GTJZ0612E&0812E&1012E&1212E Maintenance Manual
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© Jul.2020
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SYSTEM DESCRIPTIONS
POWER
GTJZ0612E&0812E&1012E machines are powered by
four 6V batteries in series or a 24V lithium battery to
drive a 24V DC motor. Gear pump and motor output
shaft is splined to provide power to the system.
GTJZ1212E machines are powered by four 12V bat-
teries(two in tandem) or a 24V lithium battery to drive a
24V DC motor. Gear pump and motor output shaft is
splined to provide power to the system.
HYDRAULIC SYSTEM
The hydraulic system of the machine can be divided in-
to two parts: one part is used for steering function and
the other part for platform lifting function.
When the machine is activated, the hydraulic pump
sends pressure oil to the function manifold which is
equipped with directional valves for performing different
actions. To protect relevant components and avoid
pressure overload, the function manifold is provided
with a relief valve.
ELECTRICAL SYSTEM
In the electrical system, GTJZ0612E&0812E&1012E
machines are powered by four 6V batteries in series or
a 24V lithium battery to drive the drive motor and the
motor on the power unit.GTJZ1212E machines are
powered by four 12V batteries(two in tandem) or a 24V
lithium battery to drive the drive motor and the motor on
the power unit. The battery is charged from an external
power supply.
MACHINE CONTROL
SYSTEM
The functions of the machine are controlled with two
controllers in this system. A controller is located on the
right door of the machine and controls the platform up/
down functions. The other controller is located on the
platform and controls lift and drive functions. The
controller exchanges data through a high-speed data
bus.
SAFETY MEASURES
A series of angle sensors and limit switches provides
signals to the controllers. The level sensor measures
the angle of machine on X-axis and Y -axis. When the
angle on X-axis exceeds 1.5 degrees or the angle on Y-
axis exceeds 3 degrees, the alarm will be triggered,
and the function of lift, drive or steer will be limited.
A pothole limit switch confirms if the pothole guards are
fully deployed. When the platform rises to approxi-
mately 80 in. (2 m), the pothole guards are not de-
ployed, and the sensor has not detected the signal, the
platform will stop rising.
Platform weighing system is used to detect the load ca-
pacity of the platform. When the actual platform load ex-
ceeds the rated load (see
), the
platform lifting height is more than 39 in. (1 m) or 10%
of the height that can be lifted(use the greater number),
the overload indicator lamp will illuminate, the alarms
will sound, and the platform will stop moving. To allow
the platform to move again, remove the excess load un-
til the load is less than the rated capacity.
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