Replacing The Traction Sheave - ThyssenKrupp DAF380 Operating Manual

O M
PERATING ANUAL
7.7

Replacing the traction sheave

Disassembly:
Disconnect the power from the installation and secure it against
•
inadvertent activation
Secure the car and counterweight
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Remove traction sheave cover
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Ease load on traction sheave; lay down cables
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Secure traction sheave with lifting gear
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Measure the dimension of the pretensioned compression springs on the
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brake and note down the value
Relieve pressure on compression springs by unscrewing the tightening
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screws until the traction sheave is free
Unscrew the disc (Fig. 2.1, item 2) on the motor shaft
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Lightly screw in the disc with screws in the outer circle of holes of the
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disc at the traction sheave hub
Place a spacer of approx. 5 to 10 mm thickness between the shaft end
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and the traction sheave. The dimension of the spacer must be such that
it does not protrude beyond the front shaft face.
By tightening the screws diagonally and evenly, remove the traction
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sheave from the shaft.
Use lifting gear to take off the traction sheave.
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Installation:
Clean shaft end and traction sheave bore; do not under any
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circumstances alter dimensions of feather key, groove, shaft or bore.
Do not apply grease or oil to the shaft and bore.
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Carefully mount new traction sheave with lifting gear on tapered shaft
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end of the motor shaft.
Align the locations of the feather key and groove in relation to one
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another.
Fit traction sheave on motor shaft, taking care with the brake blocks!
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(operate the brake release lever if required)
Screw on a disc on the inner circle of holes on the motor shaft.
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New microencapsulated screws with tightness 8.8 are to be used.
Place detent edged washers under the screws to secure against
involuntary loosening.
Use a torque wrench to tighten screws evenly and alternately clockwise
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in a number of revolutions to the prescribed torque. See Table 9.
Check the lateral alignment of the brake linings in relation to the brake
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disc support. In the case of misalignment, disassemble brake shoe.
Adjust the spacer washers on the brake shoe pin to align the linings to
the centre of the brake surface. (Washer thickness = 0.5 mm.)
Set the press-on force of the springs, brake block stroke 0.3 mm and
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brake test switches. See Chapter 7.
ThyssenKrupp Aufzugswerke GmbH
DAF380
40
M /S
AINTENANCE ERVICE
08-2011