Kone MX20 - Check Operation of the Overspeed Contact; Check the Pulley Bearings (Governor)

KONE Maintenance Method
MX10 / MX20 MCP Procedures - ASME A17.1-2013 / CSA B44-13
© 2014 KONE Corporation PSK8-604-MX10/MX20
All rights reserved.
43 (-) 2014-12-15
Check operation of the overspeed contact (OL35)
Procedure Note
1. Turn the contact plate (1) so that the knob of the
overspeed contact is not in the notch of the
contact plate.
2. Check that overspeed contact cuts the safety
chain.
Elevator must not drive in the normal or
inspection drive mode.
NOTE! Recall drive mode (RDF)
bypasses the overspeed contact
Check the pulley bearings (OL35)
Procedure Note
1. Push and pull the pulley in the axial direction, use
your hand.
Maximum free play +/- 1 mm
measured on outside diameter
of the 200 mm pulley.
2. Check that the pulley does not move in the axial
direction (No free play).
If there is axial free play the governor must be
replaced.
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