Cybex 425T Treadmill Owner’s Manual
Preventive
Maintenance
Page 4-3
Figure 1
Running Belt Maintenance
Belt and Deck — Wipe the belt surface and the deck area with a clean dry towel to minimize the effect
of friction between the deck and the running belt. This should be done often to prevent premature wear of
the deck, running belt, and the drive motor system. See the Service Schedule at the end of this chapter.
The running belt may become loose and slip on the drive roller with each foot plant. If it does, follow
the Tensioning and Centering the Belt procedure below. See the Service Schedule in this chapter for a
minimum schedule for checking the belt tension.
Tension and Center the Belt — If the belt is slipping under each step perform this procedure:
Tools Required
3/4” Socket wrench•
1. Tension the belt.
A. Use a 3/4” socket wrench to turn each bolt 1/2 turn clockwise. See Figure 1. NOTE: Be sure to
adjust each bolt equally on each side.
B. Press the Quick Start key.
C. Press the Speed + key to bring the speed up to 3.5-4 mph (5.6-6.4 kph). Allow the treadmill to
run for a minute.
D. Observe the belt to be sure it stays centered. If it is not centered follow step 2.
E. Walk on the belt to see if it still slips. If it does restart this procedure at step 1 A. If you have to do
this procedure three times and it still slips call Cybex Customer Service. Follow the next step to
be sure the belt is centered.
NOTE: Be careful not to over tighten the belt. Over tightening the belt can cause the belt to stretch and
require replacement.
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