Emergency Lower Machines With Electric Controls; Lower Control Box; Upper Control Box; Platform Control Switches Machines With Electric Controls - Snorkel MHP 15/44HD Operator's Manual

9. Pre-operational Inspection
NOTE
Pay particular attention to the Emergency Stop
switch to see that it turns the MHP15/44HD
engine off when the red button is struck.
Emergency Lower
Machines with Electric Controls

Lower control box

Figure 9.19 - Emergency Lower Valve
With the booms raised open the Emergency
Lower Valve on the top of the main valve block.
The booms should be gin to lower. The rate of low -
er ing can be reg u lated by the amount the valve is
opened.
To check the slew func tion when us ing the man ual
emer gency lower valve the Mas ter Key Switch
and Emer gency Stop switch must be on and the
Plat form/ground Se lec tor must be set to ground.
To slew (with the man ual emer gency lower valve
al ready open) se lect the re quired di rec tion on the
slew tog gle switch .
NOTE
The manual emergency lower valve must be
closed after the test to ensure proper boom
operation.
For cor rect emer gency low er ing op er at ing pro ce -
dures see "Emer gency Op er a tion" chap ter 11.

Upper control box

Emer gency lower from the up per con trol box is
achieved by turn ing the up per con trol to on and de -
press ing the foot switch whilst op er at ing the Emer -
gency Lower switch
page 9 - 6
To slew the unit se lect the di rec tion re quired on the
slew tog gle switch at the same time. For cor rect
emer gency low er ing op er at ing pro ce dures see
"Emer gency Op er a tion" chap ter 11.
Platform Control Switches
Machines with Electric Controls
Figure 9.20 - Platform Control Switches
On the ground con trol box set the Ground/Plat -
form Se lec tor to plat form.
Check that each of the platform moving switches
( through to ) cause the platform to move the
way it should.
Check both po si tions of each switch.
For cor rect op er at ing pro ce dures see the "Op er a -
tion" chap ter 10.
NOTE
Pay particular attention to the Emergency Stop
switch to see that it turns the MHP15/44HD
engine off when struck.
Pay particular attention to the platform foot switch
to see that it deactivates the platform moving
switches when the foot switch is not stepped on.
At the completion of the above section the unit
can be returned to the stowed position.
Rev F MHP15/44HD – 12885A