Ground Control Box; Lower Controls - Snorkel MHP 15/44HD Operator's Manual

7. Controls - Electric

Ground Control Box

Con trols for op er at ing the MHP15/44HD from the
ground, (lower con trols) are lo cated on the right
side of the column.

Lower controls:

Emergency stop switch
Platform/ground selector switch
Choke
Master key switch
Boom speed switch
Stabiliser/boom selector switch
Lower boom switch
Upper boom switch
Jib boom switch
Slew switch
Lift enable indicator
Emergency lower valve
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
control box to work. The switch MUST be in
the PLATFORM position (up) for the platform
control box 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.
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. Boom Speed: This control determines how
fast the booms move. Set it to SLOW (turtle)
until you are very familiar with the way the
machine works or if the platform is working in
dangerous or cramped surroundings.
6. Stabliser / Boom Selector Switch:
Must be in Stabliser (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.
page 7 - 2
Con trol switches 7 through 10 are the plat form
mov ing switches. Each is a three po si tion, mo men -
tary con tact, nor mally OFF switch.
7. Lower Boom : UP raises the lower boom.
DOWN lowers the lower boom.
8. Upper Boom: UP raises the upper boom.
DOWN lowers the upper boom.
9. Jib Boom: UP raises the jib boom. DOWN
lowers the jib boom.
10. Slew: LEFT rotates the entire turntable and
boom to the left. RIGHT rotates the entire
turntable and boom to the right.
11. 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
outriggers are not properly set.
12. Height Lockout Switch: This switch (when
fitted), limits the maximum height of the
boom to 10.9 metres (see Options Chapter)
Figure 7.2 - Lower Control Box Controls
Rev F MHP15/44HD – 12885A