KONE Maintenance Method
MX10 / MX20 MCP Procedures - ASME A17.1-2013 / CSA B44-13
© 2014 KONE Corporation PSK8-604-MX10/MX20
All rights reserved.
20 (-) 2014-12-15
8.6.4.6: Brakes
Note
8.6.4.6.2 / 8.6.4.6.3: If any part of the driving machine or emergency brake is changed or
adjusted that can affect the holding capacity or decelerating capacity of the brake, it shall be
adjusted and checked by means that will verify its proper function and holding capacity.
A test complying with 8.6.4.20.4 shall be performed.
MX10 & MX20 Brake Maintenance
MX10 MX20
General Maintenance Information for MX10 and MX20 Brakes
• MX10 and MX20 machines are equipped with two independent direct acting brakes. The
brakes must always be adjusted separately.
• The center nut must be checked during routine maintenance and prior to any brake adjustment
to verify the washer is loose under the center nut when the brake is set. As the brake shoe
wears, the center nut moves in with the brake shoe and can bottom against the brake body,
preventing the brake from setting fully. Loosen the center nut as needed until the washer under
the nut turns freely.
• There are four adjusting screws per brake. The adjusting screws are held in place by locking
plates. The locking plates must always be in place during elevator operation to prevent the
adjusting screws from changing.
• Adjusting the brake is a four-corner procedure. Any adjustment must be made evenly on the
four screws. Turning one screw significantly more than the others will cause the brake to bind
internally and the brake will not pick consistently.
• The adjusting screws are very sensitive. A ¼ turn corresponds to a .010 in. [.25 mm] change in
air gap.
• For MX10 and MX20, the emergency brake is the brake closest to the motor junction box. The
emergency brake will be marked with an identifying label.
• Always put elevator on cartop inspection for MX10 and MX20 applications
To Next Page
Loading...