This document serves as a comprehensive dealer's manual for Shimano cranksets, covering installation, maintenance, and safety guidelines across various bicycle types including Road, MTB, City Touring/Comfort Bike, Urban Sport, Trekking, and E-Bike. It is primarily intended for professional bicycle mechanics to ensure correct and safe handling of Shimano components.
Function Description
The manual details the installation and maintenance procedures for Shimano cranksets, which are a fundamental component of a bicycle's drivetrain. Cranksets convert the rider's pedaling motion into rotational force to drive the chain, ultimately propelling the bicycle. The document covers several series of cranksets, including DEORE XT, SLX, DEORE, and Non-Series models, along with various bottom bracket types (BB-MT800, BB-MT801, SM-BB52, BB-MT501, BB-MT500-PA, BB-MT800-PA). The instructions are designed to ensure optimal performance, durability, and safety of the crankset and associated components.
Usage Features
The manual emphasizes several key usage features and considerations for both mechanics and end-users:
- Safety First: Users are strongly advised to read the manual thoroughly and follow all instructions to prevent personal injury and physical damage. It highlights the importance of professional installation and warns against attempting installation if any part of the information is unclear.
- Genuine Parts: The use of only SHIMANO genuine parts is crucial. Incorrectly assembled or adjusted components can lead to failure, loss of control, and crashes.
- Eye Protection: Mechanics are instructed to wear approved eye protection when performing maintenance tasks.
- Solvent Use: A critical warning is issued against using alkali- or acid-based solvents (such as rust cleaners) on the chain, as this can cause the chain to break and lead to serious injury.
- Chain Cleaning: Regular cleaning of the chain with an appropriate chain cleaner is recommended, with intervals depending on usage and riding conditions.
- Crank Arm Inspection: Riders should check for cracks in the crank arms before each ride, as cracked crank arms can break and cause falls.
- Chain Inspection: The chain should be inspected for damage (deformation, cracking), skipping, or unintended gear shifting. Any issues should prompt consultation with a dealer or agency to prevent chain breakage and falls.
- Clothing Safety: Riders are cautioned to prevent their clothing from getting caught in the chain while riding to avoid falls.
- Hollowtech II Type Cranksets:
- Inner Cover Installation: Proper installation of the inner cover is essential to prevent axle rust and damage, which could lead to falls and serious injury.
- Left Crank Arm Tightening: The two left crank arm screws must be tightened alternately in stages, not fully tightened at once. A torque wrench should be used to ensure tightening torques are within 12-14 N-m. Re-checking tightening torques after approximately 100 km (60 miles) and periodically thereafter is vital. Failure to do so can cause the left crank arm to detach, leading to falls and serious injury.
- Pedal Installation: When installing pedals, a small amount of grease should be applied to the threads to prevent seizing. A torque wrench is required to tighten pedals to 35-55 N-m. The right crank arm has a right-hand thread, and the left crank arm has a left-hand thread.
- Bottom Bracket Shell Parallelism: If the bottom bracket shell is not parallel, gear shifting performance will be negatively affected.
- Chainring/Chain Replacement: If the chain consistently comes off the gears during use, both the chainrings and the chain should be replaced.
- Hollowtech II / 2-Piece Cranksets:
- Cup Installation: When installing left and right cups, grease should be applied, and the inner cover must be installed to maintain waterproofing performance.
- Chain Type: Only recommended chain types should be used to ensure optimal performance.
- Squeaking Noise: If squeaking occurs from the bottom bracket axle and left crank arm connector, grease should be applied to the fastening section, and it should be tightened to the specified torque.
- Bearing Looseness: Loose bearings indicate a need for bottom bracket replacement.
- Chainring Combinations: Using specified chainring combinations is crucial. Other combinations can lead to poor shifting, chain jamming, and bicycle damage.
- B Type Cranksets: These cranksets are designed for use with specially designed frames.
- MTB Chain Noise: The manual provides guidance on how to adjust chain position (shifting to the next largest/smallest sprocket) to mitigate noise caused by chain contact with the chainring or front derailleur in certain gear combinations.
- Periodic Checks: Users should periodically check for excess play or looseness in fastening sections and retighten crank arms and pedals at regular intervals.
- Shift Lever Operation: The crank arm should be kept turning during shift lever operation.
- Chainring Teeth: Users are warned to be careful not to touch chainring teeth to avoid injury.
