Mec SE Series - Up Limit Switch; Level Sensor; Pothole Limit Switches

“SE Series” Service and Parts ManualMarch 2017
Page 1-12
FREQUENT INSPECTION CHECKLIST
U P L IMIT S WITCH
1. Set the Maintenance Locks (see the Introduction portion of this manual).
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.
2. Open the limit switch house cover from the chassis.
3. While raising the platform from the ground controls, push in the roller of the up limit
switch to activate the limit switch.
• Result: The platform stops raising. The machine is functioning properly.
• Result: The platform continues to raise. Inspect or replace the Up Limit Switch.
4. Install the limit switch house cover to chassis.
5. Raise the platform and return the Maintenance Locks to the stowed position.
6. Lower the platform to the stowed position.
L EVEL S ENSOR
1. Move the machine onto a grade which exceeds the rating of the level sensor. Refer to
the Machine Specifications in the Introduction portion of this manual.
2. Press the lift function select button. Standing on the up-hill side of the machine,
attempt to raise the platform to approximately 6.6 ft / 2 m.
• Result: The alarm sounds, and the machine stops lifting after the pothole guards are deployed.
The machine is functioning properly.
• Result: The alarm does not sound and the machine will continue to lift the platform after the
pothole guards are deployed. Adjust or replace the Level Sensor.
3. Press the drive function select button. Standing on the up-hill side of the machine,
attempt to steer and drive the machine.
• Result: The alarm sounds and the machine stops moving. The machine is functioning prop-
erly.
• Result: The alarm does not sound. Adjust or replace the Level Sensor.
4. Lower the platform to the stowed position.
P OTHOLE L IMIT S WITCHES
1. Move the machine onto a firm, level surface. Place a wooden block approximately
2 in / 5 cm tall under the right pothole guard.
2. Press the lift function select button. Attempt to raise the platform approximately 6.6 ft
/2 m.
• Result: The pothole guard contacts the block and does not fully deploy, the diagnostic display
shows code 18, an alarm sounds and the platform will lift to 6.6 ft / 2m or beyond. The
machine is functioning properly.
• Result: The pothole guard contacts the block and does not fully deploy, the diagnostic display
does not show code 18, the alarm does not sound and the machine will continue to lift the
platform after the pothole guards are deployed. Adjust or replace the pothole limit switch.