Snorkel MB20N-sn0001-0131 - Manual (Page 14)

Operation
MB20NMB26
Emergency Lowering (by hand)
EMERGENCY SITUATIONS
in any emergency situation, the immediate action is
to push the red “Emergency Stop” button . This will
instantly cut of all electrical power to the controls.
The button must be twisted in a clockwise direction
in order to recommence control. However, the switch
should be reset only when it is safe to do so.
If the Audible warning alarm sounds, normal control
functions will cease to operate. This will be due to
the following problem ;
z z z z z The Tilt Sensor has been activated
In this situation the procedure is to turn the Platform
“ON/OFF/OVERRIDE” Keyswitch to the
‘EMERGENCY OVERRIDE’ position. Hold in this
position while using the Mast and/or Jib boom down
controls as normal. Do not begin to slew (rotate)
until close to the ground.
Note that during emergency operation, controls will
operate only at a fixed, slow speed and will not allow
the raising of the Booms. The Booms can only be
lowered.
1. Check that the route is clear of persons,
obstructions, pot holes or ledges and is
capable of supporting the wheel loads. Also,
check that the clearances above, below and
to the side of the Work Platform are sufficient .
2. Ensure that the pothole guards remain in the
ex tended (down) position during elevated
travel.
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 pulling on the lever, 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.
The Jib may be manually lowered by removing the
chassis rear cover and locating the screw type valve
on the underside of the valve bloc. Turning the knob
clockwise allows the jib to descend slowy.
MANUAL ROTATION
1. Lower the masts and jib fully before manually
slewing the assembly. Press the Emergency
Stop Button to prevent inadvertant 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)
Page 13
CAUTION CAUTION CAUTION CAUTION CAUTION
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.
Turn
wheels to
right.
Use 7/8”
socket &
extension
as shown.
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