KONE Maintenance Method
MX10 / MX20 MCP Procedures - ASME A17.1-2013 / CSA B44-13
© 2014 KONE Corporation PSK8-604-MX10/MX20
All rights reserved.
62 (-) 2014-12-15
8.6.4.5: Safeties (continued)
Procedure
8.6.4.5.1
Clean the governor rope releasing carrier, the safety linkage, and the safety dogs and
wedges. Remove any paint, rust, corrosion or other foreign material that could possibly
interfere with the correct operation of the safety mechanisms.
8.6.4.5.2
• Examine the releasing carrier and ensure the spring tension of the releasing carrier is
sufficient to prevent the governor rope from pulling out of the carrier during the normal
starting and stopping of the elevator. Also check to ensure the governor rope will pull out of
the releasing carrier when the governor sets.
• Examine the safety dogs or wedges (safety clamps) to ensure they do not touch or ride on
the guide rails during normal elevator operation. Clearance on both sides of the rails should
be approximately the same and should meet the following requirements:
− On elevators built after the 1955 ANSI code the clearance between the safety’s rail-gripping
faces must not be less than the thickness of the guide rail plus 9/64 inch there must be a
minimum of 1/16
inch between either side of the rail and the rail-gripping face.
− On elevators built before the 1955 ANSI Code the clearance between the safety’s rail-
gripping faces must be less than the thickness of the guide rail plus 3/32 in.
− On elevators with wood guide rails the distance between the safety’s rail-gripping faces must
not be less than the thickness of the rail plus ¼ inch.
• Manually move the safety dogs or wedges to ensure they operate freely and smoothly.
Remove any dirt or corrosion to ensure smooth operation.
•
Examine the safety linkage and lift rods to ensure they move freely with the proper clearance.
If necessary, lightly lubricate the lift rods and pivot points with bearing oil.
8.6.4.7: Cleaning of Hoistways (Pit)
Procedure Note
Pit: Remove all debris from the pit. The pit should be
broom clean and should not be used for storage
purposes.
8.6.4.7.2: Landing blocks or pipe stands may be
stored in the pit. If they are, ensure that they are
stored in a manner that does not interfere with
operation of the elevator and does not present any
safety hazard for anyone working in the pit.
8.6.4.7.3: If the pit has an access door, ensure it is
closed and locked.
8.6.4.7.4: Check the pit floor for an accumulation of
water or oil.
Notify a supervisor if either is present.
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