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Note: Your machine may not match the image. For reference only.

1. Remove the Top Shroud, Left Shroud and Right Shroud from the

Main Unit. Refer to the “Replace the Shrouds” procedure.

2. To test the Drive Belt tension:

• Push the Drive Belt downward at the midpoint (M) between the

pulleys and measure the distance. The Drive Belt should have

only 0.25” (0.64 cm) of give. See Figure 1.

Or:

• Hold the edges of the Drive Belt at the midpoint (M) and twist it

(see Figure 2). It should turn only 90 degrees

(1/4 turn, to vertical).

If the tension is correct, go to Step 6.

If the tension is too loose or too tight, adjust the position of the

Flywheel. Continue to Step 3.

3. To loosen the Flywheel hardware (A), use a 15 mm open end

wrench to hold the nut on one side steady and loosen the nut on the

opposite side with a 15 mm socket and wrench.

4. Move the Flywheel in the Main Frame bracket as necessary to

adjust the tension. Hold it in position and tighten the hardware.

Note: This step may require two people.

To tighten the Flywheel hardware, use a 15 mm open end

wrench to hold the nut on one side steady and tighten the nut on

the opposite side with a 15 mm socket and wrench.

5. Carefully turn the crank arms and check the movement of the drive

belt. The Crank Arms and Flywheel should move as one.

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turn the Drive Pulley.

Adjust the belt tension again if necessary.

6. Reassembly is the reverse procedure.

Disconnect all power to the machine before you service it.

NOTICE: It is necessary to remove the Shrouds for this procedure. Refer to the “Replace the Shrouds” procedure.

0.25”

0.64 cm

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Figure 1

Figure 2

Nautilus R614 Service Manual

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