Maintenance Features
The manual provides detailed instructions for various maintenance tasks, including:
- Bottom Bracket Installation (Threaded and Press-Fit):
- Spacer Installation: Specific instructions are given for installing spacers based on bottom bracket shell width (68 mm or 73 mm for threaded, 92 mm or 89.5 mm for press-fit).
- Grease Application: Grease (Premium Grease Y04110000) should be applied to the left- and right-hand cups before installation.
- Tool Usage: The manual specifies the correct Shimano original tools (TL-FC25, TL-FC32, TL-FC33, TL-FC36, TL-FC37, TL-BB12, TL-BB13) and their combinations for installing and uninstalling bottom brackets.
- Tightening Torque: Precise tightening torques (35-50 N-m for threaded bottom brackets) are provided.
- Press-Fit Installation: Instructions include inserting the bottom bracket into the shell, using the Shimano original tool, and pressing it in by tightening with a spanner while ensuring parallel contact surfaces.
- Press-Fit Removal: Steps involve inserting the removal tool (TL-BB13), holding down the flap, and tapping with a soft face mallet until the bottom bracket is ejected. A warning is given not to reuse cups after removal as they may be damaged.
- Crank Arm Installation:
- Right Crank Arm Insertion: The right crank arm unit must be fully inserted until it touches the bottom bracket.
- Left Crank Arm Alignment: The wide groove area of the left crank arm must be set into the wide groove area of the right crank arm unit's axle.
- Grease Application: Grease (Premium Grease Y04110000) should be applied to the wide groove areas of both crank arms and the cap.
- Cap Tightening: The cap should be tightened using the Shimano original tool (TL-FC16 or TL-FC18) to a torque of 0.7-1.5 N-m.
- Stopper Plate and Screws: The stopper plate must be pushed in, ensuring the plate pin is securely in place. The two screws of the left crank arm should then be tightened alternately in stages to a torque of 12-14 N-m.
- Replacing Chainrings:
- Single Chainring (FC-M8000-1, FC-M8000-B1, FC-M7000-11-1, FC-M7000-11-B1): The marked side of the chainring should face the front, and the crank arm should be positioned as illustrated. Tightening torque for the screws is 12-14 N-m.
- Double Chainring (FC-M8000-2, FC-M8000-B2, FC-M7000-11-2, FC-M7000-11-B2, FC-MT700-2, FC-MT700-B2, FC-MT600-2, FC-MT600-B2, FC-M6000-2, FC-M6000-B2, FC-MT500-2, FC-MT500-B2, FC-M617, FC-M617-B2):
- Chainring Combinations: Only specified chainring combinations should be used to avoid poor shifting and chain jamming.
- Largest Chainring: The marked side of the largest chainring faces outward, with the chain drop prevention pin positioned under the crank arm. Tightening torque is 12-14 N-m (for M8000/M7000/MT700/MT600 series) or 16-17 N-m (for M6000/MT500/M617 series).
- Smallest Chainring: The marked side of the smallest chainring faces inward, with the alignment tab positioned under the crank arm. Tightening torque is 16-17 N-m.
- Triple Chainring (FC-M8000-3, FC-M7000-10-3, FC-MT500-3, FC-M6000-3):
- Largest Chainring: Marked side outward, chain drop prevention pin under crank arm. Tightening torque for largest/middle chainring is 10-12 N-m (for M8000/M7000 series) or 12-14 N-m (for MT500/M6000 series).
- Middle and Smallest Chainrings: Marked sides inward, alignment tab under crank arm. Tightening torque for smallest chainring is 16-17 N-m.
- Repair Chainring:
- Chain Drop Prevention Pin: Instructions are provided for chainrings that use or remove a chain drop prevention pin cover.
- Compatibility Warnings: Important notices regarding combining chainrings with standard or B specification right crank arms, and the non-reusability of removed chain drop prevention pin covers, are included to prevent chain falling or incorrect assembly.
- General Cleaning: Crank arms and bottom brackets should be cleaned with a neutral detergent. Alkaline or acidic detergents can cause discoloration.
- Bottom Bracket Washing: High-pressure water jets should not be used on the bottom bracket, as water can enter the bearing section and cause noise or adhesion.
- Chainring Cleaning: Chainrings should be periodically washed with a neutral detergent. Cleaning and lubricating the chain with neutral detergent extends its life.
- Product Guarantee: The manual states that products are not guaranteed against natural wear and deterioration from normal use and aging.
- Recommended Products: SHIMANO lubricants and maintenance products are highly recommended for maximum performance.
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