7. Check the belt tension after the running belt has been centered.
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.
Do not over tighten the running belt. Over tightening the running belt can cause the belt to stretch
and require replacement. Continue procedure until running belt stops slipping.
8. Check running belt for centering position.
If running belt is not centered, perform steps 5 and 6.
Check 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.
Tools Required
Phillips screwdriver
Disconnect power source
1. Toggle the on/off (I/O) power switch to the off (O) position. The on/off (I/O) power switch is located
under the front end of the unit, or on the front right side panel.
2. Unplug the treadmill from the power outlet.
Shock and electrocution hazard.
• Unplug unit and let sit 10 minutes before cleaning or performing
maintenance.
• Electrical charge can remain in unit after unplugging.
• Keep water and liquids away from electrical parts.
Page 16 of 261
Cybex 770T/790T Treadmill Part Number
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