NOTE: Please be aware that this is NOT for the Helix LT.
The instructions contained in the document below illustrate how to resolve loosening and squeaking that may be encountered with your Helix® floor processor's built-in expression pedal. Line 6 recommends that this maintenance be performed by an Authorized Service Center. Please note that while opening your Helix to perform this maintenance does not void your warranty, attempting this procedure yourself is done at the risk of potentially damaging the unit.
Helix_Expression_Pedal_Troubleshooting_Instructions_Rev_A.pdf
The procedure is demonstrated in the following video:
Line 6 recommends that this maintenance be performed by an Authorized Service Center. Please note that while opening your Helix to perform this maintenance does not void your warranty, attempting this procedure yourself is done at the risk of physical harm or death and/or potentially damaging the unit.
Please note that for those of you in New Zealand/Australia, the unit is classified as a Class I appliance with an IEC mains power input. This means that if you choose to repair the unit yourself, you must have a licensed technician test and certify it as safe to use before it gets reconnected to the mains power. (NZ Electricity Act 1992, Section 80(g) and Standard AS/NZS3760:2010.)
If your Helix pedal squeaks or is loose and using the Allen wrench won't help, DON'T spray anything into your Helix. Instead, see this article's instructions and video:
Please be aware that this is NOT for the Helix LT.