Fanuc Robot S-420iW/175

Ventilation plug for J5-axis removed

New grease applied from the grease inlet until it comes out from the grease outlet

Plug at the grease outlet remounted

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 the J2/J3--axis motor (M2/M3)

i) Standard type (See Fig. 6.3(a))

2 Suspend the J3--axis arm with a rope. Also, suspend the J3--axis link for safety. (See Fig. 6.3(c).) (For S--420iR, suspend it as shown in Fig. 6.3(d).)

4 Remove the mounting bolts (M12×40) of the motor to be replaced, and remove the motor to be replaced.

5 Remove the nut, the input gear and the draw bolt in order.

6 Replace the motor, and remount a new motor reversing the above procedure. Polish the motor flange with an oil stone. Apply LOCTITE No. 242 to the draw bolt and the motor thread. Mount the O--ring correctly. Use new motor mounting sealbolts. (In case of reusing sealbolts, apply LOCTITE No.242 to them. (Refer to section 6.1) Be careful not to damage the tooth surface of the input gear.

7 Replenish the grease (Refer to section 3).

Warning: Ensure to remove loads from the robot’s wrist such as a hand and workpieces before starting.

Remove the J5--axis cover, the connector of the J5--axis motor (M5), then the plate. Cut the nylon cable tie.

J5--axis cover, connector and plate removed?

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

Remove the draw bolt and spline from the motor shaft.

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.

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?

Bearing greased (only for the S--420i R)?

See Section 3.2 for greasing the bearing.

Filter elements in the air filter unit replaced?