Fanuc Robot S-420i

Warning: This lubrication process requires trained personnel with PPE!

Select the parts where grease was replaced

Cross-Roller Bearing Lubrication

Was the cross-roller bearing greased?

Required Positions for Greasing

Enter the positions where grease was applied as per item 3.2

Sign off on the robot lubrication

1) Replacing J6--axis motor (M6)

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

2 Turn off the power at the position of J5=--90 degrees.

3 Remove the cover, motor cover and cable connectors.

4 Remove J5--axis cover 2, a plate, a grommet and a clamp. (Do not remove plate and Teflon sheet attached to the J5--axis cover 2).

5 Remove rubber block mounting bolts and take out the cable.

6 Remove four bolts (M8×22) for mounting themotor, then remove the motor.

7 Remove the nut, input gear and the draw bolt.

8 Replace the motor with a new one. Reassemble the removed components. Polish the motor flange with oil stone. 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 input gear. Use new motor mounting sealbolts.

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).

Air filter’s gauge indicates zero

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

Battery in the mechanical unit replaced?

Cables used 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)?

See Section 3.2 for more details on greasing the bearing.

Filter elements in the air filter unit replaced?