We have followed a similar philosophy to the E-3120 and have built in a replaceable bush for the E-4660 to the hub arm.
DC21 are pleased to offer the Serenity Wind spring tube upgrade with all E-3120 and E-4660 models. These spring tubes come with a 5 year insurance backed limited warranty.
An upgraded coupling that is designed to prevent secondary damage in the event of flex plate failure.
Replaceable bush for the E-4660 hub arm.
Please feel free to contact us if you would like to know more about our highly competitive endurance wind turbine upgrade and repair services.