Kone MX20 - Inspection of Governor; Testing of 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.
69 (-) 2014-12-15
10) Remove temporary governor overspeed switch jumper at LCEADON2 XM3A/1-3.
11) Remove temporary safety plank switch jumper at LCEADON2 XC1/3-5.
12) Run elevator on inspection and see that all safety circuits have made up.
13) Run elevator on normal operation and verify car runs normally.
8.6.4.19.3: GOVERNOR
Category 1 inspection of governor
OPEN the mainline switch.
Make a general inspection of the governor-rope system, including the condition of the governor,
governor rope, governor-rope tension sheave assembly, and the releasing carrier. Make sure all
mountings are secure.
Check the rope type to see if it is the type of rope identified on the governor marking plate.
Note: Governor ropes must not be lubricated.
With the governor weights extended (spread apart by hand) check to see if all governor
components, including the rope-gripping jaws,
operate freely. There must NOT be any restriction
of motion.
Check all bearings, pins, governor-rope jaws, and rubbing surfaces to see if they are properly
lubricated, free of paint, and are not worn excessively.
Category 1 testing of governor
CLOSE the mainline switch.
Open the governor overspeed (stopping) switch and make sure the elevator cannot be operated.
Reset the governor overspeed switch and operate the car at normal speed in each direction.
Check to determine if the following possible PROBLEMS exist.
• Governor rope slides on the sheave groove when the car is started or stopped.
• Governor sheave has eccentric or lateral motion.
• Governor rope does NOT run free of the governor jaw at all times.
After testing the governor, the following tasks must be completed.
• Restore the governor release carrier.
• Reset and inspect the governor.
• Fill out a metal test tag and attach it to the governor with a wire.
• Record all work completed on a Safety Test Form, and return it to your KONE Service
Superintendent.