OPERATING MANUAL TW63 MAINTENANCE / SERVICE
ThyssenKrupp Aufzugswerke GmbH
7.3 Replacing brake shoes
Note: With a remaining lining thickness of less than or equal to 3 mm or if the
linings are damaged (e.g. glazing), the brake linings must be replaced.
Before starting work, secure the counterweight and elevator car; switch off
the power to the installation.
Loosen the nuts on the tension springs and remove.
Remove the bolt locking screw and brake block pins.
Remove one brake block; mount the armature base plate on new brake
blocks. In doing so, lightly grease the rubbing surface between the
armature base plate and armature screw.
Check the ease of movement of the armature base plate; adjust if
necessary. It should be possible to move the armature base plate with low
resistance on the screw.
Secure setting by tightening the lock nuts.
Install the pre-assembled brake blocks; do not tighten the nuts on the
tension springs.
Important: The thread on the brake block pins must be on the outside on
installation, as the pin can otherwise no longer be pulled out.
Pretension the brake tension springs to a maximum of 13.5 mm. (approx.
11 revolutions of the lock nuts)
Set the brake block stroke by adjusting the armature base plate screw on
the brake block. The brake block stroke should be 0.3 mm + 0.1 mm,
measured to the middle of the brake disc.
Change and set the second brake shoe in the same way.
After replacement of the brake blocks, run the lift with return and observe
whether the both brake blocks open uniformly.
Check the stroke paths and deceleration; if required, adjust.
Fig. 7.3.1: Brake shoe setting, illustration without motor and traction sheave
1 Worm shaft
2 Brake disc
3 Magnetic clamp
4 Cover ring
5 Armature base plate
6 Armature base plate
screw
7 Brake shoes
8 Dial gauge
9 Tightening screw
Stroke 0.3 + 0.1 mm
1
2 3
4
5
6
7
8
9
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