Manitowoc Grove RT9150E Operator's Manual page 224

OPERATING CONTROLS AND PROCEDURES
CAUTION
Equipment Damage Hazard!
Never telescope the main boom if there is an error on the
length indicator and on the proximity switch at the same
time.
It wo uld the n n ot b e p oss ible f or y ou to monitor
operations, and components in the main boom could be
damaged, or a situation could arise in which the main
boom can no longer be extended or retracted.
NOTE: In the Telescope Emergency Program, all functions
for retracting the main boom remain enabled as
long as there are no other errors (hydraulic or
mechanical).
The speed is restricted to approximately 30% of the
maximum speed.
Refer to If There is an Error at a Proximity Switch, page 3-
151 or the following section if there is an error on the length
indicator.
If There is an Error on the Length Indicator
Refer to Figure 3-180.
First note down the current status of the telescoping
mechanism:
• Check the positions of the locking pins as usual, i.e. on
the displays (1) and (2).
3-150
• Check whether the display (3) shows the RCL measured
value for the extended length of the telescope cylinder.
• Check the telescoping on the RCL.
Inspections Prior to Telescoping
Refer to Figure 3-181.
Press the
section no more than twice.
If this does not start the unlocking procedure, contact
Crane Care.
Serious injury or death may occur from sudden retraction
of the telescopic section.
Before telescoping, check that the following conditions are
met:
• The telescoping cylinder is locked, symbol (3) is grey.
• The telescopic section is unlocked (press no more than
twice), symbol (1) is yellow.
FIGURE 3-180
• Locking is not selected, symbol (2) is grey.
• The telescope cylinder is at the locking point, the arrows
(4) are green.
Published 2-23-2017, Control # 644-00
RT9150E OPERATOR MANUAL
WARNING
Unintended Operation Hazard!
*
, F1 button (1) for unlocking the telescopic
FIGURE 3-181