two pistons.

The small machine screw is nowhere to be found & the roll pin is now damaged from banging around getting caught in the rotor.
The caliper came preassembled. Essentially a non serviceable area of the caliper.

Has anyone had this happen?

Part Number I found is "B074HT4Z5P"
Troul is offline  
Old 04-21-19, 05:06 PM
  #2  
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 40,871

Bikes: 8

Mentioned: 182 Post(s)
Tagged: 0 Thread(s)
Quoted: 6542 Post(s)
Likes: 0
Liked 51 Times in 47 Posts
Never heard of them, until now, so I looked online... OEM only parts pick ? ( I only see sellers links not the company )

looks like it's mechanism is along the same line as TRP Spyre/Spyke 1 actuator operates a moving pad on both sides

why not toss that one and buy the TRP ? they have perhaps better service ?
fietsbob is offline  
Old 04-21-19, 05:51 PM
  #3  
Troul
:D
Thread Starter
 
Troul's Avatar
 
Join Date: Oct 2013
Location: Mich
Posts: 1,471
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 3 Times in 2 Posts
Originally Posted by fietsbob View Post
Never heard of them, until now, so I looked online... OEM only parts pick ? ( I only see sellers links not the company )

looks like it's mechanism is along the same line as TRP Spyre/Spyke 1 actuator operates a moving pad on both sides

why not toss that one and buy the TRP ? they have perhaps better service ?
I did end up going the TRP brand. Was just curious if others have had the same misfortune as I with ZENO calipers.
Troul is offline  
Old 04-21-19, 08:51 PM
  #4  
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 31,401

Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!

Mentioned: 32 Post(s)
Tagged: 0 Thread(s)
Quoted: 1108 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
Was it really a "roll pin" you lost? Properly chosen roll pins are sized to be a snug drive fit in their respective hole and do not need a set screw to retain them. In fact you need a hammer and matching punch to remove them. I assume what you lost was a relatively loose fitting solid pin.
HillRider is offline  
Old 04-22-19, 01:51 PM
  #5  
Troul
:D
Thread Starter
 
Troul's Avatar
 
Join Date: Oct 2013
Location: Mich
Posts: 1,471
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 3 Times in 2 Posts
The attached is to what I could best describe the missing roll pin.
Also showing the failed caliper.
Troul is offline  
Old 04-22-19, 02:09 PM
  #6  
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 40,871

Bikes: 8

Mentioned: 182 Post(s)
Tagged: 0 Thread(s)
Quoted: 6542 Post(s)
Likes: 0
Liked 51 Times in 47 Posts
You choose to buy those or were they a cheaper part that the factory chose in their OEM parts specs?..

this is a roll pin.. it goes in a tight hole , forced to compress , , keeping it tight


Last edited by fietsbob; 04-22-19 at 02:16 PM.
fietsbob is offline  
Old 04-22-19, 02:21 PM
  #7  
Troul
:D
Thread Starter
 
Troul's Avatar
 
Join Date: Oct 2013
Location: Mich
Posts: 1,471
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 3 Times in 2 Posts
non oem. I could not identify the part's terminology, therefore I applied what I thought best to describe it,
Troul is offline  
Old 04-22-19, 02:28 PM
  #8  
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 40,871

Bikes: 8

Mentioned: 182 Post(s)
Tagged: 0 Thread(s)
Quoted: 6542 Post(s)
Likes: 0
Liked 51 Times in 47 Posts
internet may have the manufacturer , All I got with my search was sellers.. middlemen ..


Toss it in a Bin & go on with your life ...


fietsbob is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.