Page 12
4 O
PERATION
OF
THE
P
LATFORM
C
ONTROLS
E
MERGENCY
L
OWERING
(
BY
HAND
)
Should the machine become inoperable when elevated request a person on the
ground to lower the platform using the emergency lowering valves. Lower the mast
structure before lowering the jib/platform structure.
Locate the red lever behind the mast cover inspection door on the left hand side of the
machine. By pushing the lever up, the mast will descend fully under gravity. Releasing
the spring-loaded lever will cease this operation immediately if required.
Lower the masts fully before lowering the jib structure.
Figure 8: Emergency Lowering - Mast Valve
Figure 9: Emergency Lowering - Jib Valve
The Jib may be manually lowered by operating the manual release valve located
between the Jib Structure (Figure 9).
M
ANUAL
R
OTATION
1. Lower the masts and jib fully before manually slewing the assembly. Press the
Emergency Stop Button to prevent inadvertent powered motion.
2. Locate the opening behind the front right drive wheel. Apply a 7/8 inch socket wrench
with extension bar to the shaft and turn to rotate the elevating assembly. (Turning the
wheel fully to one side will facilitate this operation).
C A U T I O N
!
!
During manual emergency lowering,
extreme care
must be taken
to ensure that the person carrying out the task is not struck by the
jib or platform structure.
Summary of Contents for MB20N
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