Fanuc Robot S-420iR/120

1) Replacing J5--axis motor (M5)

1 Remove loads from the robot’s wrist such as a hand and workpieces.

3 Remove the J5--axis cover, the connector of the J5--axis motor (M5), then the plate. Cut the nylon cable tie. (See Section 8.2, ”Replacing the Cables.”)

4 Remove the bolt (M12 x 40) for mounting the motor, then remove the motor.

5 Remove the draw bolt and spline from the motor shaft.

6 Replace the motor with a new one. Also replace the O--ring (as a precaution). Reassemble the removed components. Be sure to mount the O--ring at the appropriate position. Use new motor mounting sealbolts. (In case of reusing sealbolts, apply LOCTITE No.242 to them. (Refer to section 6.1) Fasten the excess part of the cable to the plate with a nylon tie. See 8.2 for an explanation of how to lay the cable.

7 Apply grease to the reducer (Refer to section 3).

8 Perform mastering (Refer to section 5.3).

1) Replacing J1--axis motor (Fig. 6.2 (a) )

2 Remove the J1--axis motor connectors. (For the S--420i R, remove the cover from the J2 angle base.)

3 Remove four motor mounting bolts (M12×35) and then remove the motor.

4 Remove the nut and gear in order.

5 Replace the motor, and remount a new motor reversing above procedure. Polish the motor flange with oil stone. Apply LOCTITE No. 242 to the thread of the nut. Be careful not to damage the tooth surface of the spur gear. Install an O ring correctly.

6 Perform mastering (Refer to section 5.3).

2) Replacing J1--axis reducer (Fig. 6.2 (b) )

Battery in the mechanical unit replaced?

Cables in mechanical unit checked?

Each part cleaned and inspected?

Tightness of major external bolts checked?

Balancer joint bearing greased?

Grease supplied to the bearing (only for the S--420i R)?

Filter elements in the air filter unit replaced?

Sign off on the yearly robot check

1) Replacing J4--axis motor (M4)

1 Set the posture of the wrist such that no load is applied to the wrist axis.

4 Remove four bolts (M12 x 40 2pcs, M12 x 55 2pcs) for mounting the motor, then the motor.

5 Remove the nut and take out the center gear.

6 Replace the motor with a new one. And reassemble it in a reverse order. Also replace the O--ring (as a precaution). Apply Locktite No. 242 to the threaded portion of the motor shaft. Be sure to mount the O- -ring at the appropriate position. Pay special attention so as not to scratch the tooth face of the super gear.

7 Apply grease to the motor (Refer to section 3).

8 Perform mastering (Refer to section 5.3).

Upload a photo of the replaced filter element

Air filters and oil mist filter replaced at the same time

Sign off on the filter element replacement