Zoomlion ZRT850, Operator'S Manual

Page: 120 / 179

O
pe
rat
ing
Inst
ru
ctio
ns
Operator’s Manual for Rough Terrain Crane
Figure 7-13 Telescopic Sections – Extend
D. Release the pedal slowly to the neutral position to stop the telescoping movement.
The boom stops at that point.
CAUTION
When you extend the boom and the hook block touches the anti-two block
weight, the items below occur:

A warning noise sounds

A warning light illuminates.
When the warning occurs, the function of the items below, stop:

Winch spool-up

Boom extension

Derrick boom down.
If you must extend the boom more, use the reel-off function (push the right
joystick forward) to lower the hook block.
The crane has a bypass key switch that prevents the warning indications. When
the maintenance personnel repair or check out the functions on the crane, they
can turn the bypass key switch.
7-22 ZRT850 Rough Terrain Crane