How To Remove A Brass Compression Ring

Sep 10, 2022 / Creepo Service

This article will help in identifying the crank arrangement plant on your bicycle, and direct you lot to the article that outlines the full procedure of removal and installation.

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Identifying Your Crank System

Cranks are levers that connect the pedals to the bottom bracket spindle. The cranks are fitted with toothed sprockets called chainrings that drive the chain. Cranks may be removed to replace cranks or chainrings, service the bottom bracket bearings, or to make clean the chainrings. Crank systems accept become more complex in recent years. To know the service options yous will need to know the type of crank and type of bottom bracket begetting system installed in the bicycle.

If y'all don't know what creepo organisation y'all take, yous can use the video in a higher place or the information in this article below to assist you in identifying your crank type.

Cocky-Extracting Cranks

Self-extracting system with pin holes in retaining cap

Self-extracting system with hole fitting in retaining cap

On self-extracting creepo systems, the crank puller is finer congenital into the crank. Self-extracting systems use threaded rings that look similar to a crank dust cap. Still, these crank retaining rings are threaded over the crank bolt, so that when the creepo bolt is loosened the shoulder of the bolt presses back against the band, which in plow slowly pushes the arm from the spindle. No additional crank removal tools are required. Self-extracting systems be in both 2-slice and three-piece form.

Creepo Removal and Installation: Self-Extracting

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Two Piece Compression Slotted Cranks

Many Shimano® and some FSA® cranksets use a two-piece compression slotted system. These have a left creepo arm with a compression slot that is secured past two pinch bolts and a right creepo arm with an integrated spindle. These systems use external bearing cups and do not demand a conventional creepo puller.

Crank Removal and Installation: Ii-Piece Pinch Slotted

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Campagnolo® Power-Torque™ Cranks

Install mold over crank and install extension plug

The Power-Torque™ crank uses a spindle integrated into the bulldoze side crank. The left side crank is removed to get to the bearings or to remove the correct crank.

Crank Removal and Installation: Campagnolo® Power-Torque™

Campagnolo® Ultra Torque™ Cranks

Ultra-Torque™ is a proprietary crankset organisation used by Campagnolo® and Fulcrum®. With this organization, both the left and right creepo arms are fitted with one-half of the spindle system, with teeth machined into each spindle end. While Ultra-Torque™ uses external bearing cups, the bearings are not integrated. Instead, the bearings are mounted onto the cranks.

There is a "wavy washer" in the left side cup. This washer is used to business relationship for variations in frame shell widths and effectively acts as the bearing adjustment.

Crank Removal and Installation: Campagnolo® Ultra Torque™

3 Piece Cranks

The parts of the three-piece crankset are the left arm, right arm, and axle spindle. The spindle is held in position past bearings in the frame. Both cranks must be removed to service or replace the bearings of a three-slice system. Both left and correct cranks will have creepo bolts in the arms.

Three piece cranksets generally have one of 2 interfaces: square spindle artillery or splined spindle arms.

Creepo Removal and Installation: Iii-Piece

BMX Three Piece Cranks

Many BMX and freestyle bicycles utilize a unique crank system that utilizes a 48 spline spindle. The process of servicing these cranksets is slightly different than standard 3-piece cranksets.

Crank Removal and Installation: BMX 3-Piece Style

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I Piece Cranks

One-piece cranks are constitute on some older Schwinn® bicycles, many children's and BMX bikes, and on many department store-type bikes. One piece of steel forms the crank arms and goes from the pedal, through the bottom bracket, to the other pedal. This crank also acts as the bottom bracket begetting beam.

Crank Removal and Installation: One-Piece

Source: https://www.parktool.com/blog/repair-help/how-to-remove-and-install-a-crank

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