nautilus treadmill: Removing the Walking Deck

3.1  Remove the right and left Rubber Side Extrusion exposing the Side Rail Bolts (see Figure 3.1).

3.2  Remove the right Side Rail Bolts and Side Rail exposing the Deck Bolts, then repeat for the left side (see Figure  3.2).

3.3  Remove the left side Deck Bolts, then repeat for the  right side (see Figure 3.3).

3.4  Lift and slide the Walk Deck out and replace if needed  (see Figure 3.4).

3.5 Reverse steps when re-installing the Walk Deck.

IMPORTANT:  When reattaching the Walk Deck with the Deck Bolts, apply a small amount of Loctite #243 on the threads and torque to 15 in. lbs

Replacing the Walk Belt (Nautilus) whenever the walk belt is still too loose after adjusting the tension or when the belt is worn or frayed

Perform this procedure whenever the walk belt is still too loose after adjusting the tension or when the belt is worn or frayed.

DO NOT CUT THE BELT—DOING SO WILL CAUSE THE REAR ROLLER TO FALL AND SNAP THE ALIGNMENT PINS ON THE END CAP.

1.   Remove the Treadmill Hood
1.1  Turn the treadmill circuit breaker off, and unplug the power.
1.2  Remove the Front Trim, Right Lower Cover, Left Lower Cover, and Top Motor Covers.

2.   Remove the Rollers

2.1  Remove the left and right end caps (see Figure 2.1 and 2.2).

2.2  Carefully slide the roller out from the machine (see Figure 2.3).

2.3  Remove the Kick Plate and four (4) screws (see Figure 2.4).

2.4  Remove the Pivot Bolt on the left and right side of the Upright Weldment (see Figure 2.5).

2.5  Remove the screw from the Front Roller Retaining Bracket on the left and right side, then remove the brackets (see Figure 2.6).

2.6  Remove the Bolt and Tensioner assembly from the frame (see Figure 2.7 and 2.8).

2.7  Slide the Front Roller over to the left, then use the belt to lift and slide out the roller from the
machine (see Figure 2.9).

Adjusting belt tracking (Nautilus) whenever the treadmill belt moves to one side or the other.

Perform this procedure whenever the belt moves to one side or the other. Stay off the belt when adjusting  the tracking.

1. Start the treadmill at minimum speed and grade.
2. Increase speed to six (6) mph, and make the following adjustment:

2.1. If the belt moves to the right, turn the right adjustment bolt 1/4-turn clockwise.
2.2. If the belt moves to the left, turn the left adjustment bolt 1/4-turn clockwise.

3.  After making an initial adjustment, run the treadmill for five (5) minutes and observe how the
belt tracks. If the belt continues to move away from the center, adjust the appropriate side until
properly centered.

Adjusting Belt Tension on Nautilus Gym Treadmills

Adjust the belt tension whenever the belt slips or moves unsteadily during operation by following the
steps below:
1.  Start by loosening the two (2) adjustment bolts (see Figure 1).

2.  With the walking belt loose, place two marks 35 inches (89 cm) apart on each side of the belt
near the edge. The belt must be loose enough for you to move it from side-to-side on the front or
rear roller (see Figure 2).

3.  Turn the adjusting bolts clockwise by equal amounts until the marks are between 35-3/16 inches
and 35-5/16 inches apart. Proper tension for the walking belt is between .5%–.6%. This should
be about six full turns of each adjustment bolt from the point where the belt begins to stretch.
Important: Do not exceed 35-5/16 inches.

DO NOT OVERTIGHTEN THE WALKING BELT. DO NOT TORQUE ADJUSTMENT SCREWS BEYOND 80 IN-LBS (9 N-M) MAXIMUM.  OVERTIGHTENING THE BELT WILL REDUCE BELT LIFE AND DAMAGE THE ROLLER BEARINGS.

4.  Test the belt by running on the belt at about four (4) mph.  Hold the handrail lightly and resist the belt movement with your feet.

DO  NOT  USE  ALL  YOUR  WEIGHT  TO  RESIST  THE  BELT  MOVEMENT.  TOO  MUCH RESISTANCE APPLIED TOO LONG (MORE THAN TWO SECONDS) MAY SHUT DOWN THE SYSTEM. (VARIOUS ERROR MESSAGES WILL APPEAR IF THIS OCCURS. CYCLE POWER TO RESUME NORMAL OPERATION.)

