3.
Take down the split pin, inspect and confirm that
the mounting nuts have been tightened with
correct torque.
When
inspecting
the
retaining nut, it is
necessary to replace the
split pin frequently.
4.
Replace the split pin, and bend it to locking
position.
B-3 Test Key Switch
The flexible operation of key switch is of great
importance to the safety of the machine. Failure of
key switch might cause hazardous operation.
A key switch is on the ground control panel of the
machine and is used to control the On-Off of the
power supply and select upper/lower platform control.
When inspecting this item,
it is necessary to operate
on the ground and not to
stand on the platform.
1.
Release the emergency stop buttons on upper and
lower platforms.
2.
Turn the key switch to the position of lower
platform control.
Result: The power indicator lamp is lit up and the
upper platform control becomes invalid.
3.
Turn the key switch to the position of upper
platform control.
Result: The power indicator lamp is lit up and the
lower platform control becomes invalid.
4.
Turn the switch to the middle position (“OFF”).
Result: All actions become inoperative.
B-4 Test Emergency Stop Buttons
The function of the emergency stop buttons is of great
importance to the safe operation of the machine. If the
emergency stop buttons fail, the power unit and the
machine could be stopped under emergency. It would
put the personnel working on the ground and the
platform in danger.
The ground controller shall
precede over the platform
controller (including emergency stop buttons).
1.
Release the emergency stop button of lower and
upper platforms, and turn the key switch to the
ground control position.
2.
Press the emergency stop button on the ground
operation panel.
Result: All actions of the machine become
inoperative.
3.
Release the emergency stop button of lower and
upper platforms, and turn the key switch to the
platform control position.
4.
Press the emergency stop button on the platform
operation panel.
Result: All actions of the machine become
inoperative.
The ground and platform
emergency stop buttons
may stop all actions of the
machine even the key switch is turned to the platform
controller.
B-5 Test Horn
The horn function is of great importance to the safe
operation of the machine. If the horn button is pressed
on the platform controller, the horn will be ringed on
the base frame to warn the personnel on the ground.
the operator could not send safety warning signal to
the personnel on the ground if the horn function fails.
1.
Release the emergency stop button of lower and
upper platforms, and turn the key switch to the
platform control position.
2.
Press the horn button on the platform controller.
Result: The horn rings.
B-6 Test Braking Device
Proper brake is of great importance to the normal and
safe operation of the machine. The braking is required
to be stable, shock-free and noise-free.
This machine applies rear wheel braking.
The vehicle is no-loaded
and the boom is retracted
fully.
Attention
Attention
Attention
Attention
Attention
17
GTJZ1412 & GTJZ1414
Maintenance Manual
