PRE-OPERATION FUNCTION TEST
GTZZ14EJ&16EJ Operation Manual 6-13 © Dec 2021
and then drive the machine onto the two wooden
blocks.
11. The tilt alarm sounds and the chassis tilt indicator
light flashes, some functions are restricted, but the
boom retracting, lowering and turntable rotating are
allowed.
12. Retract and lower the boom, drive off the machine
in non-operating position and remove the wooden
blocks.
TESTING THE MAXIMUM
OPERATING RANGE
Maximum horizontal extension
0kg≤ platform loading capacity ≤230kg (507 lb)
1. Turn the ground/platform select switch on the
ground controller leftwards to the ground control
position.
2. Push the emergency stop button on the ground
controller to the position ON.
3. Use the foldable boom luffing function to adjust
the foldable boom to the maximum angle.
4. Use the main boom telescoping function to
extend the boom.
5. GTZZ14EJ: the boom will stop when it reaches
the farthest position (with the length of 7.6m),
and then the upper and lower buzzers will
sound, the boom can’t be further extended or
changed in angle but can be retracted, and the
turntable can be slowly rotated.
6. GTZZ16EJ: the boom will stop when it reaches
the farthest position (with the length of 9.3m),
and then the upper and lower buzzers will
sound, the boom can’t be further extended or
changed in angle but can be retracted, and the
turntable can be slowly rotated.
7. Retract the boom using the main boom
telescoping function.
8. The boom can be retracted in place.
Maximum luffing angle of main boom
1. Turn the ground/platform select switch on the
ground controller leftwards to the ground control
position.
2. Push the emergency stop button on the ground
controller to the position ON.
3. Use the foldable boom luffing function to adjust
the foldable boom to the maximum angle.
4. Adjust the main boom to the horizontal position
and the jib upwards to the highest position using
the main boom luffing and jib up/down functions
respectively.
5. Adjust the main boom to the maximum angle
using the main boom luffing function.
6. The main boom will stop luffing when it reaches
the maximum angle ( 72°[±1°] ).
7. The main boom will stop luffing when it reaches
the minimum angle ( 0°[±1°] ).
8. Retract and luff the boom downwards using the
boom telescoping function and boom luffing
function respectively.
9. The boom can be retracted in place.
Note: The maximum allowable tolerance of the angle
sensor in the whole range of measurement shall be
no greater than 0.5°.
TESTING THE WEIGHING
SYSTEM
Before the test, move the boom fully up and down and
telescope in and out for at least twice to ensure the
pulley and track are adequately lubricated. The test
results are shown in the table below:
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