5 Maintenance and Inspection
Maintenance and inspection procedures
5-129
(11) RV-4FR/7FR series (6-axes type): Inspection and replacement of J4-axis timing belt
The reference figure at inspection of the timing belt is shown in Fig. 5-21.
Fig.5-21 ： Inspection of J4 axis timing belt (RV-4FR/7FR series)
■ Inspecting the J4 axis timing belt
1) Refer to Page 100, "5.3.2 Installing/removing the cover", and remove the elbow cover and No.1 arm cover R.
2) In RV-7FR series, remove the cable guide A, B, and C.
Silicon grease is applied to the contact surface of each cable guide to reduce friction or wear caused by
movement of the cables. Do not wipe off the silicon grease.
3) Visually confirm that the symptoms indicated in Page 106, "(1) Timing belt replacement period" have not
occurred with the timing belt.
4) Refer to Page 107, "(2) Timing belt tension measurement", and confirm the belt tension.
5) Install the cable guide A, B, and C securely as before.
6) Install the elbow cover and No.1 arm cover R securely as before and finish inspection.
■ Replacing the J4 axis timing belt
For replacement of the timing belt, check the serial numbers of the robot arm and the controller and contact the
dealer.
Timing pulley B
(joint side)
Timing pulley A
(motor side)
Timing belt
J4 axis motor
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