© Nov. 2022 6-14 GTZZ25J Operation Manual
PRE-OPERATION FUNCTION TEST
TESTING THE TILT
PROTECTION SYSTEM
Figure 6-4
1. Start the machine.
2. With the machine in non-operating position, flip the
level switch to exceed 5°in X (left-to-right)/Y (front-
to-back) direction.
3. The tilt alarm sounds and the chassis tilt indicator
light flashes, with no function restricted.
4. With the machine in operating position, flip the level
switch to exceed 5°in X (left-to-right)/Y (front-to-
back) direction.
5. The tilt alarm sounds with the chassis tilt indicator
light flashing, some functions are restricted, but the
boom retracting, turntable rotating and boom
lowering are allowed.
6. Place two wooden blocks under the two wheels on
the left or right side of the machine. The wooden
block should be 750×250×170mm
(2.46×0.82×0.56ft) in size (L×W×H). With the
machine in non-operating position, drive it onto the
two wooden blocks.
7. The tilt alarm sounds and the chassis tilt indicator
light flashes, with no function restricted.
8. Drive the machine off and remove the wooden
blocks.
9. Place two wooden blocks under the two wheels on
the front or rear of the machine. The wooden block
should be 750×250×177mm (2.46×0.82×0.58ft) in
size (L×W×H). With the machine in operating
position, drive it onto the two wooden blocks.
10. The tilt alarm should sound with the chassis tilt
indicator light flashing, some functions are
restricted, but the boom retracting, turntable
rotating and boom lowering are allowed.
11. Drive off the machine in non-operating position and
remove the wooden blocks.
TESTING THE WEIGHING
SYSTEM
Before the test, fully raise and lower the boom and fully
extend and retract the boom for at least twice to ensure
the pulley and track are adequately lubricated.
Table 6-5
MODEL TEST RESULTS
GTZZ25J
When the load does not exceed 230kg (507lb), the platform can be raised to the highest
position.
Boom in non-operating position: when the load exceeds 230kg (507lb), the buzzer will sound
continuously, the overload indicator light will flash, the display screen will indicate platform
overload, such functions as machine driving, boom raising and extending will be restricted and
will not resume until the excessive load is removed. Boom in operating position (for GB
models): when the load exceeds 230kg (507lb), the buzzer will sound continuously, the
overload indicator light will flash, the display screen will indicate platform overload, some
functions will be restricted but boom retracting, lowering and turntable rotating are allowed.
Such functions will not resume until the excessive load is removed.
Boom in operating position (for CE models): when the load exceeds 230kg (507lb), the buzzer
will sound continuously, the overload indicator light will flash, the display screen will indicate
platform overload, all the functions will be restricted and will not resume until the excessive
load is removed.
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