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4.2.7.
Checking the adjustment of the overload protection device
Check the adjustments of the overload protection device as follows:
1. Check the test loads and the adjusted values in the table of the chapter “Safety devices”.
2. Put a test load onto the platform
3. Drive the boom to a horizontal position.
4. After this, extend the telescope until the red signal light lights up and the movement
stops.
5. Measure the stroke and compare it with the adjusted value for RK4 in the table.
6. If the stroke is longer, readjust according to the instructions.
4.2.8.
Check the operation of the load regulation valves
Check the operation of the valves in accordance with the instructions below. If the valve
has leaked, carry out the measures according to the service instructions after the inspection
instructions.
1. Load holding valves of the outriggers
• using the outriggers, raise the lift off the ground on a level surface
•
measure the distance from the chassis to the floor separately at each outrigger
• leave the lift in this position for a few minutes.
• measure the distances again. The distances should be the same as at the beginning.
2. Load regulation valves of the boom cylinder and the cylinders of the articulated arms
• drive the boom to a location where you can reliably measure its position
• keep an eye on the boom for a few minutes
• repeat the measurement. The position of the boom should be the same as at the
beginning
3. Load regulation valve of the telescope cylinder
• drive the telescope to a determined position
• measure the length of the telescope cylinder's stroke
• drive the boom to an almost vertical position, and leave it there for a few minutes
• lower the boom and repeat the measurement. The length of the telescope stroke should
not have changed.
4. Load regulation valve of the work platform's levelling system
• put a load of 100–200 kg on the platform
•
measure the height of the platform's rear edge from the floor
• leave the lift in this position for a few minutes
• repeat the measurement. The height position of the platform's edge should be the same
as at the beginning.
