Mec 4046SE - Battery Charging Procedures

Page 28 SE
AC
Slab Series - Service & Parts Manual
March 2022Section 10 - Maintenance
Limit Switches
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.
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).
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ART_5121
Scissor Tube
Switch
Assembly
Cover
Up Limit
Switch
Down Limit
Switch
Switch
Actuator
Indoor/Outdoor
Height
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.
Turn the key switch to the off position.
Tag and disconnect the platform control box at the platform.
Follow the platform control cable down the scissor stack to the underside of the chassis deck.
Tag and disconnect the platform cable from the ECU cable at the 6-pin connector under the
chassis deck.
Securely install the platform control box harness plug into the 6-pin connector of the ECU cable.
Remove the 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.
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