OPERATOR’S MANUAL with Maintenance Information
Maintenance
56
Checklist C Procedures
C-1
Test the Platform Overload System
Dingli specifications require that this procedure
be performed every 500 hours or
semi-annually, whichever comes first OR when
the machine fails to lift the maximum rated
load.
Testing the platform overload system regularly
is essential to safe machine operation.
Continued use of an improperly operating
platform overload system could result in the
system not sensing an overloaded platform
condition. Machine stability could be
compromised resulting in the machine tipping
over.
Note: Perform this procedure with the machine
on a firm, level surface that is free of
obstructions.
1 Turn the ground red Emergency Stop
button clockwise to the on position. Pull
out the platform red Emergency Stop
button to the on position.
2 Turn the key switch to platform controls
and start the engine from platform
controls.
3 Determine the maximum platform capacity.
4 Using a suitable lifting device, place an
appropriate test weight equal to the
maximum platform capacity in the center
of the platform floor.
⊙ Result: The overload alarm at the platform
controls should not sound, indicating a
normal condition.
¤ Result: The overload alarm at the platform
controls sounds. Calibrate the platform
overload system.
5 Add an additional weight to the platform
not to exceed 20% of the maximum rated
load.
⊙ Result: The overload alarm at the platform
controls sound, indicating a normal
condition.
¤ Result: The overload alarm at the platform
controls does not sound. Calibrate the
platform overload system.
6 Test all machine functions from the
platform controls.
⊙ Result: All platform control functions should
not operate.
7 Turn the key switch to ground control. and
start the engine from ground controls.
8 Test all machine functions from the ground
controls
⊙ Result: All ground control functions should
not operate.
9 Lift the test weight off the platform floor
using a suitable lifting device.
⊙ Result: The overload alarm at the platform
controls should not sound, indicating a
normal condition.
¤ Result: The overload alarm at the platform
controls sounds. Calibrate the platform
overload system.
10 Test all machine functions from the ground
controls.
⊙ Result: All ground control functions should
operate.
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