Understanding.and.testing.locking; Mechanism.function; Purpose; Testing Proper Locking Mechanism Function - Nautilus SELECTTECH 552 Owner's Manual

Understanding and testing the locking
mechanism function
The Nautilus SelectTech Dumbbell features a patent pending locking
®
®
mechanism designed to assure 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.
Given the importance of this locking mechanism, it is critical that you
understand how it operates and how to periodically test it to make sure
it is functioning correctly.

Testing proper locking mechanism function

1. With the dumbbell handle set in the
dumbbell base, turn both adjustment
knobs to the number 5. You will know
you have fully and correctly selected
the number when you feel the
adjustment knob settle into a notch
(known as a detent). You will also
hear a slight, but audible, clicking
noise that corresponds with the
detent locations for each number.
2. You should be able to withdraw the handle from the base
leaving all the weight plates behind.
3. With the handle removed from the base, grab one adjustment
knob with your other hand and gently attempt to turn the knob,
the knob should not rotate. A locking pin in the mechanism
will have engaged the rotational assembly when the unit was
withdrawn from the base. Perform this test with all adjustment
knobs.
selecttech locking mechanism
®
W A R N I N G
Do not use a great deal of force in an attempt to turn
the locked adjustment knob. Excessive force may
damage the locking mechanism.
4. After confirming the proper function of the locking mechanism
D A N G E R
as described above, return and fully insert the dumbbell handle
back into the base assembly.
5. With the handle back in the base,
turn the adjustment knob on one side
to a position that is in-between the
5 and 7.5 number. This represents an
incomplete weight selection where
A T T E N T I O N
the adjustment knob has not fully
selected a weight and the knob is
in-between the selection detents
(clicks).
6. With the selection knob in this improper position, gently
attempt to lift up on 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 can normally.
IMMEDIATE ACTION REQUIRED
7. Return the improperly selected adjustment knob to a full and
proper weight selection and assure that the dumbbell handle
can once again be removed.
C A U T I O N
8. Repeat this test for all adjustment knobs.
9. Assure the entire dumbbell handle assembly is properly
tightened. Do this by setting the adjustment knobs to five
pounds and removing the handle assembly from the base.
Grab both adjustment knobs and very slightly push and pull the
knobs toward and away from the handle grip. The knobs should
not exhibit free play and all of the selection discs should feel
tightly connected.
10. You have now tested the function of the locking mechanism.
We suggest you repeat this test periodically (once a month) to
confirm the proper function of the locking mechanism.
Nautilus SelectTech Owner's Manual
® ®