TKE TW45 - Replacing the traction sheave

66
Work on the product
Replacing the traction sheave
TK Elevator
BA, TW45 | 6231003860 | 03/2023
12. Use the formula below to calculate the backlash.
Backlash = (ME*r)/M
Fig.35 ATR_2_22_0027_0
Item Designation Item Designation
M Radius ME Measurement result
r
Radius – worm wheel, all dimen-
sions in mm
7.6 Replacing the traction sheave
WARNING
Traction sheave not resting properly on cone (is loose)!
Traction sheave tumbles and can come loose. The elevator car can move in
an uncontrolled manner through the shaft.
Do not change the dimension of the feather key, groove, cone shaft or
traction sheave bore hole under any circumstances.
Avoid damage to and contamination of the cone shaft and traction
sheave.
Secure the traction sheave with a chain or ropes.
Ensure correct installation.
1. Disconnect the power from the installation and secure it against reactiva-
tion.
2. Secure the car and counterweight against movement.
1. Remove cover plate on the traction sheave.
2. Take the load off the traction sheave.
3. Take off the ropes.
4. Remove the fastening screws with tension disc.
5. Insert the fastening screw in the tension disc the other way around.
6. Screw the threaded rod into holes for forcing.
7. Tighten threaded rods alternately.