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Center the belt.
The lateral position of the running belt is correctly centered when the Cybex logo is centered between
the inside edges of the two belt tracking slots. If the Cybex logo is not centered between the belts
tracking slots, center the running belt with the following procedure.
1.
With the treadmill running at 5 mph (8 kph) observe the Cybex logo position relative to the belt
tracking slots.
While centering the belt choose one bolt to adjust. Do not adjust both bolts.
2.
Use a 3/4" socket wrench to tighten the rear roller bolt on the side of the treadmill toward
which the running belt is moving. For example: If the running belt moves to the right of the
belt tracking holes, tighten the bolt on the right side of the frame, tighten about 1/2 of a turn
(clockwise) and wait 30 seconds. If the running belt does not move back to the center of the
belt tracking slots, make another adjustment to the same bolt. Once the running belt has been
adjusted closer to the center of the belt tracking slots, use about 1/4 of a turn until the running
belt has been stabilized.
3.
After the running belt has been centered, check the belt tension again. Make sure the running
belt tension is tight enough so that the running belt does not slip or hesitate when stepped on.
Walk on the treadmill at 3.5-4 mph (5.6-6.4 kph) and every 4th to 5th step throw your weight
into your step to feel if the running belt is slipping. If slipping is felt, confirm it is the running
belt slipping and not the drive belt. With the hood cover removed, observe movement at the
drive belt and front roller.
4.
If the drive belt is slipping, replace drive belt. Contact Cybex Customer Service.
5.
If the running belt does slip, use a wrench to equally tighten both rear roller adjustment bolts
1/2 of a turn (clockwise). Adjust the running belt until no further slipping is felt.
Checking the Running Belt and Deck Surfaces — The running belt and deck should be checked
periodically for any excessive wear. In an effort to make sure that the running belt operates properly,
visually inspect the belt often to make sure that there are no tears or fraying in the belt material. The
running belt should be replaced every 15,000 miles (24,140 km). The running deck should be flipped
every 15,000 miles (24,140 km) and replaced every 30,000 miles (48,280 km). A service prompt will
appear at this interval and the parts will need to be replaced.
Cybex 770T-CT Treadmill Service Manual
Running Belt
Belt Tracking Slots
56
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