Sentry DCC02 Installation And User Manual page 18

Motor Head Unit Installation Motor Head Unit Installation
5
With the two drive hooks aligned as shown in the previous step, gently press the
motor and the spool wheel together as shown. The motor must fit snugly against
the spool wheel. Lift the door tube back onto the platform, the stem of the motor
unit resting on the platform.
WARNING: if it does not fit, do not force it, instead acquire an
adaptor wheel and fit it to the door, or replace the spool wheel
with a SENTRY adaptor wheel.
The drive hooks are critical items and must not be damaged in any way
due to being forced to fit, or by being machined. This could lead to product
failure, resulting in potential injury, and damage to property. Machining of
the drive hooks and/or damage to them will render the warranty null and
void!
An acceptable alternative approach, is to machine material off the spoke to allow
enough clearance for the drive hooks. Please be aware that there is a limit to how
much this can be done, and in any case, a retrofit of an adaptor wheel is always
recommended.
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