Bowflex SelectTech BD552 Dumbbells Dumbbells and Stability Ball - Manual (Page 8)

Operation
understanding and testing the locking mechanism function
The Bowflex ® SelectTech ® Dumbbell features a patent pending locking mechanism designed to ensure proper and complete
selection of the weight plates as well as to ensure weight plate retention during the workout. It is important that you fully
understand the function of this mechanism and periodically test it to ensure it is properly functioning.
function
The locking mechanism provides two key functions:
1. The mechanism will only allow the adjustment knobs to be rotated when the dumbbell handle is completely inserted and
engaging the dumbbell base.
2. The mechanism is designed to lock the dumbbell handle to the base if either adjustment knob is not fully engaging the
selected weight plates.
purpose
The locking mechanism serves two important purposes:
1. The mechanism will prevent deselecting (dropping) weight plates from the dumbbell when it is NOT in the dumbbell base.
2. The mechanism will prevent partial selection of the weight plates in which the plates are not fully supported and the
locking pin is not fully engaged.
D
All locking tabs (D) must point outward.
D
D
Correct—tabs (D) point outward. Incorrect—tab reversed.
Owner’s Manual
8