Bowflex 220 DUMBBELLS Service Manual page 15

TroubleshooTing flowcharTs
ND-552
Dumbbell Knob will Not Lock when out of Base
SelectTech Dumbbell
Trouble Shooting
Explanation: The SelectTech Dumbbell features a locking mechanism that will automatically lock the
adjustment knob and keep it from rotating when the dumbbell is removed from the base. This will ensure
that the weight plates will not be "de-selected" causing a plate to drop out. It is very important this
mechanism function correctly.
Problem: User is able to rotate the handle when dumbbell is removed from the base.
The following information will help you determine what may be causing the problem, how to resolve it
and to return the unit to proper functioning condition.
With the dumbbell handle sitting in the base, select 5 lbs on
each adjustment knob. Remove the dumbbell handle from
the base. No plates should be attached at this time. With
the dumbbell out of the base attempt to rotate one of the
adjustment knobs, repeat step for the other side
Knobs will not rotate
With thumb or forefinger manually
depress the plungers on the bottom of
the dumbbell. Do not rotate the
adjustment knobs while depressing the
plunger. Depress and release the
plungers several time each. Confirm that
the plunger will depress and
automatically return with a smooth
Plunger seems to operate correctly
With the handle returned to the base, turn the adjustment knobs to the 7.5 lbs
setting. Carefully pick up the dumbbell no more than two inches. Attempt to turn
both of the knobs while the dumbbell is elevated from the base. The knobs should
not turn on either side. Carefully repeat this step for each weight setting on each
side. Do not attempt this test with the dumbbell elevated above the base more
than two inches when it is set to 7.5 lbs or more.
Nautilus Health & Fitness Group
12/1/2003
operation
Knobs did not rotate at any setting
Dumbbell Knob Will Not
Lock When Out Of Base
Knob will rotate
Replace Handle
Return handle to Nautilus for inspection
Plunger will not operate smoothly or is sticking
Knob rotated during test
Handle operating correctly
11