Instructions / Assembly
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© 1/2017 ECHO Inc.
CS-400 SAFETY
If the chain does not stop immediately, return the saw to your 
authorized dealer for repair.
Note: 
• For practice, while cutting a small tree, push the lever forward to lock the 
brake.
• Confirm that the brake works properly before each use.
• If the chain brake is clogged with wood chips, function of the brake may 
deteriorate. Always keep the device clean.
• Do not increase engine RPM's while the chain brake is locked.
The installation of a chain brake may be mandatory by law or as stipulated by 
insurance regulations in your area of operation. You should inquire through local 
government offices, your employer or your local dealer to ensure that your chain 
saw conforms to the required safety standard.
Chain brakes have been designed and tested to comply with international safety 
standards as follows.
USA: ANSI Standard B175.1 Safety Requirement for chain saws
ANSI Standard B175.1 stipulates that the brake shall stop the chain 
0.12 seconds at an engine speed of 13,500 r/min. It is the 
responsibility of the owner/operator to ensure that the brake is 
serviced, adjusted and tested strictly in accordance with the 
instructions as detailed here in order to ensure that the brake 
performance is maintained in compliance with the Standard 
B175.1. 










