OPERATING MANUAL DAF290 MAINTENANCE
ThyssenKrupp Aufzugswerke GmbH
7.5 Traction sheave replacement
Disassembly:
• Disconnect the power from the installation and secure the car and
counterweight
• Remove traction sheave cover or rope fixing beam
• Ease load on traction sheave; lay down cables
• Secure traction sheave with lifting gear
• Measure and note dimension of pretensioned brake springs
• Relieve pressure on tension springs by unscrewing the screws until the
traction sheave is free
• Unscrew rope fixing beam
• Unscrew disc on motor shaft and turn round disc
(the side of the disc that has been turned free must be visible)
• Insert screws in outer hole circle of the disc in the traction sheave hub
• By tightening the screws diagonally and evenly, remove the traction
sheave from the shaft.
If the removal distance is insufficient, place a spacer with a thickness of
between 2 and 6 mm between disc and shaft end.
Installation:
• Clean shaft end and traction sheave bore; do not under any
circumstances alter dimensions of feather key, groove, shaft or bore.
• Do not apply grease or oil to the shaft and bore.
• Carefully mount new traction sheave with lifting gear on tapered shaft
end of the motor shaft.
• Align the feather key and groove to one another.
• Fit traction sheave on motor shaft, taking care with the brake shoes!
• Screw disc onto motor shaft using inner hole pattern. The end face that
has been turned free must be aligned to the traction sheave.
• Secure screws with Loctite type 241 against accidental release and
tighten diagonally and evenly in a clockwise direction in several steps.
• Check the lateral alignment of the brake linings in relation to the brake
disc support. In the case of misalignment, disassemble brake shoe and
align linings to brake surface centre by rearranging the spacer washers
on the brake shoe pin. (Washer thickness = 1 mm.)
• Set the press-on force of the springs, brake shoe stroke 0.3 mm and
brake test switches.
• Install traction sheave cover or rope fixing beam.
Important: If installed incorrectly, the traction sheave can be released.
Ensure screws are secure and tightening torque is correct!
See table in the Appendix.
Product has been
replaced
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