Owner's manual

5. Maintenance inspection
44
5.7 How to Inspect the Timing Belt
Visual inspection is done by removing the belt cover and pulley cover. Since the timing belt wear
largely depends on the operational requirements, as a rule, replacement period can not be
determined. Generally speaking, the life span of the timing belt is the life span of a couple hundred
thousand revolutions. As an actual replacement period standard, the timing belt is replaced when
the following symptoms are confirmed.
When belt replacement is necessary, please contact our technical service department or sales
representative (due to detailed specification differences, please always contact IAI when replacing
the timing belt).
x When the gear and belt area show obvious friction.
x When swelling occurs as a result of oil adhesion.
x When damages such as a crack occurs on the belt gear and back side.
x When the belt breaks.
When installing an actuator, ensure as much working space as it can be secured to perform a
work to remove the screws holding the pulley cover and to remove the belt cover so the timing belt
can be inspected and adjusted.
The table below shows the types of timing belt that we use.
Model Belt-Drive Type Timing Belt Supplier
S Type S3M, 18-wide S3M24, 15-wide Bandoh Kagaku, Inc.
M Type S5M, 25-wide S3M339, 20-wide Bandoh Kagaku, Inc.