Thomson
Thomson PC-Series™ Precision Linear Actuator - Installation Manual - June 2014
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5.4 Replacement of coupling on inline models with RediMount flange
The coupling may break at overload in which case it can be replaced per the instructions bellow. Make
sure when replacing a broken coupling that all other components are intact.
1. Remove cover lid (12) and loosen screws on the coupling half (11) closest to the motor and remove it.
2. Remove screws (6) and remove the motor.
3. Make sure the extension tube on the unit (1) is fully retracted (this may not be changed until the
screws (7) are tightened again).
4. Remove screws (7) and the flange plate (3), the sealings (4) and the bell house (2).
5. Looosen the lock screw on the coupling half closest to the unit (9) and remove it.
6. Push on the new coupling and make sure the parts of the new coupling (9, 10 and 11) are fully
pressed together.
7. Make sure the coupling are at the correct LC distance as listed in table T5.4.1.
8. Tighten the lock screw on coupling half as listed in table T5.4.2.
9. Make sure the sealing (4) is correctly positioned against the bell house (2) and the flange plate (3)
before tightening screws (7) according to table T6.3.1
10. Mount the motor and tigthen screws (6) according to table T5.4.2.
11. Tighten the lock screw on coupling half (11) according to table.
12. Check so that the o-ring (12) is not damaged, in which case it should be replaced, and put back the
cover lid (12).
13. Test run the unit without any load 2 - 3 cycles to see that it runs smoothly and without any noise.
T5.4.1 - Distance LC
Model
LC [mm]
PC25
10.0
PC32
7.0
PC40
14.0
T5.4.2 - Coupling half lock screw tightening torque
Model
Nm
PC25
0.85
PC32
2.00
PC40
2.00
