Mec Micro 26 - Page 32

Page 28 Micro 26 - Service & Parts Manual
April 2019Section 11 - Maintenance
Limit Switches
ART_5121
Up Limit
Switch
Down Limit
Switch
Scissor Tube
Switch
Actuator
Switch
Assembly
Cover
Maintaining the limit switches is essential to safe operation and
good machine performance. Operating the machine with a faulty
limit switch could result in reduced machine performance and a
potentially unsafe operating condition.
Perform these procedures with the machine on a firm, level
surface that is free of obstructions.
DEATH OR SERIOUS INJURY HAZARD!
NEVER PERFORM WORK OR
INSPECTION ON THE MACHINE WITH
THE PLATFORM ELEVATED WITHOUT
FIRST BLOCKING THE SCISSOR
ASSEMBLY WITH THE MAINTENANCE
LOCK.
Down Limit Switch
The Down Limit Switch alerts the system when the platform is elevated above 6.5 feet (2 m).
Remove the platform controls from the platform.
Set the Maintenance Locks (see the Introduction portion of this manual).
Turn the key switch to the off position.
Tag and disconnect the platform control box at the platform.
Locate the mating connector located inside the control cabinet. Disconnect the connector.
Securely install the platform control box harness plug into the 6-pin connector of the ECU cable.
Remove the Limit Switch Assembly Cover.
Open the Down Limit Switch cover, tag and disconnect the wires of the Down Limit Switch wire
harness.
Turn the key switch to platform control.
Raise the platform and return the Maintenance Locks to the stowed position.
Working at the platform controls, press the lift function select button. Lower the platform to the
stowed position.
Result: The diagnostic display will show code 18, an alarm sounds and the lift function should
not operate. The machine is functioning properly.
Result: The diagnostic display does not show code 18, the alarm does not sound and the lift
function operates. Replace the Down Limit Switch.
Press the drive function select button. Attempt to drive the machine.
Result: The diagnostic display will show code 18, an alarm sounds, and the steer and drive
functions should not operate. The machine is functioning properly.
Result: The diagnostic display does not show code 18, the alarm does not sound, and the
steer and drive functions operate. Replace the Down Limit Switch.
Press the lift function select button. Raise the platform approximately 12 in / 0.3 m.
Result: The diagnostic display will show code 18 and an alarm sounds. The machine is
functioning properly.
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