5.  If you feel the belt slip on the front roller, increase the tension of each adjustment bolt by 1/2 turn
and re-test. If you feel the belt slip again, check the tensioner adjustment.

Suggested maintenance for Nautilus treadmills

Daily Treadmill Maintenance

• Inspect the power cord and walking belt for wear.
• Check the position of the walking belt. Verify it is not rubbing against the frame. The belt should be
evenly spaced on the deck within 0.25 inches of each side rail. Adjust the belt if necessary.
• Check the optional side handrails to ensure they are fastened securely.
• Remove potential hazards from the treadmill area.

Cleaning Treadmill
Keeping the Nautilus ®  Commercial series T9 treadmill clean on a regular basis will help to improve
operation and increase the lifespan of the components.

Daily
•  Keep the treadmill and controller free of dust and debris. Use a damp sponge to wipe the exteriors
and walking belt; do not soak surfaces. Dry all surfaces thoroughly.

Weekly
•  Elevate the treadmill to maximum incline and vacuum the floor under it to prevent excess dust and
dirt from interfering with operation.
•  If the magnetic key is being used, check it for rust. If you detect rust, replace the magnet. Rust on
the magnetic key will cause power-up problems.

Treadmill Interior

Depending upon the treadmill environment, dust and or lint can accumulate under the hood. Clean the
interior of the treadmill following the procedure below:

1. Turn the treadmill circuit breaker off, and unplug the treadmill power cord.
2. Remove the two (2) screws on the treadmill hood.
3. Lift off the hood.
4. Clean inside the unit.
5. Reinstall the hood and the two (2) screws.
6. Plug in the treadmill power cord, and switch on the treadmill circuit breaker.

Model T912 / T914 / T916 by Nautilus. Viewing Maintenance Information | Engineer mode for treadmills

Treadmill Model T912

The total time and distance the treadmill has been in use can be viewed using the Maintenance Screens.

This information can help you schedule treadmill maintenance and check treadmill usage.
To view the treadmill’s  total Run-time and total Distance information:

1. Press and hold ENTER and STOP keys on the console for at least 3 seconds.
2. Use the INCLINE UP/DOWN keys to scroll to ConF selection.
3. Press the QUICKSTART key.
4. Use the INCLINE UP/DOWN keys to scroll to view TOTAL HOURS and TOTAL MILES.
Model T914 & T916
In addition to the total time, the distance the T914 or T916 treadmill has been in use can be viewed using
the Machine Status console codes.
To view the treadmill’s run-time information:

1.  Press the SPEED UP key on Ergo Bar, then 4, ENTER on the console.
2. The words "Machine Status" will be displayed.
3. Press the SPEED UP key on Ergo Bar, and scroll to "Run Hours".
4. The current Run Hours will be displayed.
5. Press the CLEAR key to exit. 
To view the total distance the treadmill has been used:
1.  Press the SPEED UP key on Ergo Bar, then 4, ENTER on the console.
2. The words "Machine Status" will be displayed.
3. Press the SPEED UP key on Ergo Bar and scroll to "Distance".
4. The current Distance in the current machine units (Miles/KM) will be displayed.
5. Press CLEAR to exit.

Routine Maintenance Schedules
Performing routine maintenance will help prevent unnecessary wear to the treadmill and/or injury to the user. The maintenance schedules are meant only to serve as a guide. Depending on where and how the treadmill is being used, more frequent routine maintenance may be required.

Treadmill controllers: replacing old Astek models (TD700/800/1400/1600/1600N) with new models TD300/350/1800

Main difference between the old and new range of AsTek board is that due to Erp (Energy Saving) regulations, the external transformers have been removed.

OLD CONTROLLER (TD700 REV. 1.2 REV 1.4, TD1400, TD800, …)

NEW CONTROLLER (TD350/TD500)

OLD CONTROLLER (TD 1600 – TD 1600N)

NEW CONTROLLER (TD1800)

ORIGINAL CABLING WITH OLD CONTROLLERS