
Page 12 December 2007
Rough Terrain Electric Scissors
Control Functions Section 2 - Familiarization
It is the responsibility of the operator to read, completely understand and follow all instructions and warnings
contained in this operating manual and on the aerial platform.
FAMILIARIZATION
2.2 Component Identification
The following descriptions are for identification,
explanation and locating purposes only.
2.2-1 Motion Alarm
The alarm produces an audible sound when any control
function is selected. On MEWPs with certain options, a
flashing amber light will accompany this alarm.
2.2-2 Tilt Alarm
The MEWP is equipped with a device which senses
when the MEWP is out of level in any direction. When
activated, it disables drive and lift functions of the MEWP
and an alarm produces an audible sound accompanied
by the amber light. If the alarm sounds, lower the
platform completely, then reposition MEWP so that it is
level before raising the platform.
NOTE
If the tilt alarm sounds and the platform does
not, or only partially raises, immediately
lower the platform completely and ensure
that the MEWP is on a firm, level surface.
2.2-3 Brake System
The brake system is located on the main manifold in
the motor/hydraulic compartment. The brakes must
be manually disengaged before pushing, winching or
towing. Refer to Section 2.5-2 for procedure on how to
release the brakes manually. The system contains the
following controls:
2
1
Figure 2-1. Brake System
1. Brake hand pump
2. Brake auto reset valve plunger
2.2-4 Load Sensing System
This system is a safety device that prevents any normal
movement of the MEWP from a stationary working
condition after the rated load is reached and exceeded.
Refer to Table 4.4 for maximum platform capacities.
• When 90% of the rated load is reached:
The red power indicator light on the platform
control console flashes.
• When the rated load is reached:
An audible alarm sounds for approximately
2 seconds, 5 times per minute.
• When the rated load is exceeded:
The flashing light and audible alarm continue
and all electrically controlled MEWP movement
functions stop. To resume normal operation,
remove the overload from the platform.
• If the MEWP during the operation comes in
contact with an overhead obstruction:
The platform could become overloaded and all
functions would stop. Release of the platform from
this situation can only be effected by use of the
emergency lowering system. Refer to Section 2.6.
NOTE
After reaching full extension and upon
lowering, the MEWP could stop and take an
overload reading. Return the proportional
controller to the neutral center position,
and release the enable trigger switch. If the
MEWP is overloaded, the flashing light and
audible alarm continue and all electrically
controlled MEWP movement functions stop.
To resume normal operation, remove the
overload from the platform.