Understanding the Locking Mechanism Function
The dumbbell features SelectTech
®
technology. This has a locking mechanism designed to make sure of correct selection of the weight
plates and to hold the weight plates safely during the workout.
Fully understand the function of this mechanism and do tests of the mechanism regularly to make sure it operates correctly.
The locking mechanism supplies two key functions:
1. The mechanism will only let the adjustment knobs turn when the dumbbell handle fully engages the dumbbell base. The mecha
-
nism prevents deselecting (dropping) weight plates from the dumbbell when it is NOT in the dumbbell base.
2. The mechanism will lock the dumbbell handle to the base if the adjustment knobs do not fully engage the weight plate selection.
The mechanism prevents partial selection of the weight plates in which the locking pin is not fully engaged and does not fully hold
the plates.
Testing the Locking Mechanism Function
1. With the dumbbell handle set in the dumbbell base, turn the adjustment knobs
to the number 2. When you fully and correctly make the number selection, you
can feel the adjustment knob move into a notch (known as a detent). You will
also hear a small, but audible, click at the detent location for each number.
2. Pull the handle vertically from the base and all the weight plates will stay in
the base.
3. With the handle removed from the base, hold one adjustment knob with your
other hand and carefully try to turn the knob. The knob should not turn. A
locking pin in the mechanism engages the rotational assembly when the unit
is removed from the base. Do this test with all adjustment knobs.
Do not use too much force to try to turn the locked adjustment knob. Too
much force can damage the locking mechanism.
4. After you make sure that the locking mechanism operates correctly, put the
dumbbell handle back and set it fully into the base assembly.
5. With the handle back in the base, turn the adjustment knob to a position that
is between the numbers 2 and 20. This is an incomplete weight selection
where the adjustment knob has not fully made a weight selection and the knob is between the selection detents (clicks).
6. With the selection knob in this incorrect position, carefully try to lift the handle to remove it from the base. You should find that the
handle is locked to the base and cannot be removed with light pressure, as it usually can.
7. Change the adjustment knob to a full and correct weight selection and make sure that the dumbbell handle can again be removed.
8. Repeat this test for all adjustment knobs.
9. Make sure the dumbbell handle assembly is properly tightened. To do this, set the adjustment knobs to 4 pounds and remove the
handle assembly from the base. Hold the adjustment knobs, and push and pull the knobs to and away from the handle grip. The
knobs should not move freely and all of the selection discs should feel tightly connected.
10. The test of the locking mechanism function is now complete. We suggest that you repeat this test monthly to make sure that the
locking mechanism operates correctly.
Do not engage the locking mechanism and use the handle to try to lift the dumbbell and base together. To lift the dumbbell and
base together, engage the locking mechanism and hold the base assembly.
If the dumbbell locking mechanism operates unsatisfactorily in the test procedure above, do the following:
1. Stop use of the product immediately until approved service is available.
2. Contact your local Bowflex
®
distributor or vendor for service.
Operation
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