March 2008 "3072RT / 3772RT / 3772RT HD" Service & Parts Manual - ANSI Specifications
Page 3-14
OUTRIGGER FUNCTION
The outriggers on the RT series MEC Scissor Lifts are a One-Touch Activation system. To deploy
the outriggers, simply push the outrigger toggle switch down until the outriggers level the unit and
the engine returns to idle. You are now ready to lift the platform. The outrigger control module is a
“smart” unit, which will level the unit in all but extreme terrain so you don’t have to attempt to level
it yourself.
Operational Characteristics
· To deploy the outriggers, push the Outrigger Switch down and hold until the engine returns
to idle. The unit will self-level.
· The outrigger legs can not be operated individually.
· The outriggers system will not operate when the platform is elevated above approximately
10 feet (3m)
· Travel is locked out when the outriggers are deployed. A Drive Indicator Light, above the
outrigger switch, will illuminate when the outriggers are fully retracted.
· The engine will not return to idle when the outriggers are fully retracted. The drive indicator
light is your signal that the outriggers are fully retracted.
· If the slope of the terrain is in excess of the outrigger’s leveling capabilities, the outrigger
control system will continue to attempt to level and the engine will not return to idle. In this
case, if the platform remains outside of the pre-described tilt sensor parameters, the unit
will not elevate above 6 feet (2m) and the alarm will sound, indicating the out-of-level
situation.
· The outrigger system uses a Top-out limit switch and a Pressure switch on each leg to
monitor their respective positions.
· Each outrigger leg uses a Retract valve and an Extend valve to control cylinder stroke.
These are located under the protective cover atop the outrigger leg.
· A 4-way, 3-position valve, on the outrigger hydraulic manifold controls the direction of oil
flow to the outrigger legs.
· The GP106 Outrigger Control Module controls all outrigger valve and interlock duties as
well as sensing unit level.
· Diagnosis of the GP106 Outrigger Control Module is possible by counting the number of
flashes from the red LED and referring to
Outrigger Module GP106 LED Flash Codes
at
the end of this section. Diagnosis and calibration of the outrigger module can also be done
through the use of the EZ-Cal scan tool MEC part # 90888. (See GP106 troubleshooting in
this section)
· If the GP106 Outrigger Control Module is ever replaced or removed or if you suspect that it
requires calibration, you must use the EZ-Cal scan tool and the following directions to
calibrate the outrigger module.
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