ABB IRB 640, Product Manual

Page: 61 / 152

Axis 2 Repairs
18 Product Manual IRB 640
Tightening torque:
Screws for motor, item 1.31: 50 Nm
Screw for gear, item 1.30: 70 Nm
3.2 Replacing the gearbox
Refer to foldout 5.
Dismounting:
1. Remove motor as in Chapter 3.1, Replacing motor.
2. Unscrew screws <1.38.2> and remove the motor socket <1.38.1>.
3. Mount 2 guide pins, M12, through the gearbox.
4. Loosen the screws <1.5> and <1.7>.
5. Pull the gearbox <1.3> out, suspended on the guide pins.
Mounting:
6. Clean the surfaces in the frame, lower arm and gearbox.
7. Mount 2 guide pins, M12.
8. Mount friction rings <1.16, 1:37> and O-ring <1.4>.
9. Put the gearbox <1.3> on the 2 guide pins and place the friction ring <1.16> on to
the gearbox.
10. Mount screws <1.5> and <1.7>, lubricate with Molycote 1000 and tighten screw
<1.7> with 300 Nm and screw <1.5> with 120 Nm.
11. Mount O-ring <1.14>.
12. Suspend the motor socket on the 2 guide pins.
Note the position of the magnetic plugs.
13. Mount screws <1.38.2>, lubricate with Molycote 1000 and tighten with a torque of
120 Nm.
14. Mount motor as described in Chapter 3.1, Replacing motor.
Tightening torque:
Screw joint gear box/lower arm, item 1.7: 300 Nm
Screw joint gear box/lower arm, item 1.5: 120 Nm
Screw joint motor socket/frame, item 1.38.2: 120 Nm