Figure 8.3 - Emergency Lower Valve
Con trol le vers 1 through 3 (see Fig ure 8.4) op er ate
the up per and lower boom and slew con trol valves.
All le ver move ment is ver ti cal. This pro duces a cor -
re spond ing up/down move ment for con trol le vers
and
, whilst mov ing le ver
pro duces a move -
ment to the left/right.
1.
Slew:
LEFT rotates the entire turntable and
boom to the left. RIGHT rotates the entire
turntable and boom to the right.
2.
Lower Boom
: UP raises the lower boom.
DOWN lowers the lower boom.
3.
Upper Boom
: UP raises the upper boom.
DOWN lowers the upper boom.
Figure 8.4 - Lower Controls - Movement
Control Valve Levers
■
Platform Control Box
❑
Upper controls (steel basket):
❍
Emergency stop switch
❍
Choke
❍
Start switch
❍
Lift enable indicator
❍
Emergency lower control valve
❍
Valve control lever for slew
❍
Valve control lever for lower boom
❍
Valve control lever for upper boom
❍
Valve control lever for fly boom
❍
Optional Valve control lever for platform
rotate
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) to start or run the MHP from the
platform control box. Pull the switch and it
will pop out (on). Press the switch in (off) if
the platform is to stay in one position for a
long time. That will turn the engine off and
and save fuel.
2.
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.
3.
Start
: This switch works like an automobile
ignition switch. Hold it at START until the
engine starts, then release it to ON (-). If the
engine dies in ON, the key must be turned to
OFF (O) before it will go back to START.
Turn the switch to OFF if the platform is to
stay in one position for a long time, that will
turn the engine off and save fuel.
4.
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.
Figure 8.5 - Upper Control Box Controls -
Steel Basket
5.
Emergency Lower Control:
Allows the
platform to be lowered in the event of an
emergency (Figure 8.6).See Chapter 11
"Emergency Operation" for details of
emergency lowering procedures.
MHP15/44HD – 12885A
Rev F
page 8 - 3
8 Controls - Hydraulic
