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8 Controls - Hydraulic
See the "Emergency Operation" chapter 11-1 for
the location of the emergency bleed down control
a n d f o r c o r r e c t e m e r g e n c y b l e e d d o w n
procedures.
The main operating functions of an MHP15/44HD
can be controlled from the ground control box or
from the platform control box.
WARNING
Pinch points may exist between moving
components. death or serious injury can
result from becoming trapped between
components, buildings, structures, or other
obstacles. Make sure all personnel stand
clear while operating the MHP.
Ground Control Box
Con trols for op er at ing the MHP15/44HD from the
ground, (lower con trols) are lo cated on the side
and rear of the col umn.
Lower controls:
Emergency stop switch
Platform/ground selector switch
Choke
Master key switch
Stabiliser/boom selector switch
Lift enable indicator
Height lockout switch (where fitted)
Emergency lower control valve
Valve control lever for lower boom
Valve control lever for upper boom
Valve control lever for slew
1. Emergency Stop: Press the red
EMERGENCY STOP button in, at any time,
under any conditions, and the entire machine
stops, and nothing moves. This switch must
be out (on) for anything on the MHP to work.
Pull the switch and it will pop out (on).
2. Platform/Ground Selector : Must be in the
GROUND position (down) for the ground
controls to work. The switch MUST be in the
PLATFORM position (up) for the platform
controls to work.
3. Choke/Cold Start: Hold the switch UP while
you start an engine that is at ambient air
temperature (a "cold" engine). This will choke
the engine.
page 8 - 2
4. Master Key Switch: This switch works like
an automobile ignition switch. Hold it at
START until the engine starts, then release it
to ON. (-) Turn the Master Key Switch to
OFF (O) if the platform is to stay in one
position for a long time, that will turn the
engine off and save fuel.
5. Stabiliser / Boom Selector Switch:
Must be in Stabiliser (outrigger) position
(down) for the outriggers to work. Once
outriggers are down and set the switch must
be placed in the boom (up) position for the
booms to work.
6. Lift Enable: The platform can only be raised
when this light is lit. When this light is not lit
the platform will not raise because the
stabilisers are not properly set.
7. Height Lockout Switch: This switch (when
fitted), limits the maximum height of the
boom to 10.9 metres (see Options Chapter).
Figure 8.2 - Lower Control Box Controls
8. Emergency Lower Control: Allows the
platform to be lowered in the event of an
emergency (see Figure 8.3).See Chapter 11
"Emergency Operation" for details of
emergency lowering procedures.
Rev F
MHP15/44HD – 12885A
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