Nautilus Be Strong Commerical T912 User manual

ALWAYS TURN OFF THE FITNESS MACHINE AND
UNPLUG THE POWER CORD FROM THE WALL OUTLET
BEFORE REMOVING OR INSTALLING PARTS TO
AVOID THE RISK OF ELECTROCUTION, SHOCK OR
MECHANICAL INJURY.
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Nautilus®T7Series and T912 Treadmill Service Bulletin
This Service Bulletin is issued due to the walking belt on the Nautilus® T7 Series Treadmills and
the T912 Treadmill jerking at low miles per hour (mph) workouts.
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P/N: 001-7193 (9/28/07) Nautilus®T7 Series & T912 Treadmill Service Bulletin
1
©2007. Nautilus, Inc. All rights reserved. Nautilus and the Nautilus Logo are either registered trademarks or trademarks of Nautilus, Inc.
Removing the motoR CoveR
Step 1-1: Unscrew two screws located at the bottom of the
right and left Upright weldment (Figure 1). This
makes removal of the Motor cover easier.
Step 1-2: Remove the (2) attaching Motor cover screws
and carefully slide the cover outward and up.
(Figure 2).
Adjusting the “iR ComP” PotentiometeR
Step 2-1: Locate the "IR Comp Pot 3" potentiometer just to
the right of the Transformer "TR1" (Figure 3).
Step 2-2: Place a flat head precision screwdriver into the
center of the potentiometer and slightly turn
counter-clockwise (Figure 4).
Step 2-3: Step up onto the Treadmill and press "Quick
Start" to start the Walking belt moving.
Parts affected:
• MOTOR CONTROLLER, DC SM41093 • MOTOR CONTROLLER, DC 180V SM41338
• MOTOR CONTROLLER, AC 115V SM41094 • MOTOR CONTROLLER, AC 230 VAC SM41313
Tools Needed:
• PHILLIPS SCREWDRIVER • PRECISION FLATHEAD SCREWDRIVER
• CORDLESS DRILL WITH PHILLIPS BIT
Figure 1
Figure 2

Nautilus®T7Series and T912 Treadmill Service Bulletin
P/N: 001-7193 (9/28/07) Nautilus®T7 Series & T912 Treadmill Service Bulletin
2
©2007. Nautilus, Inc. All rights reserved. Nautilus and the Nautilus Logo are either registered trademarks or trademarks of Nautilus, Inc.
Nautilus, Inc., World Headquarters, 16400 SE Nautilus Drive, Vancouver, Washington, USA 98683
1-800-NAUTILUS www.nautilus.com
Step 2-4: Start walking. The belt SHOULD NOT jerk as
you are walking.
Step 2-5: If the Walk belt continues to jerk repeat
Steps 2-2 thru Step 2-4 until the jerking stops.
NOTE: Turning the potentiometer clockwise increases the
Motor current.
Turning the potentiometer counter-clockwise
decreases the Motor current.
When the Walk belt is surging it is recommended to
turn the potentiometer counter-clockwise.
Step 2-6: Verify the machine passes the "CALIBRATION"
test using the followings steps:
1. With machine in the dormant mode, press the
[Start] and [Enter] keys simultaneously, until the
word "CAL" appears on the display.
2. Press the [Start] key and "SELECT UNITS" is
displayed.
3. Press [Enter], then the [Start] key to begin the
calibration process.
4. The console will indicate if the machine "Passes" or
"Fails".
Figure 3
Figure 4

[STOP]
5. Press [STOP] to exit.